Details of a Researcher - Yamanaka, Naoaki

Presentations -

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敷設空孔コアファイバを用いた二芯化10G-EPONの動作実験

Satoru Okamoto, Takahiro Ishiyama, Naoaki Yamanaka

IEICE Society Conference,

2024.09

First Demonstration of Switched RoF Concept Using MEMS Optical Switch a nd High-linearity Installed Hollow Core Fiber Cables

Ryuta Murakami, Kojiro Nishimura, Satoru Okamoto, Yoshihiko Uematsu, Takashi Kurimoto, Naoaki Yamanaka

50th European Conference and Exhibition on Optical Communication (ECOC 2024),

2024.09

キャンパス敷設空孔コアファイバケーブルを用いたLocal 5G over PON構築実験

Satoru Okamoto, Naoaki Yamanaka, Hiroyuki Tsuda, Motoharu Matsuura, Takeshi Takagi, Kazunori Mukasa

IEICE Technical Report on Photonic Network,

2024.08

Disaggregated Computing Access Network using Newly Structured Hollow-Core fiber for AIoT Platform

Naoaki Yamanaka, Takahiro Ishiyama, Satoru Okamoto, Hiroyuki Tsuda, Kazunori Mukasa

2024 IEEE Annual Congress on Artificial Intelligence of Things (AIoT),

2024.07

Newly structured Hollow-Core Fiber and its open innovation field for Power over fiber, Radio over fiber and ultra-low latency application

Naoaki Yamanaka, Satoru Okamoto, Hiroyuki Tsuda, Motoharu Matsuura, Kazunori Mukasa

24th International Conference on Transparent Optical Networks (ICTON 2024),

2024.07

1st demonstration of the multi-spot RoF concept using Wi-Fi AP as an em ulated base-station

Kojiro Nishimura, Ryuta Murakami, Yoshihiko Uematsu, Satoru Okamoto, Naoaki Yamanaka

20th International Conference on IP/IoT & Processing+Optical Networks (iPOP 2024),

2024.06

Location free ONU system by optical power supply over Hollow Core Fiber

Takahiro Ishiyama, Takashi Kurimoto, Satoru Okamoto, Naoaki Yamanaka

20th International Conference on IP/IoT & Processing+Optical Networks (iPOP 2024),

2024.06

Switched RoF: Toward Personalized Cell Mobile Front Haul Using Optical Switch

Ryuta Murakami, Kojiro Nishimura, Satoru Okamoto, Takashi Kurimoto, Yoshihiko Uematsu, Naoaki Yamanaka

20th International Conference on IP/IoT & Processing+Optical Networks (iPOP 2024),

2024.06

Power Saving Effects in Switched RoF

Ryuta MURAKAMI, Satoru OKAMOTO, Yoshihiko UEMATSU, Takashi KURIMOTO, Naoaki YAMANAKA

IEICE Technical Committee on Photonic Network (PN) (奄美市社会福祉センター ) ,

2024.03

Oral presentation (general)

(Special Invite Talk) Aiming for the future optical networks －20 years of PN-TC and Keio future optical network open labs-

Naoaki Yamanaka

IEICE Technical Committee on Photonic Network (PN) (奄美市社会福祉センター ) ,

2024.03

Oral presentation (invited, special)

Linux PCによるWiFi APを利用したアナログRoF検証環境の構築

Satoru Okamoto, Ryuta Murakami, Kojiro Nishimura, Naoaki Yamanaka, Motoharu Matsuura

IEICE General Conference,

2024.03

Method to reduce imbalance charges for electricity retailers using EVs, aiming to balance the interests of both electricity retailers and EV users

Takato IEKI, Mayuko OMICHI, Satoru OKAMOTO, Naoaki YAMANAKA

IEICE Technical Committee on Information Networks (IN) (沖縄コンベンションセンター) ,

2024.02

Oral presentation (general)

Edge computing that utilizes in-network CPUs to achieve high capacity and interruption tolerance with fewer edge servers

Koki Muramatsu, Yoshihiko Uematsu, Satoru Okamoto, Naoaki Yamanaka

International Workshop on Computing, Networking and Communications (CNC 2024),

2024.02

Time-space synchronized digital twin application for URLLC usingnewly structured Hollow-Core Fiber and its open innovation field

Naoaki Yamanaka

International Conference on Computing, Networking and Communications (ICNC2024),

2024.02

Resource Allocation of the Virtual Reconfigurable Processors using the Biological Attractor Selection

Satoru Okamoto, Misato Kamio, Chiaki Hara, Naoaki Yamanaka

The 2018 IEICE General Conference (東京電機大学　東京千住キャンパス（東京）) ,

2018.03

Oral presentation (general)

再構成可能通信処理プロセッサをリソースプールとして取り扱い, 網内のリソースプールを光網で接続してサービス用仮想通信処理プロセッサ(VRCP)を構築することを提案している. リソースプールから処理モジュールを選択して割当てる手法として, 省電力優先及びQoS優先の準最適化アルゴリズムを提案した. 本稿では, 動的にVRCP再構成を行うことでより一層の最適性を実現することを目的として, リソース割当に利用可能なゆらぎ制御手法を分散制御可能とした分散ゆらぎ制御でVRCPリソース割当を実現する手法を提案する.

Flow/Application Triggered SDN control in Hybrid Data-center Network "HOLST"

Yukihiro Imakiire, Masayuki Hirono, Masaki Murakami, Satoru Okamoto, YAMANAKA NAOAKI

41st The Optical Fiber Communication Conference and Exhibition (OFC2018) (San Diego, USA) ,

2018.03

Oral presentation (general)

First Experimental Demonstration of Disaggregated Emergency Optical System for Quick Disaster Recovery

Masaki Shiraiwa, Noboru Yoshikane, Sugang Xu, Takehiro Tsuritani, Naoki Miyata, Tatsuo Mori, Masatake Miyabe, Toru Katagiri, Sota Yoshida, Masaki Tanaka, Tomofumi Hayashi, Hidetsugu Sugiyama, Ikuo Satou, Mashito Mikuni, Satoru Okamoto, YAMANAKA NAOAKI, Yoshinari Awaji, Naoya Wada

41st The Optical Fiber Communication Conference and Exhibition (OFC2018) (San Diego, USA) ,

2018.03

Oral presentation (general)

Fast finding method of optical circuit sharing rack groups in the HOLST datacenter network based on time division multiplexing using high-speed optical switches

Masayuki HIRONO, Akira YAMASHITA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (南種子町商工会館（鹿児島県）) ,

2018.03

Oral presentation (general)

近年急激に増加しているデータセンター内の消費電力を削減する手段として, 我々はデータセンターネットワーク向け超高速レイヤ1 スイッチシステム:HOLST(High-speed optical layer 1 switch system for time slot switching based optical data center networks) の研究開発を行っている. 本稿では, HOLST のネットワークアーキテクチャにおいて, 時分割多重により光回線を共有することでトラフィックを最大限収容可能になるよう, PLZT 光スイッチに接続するラック群を導出する手法を考案した. 想定するトラフィックモデルにおいてシミュレーションを行った結果, ヒューリスティックアルゴリズムはおよそ0.8 秒の実行時間でラック群の組み合わせ探索を行い, 線形計画法による組み合わせ最適解と同等のトラフィック収容性能を発揮した.

Optically interconnected resource pool architecture for future backbone network with service scalability (Invited)

YAMANAKA NAOAKI, Satoru Okamoto, Kodai Yarita, Kazuo Sugai, Takayuki Muranaka

International Conference on Computing, Networking and Communications (ICNC2018) (Maui, Hawaii, USA) ,

2018.03

Oral presentation (general)

Service scalability is one of the key issue for future networks. For this, we propose new optical interconnected service function pool architecture having flexibility and high-efficiency. The service scalability is a feature which can create new services with combination of multiple functions. In addition, some functions must be realized by VLSI, FPGA, and software (i.e. NFV) according to their required performance. Software based flexible functions has some advantages that service throughput can be changed by control VM performance. Combination of multiple functions are using by optical interconnection that can relax distance and capacity restrictions among functions that realized by different technologies. In this paper, we propose a resource pool architecture that all functional resources in the network are called "resource pool". To create the service, proper resources are selected and interconnected by the optical interconnection. In addition, some simulation and prototype study results are also described. The proposed architecture is useful for future backbone networks.

QoS Guaranteed Virtual Network Function Assignment using the Biological Attractor Selection

Chiaki Hara,Mashito Mikuni,Kodai Yarita,Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (南種子町商工会館（鹿児島県）) ,

2018.03

Oral presentation (general)

ネットワークの機能を仮想化するネットワーク機能仮想化(NFV)の動きが高まり, ユーザの契約状況に応じて適切なネットワーク機能を経由するように経路を制御するサービスファンクションチェイニング(SFC)の研究がなされてきた. SFCにおける仮想ネットワーク機能(VNF)の配置問題において, 動的なチェイン要求の発生という環境変動に対しQoS保証を行うために, すべてのチェインを再構成し直すのは, サービスの中断などオーバヘッドが大きくなるため, VNFの移動回数を最小化する必要がある. ゆらぎ制御は, 生物の脳や生態に共通してみられる制御方式で, 準最適ではあるが, 環境変動に対して適応的に動作可能, また, 局所的な情報を用いることで制御が容易となる手法である. 本論文では, 環境変動に適応的に, またQoSを保証しつつ, かつVNFの移動回数を削減するようVNFの配置問題を解くため, ゆらぎ制御を用いる手法を提案する.

Data-center network (DCN) architectures with Reduced Power Consumption

Satoru Okamoto, Yukihiro Imakiire, Masayuki Hirono, YAMANAKA NAOAKI

20th Annual Conference Net-Centric 2017 (Arlington, USA) ,

2018.01

Oral presentation (general)

Optical interconnect edge/center cloud network for supporting autonomous vehicle application

YAMANAKA NAOAKI, Andrea Fumagalli, Eiji Oki, Takehiro Sato, Malathi Veeraraghavan, Satoru Okamoto

20th Annual Conference Net-Centric 2017 (Arlington, US) ,

2018.01

Oral presentation (general)

Design of Address Assignment for Multi-Domain Photonic L2 Network

Kodai Yarita, Takehiro Sato, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (工学院大学新宿キャンパス（東京都）) ,

2017.11

Oral presentation (general)

In increasing communication traffic and diversifying services, progress of photonic networks and nodes are required. As a solution to that, Smart Photonic Networking (SPN) has been proposed. In the SPN, A new layer 2 specialized for transport and correspond to wide area and multi-domains is required, that is called Photonic Layer 2. For the Photonic Layer 2, it is required to simplify routing by integrating multi-domains and address aggregation. Therefore, it is necessary to construct a new address structure and resolve address without using broadcast. In this paper, we report the result of the address structure design for supporting multi-domains in the Photonic Layer 2.

First-time Demonstration of Automatic Service Restoration by Using Inter-Central-Office OLT handover and Optical Path Switching in Metro-Access Network

Takuya Kanai, Yumiko Senoo, Kota Asaka, Jun Sugawa, Hideaki Tamai, Hiroyuki Saito, Naoki Minato, Atsushi Oguri, Seiya Sumita, Takehiro Sato, Nobuhiko Kikuchi, Shun-ichi Matsushita, Takehiro Tsuritani, Satoru Okamoto, YAMANAKA NAOAKI, Ken-ichi Suzuki, Akihiro Otaka

43rd European Conference on Optical Communication (ECOC 2017) (Gothenburg, Sweden) ,

2017.09

Oral presentation (general)

Hadoop-based Application Triggered Automatic Flow Switching in Electrical/Optical Hybrid Data-Center Network

Masayuki Hirono, Wataru Muro, Shu Sekigawa, Takehiro Sato, Satoru Okamoto, YAMANAKA NAOAKI

43rd European Conference on Optical Communication (ECOC 2017) (Gothenburg, Sweden) ,

2017.09

Oral presentation (general)

A Proposal of the Electrical Label Version Frame Structure for Photonic Layer-2 Networks

Satoru Okamoto, Kodai Yarita, Takehiro Sato, YAMANAKA NAOAKI

IEICE Society Conference (東京都市大学　世田谷キャンパス（東京）) ,

2017.09

Oral presentation (general)

通信トラヒックの増大及び, 通信サービスの多様化に対応するためのフォトニックネットワーク及びノードの進展が求められており, 解決策としてスマートフォトニックネットワーキング(SPN) が提案されている. SPNでは, トランスポートに特化し, 広域・マルチドメンに対応した新たなレイヤ2 (光L2) が求められている. 本稿では, 光L2網における電気ラベル版フレーム構成を検討した結果を報告する.

Processing Load Balancing Method for Home Gateway Internet of Things Platform

Yosuke Iwasaki, Jun Matsumoto, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Network Systems (北海道大学) ,

2017.07

Oral presentation (general)

近年のIoT(Internet of Things)の普及により, IoTデバイスの数が急激に増加している. その結果IoTサービスの処理負荷が増加している. 従来のIoTはシステムが垂直統合されており, 高い技術力とコストを必要としていた. また, 従来のIoTプラットフォームではデータセンタの処理負荷が膨大であり, リアルタイム性に欠けるという問題がある. そこで, 我々は新たに高いスケーラビリティと柔軟性を持つ水平統合型のIoTプラットフォームを提案する. 提案するIoTプラットフォーム上ではHGW(Home Gateway)がIoTサービスプログラムであるバンドルをライブマイグレーションし, 処理負荷分散を行う. ライブマイグレーションを行う際にIoTデバイスとバンドル間の遅延を小さくするために, ネットワーク距離が近いHGWを探索する手法が必要である.

Hadoop Triggered Opt/Electrical Data-Center Orchestration Architecture for Reducing Power Consumption

Akira Yamashita, Wataru Muro, Masayuki Hirono, Takehiro Sato, Satoru Okamoto, YAMANAKA NAOAKI, Malathi Veeraraghavan

19th International Conference on Transparent Optical Networks (ICTON2017) (Girona, Catalonia, Spain) ,

2017.07

Oral presentation (general)

In this paper, a data-center network (DCN) system that distinguishes Hadoop job types and allocates optical/electrical circuits to data flows depending on the types automatically is proposed. The proposed system calculates the predicted shuffle value (PSV) of the Hadoop job and determines which type of flow is allocated by comparing the PSV and the threshold value. The PSV can be calculated from a part of the input data based on the shuffle ratio, which is known to have a relationship to the heaviness of the shuffle phase of the Hadoop job. The threshold of PSV can be dynamically changed according to the network load condition to exploit the optical circuit efficiently. By orchestrating the DCN and the Hadoop system, the proposed system achieves the reduction of power consumption. In this study, the orchestration part of the proposed DCN system is implemented and the feasibility of switching data flows between optical and electrical circuits is verified.

A Two-Layer Network Orchestrator Offering Trustworthy Connectivity to a ROS-Industrial Application

Behzad Mirkhanzadeh, Chencheng Shao, Ali Shakeri, Takehiro Sato, Miguel Razo-Razo, Marco Tacca, Andrea Fumagalli, YAMANAKA NAOAKI

19th International Conference on Transparent Optical Networks (ICTON2017) (Girona, Catalonia, Spain) ,

2017.07

Oral presentation (general)

This paper describes an experiment carried out to demonstrate robustness and trustworthiness of an orchestrated two-layer network test-bed (PROnet). A Robotic Operating System Industrial (ROS-I) distributed application makes use of end-to-end flow services offered by PROnet. The PROnet Orchestrator is used to provision reliable end-to-end Ethernet flows to support the ROS-I application required data exchange. For maximum reliability, the Orchestrator provisions network resource redundancy at both layers, i.e., Ethernet and optical. Experimental results show that the robotic application is not interrupted by a fiber outage.

Demand Response Minimizing the Impact on the Consumers' Utility Considering Forecast Error on Renewable Energy Resource

Yuya Taniguchi, Ryo Kutsuzawa, Akira Yamashita, Jun Matsumoto, YAMANAKA NAOAKI

23rd IEEE International Symposium on Local and Metropolitan Area Networks (LANMAN 2017) (Osaka, Japan) ,

2017.06

Oral presentation (general)

In the smart grid, which is a new generation grid integrated with bidirectional communication and advanced information technology, it is supposed that the number of energy suppliers will increase because many renewable resources will be connected to the grid. The increase in the number of suppliers that use renewable energy resources introduces new challenges in scheduling and dispatching controllable resources to control the load of the power grid in the system. By using the pricing method that maximizes social welfare, consumers/suppliers can determine the optimal power consumption/generation that maximizes own welfare. However, when a forecast error of renewable energy output occurs, the gap between the total power consumption and generation causes unless consumers decrease power consumption from the optimal consumption. Decreasing consumers' power consumption might lower their utility.

Cache retention time change method to reduce address resolution response time in wide area layer 2 network

Kodai Yarita, Yusuke Nakajima, Akira Yamashita, Jun Matsumoto, Satoru Okamoto, YAMANAKA NAOAKI

23rd IEEE International Symposium on Local and Metropolitan Area Networks (LANMAN 2017) (Osaka, Japan) ,

2017.06

Oral presentation (general)

In wide area Layer 2 (L2) networks, there is a problem that broadcast packets for address resolution fill up link capacities. As a result, address resolution using Address Resolution Protocol (ARP), which uses broadcasts, cannot be used in wide area L2 networks. A conventional research has proposed an architecture using Distributed Hash Table (DHT) and ARP cache for reducing broadcasts. However, since this architecture uses simple Least Recently Used (LRU) method for caching, some packets may be discarded because of continuous cache misses which require long address resolution response time. Therefore, we propose a cache retention time change method considering address resolution response time. In addition, we also propose cache insertion position determination methods based on several ideas. Finally, we evaluate the effectiveness of the proposed method.

HOLST:Architecture design of energy-efficient data center network based on ultra high-speed optical switch

Masayuki Hirono, Takehiro Sato, Jun Matsumoto, Satoru Okamoto, YAMANAKA NAOAKI

23rd IEEE International Symposium on Local and Metropolitan Area Networks (LANMAN 2017) (Osaka, Japan) ,

2017.06

Oral presentation (general)

Recently, the energy consumption in data centers is increasing. Introducing optical circuit to the inter-rack communication is considered as an effective solution. The authors are working on the research and development of the High-speed Optical Layer 1 Switch system for Time slot switching based optical data center networks (HOLST). We focused on Plomb Lanthanum Zirconate Titanate (PLZT) optical switch that performs nano seconds switching time. In this paper, several ideas on how to connect PLZT optical switches and Micro Electro Mechanical Systems (MEMS) optical switches, the composing modules of the HOLST, are proposed to design network architecture and evaluated in order to compare and consider power saving effect. The result of the numerical simulation shows that the proposal architecture achieves 50% energy consumption reduction than the conventional architecture.

Expected Capacity Guaranteed Routing Method based on Failure Probability of Links

Shu Sekigawa, Eiji Oki, Takehiro Sato, Satoru Okamoto, YAMANAKA NAOAKI

23rd IEEE International Symposium on Local and Metropolitan Area Networks (LANMAN 2017) (Osaka, Japan) ,

2017.06

Oral presentation (general)

In a high-speed backbone network, the failure of a network link may cause large data losses, so it is necessary to reserve spare network resources for faster recovery. The conventional protection methods to reserve backup routes do not consider the failure probability of each network link, so the same amount of network resources for the backup route are needed regardless of the failure probability of network links. This leads a decrease in the number of connections that can be accepted into the network. This paper proposes a routing and capacity allocation method that guarantees the expected value of allocated capacity. We formulate a mixed integer liner programming model for the proposed method. We conduct simulations to study the advantage of the expected capacity guaranteed routing over the conventional routing method in terms of bandwidth blocking probability. The results show that the proposed method reduces the bandwidth blocking probability to about 1/3 as compared to that of the conventional path protection method.

Hierarchical Address Resolution Architecture with Distributed Hash Table in Wide Area Layer 2 Network

Kodai Yarita, Yusuke Nakajima, Akira Yamashita, Jun Matsumoto, Satoru Okamoto, YAMANAKA NAOAKI

13th International Conference on IP+Optical Network (iPOP2017) (Kawasaki, Japan) ,

2017.06

Oral presentation (general)

In order to respond to the rapidly increasing traffic and the diversification of communication services in recent years, the Photonic Layer 2 (L2) network attracts attention. The aim of the photonic L2 network is providing various services on a common photonic L2 with high-speed transmission by light paths. A wide area L2 network assuming a carrier network capable of accommodating one million users is considered as one of the services provided by the photonic L2 network. In wide area L2 networks, however, there is a problems that broadcast packets for Address Resolution Protocol (ARP) fill up link capacities due to the enormous number of users and packet losses due to buffer overflow by accumulation of long address resolution time. In this paper, we propose hierarchical address resolution architecture with Distributed Hash Table (DHT) in wide area L2 network to reduce broadcast, and caching method which based on the retention time to reduce address resolution time in the proposed architecture.

An SDN-Based WAN Scavenger Service for High-Speed Data Transfers

Fatma Alali, Sourav Maji, Malathi Veeraraghavan, YAMANAKA NAOAKI

13th International Conference on IP+Optical Network (iPOP2017) (Kawasaki, Japan) ,

2017.06

Oral presentation (general)

Demonstration of Remote Control of an Industrial Robot by Jointly Employing SDN-based Optical Transport Networks and Edge Compute Node

Noboru Yoshikane, Takehiro Sato, Satoru Okamoto, Takaya Miyazawa, Takamitsu Ohshima, Chihiro Yokoyama, Yoshifumi Sumida, Hidetsugu Sugiyama, Masatake Miyabe, Toru Katagiri, Naoki Kakegawa, Shuichi Matsumoto, Yoshinori Ohara, Ikuo Satou, Akihiro Nakamura, Sota Yoshida, Kenji Ishii, Soichiro Kametani, Takehiro Tsuritani, Hiroaki Harai, Chencheng Shao, Marco Tacca, Andrea Fumagalli, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (機械振興会館（東京都港区）) ,

2017.04

Oral presentation (invited, special)

This paper introduces the remote control of an industrial robot performing surface blending by using SDN-based optical transport networks. The SDN orchestrator enables the industrial robot located on the production floor and the robot control system located in the cloud/edge network to jointly and successfully carry out an unstructured task while minimizing both data transfer latency and volume across the transport network. Finally, the paper shows experimental validation of the proposed system.

A Study on Routing Techniques for Realizing an Optical Ad Hoc Communication in the Elastic Lambda Aggregation Network

Takehiro Sato, Yoshihiro Isaji, Satoru Okamoto, Naoaki Yamanaka

The 2017 IEICE General Conference (名城大学　天白キャンパス（名古屋市）) ,

2017.03

Oral presentation (general)

次世代光メトロ・アクセス統合型ネットワーク「エラスティックλアグリゲーションネットワーク（EλAN）」が提案されている. EλANにおいて大規模災害時の接続性を確保するために, アクティブ型のOptical Distribution Network (ODN)を活用し, 通信途絶に陥ったOptical Network Unit (ONU)が1台以上のRemote ONU (R-ONU)を経由して生存Optical Line Terminal (OLT)まで通信を確立する光アドホック通信が提案されている. 本稿では, R-ONUが隣接ONU群内のR-ONUを発見する際のルーチング手法に関して検討を行う.

QoS and Power-saving for Virtual Programmable Photonic Edge

Jun Matsumoto, Kodai Yarita, Takehiro Sato, Satoru Okamoto, Naoaki Yamanaka

The 2017 IEICE General Conference (名城大学　天白キャンパス（名古屋市）) ,

2017.03

Oral presentation (general)

Proposal of the shuffle heavy task finding scheme in Hadoop

Wataru Muro,Masayuki Hironi,Jun Matsumoto,Takehiro Sato,Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (大濱信泉記念館（石垣島）) ,

2017.03

Oral presentation (general)

In recent years large-scale parallel distributed processing by clustering such as Hadoop is executed frequently in the data center. Depending on the job(processing content), the network load is large and an increase in power consumption is regarded as a problem. The authors are working on the reserch and have found a discriminate jobs with such a heavy network load. With using it, we develop the thereby reducing the power consumption Data Center Network. In this paper, we describe the method of determining the network load and the operation method of the proposed architecture, and then evaluated the proposed architecture in terms of power comsumption. The result of the experiment shows that the proposed architecture achieves drastically higher energy consumption reduction than it was.

Wavelength Reservation Method for Optical Ad Hoc Networking in the Elastic Lambda Aggregation Network

Yoshihiro Isaji, Takehiro Sato, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (大濱信泉記念館（石垣島）) ,

2017.03

Oral presentation (general)

In the elastic lambda aggregation network (EλAN), access paths are flexibly reconfigured by the active optical distribution network (ODN) when a network failure occurs. It is expected that an optical line terminal (OLT) of another central office (CO) recovers the connectivity of optical network units (ONU). The optical ad hoc networking has been proposed as a method to overcome the transmission distance limitation between the OLT and the ONU in the case of a large-scale disaster in which a large number of COs are out of service. In this paper, we propose the wavelength reservation method to realize the optical ad hoc networking. By computer simulation, the optical ad hoc networking applying the proposed wavelength selection method achieves ONU group rescue rate higher than 20% the restoration method when the failure rate of the network device is 40%.

Experiment of the Restoration Method and the TDMA-based OLT Sharing Method in the Elastic Lambda Aggregation Network

Yoshihiro Isaji, Yusuke Nakajima, Takehiro Sato, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network, Student Workshop (大濱信泉記念館（石垣島）) ,

2017.03

Oral presentation (general)

In the elastic lambda aggregation network (EλAN), access paths are flexibly reconfigured by the active optical distribution network (ODN) when a network failure occurs. It is expected that an optical line terminal (OLT) of another central office (CO) recovers the connectivity of optical network units (ONU). However, there is an upper limit on the number of ONUs that a single OLT can accommodate. Therefore, some of ONUs cannot be recovered in a large-scale disaster where many COs become out of service. In order to overcome this limit, the time division multiple access (TDMA)-based logical OLT sharing method among ONU groups has been proposed. The proposed method maintains connectivity of the excessive numbers of ONUs from a single OLT. In this paper, we report the experiment results of the restoration and the TDMA-based OLT sharing method conducted on the EλAN prototype system.

Demand Response Minimizing the Impact on the Consumers' Utility Towards Renewable Energy

Ryo Kutsuzawa, Naoya Takemura, Akira Yamashita, Jun Matsumoto, Makoto Tanaka, YAMANAKA NAOAKI

IEICE Technical Report on Network Systems (沖縄県中頭郡読谷村) ,

2017.03

Oral presentation (general)

Low-Power Edge Computing over Virtual Programmable Photonic Edge

Jun Matsumoto, Takehiro Sato, Satoru Okamoto, NAOAKI YAMANAKA, Kazuo Sugai, Takayuki Muranaka

IEICE Technical Report on Network System (NS) (沖縄県中頭郡読谷村) ,

2017.03

Oral presentation (general)

The concept of Programmable Photonic Edge (PPE) has been proposed which uses reconfigurable communication processers composed of multiple hardware such as CPU, FPGA, and LSI. This paper proposes virtualization of PPE for the sake of high utilization rate of these hardware as resource pool. We formulate the optimization problem of hardware resource allocation for edge computing in terms of QoS and power consumption, and clarify the requirements of the algorithm development with the performance analysis of two simple algorithms as basis examination.

マルチキャリアSoftware-Defined Transport Networkにおけるオーケストレータ間インタフェースの実装及び接続検証

井上義章, 吉兼昇, 松本隼, 岡本聡, 山中直明

IEICE Technical Report on Network System (NS) (沖縄県中頭郡読谷村) ,

2017.03

Oral presentation (general)

In the Software-Defined Transport Network (SDTN), there are some problems in a conventional approach which is controlled by a single top orchestrator in case of multi-carrier environment. Therefore, we propose a scale-out type SDTN approach based on assumption that each carrier has its own top orchestrator in the future, and also define an Orchestrator-to-Orchestrator Interface taking into account the confidentiality of information between carriers. We report that the effectiveness of the proposed approach is confirmed compared to the conventional SDTN approach by an evaluation, and the feasibility is also verified by implementation of the proof of concept system.

Logical optical line terminal technologies towards flexible and highly reliable metro and access integrated networks

Satoru Okamoto, Takehiro Sato, YAMANAKA NAOAKI

SPIE Photonics West 2017 (The Moscone Center, San Francisco, California, United States) ,

2017.01

Oral presentation (general)

A study on network control function to assist IoT devices

Naoya Takemura, Satoru OKAMOTO, YAMANAKA NAOAKI, Naoki HIGO, Yoshiko SUEDA, and Arata KOIKE

IEICE Technical Report on Network Systems (鹿児島市町村自治会館) ,

2017.01

Oral presentation (general)

Enhancing quality of service that perceived by customers is an important measure for web service providers. Major web service providers create their infrastructure by locating several computing resources inside the Internet to assist its quality enhancement. For services using Internet of Things (IoT), there are strong interests in controlling IoT devices through network. We propose network assisting functions and supporting architecture for such services. In our proposal, we spin off parts of IoT device or server functions and locate them on network located computing resources. In this report, we compare and evaluate our approach with other method using real devices and virtual network test bed.

A Task Allocation Scheme in Hadoop Clusters Considering Computational and Network Resources for Wide Area Networks

Tomohiro MATSUNO, Bijoy CHAND CHATTERJEE, Nattapong KITSUWAN, Eiji OKI, Malathi VEERARAGHAVAN, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (KDDI総合研究所（ふじみ野市, 埼玉）) ,

2016.11

Oral presentation (invited, special)

Hadoop has swiftly been accepted in both industry and academia in order to offer enormous storage for any kind of data, massive processing power and the capability to manage virtually jobs. This paper designs a Hadoop system, which considers both slave server's processing capacity and network delay for wide area networks in order to reduce the job processing time. The demonstrated testbed results esignate that the task allocation scheme in our designed Hadoop system is effective.

HOLST:Architecture design of energy-efficient datacenter network based on ultra high-speed optical switch

Masayuki HIRONO, Takehiro SATO, Jun MATSUMOTO, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (KDDI総合研究所（ふじみ野市, 埼玉）) ,

2016.11

Oral presentation (invited, special)

Recently, the energy consumption in data centers is increasing. Introducing optical circuit to the inter-rack communication is considered an effective solution. The authors are working on the research and development of the High-speed Optical Layer 1 Switch system for Time slot switching based optical data center networks (HOLST). In this paper, several ideas on how to connect PLZT optical switches and MEMS optical switches, the composing modules of the HOLST, are proposed and evaluated in order to design the optimal architecture. The result of the numerical simulation shows that the proposed architecture achieves significantly higher energy consumption reduction than the conventional architecture.

Demand Response Minimizing the Impact on the Consumers’ Utility Towards Renewable Energy

Ryo Kutsuzawa, Akira Yamashita, Naoya Takemura, Jun Matsumoto, Makoto Tanaka,YAMANAKA NAOAKI

The 7th IEEE International Conference on Smart Grid Communications (SmartGridComm 2016) (Sydney, Australia) ,

2016.11

Oral presentation (general)

Design of Multi-Dimensional Search Queries for Efficient Discovery of Suppliers in the Smart Grid

Akira Yamashita, Ryo Kutsuzawa, Naoya Takemura, Jun Matsumoto,YAMANAKA NAOAKI

The 7th IEEE International Conference on Smart Grid Communications (SmartGridComm 2016) (Sydney, Australia) ,

2016.11

Oral presentation (general)

Remote control experiments of an industrial robot using two distributed robot controllers

Takehiro Sato, Chencheng Shao, Jorge Nicho, Noboru Yoshikane, Satoru Okamoto, YAMANAKA NAOAKI, Miguel Razo, Marco Tacca, Andrea Fumagalli

19th Annual International Conference on Next Generation Internet and Related Technologies (Net-Centric 2016) (Arlington, VA, USA) ,

2016.10

Oral presentation (general)

A High-Performance OpenFlow Software Switch

Reze Rahimi, Malathi Veeraraghavan, Yoshihiro Nakajima, Hirokazu Takahashi, Yusuke Nakajima, Satoru Okamoto, YAMANAKA NAOAKI

The 2016 Internet2 Technology Exchange (Miami, FL, USA) ,

2016.09

Oral presentation (general)

Experimental Report of Simultaneous Migration of Logical OLTs in Elastic Lambda Aggregation Network

Takehiro Sato, Yoshihiro Isaji, Yusuke Nakajima, Yukihiro Imakiire, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Society Conference (北海道札幌市北海道大学) ,

2016.09

Oral presentation (general)

Proposal of the Programmable Photonic Edge with Virtual Reconfigurable Communication Processors

Satoru Okamoto, Jun Matsumoto, Takehiro Sato, YAMANAKA NAOAKI

IEICE Society Conference (北海道札幌市北海道大学) ,

2016.09

Oral presentation (general)

日本の通信トラヒックは, 年率約30%で増加を続けている. このため, 400 Gbps級のインタフェースを有する大容量L1/L2/L3ノードの導入が必要となる. また, 通信サービスの多様化も進展しており, 各サービスの多様なプロダクトライフサイクルに対応することが重要である. 上記課題への対応として, スマートフォトニックネットワーキング(SPN)が提案されている. 本稿では, SPN実現を目指して, リソースプール型の仮想通信処理プロセッサ(VRCP)を提案し, VRCPを用いたSPN向けプログラマブル光エッジ(PPE)構成を提案する.

Proposal of the Photonic Programmable Node Architecture using Virtual Reconfigurable Communication Processors

Satoru Okamoto, Jun Matsumoto, Takehiro Sato, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (北海道函館市 KKR函館) ,

2016.09

Oral presentation (general)

The ACTION Project - Application coordinating with Transport, IP and Optical Network -

YAMANAKA NAOAKI, Satoru Okamoto, Yukihiro Imakiire, Mai Arase, Eiji Oki, Malathi Veeraraghavan, Andrea Fumugari

IEICE Technical Report on Photonic Network (北海道函館市 KKR函館) ,

2016.09

Oral presentation (general)

The ACTION project: Application Coordinating with Transport, IP and Optical Networks(Invited)

YAMANAKA NAOAKI, Satoru Okamoto, Yukihiro Imakiire, Mai Arase, Eiji Oki, Malathi Veeraraghavan

ICTON2016 (Trento, Italy) ,

2016.07

Oral presentation (invited, special)

Internet traffic volume continues to increase at a high rate every year. To handle unexpected traffic surges, link failures and growth in traffic volume, network link capacities are typically over-provisioned. To reduce the extent of over-provisioning, we proposed an application and network coordinated multi-layer architecture called ACTION. Application QoE (Quality of Experience) are translated into network QoS requirements, and the multi-layer architecture is leveraged to meet these QoS requirements. To determine the quality experienced by application flows, Hadoop logs are communicated to the network controller, and edge devices are programmed to detect elephant flows automatically. Virtual networks that offer applications flows their required QoS are realized by configuring physical network switches to achieve the required QoT (Quality of Transport). ACTION is a multi-QoE, application-centric, energy-efficient network architecture that leverages flexible elastic optical network technologies. This project is supported by both NSF, USA, and NICT, Japan, under the JUNO (Joint Japan-US Network Opportunity) program. This paper provides a brief overview of the project.

First Demonstration of Geographically Unconstrained Control of an Industrial Robo t by Jointly Employing SDN-based Optical Transport Networks and Edge Compute

Noboru Yoshikane, Takehiro Sato, Yoshihiro Isaji, Chencheng Shao, Marco Tacca, Satoru Okamoto, Takaya Miyazawa, Takamitsu Oshima, Chihiro Yokoyama, Yoshihumi Sumida, Hidetsugu Sugiyama, Masahiro Miyabe, Toru Katagiri, Naoaki Kakegawa, Shuichi Matsumoto, Yoshinori Ohara, Ikuo Sato, Akihiro Nakamura, Sota Yoshida, Kenji Ishii, Soichiro Kametani, Jorge Nicho, Jonathan Meyer, Shaun Edwards, Paul Evants, Takehiro Tsuritani, Hiroaki Harai, Miguel Razo, Donald Hicks, Anfrea Fumagalli, YAMANAKA NAOAKI

The 21st OptoElectronics and Communications Conference / International Conference o n Photonics in Switching 2016 (Niigata, Japana) ,

2016.07

Oral presentation (general)

Proposal of an Orchestrator-to-Orchestrator Interface using the Control Orchestration Protocol

Yoshiaki Inoue, Jun Matsumoto, Satoru Okamoto, YAMANAKA NAOAKI

The 21st OptoElectronics and Communications Conference / International Conference on Photonics in Switching 2016 (OECC/PS 2016) (Niigata, Japan) ,

2016.07

Oral presentation (general)

Dynamic Optical Circuits in Datacenter Networks for Shue-Heavy Hadoop Applications

Xiaoyu Wang, Malathi Veeraraghavan, Eiji Oki, Satoru Okamoto, YAMANAKA NAOAKI

12th International Conference on IP+Optical Networks (iPOP 2016) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Challenge to realize an Orchestrator-to-Orchestrator Interface using the Control Orchestration Protocol

Yoshiaki Inoue, Jun Matsumoto, Satoru Okamoto, YAMANAKA NAOAKI

12th International Conference on IP+Optical Networks (iPOP 2016) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Task Allocation Scheme for Heterogeneous Hadoop Clusters

Tomohiro Matsuno, Bijoy Chand Chatterjee, Eiji Oki, Malathi Veeraraghavan, Satoru Okamoto, YAMANAKA NAOAKI

The 2016 IEEE High Performance Switching and Routing (HPSR) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Source-based Wavelength-path Protection Scheme with Tree-shaped Backup-path Configuration in WDM Networks

Masahiro Hayashitani, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

The 2016 IEEE High Performance Switching and Routing (HPSR) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

—This paper proposes a source-based high-speed
wavelength-path protection scheme configuring a tree-shaped
backup path in WDM networks. In the proposed scheme, a
failure-detecting node on a primary path starts protection by
sending a failure notification to a source node of the primary
path through the tree-shaped backup path. Intermediate nodes
on the backup path and the source node which receive the failure
notification switch to the backup path autonomously. Therefore,
the proposed scheme provides high-speed protection. The simulation
results revealed that the proposed scheme reduces the
failure-recovery time compared with the conventional protection schemes.

Power Matching Method in Smart Grid Considering User Satisfaction by PIAX Platform

Kosuke Asami, Akira Yamashita, Ryo Kutsuzawa, Naoya Takemura, Jun Matsumoto, Hidetoshi Takeshita, YAMANAKA NAOAKI

The 2016 IEEE High Performance Switching and Routing (HPSR) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Multi-Dimensional Search Overlay Network to Enable Flexible Search Queries in Smart Grid

Akira Yamashita, Ryo Kutsuzawa, Naoya Takemura, Jun Matsumoto, YAMANAKA NAOAKI

The 2016 IEEE High Performance Switching and Routing (HPSR) Workshop (Yokohama, Japan) ,

2016.06

Oral presentation (general)

A High-Performance OpenFlow Software Switch

Reze Rahimi, Malathi Veeraraghavan, Yoshihiro Nakajima, Hirokazu Takahashi, Yusuke Nakajima, Satoru Okamoto, YAMANAKA NAOAKI

The 2016 IEEE High Performance Switching and Routing (HPSR) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Software switches offer flexibility to service providers but potentially suffer from low performance. A software switch called Lagopus was implemented using Intel’s Data Plane Development Kit (DPDK), which offers libraries for highperformance packet handling. Prior work on software switches focused on characterizing packet forwarding throughput. In this work, we evaluated the impact of certain parameters and settings in Lagopus on application performance and studied packet drop rates. The importance of receive-thread packet classification for load balancing and to send delay-sensitive flows to a different worker thread from high-throughput flows was first demonstrated. Next, we showed that a loop-count variable used to control packet batching should be kept small in case link utilization is low. Finally, we showed that packet drop rate could be non-zero when the OpenFlow table size is large and packet arrival rate is high, and interestingly, the packet drop rate was higher with four worker threads than with a single worker thread. This implies a need for careful calibration and planning of the parameters of parallelization.

A Study on Open vSwitch Queues Toward Realizing a Multi-QoS Campus Network

Takehiro Sato, YAMANAKA NAOAKI, Hunter Werlla, Marco Tacca, Andrea Fumagalli

IEEE 17th International Conference on High Performance Switching and Routing (HPSR 2016) Workshop (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Adaptive Elastic Spectrum Allocation Based on Traffic Fluctuation Estimate in Flexible OFDM-based Optical Networks

Mirai Chino, Takahiro Miyazaki, Eiji Oki, Satoru Okamoto, YAMANAKA NAOAKI

High Performance Switching and Routing (HPSR) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Two-service Analytical Model for Partially-Shared Elastic Optical Link Spectrum

Joobum Kim, Shuyi Yan, Andrea Fumagalli, Eiji Oki, YAMANAKA NAOAKI

The 2016 IEEE High Performnce Switching and Routing (HPSR) (Yokohama, Japan) ,

2016.06

Oral presentation (general)

Proposal of the ad hoc networking method for the Elastic Lambda Aggregation Network (EλAN)

Satoru Okamoto, Takahiro Sekii, Yoshihiro Isaji, Naoaki Yamanaka

IEICE General Conference (福岡県　福岡市) ,

2016.03

Oral presentation (general)

Proposal of the remote optical network unit for realizing an optical ad hoc networking method in the Elastic Lambda Aggregation Network

Satoru Okamoto, Takahiro Sekii, Yoshihiro Isaji, Takehiro Sato, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (PN) (沖縄県　那覇市) ,

2016.03

Oral presentation (general)

Power Saving-oriented Data Center Optical Network Architecture Using PLZT Optical Switch

Masayuki Hirono, Yoshihiro Isaji, Yusuke Nakajima, Takehiro Sato, Satoru Okamoto, Hidetoshi Takeshita, NAOAKI YAMANAKA, Naoki Wakamiya

IEICE Technical Report on Photonic Network (PN) (沖縄県　那覇市) ,

2016.03

Oral presentation (general)

本論文では頻繁な経路変更に対応するために，光回線直結を用いるデータセンターアーキテクチャを対象に，10−9s 単位での切り替えが可能なPLZT Plomb Lanthanum Zirconate Titanate) 光スイッチを導入した光回線交換データセンターアーキテクチャを提案した．また，PLZT 光スイッチを用いた光回線交換通信を行うために，TDM(Time Division Multiplexing) 型光回線多重による帯域割り当てを提案した．計算機シミュレーションを用いて評価した結果，提案手法は従来手法のアーキテクチャと比較して光回線利用効率を
向上させ，消費電力を最大で45%削減することを示した．

Scalable Sensor Data Transaction Platform with Reliable Accounting

Naoya TAKEMURA, Ryo KUTSUZAWA, Akira YAMASHITA, Jun MATSUMOTO, NAOAKI YAMANAKA, Yoshiko SUEDA, and Arata KOIKE

IEICE Technical Report on Network System (NS) (宮崎県　宮崎市) ,

2016.03

Oral presentation (general)

Recently, the IoT (Internet of Things) is attracting a considerable attention. IoT is an idea of connecting all physical devices to the Internet and allowing them to communicate with each other in order to achieve mutual controls or to provide new services. In the future, it is expected that real-time data items acquired from various IoT sensors such as cameras and thermometers will be on the market. However, a real-time data transaction plat- form which supports fair and reliable billing is yet to be developed. MQTT (Message Queue Telemetry Transport) and WebRTC (Web Real-Time Communication) are two protocols considered eligible for use in IoT era. However, because MQTT adopts centralized architecture, the central server may suffer from large load due to the increase in the number of IoT devices or the size of each data item. On the other hand, WebRTC, which achieves scalability by supporting P2P transactions, has a problem with fair billing of participating users. Therefore, in this paper, we propose an IoT data transaction platform using extended WebRTC protocol which enables real-time transactions and fair billing of participating users.

Household Solar Power Output Prediction Services for Power Grid Stabilization in Smart Grid

Ryo KUTSUZAWA, Guillaume HABAULT, Naoya TAKEMURA, Akira YAMASHITA, Jun MATSUMOTO, Hidetoshi TAKESHITA, NAOAKI YAMANAKA

IEICE Technical Report on Information Network (IN) (宮崎県　宮崎市) ,

2016.03

Oral presentation (general)

In recent years, household solar panels are rapidly spreading in Japan, and it is one research issue to utilize unstable solar panel. Renewable energy is unstable. So the prediction of power generation amount by solar panels is very important. We propose a prediction service of household solar power output. There are many prediction methods for big solar power plants. However, there are no prediction methods for household solar power output within our investigation. We propose a prediction service for household solar power output. We show comparison between actual power and forecast and estimate the number of data for machine learning to mature.

Applicability Evaluation for Linked-Content Placement

Misato Kamio, Mirai Chino, Shoichi Nagata, Satoru Okamoto, NAOAKI YAMANAKA, Naoki Wakamiya

IEICE Technical Report on Photonic Network (PN) (兵庫県　神戸市産業振興センター) ,

2016.01

Oral presentation (general)

In Information-centric Networking (ICN) and Content-centric Networking (CCN), content placement is very important because the closer contents and users are, the higher their Quality of Service (QoS) will be when they request these contents. Furthermore, optimum linked-content placement can improve users QoS more and more. When a content is requested by a user, moving related contents i.e. linked-content closer to the user can improve the user’s QoS because the user is likely to request these contents as well. However, multiple-content placement optimization is proven to be NP-complete, and even finding a suboptimal solution often has high calculation complexity. On the other hand, biologically inspired attractor selection model utilizes random noises in order to solve complex problem with low calculation complexity. Therefore, we evaluated applicability of attractor selection model to solving a linked-content placement problem.

5Gを見据えたエラスティック光アグリゲーションネットワーク(EλAN)の研究開発

岡本聡, 竹下秀俊, 山中直明

PIF・PN研共催ナショナルプロジェクト特集講演会 (神奈川県　川崎市　K2キャンパス) ,

2016.01

Oral presentation (general)

Effective Parallel Algorithm for GPGPU-Accelerated Explicit Routing Optimization

Ko Kikuta, Eiji Oki, YAMANAKA NAOAKI, Nozomu Togawa, Hidenori Nakazato

IEEE 2015 Global Communications Conference, Exhibition and Industry Forum (GLOBECOM 2015) (San Diego, CA, USA) ,

2015.12

Oral presentation (general)

The recent development of network technologies that offer centralized control of explicit routes opens the door to the online optimization of explicit routing. For this kind of Traffic Engineering optimization, raising the calculation speeds by using multi-core processors with effective parallel algorithms is a key goal. This paper proposes an effective parallel algorithm for General purpose Programming on Graphic Processing Unit (GPGPU); its massively parallel style promises strong acceleration of calculation speed. The proposed algorithm parallelizes not only the search method of the Genetic Algorithm, but also its fitness functions, which calculate the network congestion ratio, so as to fully utilize the power of modern GPGPUs. Concurrently, each execution is designed for thread-block execution on the GPU with consideration of thread occupancy, local resources, and SIMT execution to maximize GPU performance. Evaluations show that the proposed algorithm offers, on average, a nine fold speedup compared to the conventional CPU approach.

An Analytical Model of Spectrum Fragmentation in a Two-Service Elastic Optical Link

Joobum Kim, Shuyi Yan, Andrea Fumagalli, Eiji Oki, YAMANAKA NAOAKI

IEEE 2015 Global Communications Conference, Exhibition and Industry Forum (GLOBECOM 2015) (San Diego, CA, USA) ,

2015.12

Oral presentation (general)

Elastic Optical Networks (EONs) enable optical circuits to be assigned distinct numbers of spectrum slices. Individual circuits can then be assigned an optimal number of slices to best match their target transmission rates. A well-known drawback of EONs is spectrum fragmentation and its resulting uneven blocking probability, which circuit requests experience when the available spectrum slices in the fiber are insufficient or not contiguous. Capturing this spectrum fragmentation problem analytically is a challenging problem. Not surprisingly, most of the existing studies at this time mainly use simulationbased techniques to quantify blocking probability in EONs. In this paper, the authors present a Markov Chain (MC) model that attempts to characterize the fragmentation problem in a simplified scenario, i.e., only two types of circuit services are allowed over a single fiber link. Despite its limited scope, this initial analytical effort is able to accurately capture the nonmonotonic behavior of the blocking probability in EONs for the first time.

A dynamic hybrid network design for enterprise access links

Xiaoyu Wang, Malathi Veeraraghavan, Maite Brandt-Pearce, Takahiro Miyazaki, YAMANAKA NAOAKI, Satoru Okamoto, Ion Posescu

IEEE 2015 Global Communications Conference, Exhibition and Industry Forum (GLOBECOM 2015) (San Diego, CA, USA) ,

2015.12

Oral presentation (general)

This paper proposes a new two-wavelength design for large-enterprise access links. The goal of this design is to lower power consumption and equipment costs without having a significant impact on performance. In our design, one wavelength is used as part of a lower-rate static circuit for general-purpose IP traffic, while the second wavelength is dynamically configured into a high-rate circuit for large dataset transfers whenever needed. A few provider-router ports are shared among a larger number of customers given that large dataset transfers are relatively infrequent. This leads to potential start-time delays, but results in significant power and cost savings. Using analytical models, we provide a quantitative power-and-cost comparison of our dynamic solution with the static always-on high-rate single-circuit solution used currently. The number of shared provider-router ports is kept large enough based on the number of customers to ensure that the probability of start-time delay exceeding a threshold is less than 1%.

SDN controlled Virtual OLT Migration trial over JGN-X testbed network

Yoshihiro Isaji, Takehiro Sato, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

18th Annual International Conference on Next Generation Internet and Related Technologies (SDN/MPLS 2015) (WASHINGTON MARRIOTT WARDMAN PARK, Washington D.C.,USA) ,

2015.11

Oral presentation (general)

Examination of Power Saving-oriented Path Reallocation Utilizing Advantage of Low Power Idle in Japan Photonic Networks

Yoshihiro Isaji, Yukihiro Imakiire, Takahiro Miyazaki, Eiji Oki, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (PN) (東京都　文京区　日本女子大) ,

2015.11

Oral presentation (general)

Multi- (layer, path, and resources) Dynamically Optimized Routing (MiDORi) network which aggregates traffic by Traffic Engineering (TE) and reduce power consumption by on / off of port-by-port of network equipments have been proposed. Energy Efficient Ethernet (EEE) to perform the power reduction of the link as a related study has been attracting attention in recent years, technology called Low Power Idle (LPI) is adopted as a mechanism for power saving techniques EEE. We consider a network power-saving technique by path re-allocation algorithm that takes into account the LPI power characteristics in Japan Photonic Networks(JPN) in this paper. It is a technique for reducing power consumption in the entire network by changing the path to a high link-usage link from a low link-usage link. In JPN models matching the Japanese geography information, we consider the comparison for conventional method and proposed method in terms of power consumption.

Resource Allocation Scheme for Hadoop in Campus Networks

Tomohiro Matsuno, Bijoy Chand Chatterjee, Satoru Okamoto, Eiji Oki, Malathi Veeraraghavan, YAMANAKA NAOAKI

The 21st Asia-Pacific Conference on Communications (APCC 2015) Latest Results Workshop (Kyoto University, Kyoto) ,

2015.10

Oral presentation (general), IEICE (Institute of Electronics, Information and Communication Engineers) Communications Society

On most campus networks, outdated computational resources are not used. This paper proposes a Hadoop-based resource
allocation scheme for leveraging these outdated resources.
The proposed scheme splits a computational job into tasks
using appropriate splitting ratios based on computer processing performance and network resource availability. We compare our resource allocation scheme with a conventional scheme, which divides a job equally without consideration of computer processing performance and network resource availability. Both experiments and simulations are used to compare our proposed scheme and the conventional scheme. Simulation results show that the proposed scheme outperforms the conventional scheme in terms of job execution time.

Network API for Energy-Aware Routing in Energy Efficient and Enhanced-type Data- centric Networking

Shoichi Nagata, Mirai Chino, Tetsuhiro Uchida, Shanming Zhang, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

The 21st Asia-Pacific Conference on Communications (APCC 2015) Latest Results Workshop (Kyoto University, Kyoto) ,

2015.10

Oral presentation (general), IEICE (Institute of Electronics, Information and Communication Engineers) Communications Society

In present Internet, users obtain content by appointing IP address because network architecture is “host-to-host”. However, new network architecture of “user-to-data” is needed because users need data, not IP address. Then we have proposed Energy Efficient and Enhance-type Data-centric Networking (E3-DCN) architecture to implement content-oriented network. E3- DCN realizes Data-centric Networking and to reduce power consumption effectively. In this paper, we implement Network Application Programming Interface (API) which has been proposed in E3-DCN to reduce power consumption effectively. We simulate to show effectiveness of Network API and show reduction of power consumption.

Demand and Supply Matching Method in Smart Grid by Distributed P2P Communication

Kosuke Asami, Mitsuyasu Endo, Ryo Kutsuzawa, Soushi Yamamoto, Kenya Takashima, Hidetoshi Takeshita, YAMANAKA NAOAKI

The 21st Asia-Pacific Conference on Communications (APCC 2015) Latest Results Workshop (Kyoto University, Kyoto) ,

2015.10

Oral presentation (general), IEICE (Institute of Electronics, Information and Communication Engineers) Communications Society

In Smart Grid, renewable energy such as photovoltaic power and wind power has been rapidly introducing. Then, the power grid has been shifting from the tree 1:N structure with centralized power plants to the N:M structure with various kind of power resources. In this case, to realize matching control among N supply resources including unstable renewable energy and M consumers, the scalable real time matching method is necessary. In this paper, we propose a novel scalable real time matching algorithm to reduce the transmission loss by distributed P2P communication that is the P2P Interactive Agent eXtensions (PIAX) platform. Then, we show that the proposed method utilizing PIAX enables the real time matching and can reduce the transmission loss similar as centralized control method.

Task Allocation Scheme for Hadoop in Campus Network Environment

Tomohiro Matsuno, Bijoy Chand Chatterjee, Satoru Okamoto, Eiji Oki, Malathi Veeraraghavan, NAOAKI YAMANAKA

電子情報通信学会ソサイエティ大会 (宮城県　仙台市　東北大学) ,

2015.09

Oral presentation (general)

This paper proposes a resource allocation scheme for Hadoop in campus networks in order to maximize the performance in terms of processing time by utilizing the outdated computational resources. The proposed scheme splits the job with appropriate splitting ratios according to both computer processing performance and network resource availability. In the other words, the job is divided into different proportion of tasks and then they are assigned to slave servers according to both computer processing performance and network resource availability. The simulation results indicate that the proposed scheme is effective.

Adaptive Sub-carriers Allocation Based on Traffic Fluctuation Estimate in Elastic Optical Network

Mirai Chino, Takahiro Miyazaki, Eiji Oki, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (PN) (北海道　旭川市) ,

2015.09

Oral presentation (general)

Performance Evaluation of Span Power Control Scheme for Fast Optical Lightpath Provisioning in Multi-Core Fiber Networks

Eiji Oki, Bijoy Chand Chatterjee, Yamini Jayabal, Satoru Okamoto, YAMANAKA NAOAKI, Andrea Fumagalli

17th International Conference on Transparent Optical Networks (ICTON2015) (Budapest, Hungary) ,

2015.07

Oral presentation (general), Diamond Congress Kft

The activation time of optical lightpaths is adversely affected by the time that is required by automatic power control strategies to account for the newly added signal power. This limitation is particularly true when using multi-core erbium doped amplifiers. In order to overcome this shortcoming and shorten the lightpath activation time required, this paper evaluates the performance of a fiber span power control scheme based on the use of dummy wavelength signals. The introduced scheme suppresses a significant fraction of the average waiting time for lightpath provisioning in the network that does not make use of dummy wavelengths. Further, we observe that the blocking probability of the introduced scheme depends on the number of used dummy wavelengths per fiber span. In addition, we also observe that when the re-instantiating time of dummy wavelength is adequately lower than that of the holding time, the blocking probability of the introduced scheme is not affected.

The ACTION Project: Applications Coordinate with Transport, IP and Optical Networks

Andrea Fumagalli, Malathi Veeraraghavan, Eiji Oki, Satoru Okamoto, YAMANAKA NAOAKI

4th International Workshop on Trends in Optical Technologies (WTON) (Campinas, São Paulo, Brazil) ,

2015.05

Oral presentation (general), Unidade Embrapii CPqD

•Develop an Applications Coordinating with Transport, IP, and Optical Networks (ACTION) architecture
–by integrating four enabling technologies
–by operating links at higher utilization while meeting the four challenges of high-utilization operation
• Why operate at high utilization: the network will need fewer powered-on links, and hence the network will consume smaller levels of energy (power) to move the same number of information bits (bits/sec)
–analogy: flying a half-empty large airplane!

M2M/IoT時代に向けた情報指向ネットワークにおけるPull/Push型移動通信方式の評価

Daisuke Matsubara,Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Information-centric Networking (ICN) (東京大学本郷キャンパス、　東京) ,

2015.05

Oral presentation (general)

High Speed 100GE Adaptive Link Rate Switching for Energy Consumption Reduction

Takahiro Miyazaki, Ion Popescu, Mirai Chino, Xiaoyu Wang, Kunitaka Ashizawa, Satoru Okamoto, Malathi Veeraraghavan, YAMANAKA NAOAKI

2015 International Conference on Optical Network Design and Modeling (ONDM) (Pisa, Italy) ,

2015.05

Oral presentation (general), Scuola Superiore Sant'Anna (SSSA), and Consorzio Nazionale Interuniversitario per le Telecomunicazioni (CNIT)

Energy efficiency is becoming a critical issue in highspeed networks. 100 Gb/s Ethernet was standardized in 2010, and several papers have been published on power consumption reduction methods using Adaptive Link Rate (ALR) technology. ALR reduces power consumption by adapting link speed to traffic demand. However, rate switching time is a parameter that impacts the level of power reduction achievable with current ALR technologies. In this paper, we propose a new energy-efficient architecture for 100 Gb/s Ethernet. The rate switching time is reduced using coherent lightwave transmission technologies. We use simulations to evaluate how the proposed architecture impacts energy efficiency, switching time and network performance.

Dynamic Layer-1 WAN Access Architecture for Large Enterprises

Xiaoyu Wang, Malathi Veeraghavan, Takahiro Miyazaki, Ion Popescu, Satoru Okamoto, YAMANAKA NAOAKI

The 11th International Conference on IP + Optical Network (iPOP2015) (Naha, Okinawa, Japan) ,

2015.04

Oral presentation (general), PIL, ISOCORE USA and Okinawa Open Laboratory (OOL)

Using an SDN controller, a Layer-1 optical circuit can be established on a dynamic basis to connect the two switch ports from a given customer (e.g., Switch S1 of Customer 1) to the ports of a provider router, e.g., RP1. We expect this solution to consume lower power because the IP routers in customer networks can use lower-rate WAN-access links for everyday traffic (e.g., 40GE as shown in the figure), and the number of 40GE interfaces required in provider routers are also reduced. This dynamic optical network architecture, with an analytical evaluation, will be presented.

Application-centric energy reduction scheme with dynamic lane assignment scheme in 100GE

Takahiro Miyazaki, Ion Popescu, Mirai Chino, Yoshihiro Isaji, Kunitaka Ashizawa, Xiaoyu Wang, Satoru Okamoto, Malathi Veeraghavan, YAMANAKA NAOAKI

The 11th International Conference on IP + Optical Network (iPOP2015) (Naha, Okinawa, Japan) ,

2015.04

Oral presentation (general), PIL, ISOCORE USA and Okinawa Open Laboratory (OOL)

We propose the dynamic lane assignment scheme for each application in 100GE. This proposal aims to solve two problems. First, as described above, power consumption and packet delay are trade-off model. So, we propose a assignment scheme for each traffic type. Traffic type is divided into two classes, delay-tolerant and not-delay-tolerant one. By assigning lanes to each traffic type, each traffic type is handled by different ALR policy, so proposal scheme can realize both energy reduction and less packet delay. Second, the dynamic lane assignment scheme is proposed. The amount of the incoming packet is different every time, so the dynamic lane assignment scheme for each application is needed. Figure 1 shows the legacy 100GE architecture and Figure 2 shows the proposed 100GE architecture. To realize above requirement, we propose the 100GE using coherent lightwave technologies. The proposal scheme can realize dynamic lane assignment scheme for each application. We will evaluate the effectiveness of our proposal.

アプリケーションの遅延特性を考慮した Energy Efficient Ethernet

Mirai Chino, Ion Popescu, Takahiro Miyazaki, Yoshihiro Isaji, Shoichi Nagata, Kunitaka Ashizawa, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Communication Systems (CS) (Fukuoka) ,

2015.04

Oral presentation (general)

Power Saving-oriented Path Reallocation Utilizing Advantage of Low Power Idle

Yoshihiro Isaji, Takahiro Miyazaki, Kunitaka Ashizawa, Mirai Chino, Hidetoshi Takeshita, Satoru Okamoto, Eiji Oki, Naoaki Yamanaka

IEICE Technical Report on Network Systems (NS) (岐阜県高山市　飛騨地域地場産業振興センター) ,

2015.04

Oral presentation (general)

Multi- (layer, path, and resources) Dynamically Optimized Routing (MiDORi) network which aggregates traffic by Traffic Engineering (TE) and reduce power consumption by on / off of port-by-port of network equipments have been proposed. Energy Efficient Ethernet (EEE) to perform the power reduction of the link as a related study has been attracting attention in recent years, technology called Low Power Idle (LPI) is adopted as a mechanism for power saving techniques EEE. However, the problem is that a power consumption using a conventional MiDORi algorithm at low traffic is increased in MiDORi network using LPI. Therefore, we propose a network power-saving technique by path re-allocation algorithm that takes into account the LPI power characteristics in this paper. By changing the path to a high link-usage link from a low link-usage link, it is a technique for reducing power consumption in the entire network. The comparison in terms of computation time, network performance and power consumption is performed for conventional method and proposed method, and confirmed the validity.

Power/Resource Optimization Resource Allocation Design Method of Getting Resource Utilization Information on Virtual Networks

Kei Nakamura, Shoichi Nagata, Tetsuhiro Uchida, Hidetoshi Takeshita, Satoru Okamoto, NAOAKI YAMANAKA, Eiji Oki

IEICE Student Workshop on Photonic Network (沖縄県那覇市青年会館) ,

2015.03

Oral presentation (general)

Traffic growth of the Internet by increasing of rich contents and the spread of mobile devices will lead growing power consumption. To solve this problem, a network virtualization technology which can use network resource effectively has gained attention. In the network virtualization technology, before operating the network, the administrator allocates bandwidth resource in network virtualization infrastructure so as to satisfy the multiple virtual network requests as much as possible. And during the network operation all virtual networks use allocated resource of the infrastructure. Our proposal realizes the bandwidth allocation not only before network operation but also during the network operation according to the bandwidth resource usage. The proposed method enables optimal bandwidth using and can decrease power consumption.

Proposal of the Scalable Address Resolution Method in a Photonic Layer-2 Network

Yusuke Nakajima, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Student Workshop on Photonic Network (沖縄県那覇市青年会館) ,

2015.03

Oral presentation (general)

There are three requirements to realize a next generation optical core network, scalability, low-power consumption, and cost-effectiveness. To satisfy with three requirements, a Photonic - Layer 2 (P-L2) Network is proposed. P-L2 Network consists of a P-L2 edge and P-L2 bridge. Data are transmitted between P-L2 edges through P-L2 bridges without converting from optical signals to electrical signals. If a P-L2 network is a broadcast network, link utilization in a network degrades by address resolution due to broadcast traffic. Especially, link utilization considerably degrades if a network is single broadcast domain connecting several local area networks by Layer 2 Virtual Private Network (L2-VPN) on a P-L2 network. In this paper, we propose the scalable address resolution method that reduces broadcast traffic. In the proposal method, Software Defined Networking (SDN) controllers reply to requests of Address Resolution Protocol (ARP) as a proxy of a target host. SDN controllers manage pairs of Media Access Control (MAC) and Internet Protocol (IP) address by using Distributed Hash Table (DHT).

Data-centric Networking (DCN) and Energy-Efficeint and Enhanced type DCN (E3-DCN)

NAOAKI YAMANAKA, Daisuke Matsubara, Zhang Shanming, Satoru Okamoto, Hidetoshi Takeshita

IEICE Technical Committee on Network Virtualization（NV） (東京都　NICT本部) ,

2015.03

Oral presentation (general)

Proposal of the dummy signal insertion method for realizing the adaptive link rate of the serial transmission type Flex Ethernet

Satoru Okamoto, Takahiro Miyazaki, Ion Popescu, Mirai Chino, Naoaki Yamanaka, Malathi Veeraraghavan, Eiji Oki

IEICE General Conference 2015 (京都府　草津市　立命館大学　びわこ・くさつキャンパス) ,

2015.03

Oral presentation (general)

25 Gb/s × n の任意のEthernet を実現するFlex Ethernet の議論が進められている[1]．Flex Ethernet の適用例として，100 Gb Ethernet (100GE)の転送レートを転送トラヒック量に適応させ，PCS (physical-coding sublayer)，PMA (physicalmedium-attachment sublayer) ， PMD (physical-mediumdependent　sublayer)の未使用レーンを休止させることで省電力化を実現すること[2]があげられる．[2]においては，PHY の光モジュールのON 時間が 2 ms 程度と見積もられており，リアルタイムなトラヒック変動ではなくトラヒック予測に基づいた統計的な適応型リンクレート変更(ALR)手法が提案されている．本論文では，PHY としてコヒーレント伝送に基づいたシリアル100 Gb/s 伝送型システムを適用し，リアルタイムALR を実現するためにPHY が生成するダミー信号挿入手法を提案する．

Experimental Report of Network Reconfiguration for Traffic Fluctuation in Elastic Lambda Aggregation Network

Hidetoshi Takeshita, Teppei Yamaguchi, Kunitaka Ashizawa, Takehiro Sato, Asato Kotsugai, Naoaki Yamanaka, Satoru Okamoto

IEICE General Conference 2015 (京都府　草津市　立命館大学　びわこ・くさつキャンパス) ,

2015.03

Oral presentation (general)

サービス毎に設備されているアクセス網とメトロ網を統合し, フォトニックネットワーク技術とネットワーク機能の仮想化技術を組み合わせて, 多様なサービスやネットワーク構成を実現するエラスティックλアグリゲーションネットワーク(EλAN)が提案されている[1]. 本稿では, エネルギー最適なネットワークの再構成で必要となる, トラヒック変動に対応した論理OLT（L-OLT）のマイグレーションによる集約／分散について実験検証し, マイグレーション時のサービス停止時間を計測したので報告する.

Demand and Supply Matching Method of Electricity on Smart Grid Using PIAX

Kosuke ASAMI, Mitsuyasu ENDO, Ryo KUTSUZAWA, Soushi YAMAMOTO, Kenya TAKASHIMA, Hidetoshi TAKESHITA, NAOAKI YAMANAKA

IEICE Technical Report on Information Networks (IN) (沖縄県那覇市　沖縄コンベンションセンター) ,

2015.03

Oral presentation (general)

The introduction of a large number of distributed power generators,they include the power supply sources produced by renewable energy, has been studied in Smart Grid. Then, the power grid shifts from the tree 1:N structure with centralized power plants to the N:M structure with distributed various kind of power supply resources. In this case,to realize matching control among N supply resources including unstable renewable energy and M consumers, the real-time matching method with scalability is necessary. In this paper,we propose a novel real-time matching algorithm which utilizes the P2P Interactive Agent eXtensions (PIAX) platform, and has scalability. We show that the proposed algorithm enables the real-time matching, and reduces the search loads by the minimizing reconfiguration of search overlay networks. Then, we report the verification results used by the evaluation system.

Distributed Power Cooperation Algorithm to Maximize User’s Satisfaction under the Perfectly Competitive Market in Smart Grid

Mitsuyasu Endo, Kosuke Asami, Ryo Kutsuzawa, Soushi Yamanamoto, Kenya Takashima, Makoto Tanaka, Hidetoshi Takeshita, Naoaki Yamanaka

IEICE Technical Report on Network Systems (NS) (沖縄県那覇市　沖縄コンベンションセンター) ,

2015.03

Oral presentation (general)

In Smart Grid, the power grid shifts from the tree 1:N structure with centralized power plants to the N:M structure with distributed various kind of energy resources produced by solar panel or rechargeable batteries and etc. With the deregulation of electricity market, it becomes the perfectly competitive market, and any household can become power sellers. Then, the user’s satisfaction does not depend on the amount of power supply, and its amount must be determined based on user’s wish. Therefore, the electricity market needs real-time trading system to maximize user’s satisfaction. However, it is difficult to realize real-time trade system with the centralized control method, because of the increase of the trade complexity corresponding to the increase of sellers including private sellers. In this paper, we propose a novel distributed power cooperation algorithm to maximize user’s satisfaction. The proposed algorithm enables each household to know the electricity price based on the market price and the amount of supplied power from only neighboring households and to maximize the whole members' satisfaction in Smart Grid.

Proposal of the Scalable Virtualized Home Gateway using Atomic Network Functions Virtualization

Tetsuhiro Uchida, Tkakahiro Miyazaki, Takuro Okano, Hidetoshi Takeshita, Satoru Okamoto, Naoaki Yamanaka, Eiji Oki

IEICE Technical Report on Network Systems (NS) (東京都　八丈町　八丈町商工会) ,

2015.01

Oral presentation (general)

フォトニックネットワークの未来と技術

山中　直明

新世代ネットワーク推進フォーラムテストベッドネットワーク推進ワーキンググループ会合 (東京都千代田区) ,

2014.12

Oral presentation (general), 新世代ネットワーク推進フォーラム

TDMA-Based OLT Sharing Method to Improve Disaster Tolerance in Elastic Lambda Aggregation Network

Asato Kotsugai, Takehiro Sato, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

European Conference on Optical Communications (ECOC 2014) (Cannes, France) ,

2014.09

Oral presentation (general)

エラスティックλアグリゲーションネットワーク(EλAN)における仮想レイヤ2スイッチ実現手法の提案

Satoru OKAMOTO, Hidetoshi TAKESHITA, NAOAKI YAMANAKA

IEICE Society Conference 2014 (Tokushima University, Tokushima, Tokushima) ,

2014.09

Oral presentation (general)

アグリゲーション網をメトロ/アクセス統合型のフォトニックネットワークに置換し, フォトニックネットワーク技術とネットワーク仮想化及び機能の仮想化技術を組合せ, 多様なサービスやネットワーク構成を実現する次世代メトロ/アクセス統合網であるエラスティックλアグリゲーションネットワーク(EλAN)が提案されている. 本稿では, EλANにおけるOLTマイグレーションに適合可能なOLT間接続の仮想レイヤ2スイッチ実現手法を提案する.

Evaluation of Information-Centric Networking in Mobile and Distributed Environment Using Wide-Area Test Bed

Daisuke Matsubara, Satoru Okamoto, YAMANAKA NAOAKI,Tatsuro Takahashi

The 16th Asia-Pacific Network Operations and Management Symposium (APNOMS2014) (National Chiao Tung University, Taiwan) ,

2014.09

Oral presentation (general)

Information-Centric Networking (ICN) employs communication based on location independent data identifiers (IDs) that enables efficient data dissemination. However, some important challenges still remains in the conventional ICN schemes when they are applied to a highly mobile and distributed environment, such as growth in amount of route information or increased transaction load of name resolution services. To accommodate this, we propose a new ICN scheme where routes are aggregated at aggregation nodes and optimized routes are established during data registration transactions to mitigate the amount of route information, delay, and transaction load. We evaluate the proposed scheme using a nation-wide test bed of 37 intermediate nodes and 336 mobile terminals. We show that the proposed scheme enables efficient data dissemination where the mobile terminals register and retrieve data in widely distributed manner.

TDMA Based Logical OLT Virtualization Method for ONU Group Disaster Recovery

Satoru Okamoto, Asato Kotsugai, Takehiro Sato, Hidetoshi Takeshita, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (PN) (北海道札幌市) ,

2014.09

Oral presentation (general)

To improve disaster tolerance in optical access and aggregation network, the Elastic Lambda Aggregation Network (EλAN) has been proposed. In the EλAN, an active optical distribution network (ODN) will provide restoration capability among an optical line terminal (OLT) and optical network units (ONUs). However, when many central offices (COs) will be collapsed and ODN well be able to provides fiber routes from ONUs to COs, few OLTs should support enormous numbers of ONUs. If the number of ONUs is over the accommodation number of the OLT, many ONUs are not able to recover from the disaster. To solve this problem, this paper proposes a time division multiple access (TDMA) based logical OLT sharing method among ONU groups. The proposed method provides exceeding the ONU accommodation limit number of single OLT. The prototype implementation and performance evaluation results are present.

Energy Efficient Data-centric Network on the Optical Network Virtualization Platform

Satoru Okamoto, Shanming Zhang, YAMANAKA NAOAKI

12th International Conference on Optical Internet (COIN2014) (Hyatt Regency Jeju, Jeju, Korea) ,

2014.08

Oral presentation (general)

The network architecture called Energy Efficient and Enhanced-type Data-centric Network (E3-DCN) is proposed for a new information centric network (ICN). E3-DCN not only realizes ICN but also has the ability of data generation by organizing and combining relevant resource such as original data and kinds of processing services. In addition, in order to improve energy efficiency of data transmission, E3-DCN chooses optimal transmission path to transmit data based on electrical packet switching and optical path switching. E3-DCN achieves an energy efficient network and is designed to fit with the network virtualization platform in JGN-X.

Application-centric, energy-efficient network architecture, ACTION, based on flexible optical network

YAMANAKA NAOAKI, Satoru Okamoto, Eiji Oki, Andrea Fumagalli, Malathi Veeraraghavan

12th International Conference on Optical Internet (COIN2014) (Hyatt Regency Jeju, Jeju, Korea) ,

2014.08

Oral presentation (general)

The Compound Annual Growth Rate (CAGR) of Internet traffic volume lies in the 30-70% [1] range. For several good reasons (to handle unexpected traffic spurts, link failures and traffic growth), network resources are significantly over-provisioned in today’s networks, and it is quite common to see link utilization in the 30%-40% range [2]. While new optical fibers can be laid, the costs of such deployment should be weighed against the costs of solutions that enable network operation at higher utilization levels. For example, new developments in optical technologies, such as flexible elastic optical networks, enable the provisioning of variable-bandwidth, variable-QoS (Quality of service) transmission pipes. In addition, current and future multi-media services have widely divergent bandwidth and QoE (Quality of Experience) requirements. ACTION (Applications Coordinated with Transport, IP and Optical Networks) is a multi-QoE, application-centric, highly energy-efficient network architecture that leverages flexible elastic optical network technologies. This project is supported by both the NSF, USA, and NICT, Japan, under the JUNO (joint collaboration between Japan and US) program.

Experimental Report of Elastic Lambda Aggregation Network (EλAN) Control Method for SDN-based Carrier Class Network

Teppei Yamaguchi, Takehiro Sato, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

12th International Conference on Optical Internet (COIN2014) (Hyatt Regency Jeju, Jeju, Korea) ,

2014.08

Oral presentation (general)

A Cash Policy Taking into account User's Location into cache lifetimes

Takahiro MIYAZAKI, Hidetoshi TAKESHITA, Satoru OKAMOTO, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (PN) (大分県別府市ビーコンプラザ) ,

2014.06

Oral presentation (general)

Against the problem that contents request occupies the majority of today's Internet traffic, content centric network(CCN) is proposed. In CCN, user request contents by content's name and relay node cache contents. Because of it's characteristic, content search time uctuates greatly on whether the user's request content are cached at the relay node as soon as possible. So, cache methods that search the content as soon as possible is needed. In this paper, we introduced some cache methods and revealed its advantages and problems. Then, we proposed cache method that reflect the user location into survival time in order to solve the problems of the conventional method. Compared to the conventional method , simulation shows the proposed method improved cache hit ratio and the number of hops the content can be acquired.

Study on Method Comparison for Data-centric Networks

Daisuke Matsubara, Satoru Okamoto, Naoaki Yamanaka ,Tatsuro Takahashi

IEICE Technical Report on Internet Architecture (IA) (兵庫県神戸市　神戸大学) ,

2014.06

Oral presentation (general)

Energy Efficiency of Future Central and/or Linked Distributed Function Network Using Optical Technologies

Naoaki Yamanaka, Hidetoshi Takeshita, Satoru Okamoto, Takehiro Sato,

19th European Conference on Networks and Optical Communications (NOC 2014) (Milan, Italy) ,

2014.06

Oral presentation (general)

Recently cloud service and M2M or IoT service will become popular for different applications. So two different optical network architectures are proposed for creating future energy efficient network services. The first architecture is a centralized approach for higher energy efficiency; it uses a data center-centric optical aggregation network based on wavelength / time-slot multiplexing. All layer-3 or upper traffic are transferred through the simple metro / access optical aggregation network and switched in centralized scalable giant router at the data center. Total power consumption of the network can be reduced hundred fold compared to the existing Internet. The second is service mash-up by linked data through a network that uses broadband optical wire for the IoT era. All service contents, hardware, and also software programs are defined as service parts. Huge bandwidth optical wire interconnects some service parts and creates new mash-up services in the network. That creates deep network functionality in combination with network and processing functions. Network services are always moving like pendulum, so both two technologies can be applied future network service.

SDN/NFV based disaster recovery method in Elastic Lambda Aggregation Network(EλAN)

Asato Kotsugai, Takehiro Sato, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

10th International Conference on IP + Optical Network (iPOP 2014) (Musashino, Tokyo, Japan) ,

2014.05

Oral presentation (general)

The Elastic Lambda Aggregation Network (EλAN) which aims to integrate several individual service access networks and metro networks into one optical switching network has been proposed [1]. EλAN consists of programmable OLTs (P-OLTs) and ONUs (P-ONUs), Optical Distribution Network (ODN), and a wide area virtual layer-2 Switch (VL2SW). Many logical OLTs (L-OLTs) can be worked in one P-OLT box and a few number of logical ONUs (L-ONUs) can be worked in one P-ONU box. One L-OLT will accommodate maximum 256 L-ONUs. ODN supplies flexible optical paths among L-OLTs and L-ONUs. VL2SW supplies flexible Layer-2 paths among L-OLTs and a core network. Therefore, a network operator can select flexible combination of L-OLT and L-ONUs.

NFV Capability for Next Generation Multi-Serice Platform

Julien Thieffry, Soushi Yamamoto, Tetsuhiro Uchida, Satoru Okamoto, YAMANAKA NAOAKI, Takashi Kurimoto

10th International Conference on IP + Optical Network (iPOP 2014) (Musashino, Tokyo, Japan) ,

2014.05

Oral presentation (general)

Discussion on Operation Administration and Maintenance (OAM) Point and Multi-service Accommodation Method for the Elastic Lambda Aggregation Network (EλAN)

Satoru Okamoto, Takehiro Sato, Eiji Oki, Hidetoshi Takeshita, Naoaki Yamanaka

IEICE Spring Conference (新潟県　新潟大学) ,

2014.03

Oral presentation (general)

アグリゲーション網をメトロ/アクセス統合型のフォトニックネットワークに置換し, フォトニックネットワーク技術とネットワーク及び機能の仮想化技術を組合せ, 多様なサービスやネットワーク構成を実現する次世代メトロ/アクセス統合網であるエラスティックλアグリゲーションネットワーク(EλAN)が提案されている. 本稿では, EλANにおけるサービス統合手法とOAM機能配備を検討した結果を報告する.

Beyond the SDN and Virtualization

Naoaki Yamanaka, Satoru Okamoto, Shanming Zhang, Hirofumi Yamazaki, Takashi Kurimoto

IEICE Spring Conference (新潟県　新潟大学) ,

2014.03

Oral presentation (general)

トラヒックの量や質, 種類の増加を勘案し, 現在あるインターネットを根本から変えるべきネットワークの研究が行われている. 新世代ネットワーク（NwGN）において, 我々はSDN/仮想化ネットワークの高度化を目指し, Slice上で物理ネットワークのメトリック（帯域, 距離, 消費電力等）を抽象化させて読み取るAPIを開発している[1]. これにより, Slice毎に, トポロジだけではなくQoSを持ったネットワーク運用が行えると考える. また, 現在行われている技術的なブレークスルーのみではなく, 今後も多くのアイデアや機能がダイナミックに実現できるオープンイノベーションプラットフォームの概念とそのエコシステムの検討を行った. つまり, すべての技術やアプリケーションを自ら開発・実現するのではなく, サードパーティが自由に開発し, そこでビジネスができるモデルである. 以降, その詳細を説明する.

Experiments for logical OLT Migration in Elastic Lambda Aggregation network

Hidetoshi Takeshita, Yuki Higuchi, Takehiro Sato, Asato Kotsugai, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Network Systems (NS) (宮崎県　宮崎市　フェニックスシーガイアリゾート) ,

2014.03

Oral presentation (general)

Discussion on Network Virtualization

Satoru Okamoto, Naoaki Yamanaka, Hidetoshi Takeshita, Takuro Okano, Tetsuhiro Uchida

IEICE Technical Report on Network Systems (NS) (宮崎県　宮崎市　フェニックスシーガイアリゾート) ,

2014.03

Oral presentation (general)

ネットワーク仮想化技術の進展に伴い, ユーザはフレキシビリティ及び制御性の増大というメリットを享受できている. 近年の, Software Defined Networking (SDN), Network Functions Virtualization (NFV), Service Function Chaining (SFC) の進展によりCAPEX/OPEXの削減も期待されている. 本稿では, ネットワーク仮想化技術の進展を振り返り, メリットデメリットをレビューするとともに, ネットワーク運用において仮想化により失われているもの, それを補うための技術的方向性の議論を行う.

Evaluation of Mobile Communication Method for Data-oriented Network

Daisuke Matsubara, Satoru Okamoto, Naoaki Yamanaka, Tatsuro Takahashi

IEICE Technical Report on Internet Architecture (IA) (石川県　加賀市) ,

2014.02

Oral presentation (general)

将来のネットワークでは,スマートフォン,車載機器,センサなどの多様な無線端末がネットワークに接続する高度に分散したモバイル環境が主流になると予想される.筆者はこのようなモバイル環境での効率的なデータ配信・取得を実現する移動通信方式としてData-centric Network(DCN)を提案している.前橋では,広域網のテストベッドであるJGN-Xを用いてDCNノード7台での性能評価を行った.一方,大規模なネットワークトポロジにおいてDCNノードの数,データIDの数,データ登録・取得の頻度などが増加した際のDCNの特性評価が不十分であった.本稿ではData-centric Network(DCN)について,DCNノード7台という大規模テストヘッドを用いた実験を行い,DCNノードが最適化された経路情報を管理することで大規模ネットワークでも上位DCNノードへの処理負荷が提言できることを確認した.

Peak load Shifting and Electricity Charges Reduction Realized by Electric Vehicle Storage Virtualization

Harunaga Onda, Takashi Tazoe, Soushi Yamamoto, Hidetoshi Takeshita, Satoru Okamoto, Naoaki Yamanaka

IEICE Technical Report on Internet Architecture (IA) (東京都港区) ,

2014.01

Oral presentation (general)

This paper proposes a new Electric Vehicle (EV) batteries ownership virtualization technique to control charge/discharge time to minimize busy period electric power supply from the grid. The proposed method uses a genetic algorithm to achieve highly stable network. The proposed method enables to expand the usage of EV battery. The computer simulation result shows that the proposed method can reduce electricity charges by average 11% per day compared to conventional scheme. The proposed EV storage virtualization technique can increase total energy efficiency and reduce energy cost when employing real-time pricing (RTP).

Peak load Shifting and Electricity Charges Reduction Realized by Electric Vehicle Storage Virtualization

Harunaga Onda, Soushi Yamamoto, Hidetoshi Takeshita, Satoru Okamoto, Naoaki Yamanaka

2013 2nd AASRI Conference on Power and Energy Systems (PES 2013) (Jeju island,Korea) ,

2013.12

Oral presentation (general)

We propose a new EV battery demand/response control method, which consists of a new Electric Vehicle (EV) batteries ownership virtualization technique realized by “deposited power concept” and a huge virtual battery pool to enable charge /discharge at any time and a genetic algorithm to control demand/supply of EV batteries. Center controller named EVNO (Energy Virtual Network Operator) has a huge virtual battery pool which is aggregated by “deposited power” of each EV, and controls demand/supply of each EV by the genetic algorithm. Since EVNO controls the deposited power among their EV batteries, EV users lose ownership of the deposited electric power in their EV batteries. At this time, EV owner does not use the electric power in his EV physically. In this way, the electric power which is logically aggregated in virtual battery pool of EVNO is called “deposited power”. The computer simulation result shows that the proposed method can reduce electricity charges by average 11%, and can reduce power demand curve by average 13% per day compared to conventional scheme under real-time pricing (RTP).

Photonic Network Vision 2020 - Smart Photonic Networking, Synthetic Transport Platform, and Scale-Free Photonics -

Kenichi Kitayama, Atsushi Hiramatsu, Masaki Fukui, Takehiro Tsuritani, YAMANAKA NAOAKI, Satoru Okamoto, Masahiko Jinno, Masafumi Koga

IEEE Global Communications Conference (GLOBECOM) 2013 Workshop - Software-Defined Networking on Optics (Atlanta, GA, USA) ,

2013.12

Oral presentation (general)

Creating Future Energy Efficient Network Services through Optical Technologies

Naoaki Yamanaka, Hidetoshi Takeshita, Satoru Okamoto, Akiko Hirao, Takehiro Sato

2013 1st International Symposium on Computing and Networking - Across Practical Development and Theoretical Research - (CANDAR 2013) (Matuyama, Ehime, Japan) ,

2013.12

Oral presentation (general)

Two newly-structured optical network architecture　alternatives are proposed for creating new network services. The　first target is an energy efficiency network; a data center-centric　optical aggregation network based on wavelength/time-slotmultiplexing. Not only application layer functions but also all　layer-3 or upper traffic are transferred through the optical　aggregation network and switched in the huge centralized router　at the data center. Power consumption of the network can be　reduced ten or twenty fold compared to the existing Internet. The　second is a service mash-up network that uses broadband optical　wire under the IoT generations. All service contents, hardware,　and software programs are defined as a service part. Optical wire　interconnects some service parts and creates new mash-up　services in the network. That creates deep network functionality　in combination with network and processing functions.

PIAXを用いたMachine-to-Machine(M2M)プラットフォームの検討

山本草詩, 浅見康介, 岩崎陽介, 遠藤光泰, 岡本聡, Naoaki Yamanaka

第6回光ネットワーク研究会 (Atami, Shizuoka) ,

2013.12

Oral presentation (general)

近年, Machine to Machine(M2M)通信が世界的に注目されている. M2Mとは, 人間の手を介さず, 家電など現実世界のあらゆる物がつながる世界のことである. M2Mアプリケーションの応用分野は, 交通, 電力, 流通, 医療, 物流, セキュリティ等多々に渡り, 将来的には人間の代理人(ソフトウェア・エージェント)としての機能を担うことが期待されている. 従来のM2Mは, 垂直統合型M2Mで実現されている. 垂直統合型M2Mは, サービス事業者自身が, サービスに特化したシステム構築を行うものであるが, 高コストとなり, 提供可能なM2Mサービスが制限されるという問題点が存在する. 本研究では, 水平統合型M2Mアーキテクチャおよび, 水平統合に必要な共通インタフェースについての検討を行った.

電力の需要供給マッチングにおける分散制御による複数ノード間のリソース取得手法の検討

Kosuke Asami, Yosuke Iwasaki, Soushi Yamamoto, Satoru Okamoto, Naoaki Yamanaka

第6回光ネットワーク研究会 (Atami, Shizuoka) ,

2013.12

Oral presentation (general)

ホームゲートウェイクラウドを利用したM2Mネットワークにおける処理負荷分散手法

Yosuke Iwasaki, Kosuke Asami, Soushi Yamamoto, Satoru Okamoto, Naoaki Yamanaka

第6回光ネットワーク研究会 (Atami, Shizuoka) ,

2013.12

Oral presentation (general)

Experimental Report of the Multi-layer Network Control for the Elastic Lambda Aggregation Network (EλAN)

Satoru Okamoto, Shan Gao, Ko Kikuta, Takehiro Sato, Hidetoshi Takeshita, NAOAKI YAMANAKA

IEICE Society Conference (福岡県福岡市福岡工業大学) ,

2013.09

Oral presentation (general)

ネットワーク全体の消費電力削減のために, フォトニックネットワーク領域の拡大は急務であり, アグリゲーション網をメトロ/アクセス統合型のフォトニックネットワークに置換し, ネットワーク仮想化やネットワーク機能の仮想化を取り込み, 多様なサービスやネットワーク構成を実現し, サービス提供する容量を伸縮自在に利用する次世代メトロ/アクセス統合網であるエラスティックλアグリゲーションネットワーク(EAN)が提案されている. 本稿では, サービス統合とメトロ/アクセス統合に必要となるマルチレイヤ網制御プロトコルにOpenFlow1.0を適用し, MPLS-TPスイッチと光スイッチのマルチレイヤ制御実験を行った結果を報告する.

Evaluation of data centric network using wide area network testbed

Daisuke Matsubara, Satoru Okamoto, NAOAKI YAMANAKA, Tatsuro Takahashi

IEICE Technical Report on Internet Architecture (IA) (東京都千代田区) ,

2013.09

Oral presentation (general)

Distributed Demand Scheduling Method to Reduce Energy Cost in Smart Grid

Akiyuki Imamura, Soushi Yamamoto, Takashi Tazoe, Harunaga Onda, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

Humanitarian Technology Conference 2013(HTC2013) (Tohoku University, Sendai, Miyagi, Japan) ,

2013.08

Oral presentation (general)

Smart grid has attracted attentions and expresses a view for the future power systems in the world. Demand Side Management(DSM) is a significant method in smart grid that helps the energy providers to shift behind the peak load. Some methods to reduce peak load have been studied in dynamic pricing. One of the purposes is to delay the demand to periods of low electricity price. The conventional scheduling method makes load curve that is inversely proportional to electricity prices as an objective load curve, and this strategy delay the expected demand curve as close as to the objective load curve. There is a problem, however, the scope of controlled object is limited and the whole load situation is not considered. This paper presents a method to smooth the demand situation of each house to reduce electricity prices by a Genetic Algorithm, in consideration of the amount of the whole demand and coordination between each group. The proposed method is able to give a higher value of objective to the group which has more shiftable demand, by adjusting the objective curve considering the delayable time. This feature makes the load as close as the object and reduces electricity price. Simulation results show that the proposed algorithm achieve the reduction of the peak load and the utility bill in smart grid.

Experimental Report of the MPLS-TP/Optical Switch Multi-layer Network Control using OpenFlow1.0

Satoru Okamoto, Shan Gao, Ko Kikuta, Takehiro Sato, Hidetoshi Takeshita, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (PN) (北海道札幌市北海道大学) ,

2013.08

Oral presentation (general)

The Elastic Lambda Aggregation Network (EλAN) has been proposed. The EAN is combined optical access networks for service access and an aggregation network for service traffic aggregation to a service agnostic core network by optical elastic networking technologies and network virtualization technologies. In the EAN, MPLS-TP is one of the candidate transport protocols for realizing service unification. This paper provides an experimental report of the control of multi-layer which is composed of the MPLS-TP network and the optical switch network using the OpenFlow 1.0 protocol.

A Study on Network Control Method in Elastic Lambda Aggregation Network (EλAN)

Takehiro Sato, Kazumasa Tokuhashi, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

2013 IEEE Conference on High Performance Switching and Routing (HPSR 2013) (Taipei, Taiwan) ,

2013.07

Oral presentation (general)

This article proposes a network control method that realizes on-demand service providing in Elastic Lambda Aggregation Network (EλAN). EλAN is a next-generation access/aggregation network that provides various network services having different protocols and QoS requirements. EλAN also achieves the reduction of total network power consumption by sharing access network equipment by multiple network services. In the proposed method, fixed optical trees are introduced to EλAN to exchange control messages in the same manner as today's FTTH systems. Discovery process and optical path/tree aggregation using the optical trees are explained in this article. We also discuss the energy-saving effect of the optical path/tree aggregation in EλAN.

Optimum Multicast Time Slot Allocation in Active Optical Access Network

Yuji Shimada, Takehiro Sato, Kazumasa Tokuhashi, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

10th Conference on Lasers and Electro-Optics Pacific Rim, and The 18th OptoElectronics and Communications Conference / Photonics in Switching 2013(CLEO-PR&OECC/PS2013) (Kyoto International Conference Center, Kyoto, Japan) ,

2013.07

Oral presentation (general)

Fast Energy-efficient Point-to-MultiPoint Routing Algorithm for MiDORi

Akiko Hirao, Yuki Nomura, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

2013.07

Oral presentation (general)

Creating New Generation Optical Network Service

YAMANAKA NAOAKI, Hidetoshi Takeshita, Satoru Okamoto, Takehiro Sato

15th International Conference on Transparent Optical Networks (ICTON2013) (Cartagena, Spain,) ,

2013.06

Oral presentation (general)

Two newly structured optical network architecture is proposed to create new optical network service. First one is energy efficient, data center centric optical aggregation network based on wavelength/time-slots multiplexing technique. All layer-3 traffic are transferred through the optical aggregation network and switched at huge centralized router at the data center. Power consumption of the network can be reduce 1/10 – 1/20 compared to the existing Internet. Next is service mash-up network by using broadband optical wire. All service contents, hardware, and software programs are defined as service parts. Optical wire interconnects some service parts and creates new mash-up service in the network.

OpenFlow-based Multi-layer Service Adaptation Control Method in Elastic Lambda Aggregation Network (EλAN)

Yuki Higuchi, Yuji Shimada, Takehiro Sato, Satoru Okamoto, YAMANAKA NAOAKI

9th International Conference on IP+Optical Network (iPOP2013) (TKP Otemachi Conference Center, Tokyo, Japan) ,

2013.05

Oral presentation (general)

Optimal Multiple Multicast Trees for Many-to-Many Multicasting Communication

Shanming ZHANG, Hidetoshi TAKESHITA, Takashi KURIMOTO, Satoru OKAMOTO

IEICE Technical Report on Network Systems (NS) (The Wajima Chamber of Commerce and Industry) ,

2013.04

Oral presentation (general)

Multicast, which provides an efficient way of disseminating data from a source to all the members in a multicast group, is usually used to solve one-to-many (1:N) communication problem such as transmissions of a multimedia content for many users. As the Internet becomes increasingly popular and the same content or service is distributed in many place, many-to-many (M:N) communication have emerged such as transmission among many sources and destinations. In this paper, we study the M:N communication optimal problem among many the same sources and different destinations, and propose an many-to-many multicast routing approach to address effectively this problem. In the proposal, multiple shared multicast trees are used among many source and destinations. By comparing with a single shared shortest path tree approach, the proof of correctness of the proposal is proved. And at last, the analysis of simulations is also provided.

Energy Efficient and Enhanced-type Data Centric Network (E3-DCN) using Network Virtualization Techniques

NAOAKI YAMANAKA, Satoru Okamoto, Naohiko Shibuta, Shanming Zhang, Takuro Okano, Takashi Kurimoto

IEICE Technical Report on Communication Quality (CQ) (新潟県佐渡市佐渡島開発総合センター) ,

2013.04

Oral presentation (general)

The New Generation Network supports network virtualization technique that creates multi-slice network on one physical network. E3-DCN is newly proposed using optical packet switching network and optical path switching network. Optical packet network has high-network efficiency and flexibility. On the other hand, optical path network has huge band width. Combination of both packet and path technique can create energy efficient network. In addition, virtualization techniques apply to future photonic backbone and also smart energy network are also highlighted.

Proposal of the Elastic Lambda Aggregation Network (EλAN)

Satoru Okamoto, Takehiro Sato, Hidetoshi Takeshita, NAOAKI YAMANAKA

IEICE General Conference (岐阜県岐阜大学) ,

2013.03

Oral presentation (general)

エラスティック技術の進展により, ネットワークに合わせたサービス展開ではなくサービスに合わせたネットワークを提供するというパラダイムシフトが起きつつある. このパラダイムシフトを加速させるために, サービス毎に展開されるアクセス網とコア網に向けて各サービストラヒックを集約するアグリゲーション網を一体的にエラスティックな光ネットワークとして運用させる技術である「エラスティックλアグリゲーションネットワーク(EλAN)」を提案する.

A Study on Parallelizing Dynamic Bandwidth Allocation in Elastic Lambda Aggregation Network

Teppei Yamaguchi, Yuki Higuchi, Yuji Shimada, Takehiro Sato, Hidetoshi Takeshita, Satoru Okamoto, NAOAKI YAMANAKA

The 9th IEICE Student Workshop on Photonic Network (沖縄県那覇市青年会館) ,

2013.03

Oral presentation (general)

A Study on TDM Networks Coordinating Multi-OLTs in Elastic Lambda Aggregation Network

Teppei Yamaguchi, Yuki Higuchi, Takehiro Sato, Hidetoshi Takeshita, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (PN) (沖縄県那覇市青年会館) ,

2013.03

Oral presentation (general)

As a next-generation metro/access integrated network with a erastic band, we study Elastic Lambda Aggregation Network (E$lambda$AN).
E$lambda$AN realizes elastic bandwidth allocation by changing the connection of the OLT and the ONU responding to traffic demand.
As an form of network configuration E$lambda$AN, In this paper, we propose the model of TDM network using optical switch.
Consider the trade-off of the number of the use of optical switches and blocking ratio, we have carried out a comparative study of the multiple network model.

データ指向型ネットワークの検討

Daisuke Matsubara, Hitoshi Yabusaki, Satoru Okamoto, NAOAKI YAMANAKA, Tatsuro Takahashi

IEICE Technical Report on Network Virtualization (NV) (東京都東京大学本郷キャンパス) ,

2013.03

Oral presentation (general)

Smart Grid Network Architecture with Dynamic Demand Scheduling Algorithm 2.0

Soushi Yamamoto, Satoru Okamoto, Naoaki Yamanaka

第5回光ネットワーク研究会 (Atami, Shizuoka) ,

2013.02

Oral presentation (general)

To realize balance between power supply and de- mand, many demand response programs (DR) are proposed. Although a large number of studies have been made on reducing peak-to-average ratio (PAR), little is known about achieving fairness between consumers. For example, consumer A always reserves the electricity ahead of time, consumer B never reserve it. If there are highly-loads in the power grid, consumer A waits until the load reaches lower value, and then consumer A turns on appliances. consumer A has a high chance of getting lower power price than consumer B but there are no guarantee that. Sometimes consumer A may get higher power price due to unexpected power demands occured. In this paper, we propose incentive-based dynamic demand scheduling algorithm and con- trol architecture with it. Consumers can get the monetary benefits each time they wait. Simulation results confirm that the proposed approach can reduce the peak-to-average ratio of the total energy demand. In addition, consumers can get the monetary benefits according to their waiting time.

データ指向型ネットワークの検討

Daisuke Matsubara, Hitoshi Yabusaki, Satoru Okamoto, NAOAKI YAMANAKA, Tatsuro Takahashi

IEICE Technical Report on Network Software (NWS) (埼玉県ふじみ野市KDDI研究所（上福岡）) ,

2013.01

Oral presentation (general)

Evaluation of Mobility Method for Data-centric Networking

Daisuke Matsubara, Hitoshi Yabusaki, NAOAKI YAMANAKA, Satoru Okamoto, Tatsuro Takahashi

IEICE Technical Report on Internet Architecture (IA) (Hiroshima city university koudou small hall , Hiroshima, Japan) ,

2012.12

Oral presentation (general)

Conventional telephone networks were mainly used for voice communication between two terminals, but future networks is predicted to support data distribution and retrieval via the network, as seen in M2M (Machine-to-Machine) services. Recently network architecture called Data-oriented Network that is optimal for data distribution and retrieval is proposed. However, existing methods have problems where the method does not scale when data is moving in wide area and frequently added, moved, and updated. In this paper, we propose Data-oriented Network that enables scalable routing in extremely distributed and mobile environment.

相互接続性検証WG10年史活動の沿革

NAOAKI YAMANAKA

けいはんな情報通信オープンラボシンポジウム2012 (HOTEL new HANKYU osaka, Osaka, Japan) ,

2012.12

Oral presentation (general), けいはんな情報通信オープンラボ研究推進協議会

Multicast IPTV System Using PLZT Optical Switch on Active Optical Access Network

Yuji Shimada, Takehiro Sato, Kazumasa Tokuhashi, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

The 9th IEEE Tokyo Young Researchers Workshop (National Olympics Memorial Youth Center Reception Hall, Tokyo,Japan) ,

2012.11

Poster presentation

Recentry, IPTV which provided by optical access network are developed. We have proposed an active optical access network (ActiON) employing high-speed optical switches that ensures a higher subscriber number and longer transmission distance than those in the case of the conventional PON for IPTV. Moreover, ActiON supports multicast slot allocation, which forces the switch to behave as an optical splitter. This paper introduces ActiON with variable distribution mode, which controls the distribution rate of the power. Proposed method realizes ﬂexible multicast slot allocation according to the transmission distance from OLT to each user and the number of required users. Moreover, as the technology to realize the proposed method, this paper also shows increasing bandwidth efficiency by adjusting of the proportion of optical power by applying the variable voltage to each electrode.

[Keynote/Invited]Creating New Optical Network Service

YAMANAKA NAOAKI

The 3rd Japan-US Future Network collaboration Workshop on Advanced Reseach Issued (TKP tokyo eki yaesu conference 7F,Tokyo, Japan) ,

2012.11

Oral presentation (invited, special)

Novel Scheduling Method to Reduce Energy Cost by Cooperative Control of Smart Houses

T.Tazoe, J.Matsumoto, D.Ishi, S.Okamoto, Yamanaka NAOAKI

IEEE PES International Conference on Power Systems Technology (Auckland, NewZealand) ,

2012.10

Oral presentation (general)

A smart house which equips power generators, power storage systems, and a smart meter which controls those equipments to utilize renewable energy efficiently has attracted attentions. Smart house is expected to reduce energy cost of residential by efficient usage of energy resources. Scheduling methods of the equipments to reduce energy cost have been proposed. However, since they focus on only one house, the effect of the scheduling decreases due to the imbalance of the equipments and the concentration of selling energy to power grid at same time. This paper proposes a new scheduling method to operate multi-smart houses totally by virtually sharing their equipments. The proposed method can improve the imbalance of the equipments and reduce the amount of disposal energy. By computer simulation, it is shown that the proposed method can reduce over 16 % the energy cost to the conventional method.

Multi-(layer, path, and resources) Dynamically Optimized Routing Network System

NAOAKI YAMANAKA

戦略的情報通信研究開発推進制度(SCOPE) 第8回成果発表会(平成24年) (Makuhari Messe, Chiba, Japan) ,

2012.10

Oral presentation (general)

To realize lO% to 22% Power consumption reduction of carrier,s and/or data-center networks witha network side
resource optimization approach, four R&D items have been set and performed.
【1】Develop an algorithm which proceeds to find out least link topology undergiven traffic and QoS requirements.
【2】Develop an omoad engine which executes the algorithm within usable calculation time.
【3】Develop a network control protocol which supports link power on/offControl to apply calculated topology to the
network.
【4】Develop a prototype router/switch system which supports link power on/off capability viathe control protocol.

A Novel Architecture of Energy Efficient and Enhanced-type Data Centric Network (E3-DCN)

Shanming Zhang, Naohiko Shibuta, Hidetoshi Takeshita, Satoru OKAMOTO, NAOAKI YAMANAKA

IEICE Technical Report on Information Networks (IN) (BELLESALLE Yaesu, Tokyo, Japan) ,

2012.10

Oral presentation (general)

In this paper, a novel network architecture which is called Energy Efficient and Enhanced-type Data-centric Network (E3-DCN) is proposed which not only supports machine-to-machine communication society for further, but also realizes an advanced energy efficient network. E3-DCN searches the user’s desired data by Data ID, and moreover can generate new data using existing network resource according to user’s request. It can choose the optimal transmission path and also can reconfigure network topology according to current network situation for energy saving. In addition, E3-DCN applies advanced intelligent cache strategies to realize an energy efficient Contents Delivery Network.

Dynamic Transmission Route Selection Towards the Contents Transmission Energy Optimization in E3-DCN

Naohiko SHIBUTA, Shanming ZHANG, Hidetoshi TAKESHITA, Satoru OKAMOTO, Eiji OKI, NAOAKI YAMANAKA

IEICE Technical Report on Network Systems(NS) (Tohoku University, Miyagi, Japan) ,

2012.09

Oral presentation (general)

We previously proposed Energy Efficient and Enhanced-type DCN(E3-DCN) which includes mash-up service and Data Centric Network(DCN) and transmission energy efficiency. Mash-up service is the cloud service which combines devices, softwares, and contents on network. In the DCN, users request contents names to the network and receive requested contents from the network. E3-DCN is built on the NeW Generation Network(NWGN), and aims at transmission energy optimization. In this paper, we propose the dynamic transmission route selection system in consideration of future traffic states. The simulation using Integer Linear Programming(ILP) shows the validity of this proposed system. And, we also introduce an experiment of a power saving mash-up service type contents distribution system.

EDA-based Charging Algorithm for Plug-in Hybrid Electric Vehicle to shift the peak of power supply

Takashi TAZOE, Soushi YAMAMOTO, Harunaga ONDA, Hidetoshi TAKESHITA, Satoru OKAMOTO, NAOAKI YAMANAKA

IEICE Technical Report on Information Networks (IN) (Tohoku University, Miyagi, Japan) ,

2012.09

Oral presentation (general)

This paper proposes a charging algorithm which is based on the Estimation of Distribution Algorithm (EDA) for Plug in Hybrid Electric Vehicle (PHEV). The proposed algorithm shifts the peak of power supply, satisfies the requested State of Charge (SoC [%]), and minimizes the charging cost. The proposed algorithm uses flexible weight for charging and upper charging limit to each PHEV to minimize the charge amount in peak time. The simulation result shows that the proposed algorithm shifts the peak of power supply in commute time zones, satisfies SoC of 93% PHEVs, and reduces charging cost by 31% compared with conventional EDA algorithm.

Energy Efficient Service Routing for Mashup Service

Shanming ZHANG, Naohiko SHIBUTA, Kenta NAKAHARA, Hidetoshi TAKESHITA, Satoru OKAMOTO, NAOAKI YAMANAKA

IEICE Society Conference 2012 (University of Toyama, Toyama, Japan) ,

2012.09

Oral presentation (general)

クラウドサービスは, ネットワークを介してユーザとサーバとを接続し, ユーザの希望するコンテンツ又は機能を提供するサービスである. クラウドサービスの利用者の急増に伴い, クラウド全体の消費電力が増加しており, 消費電力の削減が重要な課題となっている. ところが, 現在のインターネットでは, ネットワークの消費電力削減とサーバの消費電力削減の研究は独立に行われており, クラウド全体での消費電力削減の研究が進んでいない. そこで, 我々はクラウドサービスの1 つであるマッシュアップサービスについて, クラウド全体の消費電力を削減するサービスルーティング技術について提案し, 評価した結果について報告する

Energy Efficient and Enhanced-type Data-centric Network (E3-DCN)

Satoru Okamoto, YAMANAKA NAOAKI, Daisuke Matsubara, Hitoshi Yabusaki

13th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD 2012) (Campus Plaza Kyoto, Kyoto, Japan) ,

2012.08

Oral presentation (general)

This paper presents a concept of the Energy Efficient and Enhanced-type Data-centric Network (E3-DCN). For future network technology, the Contents-centric Network (CCN) is widely studied. DCN is an extended version of CCN. M2M communication and mobility of the data are supported. In the enhanced-type DCN, a user requests data name or identifier to the network. If the exactly matched requested data are not found in the network, the network constructs the requested data. E3-DCN provides an energy efficient contents delivery network on the network virtualization platform.

Energy Optimized Data Distribution using E3-DCN

Daisuke Matsubara, Satoru Okamoto, NAOAKI YAMANAKA

EU-Japan Co-ordinated Call Preparatory meeting (Tokyo, Japan) ,

2012.07

Oral presentation (general)

We foresee continuous increase in network traffic due to media streaming services and smart phones, and also future increase in M2M (Machine-to-Machine) data traffic such as sensor networks. On the other hand, improving the energy consumption of the network itself will be one of the important requirements in the future. In this presentation, we introduce a new network architecture called E3-DCN(Energy Efficient, and Enhanced-type Data Centric Network) which optimizes energy consumption within data-centric network.

Plug-and-Play Techniques for Self Organized Energy-Efficient GMPLS Network Configuration

Yuki Nomura, Haruka Yonezu, Akiko Hirao, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

8th International Conference on IP + Optical Network (iPOP 2012) (Hiyoshi Campus, Keio University, Yokohama, Japan) ,

2012.05

Poster presentation

We set up a six-node full-mesh connected test network. The TE link information, which should be dynamically set in adding/deleting nodes, in the LMP configuration has accounted for nearly 64% (5 TE links information) of the total per one C-plane node. The MiDORi-GMPLS software is able to detect increasing and decreasing of nodes and links, and set all TE link parameters using the plug-and-play technique. Therefore, the operator sets 36% of static parameters in advance, the MiDORi network system automatically recognizes the physical network topology and TE links. The system reads initial LSP configuration and start operation. Node deletion and addition have been successfully operated.

Prim's Algorithm Based P2MP Energy-saving Routing Design for MiDORi

Akiko HIRAO, Yuki NOMURA, Haruka YONEZU, Hidetoshi TAKESHITA, Satoru OKAMOTO, Naoaki YAMANAKA YAMANAKA NAOAKI

The 10th International Conference on Optical Internet (COIN 2012) (Hiyoshi Campus, Keio University, Yokohama, Japan) ,

2012.05

Poster presentation

The proposal of the realization method of the portabiilty of EV battery by construction of a virtual home network

Harunaga ONDA, Takashi TAZOE, Soushi YAMAMOTO, Hidetoshi TAKESHITA, Satoru OKAMOTO, NAOAKI YAMANAKA

IEICE Technical Report on Communication Systems (CS) (沖縄県石垣市石垣島官公労八重山会館) ,

2012.04

Oral presentation (general)

We propose a method ofr performing a virtual transmission where the power generation and consumption by Electric Vehicle (EV) in remote areas except its owner's home is regarded as the power generation and consumption at home. To realize the virtual transmission, a new bundle with special features is added to OSGi which is a platform of the home gateway. This bundle provides a communication function by IP between home gateways and manages the price of smart meters according to power generation and consumption in remote areas. The use of the bundle enables EV in remote areas to charge and discharge, and the power rate in the single family is reduced.

Proposal of the Energy Efficient and Enhanced-type Data Centric Network (E3-DCN)

Satoru Okamoto, Naohiko Shibuta, Shanming Zhang, Daisuke Ishii, NAOAKI YAMANAKA

IEICE General Conference (岡山県　岡山市　岡山大学津島キャンパス) ,

2012.03

Oral presentation (general)

The conventional telephony networking was used mainly for communication between two terminals. However, recent network such as the Internet is mainly used for data distribution and access via the network. Recent research efforts are conducted to realize new network architecture that is optimized for this kind of communication, but it lacked in scalability when the data is added, moved, or updated. In this paper, we propose a new architecture called Data-centric Network (DCN) that allows scalable access to dynamic data in a widely distributed environment.

A study on Data-Centric Network (DCN)

Daisuke Matsubara, Hitoshi Yabusaki, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Network Virtualization (NV) (北海道　札幌市　北海道大学人文・社会科学総合教育研究棟) ,

2012.03

Oral presentation (general)

The conventional telephony networking was used mainly for communication between two terminals. However, recent network such as the Internet is mainly used for data distribution and access via the network. Recent research efforts are conducted to realize new network architecture that is optimized for this kind of communication, but it lacked in scalability when the data is added, moved, or updated. In this paper, we propose a new architecture call Data-centric Network (DCN) that allows scalable access to dynamic data in a widely distributed environment.

Data-centric Network for Highly Distributed and Mobile Data Distribution

Daisuke Matsubara, Hitoshi Yabusaki, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Internet Architecture (IA) (北海道　札幌市　北海道大学人文・社会科学総合教育研究棟) ,

2012.03

Oral presentation (general)

Reliability Aware Topology Design Method for Energy Efficient Layer-2 Networks

Haruka Yonezu, Takashi Kurimoto, Daisuke Ishii, Satoru Okamoto, Eiji Oki, NAOAKI YAMANAKA

IEICE Technical Report on Network Systems (宮崎県宮崎市　フェニックス・シーガイア・リゾート) ,

2012.03

Oral presentation (general)

In order to reduce the energy consumption of transport/data center networks, MiDORi network technology is introduced. This network is based on a concept of aggregating traffic into specific links, and powering off interfaces of routers/switches that do not convey traffic. In this paper, we focus on an energy-optimal topology calculation method that can adjust the link reduction rate and the calculation time by setting different depth. However, there is no consideration of reliability which is a fatal issue for energy efficient networks that consist of minimal links. Therefore, two failure management methods are proposed. By computer simulation, we compared the two proposed methods from the perspective of energy efficiency and calculation time.

[Invited]Smart Network Architecture based on photonic Internet technology

NAOAKI YAMANAKA

IEICE Technical Report on Communication Systems (新潟県新潟市新潟大学駅南キャンパス「ときめいと」) ,

2012.03

Oral presentation (invited, special)

Energy serving is the one of the important issue for future network. “Green by ICT” and “Green of ICT” are two approaches for this problem. This paper shows that photonic network technology is the key technology for future green network. In addition, new Cloud type layer-3 network architecture is proposed to reduce network power.
Next, EVNO, Energy Virtual Network Operator, is new concept for smart network. This paper also describes this architecture and approach of this network.

Dynamic Topology Reconfiguration for Energy Efficient Multi-layer Network using Extended GMPLS with Link Power Control

Yuki Nomura, Haruka Yonezu, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

The Optical Fiber Communication Conference and Exposition (OFC) and the National Fiber Optic Engineers Conference (NFOEC)(OFC/NFOEC 2012) (Los Angeles Convention Center, Los Angeles, CA, USA) ,

2012.03

Oral presentation (general)

A Study on the Changeover Mechanism of Communication Path for Virtual Machine Live Migration between Data Centers

Haruki Takahashi, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

World Telecommunications Congress (WTC 2012) (Miyazaki, Japan) ,

2012.03

Oral presentation (general)

Recently, live migration which is a technology of transferring virtual machines (VMs) is used inside a data center so that data centers can manage server load balancing and energy consumption effectively. It is expected that the live migration technology is extended into Wide Area Network (WAN) between data centers in order to manage VMs more effectively. However, because the IP address of a VM changes after live migration between data centers, the problem that communications between users and VMs disconnect occurs. To solve this problem, we propose two mechanisms: “Virtual Local Area Network (VLAN) path switch mechanism using Next Generation Wide Area Layer 2 (NGL2) network” and “Exchanging destination address of VM mechanism”. In this paper, mechanisms of our proposal are explained in detail, and the mechanisms are demonstrated.

A Demonstration of IP based Multi-Service Cooperating Cloud Architectures and Technologies for Future Cloud Networking

Kenta Nakahara, Ko Kikuta, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

World Telecommunications Congress (WTC 2012) (Miyazaki, Japan) ,

2012.03

Oral presentation (general)

This paper outlines and demonstrates the authors’ view on the service model, architectural directions and key protocols for future cloud realized by utilizing the inscrutable possibility of the photonic network. It is pointed out that, driven by evolution of Cloud and Ubiquitous society, all services will be provisioned by and through an intelligent network where service resources are distributed. For this trend, we propose Multi- Service Cooperating Cloud (MSCC) provides various virtual clouds dynamically according to users’ requests by interconnecting multi service resources via network. The network architecture for realizing MSCC, which uses the network virtualization and extended IP protocol, is also introduced. The feature of our proposing architecture concept is to assign IP addresses to Service-Parts and execute MSCC service provisioning by utilizing IP mechanisms. By using IP mechanism, the construction of scalable and intelligent service network is expected.

A Study of Multicast Delivery System Using PLZT Optical Switch on Active Optical Access network

Yuji Shimada, Takehiro Sato, Kazumasa Tokuhashi, Daisuke Ishii, Masayasu Yamaguchi, Satoru Okamoto, YAMANAKA NAOAKI

World Telecommunications Congress (WTC 2012) (Miyazaki, Japan) ,

2012.03

Oral presentation (general)

We have proposed an active optical access network (ActiON) employing high-speed optical switches that ensures a higher subscriber number and longer transmission distance than those in the case of the conventional PON. Moreover, ActiON supports multicast slot allocation, which forces the switch to behave as an optical splitter. This paper introduces ActiON with variable distribution mode, which controls the distribution rate of the power. Proposed method realizes flexible multicast slot allocation according to the transmission distance from OLT to each user and the number of required users. Moreover, as the technology to realize the proposed method, this paper also shows adjusting of the proportion of optical power by applying the variable voltage to each electrode.

Service Composition System Optimizing Network and Service Resources in E3-DCN

Naohiko Shibuta, Kenta Nakahara, Kou Kikuta, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

World Telecommunications Congress (WTC 2012) (Miyazaki, Japan) ,

2012.03

Oral presentation (general)

While being the nearness of realization of ubiquitous
society, it is expected that everything will be connected to the network. We previously presented “Ubiquitous Grid Networking Environment (uGrid)”. In uGrid, everything on the network such as devices, contents, and software is defined as “Service-Part”, and users are provided with composition of the several Service-Parts on the network. In uGrid, there are “Service-Routing” and “Service-Signaling” as the method of determining the path from
source to destination and establishing the optical path by using of IP protocol. However, in uGrid, in order to provide the services for users via the specified Service-Parts, these cost of services is high. Also, since users must designate the combination of Service-Parts, it is inflexible. Then, we propose “Energy Efficient, and
Enhanced-type Data Centric Network (E3-DCN)” which is based
on uGrid. In the E3-DCN, users request contents name to the
network and receive them from the network. If the requested
contents are not found in the network, the network constructs the requested contents with Service-Parts. In addition to that, E3-DCN aims at energy efficiency. In this paper, we propose a cost reduction method by Service-Parts copy as part of E3-DCN. Cost is reduced by copying the Service-Parts which have a software function to the optimal position. This method is defined as “Service-Copy”. By the evaluation using ILP (Integer Linear
Programming), it is shown that the case with Service-Copy can reduce the total cost of service by about 12～17%.

Multi-slice Traffic Engineering Method for Optical Packet / Path Integrated Networks

Masayasu YAMAGUCHI, Daisuke ISHII, Satoru OKAMOTO, Eiji OKI, YAMANAKA NAOAKI

World Telecommunications Congress (WTC 2012) (Miyazaki, Japan) ,

2012.03

Oral presentation (general)

This paper proposes a novel traffic engineering method for improving the throughput characteristics of optical packet forwarding in an optical packet / path integrated network. This method is based on bypassing optical packets rejected from a highly-loaded optical packet switch onto one of the adjacent packet switches via an optical path to increase the network throughput. Since the formation of a bypass is equivalent to sharing the buffers of two or more optical packet switches, the packet loss rate can be reduced even by the same buffer length. Or the buffer length can be reduced to achieve the given packet loss rate.

Dynamic Topology Reconfiguration for Energy Efficient Network with Link Power Control: MiDORi

Yuki Nomura, Haruka Yonezu, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

World Telecommunications Congress (WTC 2012) (Miyazaki, Japan) ,

2012.03

Oral presentation (general)

To improve the energy efficiency of networks, power consumption should be proportional to the utilization of the network. We have proposed a concept which conducts traffic engineering in order to dynamically aggregate traffic on particular links and turn off unused links. This paper shows the demonstration results of the link power management by energy efficient network topology design with prototype Gigabit layer-2 switches. In the result, power consumption adaptively changed according to amount of traffic, and when traffic load is low, it can reduce of 23.8% of energy at maximum.

A Study on Optical Access Network Architecture and ONU Sleep Mode for Low Power Consumption

Yuki Higuchi, Yuji Shimada, Takehiro Sato, Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamoto, NAOAKI YAMANAKA

IEICE Technical Report on Photonic Network (大阪府吹田市大阪大学コンベンションセンター) ,

2012.01

Oral presentation (general)

Recently, access network consumes almost 70% electricity of the whole network in Japan, and the low-power-consumption technologies such as ONU Sleep Mode get more popular. In this study, in terms of the ONU's power consumption, we would like to propose a new ONU Sleep Mode in which OLT informs both up/down schedules before sending data so that a part of devices in ONU is able to sleep with using the schedules. Then, we discuss an AWG-PON based optical access network for low power consumption.

A Construction Method of Composite Service Tree with Consideration for Maximum Delay and Service-Parts Utilization in uGrid Video Delivering System

AlatengSongbuer, Shanming ZHANG, Kenta NAKAHARA, Ko KIKUTSA, Daisuke ISHII,Takashi KURIMOTO, Satoru OKAMOTO, NAOAKI YAMANAKA

IEICE Technical Committee on Information Networks(IN) (北海道旭川市旭川ターミナルホテル層雲の間) ,

2012.01

Oral presentation (general)

With the development of network and device technology, the era that any device can be connected to the network has been expected. So we have proposed a ”ubiquitous grid networking environment (uGrid)” to meet the era need. In uGrid, everything from a device to a program is defined as ”Service-Part”, and by combining various Service-Parts, uGrid can provide a variety of composite services to users. About the video delivery system based on uGrid, the videos, which are processed by some Service-Parts from video server, are provided to users. Therefore, it is necessary to construct the tree, which is used for picking the appropriate Service-Parts from the server to users. However, using the minimum cost paths of each user to build the minimum cost path tree, the usage of amount of Service-Parts will be increased, and the resource utilization of each Service-Part will become very low. So, in this paper, we propose a tree construction method, which ensures that the biggest delay as a prerequisite, by repeatedly running the local aggregation to improve the utilization efficiency of Service-Part. This paper also presents some evaluations which the results show that our proposal is better than traditional approach in the utilization efficiency of Service-Part.

A Fast Approximte Solution of Enery Efficient Network Topology Using Reconfigurable Processor, STP

Akiko HIRAO, Hidetoshi TAKESHITA, Haruka YONEZU, Satoru OKAMOTO, NAOAKI YAMANAKA

IEICE Technical Report on Reconfigurable System (RECONF) (神奈川県　横浜市慶応義塾大学日吉キャンパス) ,

2012.01

Oral presentation (general)

Recently, the Internet is necessary tool for our daily lives, and the number of the Internet users is increasing particularly quickly. Reflecting this trend, the amount of traffic and power consumption of network is increasing. To save the energy of network is a critical issue. One of the concepts of saving the energy is to realize a low power consumption network by aggregating traffic into specific links and powering off interfaces of routers/switches that do not carry traffic. However, a calculation method of this algorithm takes a lot of time to deal with a large network topology. In this paper, we propose a platform that processes the calculation of energy efficient topology rapidly using reconfigurable processor, STP. We use this reconfigurable device for calculation of the link utilization, it takes a lot of time of whole process of this algorithm. We show the possibility that our proposal can execute arithmetic processing faster than a usual software.

Energy Optimized Data Distribution using E3-DCN

Daisuke Matsubara, YAMANAKA NAOAKI, Satoru Okamoto

The 4th EU-Japan Symposium on the New Generation Network and the Future Internet (TKP Tokyoeki Yaesu Conference Center, Tokyo, Japan) ,

2012.01

Oral presentation (general)

[招待講演]光技術が生む, 新しいネットワーク~新しいサービスを生む省エネルギーなネットワークをもとめて~

NAOAKI YAMANAKA

第77回POFコンソーシアム(全体会議) (神奈川県　横浜市　慶應義塾大学日吉校舎) ,

2011.12

Oral presentation (invited, special)

Service composition system optimized network and service resources in E3-DCN

Naohiko Shibuta, Kenta Nakahara, Kou Kikuta, Daisuke Ishii, Satoru Okamoato, Eiji Oki, NAOAKI YAMANAKA

IEICE Technical Report on Network Systems (山口県宇部市山口大学工学部常盤キャンパス) ,

2011.12

Oral presentation (general)

我々は, サービスパーツと定義するネットワーク上のあらゆるハードウェア, コンテンツおよびソフトウェアを組み合わせ, ユーザに提供するユビキタスグリッドネットワーキング環境(uGrid) を提案している. 近年, ネットワークにコンテンツ名で要求してコンテンツを受信するData Centric Network (DCN) が広く研究されている. そこで, uGrid にDCN を拡張させたEnergy Efficient, and Enhanced-type Data Centric Network (E3-DCN) を提案する. E3-DCN では, ユーザが要求したコンテンツを必要に応じてサービスパーツを組み合わせて提供する. さらに, エネルギー効率化を目指す. 本稿ではE3-DCN の一環として, サービスパーツのソフトウェアを最適な位置に一時的にコピーすることによるエネルギー効率化手法を提案する. 整数線形計画法を用いて, サービスパーツのコピー機能の有無におけるエネルギー効率化に関して評価を行う.

GMPLS-enabled, energy-efficient, self-organized network: MiDORi

Satoru Okamoto, Yuki Nomura, Haruka Yonezu, Hidetoshi Takeshita, YAMANAKA NAOAKI

Asia Communications and Photonics Conference(ACP2011) (Shanghai International Convention Center, Shanghai, China) ,

2011.11

Oral presentation (general)

A network using minimum set of nodes and links that all communication data traffics among nodes can be carried while meeting the QoS requirements named MiDORi (Multi- (layer, path, and resources) Dynamically Optimized Routing) has been proposed. MiDORi network technologies that is composed of a low energy consumption network design tool (MiDORi path computation engine (PCE)), MiDORi Generalized Multi-Protocol Label Switching (GMPLS) protocol extensions for controlling network equipment, and a MiDORi router/switch controlled by MiDORi GMPLS, are now developing. This paper describes recent activities of the MiDORi network technologies.

Proposal of Multi-slice Traffic Engineering Method (MSTE) for Optical Packet/Path Integrated Networks

Masayasu Yamaguchi, Daisuke Ishii, Satoru Okamato, Eiji Ooki, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (東京都　目黒区　東京工業大学手島精一記念会議室) ,

2011.11

Oral presentation (general)

This paper proposes a new traffic engineering method for increasing the throughput of optical packet transmission in an optical packet / path integrated network. This method reroutes the optical packet rejected from a highly loaded optical packet switch onto one of the adjacent packet switches via an optical path to increase the network throughput. Since the formation of a detour is equivalent to sharing the buffers of two or more optical packet switches, the packet loss rate can be reduced even by the same buffer length. Or the buffer length can be reduced to achieve the given packet loss rate.

A Study of Multicast Delivery System Using PLZT Optical Switch on Active Optical Access network

Yuji Shimada, Takehiro Sato, Kazumasa Tokuhashi, Ishi Daisuke, Masayasu Yamaguchi, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (東京都　目黒区　東京工業大学手島精一記念会議室) ,

2011.11

Oral presentation (general)

Energy Saving Optical Access Network based on Hybrid Passive/Active Architecture

Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamato, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (東京都　目黒区　東京工業大学手島精一記念会議室) ,

2011.11

Oral presentation (general)

This paper proposes an energy saving optical access network based on hybrid passive/active architecture. Thanks to using waveguide optical switch with nanosec order switching speed, several of PON trees are aggregarted to a few OLTs when the network supports a low number of registered Optical Network Units (ONUs) or low loaded. The proposed system reduces energy consumption of OLT while improving fairness of transmission rate between subscribers. Moreover, the merit of using optical switches is to realize fast fiber and OLT protection/restoration. We aim for a flexible network by the combine the merit of passive and active system.

Future Service Adaptive Access/Aggregation Network Architecture

Hiroki Ikeda, Hidetoshi Takeshita, Satoru Okamoto, YAMANAKA NAOAKI

14th Annual International Conference on Next Generation Internet and Related Technologies(MPLS2011) (Washington, DC) ,

2011.10

Oral presentation (general)

We propose service adaptive access/aggregation network architecture which unifies various kinds of service networks into single access/aggregation network. Proposed access/aggregation network unifies leased line networks, micro data center networks, Internet networks, and mobile backhaul networks, etc. To simplify the network structure, proposed network unifies various kinds of service networks, realizes long reach transmission and accommodation of large number of users. Some of the services, for example a leased line service, require high reliable transmission and various kinds of QoS. To realize these requirements, we propose programmable OLT/ONU technology and utilization of MPLS-TP. MPLS-TP has already emerged in core network. So MPLS-TP can control through access network to core network by proposed network. Therefore, end to end high reliability and multi QoS transmission is realized.

Development of the MiDORi Ethernet Switch Prototype Systems

Satoru Okamoto, Hidetoshi Takeshita, Yuji Oikawa, Daisuke Ishii, YAMANAKA NAOAKI

IEICE Society Conference (北海道札幌市北海道大学) ,

2011.09

Oral presentation (general)

我々は, トラヒックエンジニアリング(TE)によりネットワークのトラヒックを片寄し, 未利用リンクを積極的に削減していくネットワーク的な省電力化のアプローチ MiDORi (Multi-(layer, path, and resources) Dynamically Optimized Routing) を提案し, 最小消費電力トポロジーの導出手法, MiDORi Path Computation Engine (PCE)としての実装, GMPLS (Generalized Multi-Protocol Label Switching)制御プロトコルへのMiDORi拡張提案等を進めている. 今回, MiDORi PCEと連携して, TEによる省電力効果を確認するために, 省電力機能を有するMiDORiイーサネットスイッチプロトタイプを開発した結果を報告する.

Smart Grid Network Architecture with New Fair Demand Reservation Algorithm

Soushi Yamamoto, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (北海道函館市　勤労者総合福祉センター) ,

2011.08

Oral presentation (general)

A Study on Power Source Selection Scheme for Minimization of Transmission Loss on Smart Grid Network

Soushi Yamamoto, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

The 6th IEICE Student Workshop on Photonic Network (Hokkaido, Japan) ,

2011.08

Oral presentation (general)

In this manuscript, the discussion about a power source selection scheme is described to minimize transmission loss in the future smart grid network where energy is traded directly between suppliers and consumers.As the future smart grid platform, we have proposed Energy Virtual Network Operator (EVNO) which controls the matching of suppliers and consumers virtually.EVNO provides low-cost power transmission by selecting an optimal power supplier for each consumer in consideration of time domain and space domain. Challenges of the power source selection scheme in EVNO are clari ed.

A Study of Scalable Dynamic Bandwidth Allocation in Optical Aggregation Network

Yuji Shimada, Takehiro Sato, Kunitaka Ashizawa, Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (Wakayama, Japan) ,

2011.06

Oral presentation (general)

Recently,the power consumption of Internet is increasing rapidly. Thus,we have been proposing an optical aggregation network,which reduces the power consumption of today's Internet greatly. The optical aggregation network connects solitary giant router and thousands of users in transparent 1-hop network. This research proposes new dynamic bandwidth allocation. The propose scheme groups ONUs by considering their distances from OLT (Optical Line Terminal), and calculates their bandwidth allocated to one group while other groups are sending data to OLT. Evaluation shows the proposed scheme achives high bandwidth utilization.

Highly-accurate Short-term Forecasting Photovoltaic Output Power Architecture without Meteorological Observations in Smart Grid

Jun Matsumoto, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

1st International Symposium on Access Spaces (IEEE-ISAS 2011) (Yokohama, Japan) ,

2011.06

Oral presentation (general)

We propose a forecasting architecture of near future photovoltaic output power based on the multipoint output power data via smart meter. The conventional forecasting methods are based on the analysis of meteorological observation data, and need the implementation of dedicated meters and the connection to them. Moreover, highly-accurate forecasting(in second-scale, or meter-scale) is difficult in the conventional methods. Our proposed method is based on not meteorological observation data but the actual measured output power data by using the solar panels connected with a smart meter as sensing units. A forecasting calculation server interpolate spatially the actual measured data collected from multipoint, and forecasts near future output power in each point using optical flow estimation. Virtual sampling technique involves the forecast performance when the sampling point is sparse. We show the forecasting method achieves high accuracy of less than 5% error rate by the computer simulation.

IP based Service Mash-up Provision by uGrid

Kenta Nakahara, Kou Kikuta, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

7th International Conference on IP+Optical Network (iPOP2011) (NEC Tamagawa Plant, Kawasaki, Kanagawa, Japan) ,

2011.06

Poster presentation

With the advance of the ubiquitous society by shift to IPv6, it is expected that various devices such as cars, home electronics, sensors, tags, and so on will be allocated IP address and connected to the network environment. On the other hand, Cloud computing is attracting the world. Cloud computing, via Internet, provides computation, software, data access, and storage services that do not require end-user knowledge. Then, we have been proposing IP based uGrid (ubiquitous Grid Networking Environment). In uGrid, everything connected to the network is defined as “Service-Part” and assigned IP address. Service-Parts mean not only devices but also software programs and data functions which are virtually “things”. Users can use Service-Parts all over the world. Moreover, by combining various Service-Parts via network, uGrid can provide new mash-up services. Figure 1 shows a concept of IP based uGrid. By connecting several IP addresses, the mash-up service of Service-Parts is realized. Because uGrid manages Service-Parts and executes uGrid service provisioning based on IP address, we utilize the IP mechanism such as routing, signaling, and DNS. The merit of utilizing IP mechanism is that, IP is an originally scalable mechanism, and many sophisticated technologies accumulated for years are available. As a technology to manage Service-Parts with IP addresses, GMPLS is applicable. GMPLS is a suite of protocols which allows automate the provisioning and management of the network. Originally, GMPLS was proposed to generalize MPLS for packet switched network to other networks with different switching capabilities like TDM, lambda, fiber, and so on. Our motivation is to extend this “generalized” from switching capability (network, data link, and physical layer) to Service-Parts (application layer). In this research, extended routing protocol (Service-Routing) and extended signaling protocol (Service-Signaling) are proposed. Service-Routing searches Service-Parts and calculates the route for service mash-up. Service-Signaling executes reservation of Service-Parts resources and the establishment of the connection among Service-Parts. By experiment, it is shown that the combination of Service-Routing and Service-Signaling was succeeded. This technology can realize next generation inter-Cloud which integrates the various Cloud such as SaaS, PaaS and HaaS/IaaS. By interconnecting various IP addresses of services via high-speed and high-capacity optical path, mash-up of service, as if executed in one server without considering the network distance, in cloud network can be realized.

A Study of Slot Switching-based All-optical Service Aggregation Network

Takehiro Sato, Kunitaka Ashizawa, Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

7th International Conference on IP+Optical Network (iPOP2011) (NEC Tamagawa Plant, Kawasaki, Kanagawa, Japan) ,

2011.06

Poster presentation

We propose a slot-switching based all-optical network to support various network services. Aggregating various types of networks (e.g., access networks for residential users, leased lines for business users, mobile backhauls, and fibre channels for data centers) in a single network is discussed as a candidate of next generation access network. Figure 1 shows the concept of this network. There are virtual OLTs (Optical Line Terminals) in a solitary programmable OLT and each of them provides different services at respective protocols. By integrating network equipments, this network reduces energy consumption drastically. It also facilitates the introduction of new network services which use their own protocols. The simplest way to realize this network is using WDM (Wavelength Division Multiplexing) and allocating each wavelength to each network service. However, this method has low scalability because the number of wavelengths that are able to multiplex in a single fiber is limited. In addition, CAPEX (CAPital EXpenditure) becomes high because it is necessary to develop various types of transceivers that adapt different wavelengths respectively. Our proposed network is an expansion of Active Optical access Network (ActiON) that we have proposed earlier, and uses high-speed optical switches. As shown in Figure 2, this network has capability to transfer any data signal formats transparently in a single wavelength. The bandwidth is shared by all users and dynamically allocated by fixed-length time slots. In this presentation, we mainly discuss the network architecture.

Live Data Center Migration over Next Generation Layer2 Network

Haruki Takahashi, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

7th International Conference on IP+Optical Network (iPOP2011) (NEC Tamagawa Plant, Kawasaki, Kanagawa, Japan) ,

2011.06

Poster presentation

Recent years, cloud computing which provides computational resources via Internet is attracting the world. Electricity consumption of data centers increases rapidly because the number of users of data centers increases with the growth of cloud computing. According to the world wide trend which urges growing out of dependence on fossil fuel and nuclear energy, it is hoped to consume electricity effectively and wisely. Then, we propose Live Data Center Migration, which can use electricity wisely because functions of data centers are transferred to other data centers geographically apart. For this proposal, we expand the live migration technology into wide area. This technology is originally used inside a data center, and able to transfer virtual machines from the server to another without stopping processes of the virtual machines. Fig. 1 shows the basic concept of our proposal network. The networks among the data centers are set up over the NGL2 (New Generation Layer 2) network with GMPLS (Generalized Multi-Protocol Label Switching) before the virtual machines migration. During the live migration, the memory images of the virtual machines are transferred via this network. The routes between users and data centers have to be switched smoothly after the virtual machine migration. There are two methods to solve this problem. The first is that, packets arrived at DAT (Dynamic Address Translation) are encapsulated with the header addressed to the data center, and transferred via Internet. The route can be switched due to changing the destination address of capsulation header. The other is that, packets arrived at NGL2 switch are added VLAN (Virtual LAN) tags, and transferred via the NGL2 network. It is necessary to set up VLAN path between users and data centers in advance and the route can be switched due to changing VLAN tag. The proposed system is implemented as shown in Fig.2. In this presentation, we mainly discuss the protocol of how to set up the networks among data centers and how to switch the routes between users and data centers.

A Study of Next Generation Metro-Access Hybrid Scalable Network by Using PLZT Ultra High Speed Optical Wavelength Selective Switch

Yutaro Hara, Takehiro Sato, Yuji Shimada, Kunitaka Ashizawa, Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

1st International Symposium on Access Spaces (IEEE-ISAS 2011) (Yokohama, Japan) ,

2011.06

Oral presentation (general)

We have studied a novel optical access network with PLZT (Plomb Lanthanum Zirconate Titanate) optical switches,called ActiON (Active Optical Network), as a next generation access network to replace PON (Passive Optical Network). On the other hand, energy consumption of the present network becomes an important problem today. To resolve this problem, we study an energy efﬁcient metro-access hybrid network by using ActiON. Also, it is necessary to extend a bandwidth capacity of ActiON to realize a scalable network. In this paper, we mainly focus on an energy consumption and a scalability. As a result, the proposed next generation metro-access hybrid scalable network accommodates 600000 users. In the evaluation, we show that proposed network reduces 65 % of energy consumption compare to the present network. Furthermore, blocking ratio of proposed network is lower than a quality assurance of the Internet service in any cases.

High energy-efficient IP network architecture with Giant Center Router and Optical Aggregation Network

Hidetoshi Takeshita, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

1st International Symposium on Access Spaces (IEEE-ISAS 2011) (Yokohama, Japan) ,

2011.06

Oral presentation (general)

This paper proposes high energy-efficient IP network architecture with Giant Center Router and Optical Aggregation Network. User IP packets are aggregated and transferred to Giant Center Router through Optical Aggregation Network transparently by dynamic optical resource allocation. Giant Center Router is power scalable with an amount of traffic proportionally. Optical Aggregation network is realized by circuit switches, wavelength converters, and wavelength multiplexers/ demultiplexers. The proposed network scheme reduces the power consumption to 1/20-1/30 compared to the conventional Internet, realizes a network structure well suited to traffic centralization, and offers smooth migration from the conventional Internet.

Scalable Multi-Path Discovery Technique for Parallel Data Transmission in Next Generation Wide Area Layer-2 Network

Jumpei Marukawa, Yuki Nomura, Shota Yamada, Midori Terasawa, Satoru Okamoto, YAMANAKA NAOAKI

1st International Symposium on Access Spaces (IEEE-ISAS 2011) (Yokohama, Japan) ,

2011.06

Oral presentation (general)

This paper focuses on parallel data transmission, which is one of the solutions in considering high-speed transmission in next generation wide area layer-2 network. To realize parallel data transmission, reliable delay and route measuring for every possible path between two nodes and choosing multiple paths with small delay difference is necessary. This paper proposes a new multipath discovery and delay measurement method using bi-directional flooding technique. In the proposed method, extended Ethernet frame and bi-directional flooding technique which runs on data plane is introduced. The computer simulation showed that by applying the proposed bi-directional flooding technique, scalability has been greatly increased.

A Design Method of High-availability and Low-optical-loss Optical Aggregation Network Architecture

Takehiro Sato, Kunitaka Ashizawa, Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

1st International Symposium on Access Spaces (IEEE-ISAS 2011) (Yokohama, Japan) ,

2011.06

Oral presentation (general)

A highly-energy-efficient network using an optical aggregation network and a service cloud has been proposed to reduce the power consumption of today’s Internet greatly. The optical aggregation network connects a solitary giant router to users by logical tree topology. This paper proposes a novel optical aggregation network architecture. The proposed architecture uses 2x2 optical switches and combines the features of a tree topology and a ring topology. The paper also introduces a design method of the proposed network architecture. It is shown that the method can design high-availability and low-optical-loss network with fewer optical switches compared to a duplex tree topology.

Experiment of the New Generation Wide-Area Layer-2 Networks over Terabit-LAN Systems

Satoru OKAMOTO, Daisuke ISHII, YAMANAKA NAOAKI

IEICE General Conference (Tokyo City University, Tokyo, Japan) ,

2011.03

Oral presentation (general)

Demonstration of the Self Organized Dynamic Link Power Management by “MiDORi” Energy Optimal Network Topology Design Engine

Hidetoshi Takeshita, Yuji Oikawa, Haruka Yonezu, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

The Optical Fiber Communication Conference and Exposition (OFC) and the National Fiber Optic Engineers Conference (NFOEC 2011) (Los Angeles Convention Center, Los Angeles, CA, USA) ,

2011.03

Oral presentation (general)

A Study of Fast Fault Recover Method using k-Hop Flooding for Wide Area Layer2 Network

Rumi AKIMUNE, Jun MATSUMOTO, Jumpei MARUKAWA, Takashi KURIMOTO, Daisuke ISHII, Satoru OKAMOTO,YAMANAKA NAOAKI

IEICE Technical Report on Communication Systems (Okinawa, Japan) ,

2011.03

Oral presentation (general)

A fast fault recovery method using temporary forwarding of frames has been proposed for wide area layer 2 network with high reliability. In the conventional method, the fault detection nodes forward frames based on pre-established recovery table when a fault occurs. The tables, however, are created without consideration on destination node of path, the frames are dropped before the arrival to the destination node. In this paper, a new fast fault recovery method using k-hop flooding is proposed for decrease in frame losses with no arrival to destination node. The proposed method can decrease frame losses with forwarding from fault detection nodes to all neighbor nodes. By computer simulation, it is shown effective range in proposed method from several perspectives.

A Study of Next Generation Metro-Access Hybrid Scalable A Study of Next Generation Metro-Access Hybrid Scalable Network by Using PLZT Ultra High Speed Optical Wavelength Selective Switch

Yutaro HARA, Yuji SHIMADA, Takehiro SATO, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO,YAMANAKA NAOAKI

IEICE Technical Report (Okinawa, Japan) ,

2011.03

Oral presentation (general)

We study a novel optical access network with active optical switches, called ActiON (Active Optical Network), as a next generation access network to replace PON (Passive Optical Network). In this paper, we focus on a scalability of ActiON so that it accommodates 600000 users to propose next generation metro-access hybrid scalable network by using PLZT optical wavelength selective switch. In the evaluation, we discuss about energy consumption and blocking ratio. We show that proposed network reduces 65 % of energy consumption compare to the present network. Furthermore, blocking ratio of proposed network is always lower than a quality assurance of the Internet service.

Future Smart Network Architecture based on photonic Internet technology

YAMANAKA NAOAKI

IEICE Technical Report (Okinawa, Japan) ,

2011.03

Oral presentation (general)

An Implementation of Optical Multicast Delivery System Using PLZT Optical Switch

Takehiro SATO, Yuji SHIMADA, Yutaro HARA, Johan RENGSTEDT, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Student Workshop on Photonic Network (Kagoshima, Japan) ,

2011.02

Oral presentation (general)

Path Reconfiguration Method Using Next Hop Table for Autonomous GMPLS Control in Energy Efficient Network MiDORi

Yuki NOMURA, Jumpei MARUKAWA, Haruka YONEZU, Hidetoshi TAKESHITA, Yuji OIKAWA, Daisuke ISHII, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (Kagoshima, Japan) ,

2011.02

Oral presentation (general)

With the advance of ubiquitous society including IPv6, it is expected that everything will be connected to the networking environment. Then, a ubiquitous grid networking environment (uGrid) has been proposed. In uGrid, everything from a device to a program is defined as “Service-Part”, and new mash-up services can be provided by connecting several Service-Parts. In this paper, IP Routing/Signaling-based uGrid service provisioning is proposed as a new concept for realizing uGrid. The feature of this concept is to assign IP addresses to Service- Parts and execute uGrid service provisioning in the network layer (IP protocol layer). IP protocol is an originally scalable protocol. Also, many sophisticated technologies accumulated for years can be used in IP protocol. Therefore, by using IP protocol, the construction of scalable and intelligent uGrid is expected. As key techniques, Service Routing and Service Signaling are introduced, and the issues of each technique are listed. By experiment, it was confirmed that the provisioning of a simple video grid service was succeeded by Service Signaling.

A Design Method of Large Scale Optical Switching Network with Low Optical Loss and High Reliability

Takehiro SATO, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO, Eiji OKI,YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (Kagoshima, Japan) ,

2011.02

Oral presentation (general)

現在のインターネットの消費電力を大幅に削減する手法として, 1台の大容量ルータと数千から数万のユーザを1ホップで接続する光アグリゲーションネットワークが提案されている. 本研究では, 多段に接続した2x2PLZT光スイッチを用い, ツリー型トポロジとリング型トポロジの特徴を組み合わせることにより, 低光損失および高信頼性を満足する全光アグリゲーションネットワークを構築する手法について検討を行った.

A Novel IP Routing/Signaling Based Service Provisioning Concept for Ubiquitous Grid Networking Environment

Daisuke Ishii, Kenta Nakahara, Satoru Okamoto,YAMANAKA NAOAKI

IEEE Globecom 2010 Workshop on Ubiquitous Computing and Networks (UbiCoNet2010) (Miami, Florida, USA) ,

2010.12

Oral presentation (general)

Next Generation High-reliable Optical Access Network Using Ultra-high Speed Optical Switches

Takehiro SATO, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO, YAMANAKA NAOAKI

The 7th IEEE Tokyo Young Researchers Workshop (Tokyo Tech Front,Tokyo Institute of Technology,Tokyo,Japan) ,

2010.11

Poster presentation

We have proposed a novel access network system using ultra-high speed optical switches, called ActiON (Active Optical Network). Compared to PON (Passive Optical Network), which is widely used as an access network today, ActiON can increase the number of subscribers and the transmission distance by applying optical switches. ActiON resolves digital divide issues because it covers mountain areas or highly-populated areas such as China, where are difficult to be supported by PON. In addition, various services are provided to subscribers through optical access networks in recent years, including lifeline services such as a telephone service and mission-critical services such as a business transaction. High reliability is a very important issue for the next generation optical access network, because users of these services suffer a heavy loss when a failure occurs on the network. In this presentation, we focus on improvement of reliability and propose novel protection schemes for ActiON. We show that optical switches enable ActiON to implement redundancy configuration flexibly and realize a cost-effective protection.

A Proposal of A uGrid Video Delivery System Considers Connection Stability

AlatengSongbuer, Kenta Nakahara, Shota Yamada, Ko Kikuta, Satoru OKAMOTO, YAMANAKA NAOAKI

The 7th IEEE Tokyo Young Researchers Workshop (Tokyo Tech Front,Tokyo Institute of Technology,Tokyo,Japan) ,

2010.11

Poster presentation

In the ubiquitous society that obtains a huge address space by making to IPv6, it is assumed that all devices are connected to the network. We propose that the devices connected to the network are defined as “Service-Part” in Ubiquitous Grid Network Environment (uGrid), and the users can provide new services by selecting desired Service-Parts and combining. However, a number of users’ accessing popular Service-Parts can occur load concentration. And so, load distribution of Service-Parts become possible by advertising the user who connect to the Service-Parts as new Service-Parts, and connecting between users. However, the services of the users who connect with the relay users are interrupted if the relay users secede suddenly. Especially, the video delivery system becomes a major issue especially. In the present study, it proposes the video delivery system to consider connection stability.

Ultra High Speed Wavelength Selective Switching Technique for Optical Aggregation Network

Yutaro HARA, Yuji SHIMADA, Takehiro SATO, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO, YAMANAKA NAOAKI

The 7th IEEE Tokyo Young Researchers Workshop (Tokyo Tech Front,Tokyo Institute of Technology,Tokyo,Japan) ,

2010.11

Poster presentation

The Internet is composed by many routers. On the other hand, energy consumption of all routers in the Internet is an important problem. Because of increasing the transmitting speed, it reached 7.3TW/h in 2008, and now, it reaches 13TW/h in 2010. Thus, we have proposed the Optical Aggregation Network which aggregates many routers into one cloud router and creates a simple tree-based network for reducing the energy consumption of all routers intensively for saving earth. In this presentation, we propose ecological scalable WDM Network by using PLZT optical WSS (Wavelength Selective Switch) for implementing the Optical Aggregation Network. This PLZT WSS has slot switching function. Therefore, it could extend the distance of network and could add more subscribers to implement ecological scalable network.

A Study on Intermediate Network Structure between Data Centers for a Intelligent Cloud Network using Parallel Transmission System

Shota Yamada, Kenta Nakahara, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

The 7th IEEE Tokyo Young Researchers Workshop (Tokyo Tech Front,Tokyo Institute of Technology,Tokyo,Japan) ,

2010.11

Poster presentation

Energy Optimal Network Topology Design Method by QoS Aware Link Power Management

Haruka Yonezu, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

The 7th IEEE Tokyo Young Researchers Workshop (Tokyo Tech Front,Tokyo Institute of Technology,Tokyo,Japan) ,

2010.11

Poster presentation

Study on the Virtual Machine Migration Scheme for the Realization of Follow the SUN Data Center

Haruki Takahashi, Hidetoshi Takeshita, Daisuke Ishii, Satoru Okamoato,YAMANAKA NAOAKI

IEICE Technical Report (東京都文京区日本女子大学目白キャンパス) ,

2010.11

Oral presentation (general)

Recent years, the power supply becomes a problem because the number of users of the data center increase rapidly as cloud computing develops. In the world wide trend getting rid of fossil fuel and nuclear energy, it is hoped to use the photovoltaic power generation which is natural energy effectively. But, it is impossible to provide services at nighttime. By moving virtual machines according to the motion of the sun, the photovoltaic natural energy can be used effectively. Then, we aim at the realization of Follow the SUN Data Center which sends and receives virtual machines between geographically away data centers. In this paper, we consider the virtual machine migration scheme using existing techniques which solve the communication continuity problem between user and virtual machine. Also, we compare existing techniques, and we consider the possibility of realizing Follow the SUN Data Center.

Proposal of the MiDORi GMPLS Traffic Engineering for Energy Optimal Traffic Controlled Networks

Satoru Okamoto, Ko Kikuta, Daisuke Ishii, Eiji Oki, YAMANAKA NAOAKI

13th Annual International Conference on Next Generation Internet and Related Technologies(MPLS2010) (Washington, DC) ,

2010.10

Oral presentation (general)

This presentation describes newly developed GMPLS extensions for realizing energy optimal traffic engineering technologies. We are developing “MiDORi (Multi- (layer, path, and resources) Dynamically Optimized Routing) Network Technologies” that is composed of a low energy consumption network design tool (MiDORi PCE), GMPLS extensions (MiDORi GMPLS) for controlling network equipment and a MiDORi router/switch controlled by MiDORi GMPLS. “midori” is a Japanese word which means “green” in English. In the presentation, the detail GMPLS extensions (OSPF extension, RSVP extension, and LMP extension) and experimental results of MiDORi Network Technologies will be presented.

QoS Aware Energy Optimal Network Topology Design and Dynamic Link Power Management

Haruka Yonezu, Ko Kikuta, Daisuke Ishii, Satoru Okamoto, Eiji Oki, YAMANAKA NAOAKI

36th European Conference and Exhibition on Optical Communication (ECOC2010) (Torino, Italy) ,

2010.09

Oral presentation (general)

The proposal of Service Gateway redundant mechanism

Takashi Kurimoto, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Society Conference (大阪府堺市) ,

2010.09

Oral presentation (general)

Addressing Scheme of the New Generation Wide-Area Layer-2 Networks

Satoru Okamoto, Ko Kikuta, Daisuke Ishii,YAMANAKA NAOAKI

IEICE Society Conference (大阪府堺市大阪府立大学) ,

2010.09

Oral presentation (general)

イーサネットサービスの高度化に伴いキャリアグレードイーサネットを凌駕する次世代広域レイヤ２網が求められている. 我々は, イーサネットをベースとした新たなレイヤ２プロトコル技術(New Generation Layer-2: NGL2)を提案し, 要素技術の開発及びプロトタイプシステムでの実証実験を進めてきた. 本論文では, NGL2におけるアドレス割当手法, パス設定時のシグナリングにおけるユーザサイドクロスコネクション設定手法を検討した結果を述べる.

Addressing and edge node cross-connection indication method of the new generation wide-area layer-2 networks

Satoru Okamoto, Ko Kikuta, Daisuke Ishii,YAMANAKA NAOAKI

IEICE Technical Report (北海道虻田郡洞爺観光ホテル) ,

2010.09

Oral presentation (general)

As increasing Ethernet service users and enhancing service functions, a new generation wide-area layer-2 network (NGL2) beyond the state-of-the-art carrier grade Ethernet is expected. For realizing the next generation layer-2 network, we have proposed new layer2 protocol technologies based on Ethernet technologies and have developed prototype systems. In this article, a newly developed layer-2 address (MAC address) assignment policy will be described. And, user side cross-connection setting scheme for setting up end-to-end layer-2 path will be proposed.

Realizing the Scalable Service Provisioning in Ubiquitous Networking Environment(uGrid) by Extending Routing Protocol

Kenta Nakahara, Kou Kikuta, Shota Yamada, Daisuke Ishii, Satoru Okamoto,YAMANAKA NAOAKI

IEICE Technical Report (宮城県仙台市東北大学) ,

2010.09

Oral presentation (general)

With the advance of ubiquitous society, it is expected that everything will be allocated IP address and connected to the network. In a ubiquitous grid networking environment(uGrid) we have proposed, we define not only devices but also program functions and contents as “Service-Part” by allocating IP address. uGrid provides mush-up desired service for users along the flow of service by interconnecting various Service-Parts. Because we allocate IP address to Service-Parts we can manage Service-Parts within Network layer. Then, we propose a new system “Service-Routing” by which service provision in uGrid scales all over the world. In proposal, we propose the Network System where Service-Parts advertise the Service Cost in the same way routers advertise the link cost, which is feasible by extending OSPF. By calculating the route of the flow of service in this system, appropriate service provision that is not achievable with application layer can be realized. Thus, additionally, we propose routing scheme of flow of service by ILP(integer linear programming) and extending Dijkstra method. We evaluated the effectiveness of proposal by computer simulation.

MiDORi: Energy efficient network based on optimizing network design tool, remote protocol and new layer-2 switch

YAMANAKA NAOAKI, Hidetoshi Takeshita, Satoru Okamoto, Shan Gao

9th International Conference on Optical Internet (COIN 2010) (The Shilla Jeju, Korea) ,

2010.07

Oral presentation (general)

Extended MPCP Slot Data Transmission Experimental System for Active Optical Access Network

Kazumasa Tokuhashi, Takehiro Sato, Kunitaka Ashizawa, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

15th OptoElectronics and Communications Conference (OECC2010) (Sapporo, JAPAN) ,

2010.07

Oral presentation (general)

GMPLS aware intelligent cloud network

Shota Yamada, Jumpei Marukawa, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

6th International Conference on IP+Optical Network (iPOP2010) (Musashino-shi, Tokyo, JAPAN) ,

2010.06

Oral presentation (general)

With the appearance of the cloud network, high speed data communication among data centers is necessary. However, because the data is transmitted through the Internet, network bandwidth is not enough. To construct large bandwidth WAN at low cost, we propose an Intelligent Cloud Network. Fig.1 shows basic concept of the Intelligent Cloud Network. In the Intelligent Cloud Network, data delivered with parallel transmission and lower cost private lines that are lower bandwidth are applied as multiple routes. In this paper, we propose parallel transmission system. In this system, parallel routes are set up with GMPLS. Under the GMPLS environment, OSPF is used on the control plane. Every node in proposal environment can realize the network topology in order to advertise and exchange the route information to each other. In the proposed system, OSPF is used to discover the multi-path between two TCP over SCTP adaption gateways and RSVP plays a role to establish parallel routes between two gateways. The proposed system is implemented on the software switch, as shown in Figure2, and end-to-end throughput is evaluated.

Efficient Singlecast / Multicast Method For Active Optical Access Network Using PLZT High-speed Optical Switches

Kunitaka Ashizawa, Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamoto, Naoaki Yamanaka, Eiji Oki

High Performance Switching and Routing(HPSR2010) (Richardson, Texas, USA) ,

2010.06

Oral presentation (general)

We propose a new efficient singlecast / multicast method for active optical access network using PLZT 10 nsec high-speed optical switches. The Active Optical Network, called ActiON, has been proposed using slot type switched optical network. Compared with Passive Optical Network (PON), ActiON can quadruplicate the number of subscribers (128 users) per OLT and double the maximum transmission distance (40 km) between OLT and ONUs. However, ActiON uses slot based switching method, so it is difficult to realize the multicast delivery. In this paper, we propose the efficient singlecast / multicast method for ActiON by using PLZT optical switch elements which are controlled as ”distribution mode” like an optical splitter by applying mid-control voltage. In addition, a new efficient multicast slot allocation method is proposed and formulated as a linear programming problem. This formula develops the maximum number of users which is able to be connected by multicast and the minimum number of slots is used for multicast users.

Low Bandwidth Consumption Multicast Fingerprinting by using Multi P2MP LSPs in MPLS Network

Jun Matsumoto, Shan Gao, Sho Shimizu, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report (青森県十和田市奥入瀬渓流ホテル) ,

2010.04

Oral presentation (general)

This paper proposes the method for multicast fingerprinting by using multi P2MP LSPs in MPLS Network. Multicast fingerprinting technology achieves the saving of bandwidth consumption and the tracing traitors simultaneously. While the conventional method based on encryption has the shortcomings in bandwidth consumption on entire network and traceability for traitors, our proposed method improves those two elements since useless block transfers are not occurred at all. Computer simulations show that the proposed method excels in the bandwidth consumption.

High-speed Energy Efficient Topology Calculation Method by Link Power Management

Haruka Yonezu, Gao Shan, Sho Shimizu, Daisuke Ishii, Satoru Okamoto, Eiji Oki,YAMANAKA NAOAKI

IEICE Technical Report (青森県十和田市奥入瀬渓流ホテル) ,

2010.04

Oral presentation (general)

In order to reduce the energy consumption of the network, we introduce a concept that realizes a low power consumption network by aggregating traffic into specific links and powering off interfaces of routers/switches that do not convey traffic. Conventionally, a calculation method to derive an optimum topology by examining all combinations of link ON/OFF patterns was proposed. However, it is time consuming and is unsuitable for large networks. In this paper, we propose a network topology calculation method that can derive an optimal power consumption network within practical time. By iterating the process of powering off one or two links in a heuristic manner, an optimal power consumption topology can be constructed. By computer simulation, it is shown that the proposed scheme is effective from several perspectives.

Implementation of Multi-Path Discovery Approach to Software Switch

Jumpei Marukawa, Shota Yamada, Midori Terasawa, Sho Shimizu, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report (沖縄県石垣市大濱信泉記念館) ,

2010.03

Oral presentation (general)

広域イーサネット網における広帯域経路を実現する手段の一つとして, 並列伝送技術が挙げられる[1].エンドノード間で複数のVLANパスを確立した後, フロー内の各フレームに対してVLAN IDをラウンドロビンで付与し, 対応するVLANパスに転送することで, フローの使用可能帯域上限を全リンク帯域にすることが可能である.複数パス経路のアグリゲーションにより仮想的な大容量データ伝送を実現する次世代広域イーサネットにおいて, 経路間での遅延差を考慮した複数パス経路の同時発見を実現するには, 拡張イーサネットフレームフラッディング手法に基づいた経路発見手法が有効である. 本稿では, 複数経路における経路情報測定のソフトウェアスイッチであるClickへの実装方法を報告する.

A Protection Scheme with Double Optical Trees in Active Optical Access Network

Takehiro SATO, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO,YAMANAKA NAOAKI

IEICE Technical Report (沖縄県石垣市大濱信泉記念館) ,

2010.03

Oral presentation (general)

A Study of the Parallel Transmission System in Intelligent Cloud Network

Shota Yamada, Jumpei Marukawa, Daisuke Ishii, Satoru Okamoto,YAMANAKA NAOAKI

IEICE Technical Report (沖縄県石垣市大濱信泉記念館) ,

2010.03

Oral presentation (general)

クラウドネットワークの登場により, データセンタ間における高速な通信が必要となっているが, 従来のインターネットを介した通信では, 帯域幅が不十分であるという問題点がある. そこで我々は, 安価な専用線を複数使用し並列伝送を行うことにより擬似的に広帯域な WAN を構築するインテリジェントクラウドネットワークの提案を行っている. インテリジェントクラウドネットワークとは, 複数のデータセンタ間を接続先や帯域を適応的にフレキシブルに接続可能な, 超大容量の疑似専用線を安価に提供するクラウドネットワークである. 我々は以前, インテリジェントクラウドネットワークに適用させる並列伝送方式として TCP over SCTP Parallel を提案したが, いまだ様々な課題が存在する. 本稿では, 動的な並列本数変更機能の実装における諸課題, および並列伝送時の障害回復機能の実装に対する検討を報告する.

Study of Multiple Path Discovery Approach for Mass Data Transmission in Next Generation Wide Area Layer2 Network

Jumpei Marukawa,Shota Yamada,Midori Terasawa,Sho Shimizu,Daisuke Ishii,Satoru Okamoto,YAMANAKA NAOAKI

IEICE Technical Report (沖縄県石垣市大濱信泉記念館) ,

2010.03

Oral presentation (general)

Currently, bandwidth allocation of VLAN path in Wide Area Ethernet depends on link bandwidth. Aggregation of multiple end-to-end paths is effective to avoid this limit. This paper proposes multiple independent paths discovering method using extended Ethernet frame flooding technique in next generation Wide Area Ethernet which virtually enables high capacity transmission by aggregating multiple paths. Implementing the algorithm to software switches and evaluates the delay of discovered multiple paths.

Agenda for Implementation of Protection Scheme on Active Optical Access Network

Takehiro SATO, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO,YAMANAKA NAOAKI

IEICE Technical Report (沖縄県石垣市大濱信泉記念館) ,

2010.03

Oral presentation (general)

A Study of the Parallel Transmission System in Intelligent Cloud Network

Shota Yamada, Jumpei Marukawa, Daisuke Ishii, Satoru Okamoto,YAMANAKA NAOAKI

IEICE Technical Report (沖縄県石垣市大濱信泉記念館) ,

2010.03

Oral presentation (general)

A Study of Parallel Transmission Technique with GMPLS in Intelligent Cloud Network

Shota Yamada, Jumpei Marukawa, Daisuke Ishii, Satoru Okamoto,YAMANAKA NAOAKI

IEICE Technical Report (沖縄県石垣市大濱信泉記念館) ,

2010.03

Oral presentation (general)

Point-to-Multipoint VLAN path signaling demonstration on the GMPLS controlled Ethernet test network

Kou Kikuta, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

The Optical Fiber Communication Conference and The National Fiber Optic Engineers Conference(OFC/NFOEC 2010) (SAN DIEGO, CALIFORNIA, USA) ,

2010.03

Oral presentation (general)

A study on power optimization with inter-zone optimization and inter-area optimization

Sho Shimizu, Hidetoshi Takeshita, Haruka Yonezu, YAMANAKA NAOAKI

IEICE General Conference (宮城県仙台市　東北大学) ,

2010.03

Oral presentation (general)

Increasing the energy consumption is one of main concern of our recent society. To reduce the environmental load and solve the energy consuming problem, we have to take advantage of highly developed communication technology. This paper focuses on a new control network architecture for power grids. Conventional power grid is optimized for large power plant model, but a new type of power grid, which is called smart grid, have to be optimized for small power source such as solar power or wind power. In this situation, optimization mechanism of total power consumption by controlling the grid is required. In this paper, inter-zone optimization, which is based on decentralized control, and inter-area optimization, which is based on centralized control are proposed to utilize the energy in the grid.

Energy Efficient Network Design Tool for Green IP/Ethernet Networks

Sho Shimizu, Gao ShanYAMANAKA NAOAKI

14th Conference on Optical Network Design and Modeling (ONDM2010) (SAN,DIEGO, CALIFORNIA, USA) ,

2010.02

Oral presentation (general)

New energy efficient network design algorithm and tool for low power consumption named MIDORI is proposed. Network is used minimum set of nodes and links which can transfer all communication traffic under QoS restriction. QoS restrictions are included hop limit, bandwidth limit reliability and stability. Set-covered problem is applied to this algorithm and all links are modeled as “1” for on and “0” for off. To solve the optimum network configuration, parallel data flow type reconfigurable processer, DAPDNA is applied to solve this problem efficiently. The processor automatically produces the node/link set and confirms traffic QoS requirements. This algorithm can achieve optimum network resources. According to our evaluation results, it can achieve more than 25 % higher efficient than conventional holistic algorithm. And also the evaluation results show the 2 decade faster calculation than conventional sequential method using Pentium II processor. Using the design tool and newly developed remote power controlled L2 switch, experimental network is now under development. Using the proposed algorithm and tool, energy efficient IP/ Ethernet network can be realized. We can estimate that it can reduce about 38K ton CO2 par year.

A Study of TCP over SCTP Parallel Networking and Parallel Route Selection Approach for Mass Data Transfer Applications

Shota YAMADA, Midori TERASAWA, Sho SHIMIZU, Daisuke ISHII, Satoru OKAMOTO,YAMANAKA NAOAKI

14th Conference on Optical Network Design and Modeling (ONDM2010) (SAN,DIEGO, CALIFORNIA, USA) ,

2010.02

Oral presentation (general)

Parallel transmission is one of the popular technique for realizing huge bandwidth. However, in parallel transmission, many frame order inversions will be occured when the delay difference among the routes is large, and TCP throughput will be decrease drastically. In this paper, a TCP over SCTP(Stream Contral Transmission Protocol) parallel trannsmission system is proposed. To achieve the end-to-end communication, TCP is used. To defeat the frame inversion, SCTP is used. Each TCP packet is encapsulated into SCTP packet at Gateways which are located between parallel transmission section implemented on the software switch to evaluate parallel transmission by using the grid application. A parallel route selection algorithm is also proposed and evaluated delay difference characteristics.

Newly Proposed Signaling Based Service Provision Concept for Ubiquitous Grid Networking Environment

Hirofumi Yamashita, Yusuke Okazaki, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

IEEE Seoul Section International Student Paper Contest 2009 (Hanyang University, Seoul, Korea) ,

2009.12

Oral presentation (general)

With the advance of ubiquitous society including IPv6, it is expected that everything will be connected to the network. Then, a ubiquitous grid networking environment(uGrid) has been proposed. In uGrid, everything is defined as ”Service-part” and several Service-Parts are combined to provide new service for users. We propose ”Service-Signaling” which is a new service provision based on signaling protocol. In proposed network, software program functions having IP address are defined as Service-Parts in addition to hardware devices. Service-Signaling is marked by both interconnecting some Service-Parts and providing the desired service for users. To evaluate the effectiveness of the proposal, we experiment in interconnecting Service-Parts. In the experiment, RSVP-TE extension is employed.

Reducing Network Power Consumption Using Dynamic Link Metric Method and Power Off Links

Shan Gao, Jia Zhou, Aya Tsurusaki,YAMANAKA NAOAKI

IEEE Seoul Section 2009 (Hanyang University, Seoul, Korea) ,

2009.12

Oral presentation (general)

As the high-speed network technologies developing, the traffic in the Internet increase rapidly. The network power consumption has come up to 10% of the worldwide energy consumption. In order to reduce this kind of consumption, we propose a novel method, which dynamically modifies the weights of links and makes traffic gather to certain links and then set some links of which the load no traffic Powe-Off. We also did much work in the network simulations, and the result shows that the method has a good effect in reducing the network power consumption.

uGRID--Video Service Network using photonic network--

YAMANAKA NAOAKI

Keio/NTT-Technical meeting (東京都品川区グランドプリンスホテル新高輪) ,

2009.11

Oral presentation (general)

High-speed Photonic Network Architecture---Photonic Network and it’s applications---

YAMANAKA NAOAKI

(招待講演） IEICE東北支部専門講習会（弘前大学） (青森県弘前市文京町弘前大学) ,

2009.11

Oral presentation (general)

High-speed Network, today and future

YAMANAKA NAOAKI

IEICE Technical Report (東京都文京区日本女子大学目白キャンパス) ,

2009.11

Oral presentation (general)

Establishment of Point-to-Multi-Point path in GMPLS controlled Wide Area Ethernet

Ko Kikuta, Daisuke Ishii, Satoru Okamoto,YAMANAKA NAOAKI

12th Annual International Conference on Next Generation Internet and Related Technologies( MPLS2009) (WashingtonDC, USA) ,

2009.10

Oral presentation (general)

Implementation of RSVP-TE extension for establishment E-tree in GMPLS framework

Ko KIKUTA, Daisuke ISHII, Satoru OKAMOTO,YAMANAKA NAOAKI

IEICE Technical Report (埼玉県ふじみ野市　株式会社KDDI研究所) ,

2009.10

Oral presentation (general)

We established P2MP (Point-to-MultiPoint) path on a Wide-Area-Ethernet for the next generation network we assumed. With this P2MP path provision, the connection service among multiple point will be achieved. The IETF published the standard for the GMPLS signaling of P2MP path establishment, “RFC4875”, but this standard does not specify the detail of node behavior. We implemented a prototype RSVP-TE based on RFC4875 and achieved P2MP path provision with GMPLS signaling. In this document, the detail of this implementation is reported.

TCP Friendly Active Optical Access Network Having Automatic Ranging

Kunitaka Ashizawa, Kazumasa Tokuhashi, Daisuke Ishii, Yutaka Arakawa,YAMANAKA NAOAKI

The 35th European Conference on Optical Communication (ECOC 2009) (Vienna, Austria) ,

2009.09

Oral presentation (general)

Experiment of Transport and Control Protocols in Control-plane Integrated Next Generation Wide Area Layer2 Network

Daisuke Ishii, Kou Kikuta, Satoru Okamoto, YAMANAKA NAOAKI

The 35th European Conference on Optical Communication (ECOC 2009) (Vienna, Austria) ,

2009.09

Oral presentation (general)

Newly Structured Router Network Architecture using Cloud Control Plane and Forwarding Plane

Sho Shimizu, Shan Gao, Daisuke Ishii, YAMANAKA NAOAKI

International Workshop on the Network of the Future 2009(Future-Net2009) (Dresden, Germany) ,

2009.06

Oral presentation (general)

This paper proposes a novel network architecture called cloud control plane (Cloud C-plane) to reduce the power consumption of networks. In Cloud C-plane, the forwarding functions and control functions are decoupled, and the control functions are placed in the cloud. In addition, physical network topology is modified to improve the energy efficiency when the load of traffic changes. The routing engine on a dynamically reconfigurable processor (DRP) is a key component of Cloud Cplane. We implement the prototype of the routing engine on an actual DRP, and the experimental results show the execution time of the prototype is 19 times faster in the shortest path calculation.

Secure and Scalable Optical Access Network using PLZT High-speed Optical Switches

Kazumasa Tokuhashi, Kunitaka Ashizawa, Daisuke Ishii, Yutaka Arakawa, Koji Wakayama,YAMANAKA NAOAKI

High Performance Switching and Routing(HPSR2009) (Paris, France) ,

2009.06

Oral presentation (general)

We are proposing a new optical access network architecture using PLZT 10 nsec high-speed optical switches, called Active Optical Network (ActiON). Our architecture can increase four times the number of subscribers as well as double the distance between OLT and ONUs than GE-PON. Moreover, a user can establish secure communication in ActiON. Because ActiON uses not broadcasting system but slot based switching system. ActiON has to overcome a Discovery process issue because an optical switch can not broadcast. In this paper, we propose a new Discovery process technique. Through simulation results and experimental results, we show that our proposed architecture is able to complete Discovery process with accuracy.

Experiments of GMPLS based layer2 path control functions for next generation wide area layer2

Daisuke Ishii, Kou Kikuta, Masahiro Nishida, Yutaka Arakawa, Satoru Okamoto,YAMANAKA NAOAKI

5th International Conference on IP+Optical Network (iPOP2009) (NICT Headquarters, Koganei, Tokyo, Japan) ,

2009.06

Oral presentation (general)

A Novel Traffic Engineering Method using On-Chip Diorama Network on Dynamically Reconfigurable Processor DAPDNA-2

Shan Gao, Taku Kihara, Sho Shimizu, Yutaka Arakawa,YAMANAKA NAOAKI, Akifumi Watanabe

High Performance Switching and Routing( HPSR2009) (Paris, France) ,

2009.06

Oral presentation (general)

This paper proposes a novel traffic engineering method using on-chip diorama network that consists of virtual nodes and virtual links. The diorama network is implemented on reconfigurable processor DAPDNA-2. In these years, traffic engineering has widely researched to guarantee QoS (Quality of Service). The proposal is an experimental solution with the onchip diorama network, where virtual links and virtual nodes are constructed by some PEs (processing elements). We obtain the realistic traffic fluctuation through the behavior of virtual packets exchanged on the on-chip diorama network. In this paper, as first trial to achieve our final goal, we implemented diorama network and confirmed basic path calculation, where both functions are an essential function of our algorithm. The diorama network traffic engineering can realize more sophisticated network design like adaptive traffic balancing or multi-metric design.

Recover-Forwarding Method In Link Failure With Pre-established Recovery Table For Wide Area Ethernet

Midori Terasawa, Masahiro Nishida, Sho Shimizu, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

IEEE International Conference on Communications (ICC 2009) (Dresden Germany) ,

2009.06

Oral presentation (general)

This paper proposes a fast fault recovery method for the wide area Ethernet. To achieve fast recovery, a pre-established forwarding table is introduced. The pre-established table is looked up when a fault occurs, and frames are forwarded without frame loss. Ethernet lacks of fault recovery features required in Wide Area Network (WAN) since it is originated as Local Area Network (LAN) technology. Protection or restoration is a typical method for fault recovery, but a lot of frame losses are inevitable. Our proposal can decrease frame losses since frames are forwarded without waiting for path switching to be completed to use the pre-preparation table. In addition, the proposed method can be operated with the legacy forwarding method seamlessly. The simulation results show that frame loss decreases to 40 % or less with our proposed method.

Reducing Network Power Consumption Using Dynamic Link Metric Method and Power Off Links

YAMANAKA NAOAKI

インターネットアーキテクチャ研究会 (機械振興会館（東京）) ,

2009.06

Oral presentation (general), IEICE

As the high-speed network technologies developing,the traffic in the Internet increase rapidly. The network power consumption has come up to 10% of the worldwide energy consumption. In order to reduce this kind of consumption, we propose a novel method, which dynamically modifies the weights of links and makes traffic gather to certain links and then set some links of which the load no traffic Powe-Off. We also did much work in the network simulations, and the result shows that the method has a good effect in reducing the network power consumption.

10054136354120090721135140PDF1.pdf

Simple Lightning Detection System Experiments Using Networked Sensors

Masayasu YAMAGUCHI, YAMANAKA NAOAKI

IEICE Technical Report (神奈川県横浜市　慶應大学理工学部　矢上キャンパス) ,

2009.05

Oral presentation (general)

This paper reports a prototype simple lightning detection system using networked multisite sensors and its experimental results. To achieve a low-cost system compared with the conventional systems, a simple structure based on a general-purpose personal computer is employed in a lightning detector. We experimentally demonstrate the feasibility of observing the lightning pulses by using a prototype system consisting of three lightning detectors deployed at three observation sites. We also discuss issues for improving the performance of the system.

An Evaluation on Optical Switch Element in Active Optical Access Syst

Koji Wakayama, Daisuke Mashimo, Jun Sugawa, Hiroki Ikeda, Michitaka Okuno, Kenichi Sakamoto, Yutaka Arakawa,YAMANAKA NAOAKI

電子情報通信学会2009総合大会 (愛媛大学) ,

2009.03

Oral presentation (general), 電子情報通信学会

10054136354020090721131913PDF1.pdf

広域レイヤ2 ネットワークにおける遅延揺らぎの小さいキューイング方式

Kazuko YONEZAWA, Midori TERASAWA, Masahiro NISHIDA, Sho SHIMIZU, Yutaka ARAKAWA, Satoru OKAMOTO, and YAMANAKA NAOAKI

IEICE Technical Report (岐阜長良川温泉国際会議場) ,

2009.03

Oral presentation (general)

In recent years, Wide Area Ethernet has become widespread. Wide Area Ethernet is a technique which was expanded from the Ethernet to connect two separated bases using Ethernet. Because Ethernet is a technique for Local Area Networks (LANs), we need a queuing method which controls bandwidth, delay, and delay jitter to use real-time applications in Wide Area Ethernet. The conventional method named Deficit Round Robin (DRR) can control bandwidth and delay. In DRR, a Deficit Counter (DC) is set at each queue to control the frame size which the queue is able to send. However, it is difficult to control the delay jitter which greatly affects strictly real-time applications like haptic technology. Accordingly, we propose a method named Loan-Deficit Round Robin (L-DRR). L-DRR controls bandwidth, delay, and delay jitter using not only DC but also a Loan Counter (LC) to control the maximum delay. Finally, we show how our method affects delay jitter using a computation simulation.

Distributed Wavelength Allocation Scheme Considering Four Wave Mixing in All Optical Networks

Hirofumi Yamashita, Kazuki Irie, Yutaka Arakawa, Satoru Okamoto and YAMANAKA NAOAKI

IEICE TECHNICAL REPORT (久部良多目的集会施設(与那国島）) ,

2009.03

Oral presentation (general)

In this paper a novel distributed wavelength allocation scheme considering the four wave mixing (FWM) in all optical network is proposed. A main feature of the proposed scheme is that wavelengths are allocated by the wide interval as much as possible with considering wavelength usage condition of each link. Allocated wavelengths are calculated by a proposed expression wavelength intervals. Because of keeping the wide wavelength interval, the propose scheme can avoid using adjacent wavelengths and, can restrain generation of FWM. Evaluation results of the blocking probability are presented. It is indicated that the proposed scheme can improve the blocking probability values.

A Proposal for A uGrid Multi-Service Video Delivery Network Considers Security

Yuki Susa, Yusuke Okazaki, Ryota Usui, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report (久部良多目的集会施設(与那国島）) ,

2009.03

Oral presentation (general)

everything has an IP address and connect to the networks. In recent years, based on the above assumptions, a concept of the ubiquitous grid network environment (uGrid) has been generated. In uGrid, we de ne everything all over the world given IP address as a service parts. Users will freely search for service parts that they want to use from all over the world through the networks, and then, they combine each parts so that they can construct a desired distributed system, service, and working environment. So, in this study, we propose the Multi-Service Video Delivery Network for the uGrid service, which is different from the unidirectional video delivery system like a existing TV reception and enable to response to various QoS(Quality of Service) watching demands. Moreover, we attempt to construct a video f ltering transmission system using PLAYSTATION 3(PS3) as a part of the delivery service, in which we consider the needs of the individual privacy protection and the increase of the home-use game consoles or Cell Broadband Engine(Cell) in uGrid. As a result of that, we con rmed that the PS3 functioned as a service parts of the video delivery system in uGrid.

Service Parts Connection based on Dynamic Lightpath Establishment in uGrid

Yusuke Okazaki, Yuki Susa, Ryota Usui, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report (久部良多目的集会施設(与那国島）) ,

2009.03

Oral presentation (general)

With the advance of ubiquitous society, it is expected that everything will be connected to the network.Then, a ubiquitous grid networking environment (uGrid) has been proposed. In this environment, everything is defined as service parts and some service parts will be combined to provide new service for users. On the other hand, TV broadcast is one of the typical image distribution system that broadcasts contents to users. Thus, there are limitations by one-way system. In this paper, we propose next generation image distribution system in uGrid as a replacement of TV broadcast. In proposal, service parts are connected by lightpath which set up with GMPLS so that fixed bandwidth can be kept. As an emulation of proposal system, we implement the experimental environment which composed by Layer 2 switch and we demonstrate potential of service parts connection in proposal.

Parameter Design and Dynamic Slot Assignment considering TCP Throughput on Active Optical Access Network

Kunitaka Ashizawa, Kazumasa Tokuhashi, Kou Kikuta, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto and YAMANAKA NAOAKI

IEICE Technical Report (久部良多目的集会施設(与那国島）) ,

2009.03

Oral presentation (general)

High-speed Network, today and futureStudy on P2P Contetnt Delivery Systemu Considering Security

Hirofumi Yamashita, Kazuki Irie, Mikio Kaneko, Yutaka Arakawa, Satoru Okamoto,YAMANAKA NAOAKI

IEICE Technical Report (国内) ,

2009.03

Oral presentation (general)

大容量コンテンツ伝送において, コンテンツサーバの負荷軽減および効率的なコンテンツ配信を可能とするために, P2P を利用した配信方法が提案されている. しかし, コンテンツサーバは, すべてのクライアント情報を管理しており, コンテンツ検索時において, コンテンツ要求を行ったクライアントにコンテンツ取得者の情報をすべて提供してしまう点, クライアント間のダウンロードをサーバが管理できないという点において, セキュリティ上の問題がある. そこで, ネットワークをクラスタ化し, コンテンツサーバおよびスーパーノードにおいて, クライアント情報を分散的に管理すると共に, すべてのコンテンツ要求をサーバ経由で処理し, 配信許可を得たユーザのみ通達することによりコンテンツ要求先のクライアント情報の開示を限定し, セキュリティを考慮したコンテンツ配信ネットワークの検討を行った. その結果を報告する.

Establishment of VLAN Tag Swapped Path on GMPLS controllingWide Area Layer-2 Network

Kou Kikuta, Masahiro Nishida, Daisuke Ishii, Satoru Okamoto YAMANAKA NAOAKI

The Optical Fiber Communication Conference and The National Fiber Optic Engineers Conference (OFC/NFOEC) 2009 (SAN,DIEGO, CALIFORNIA, USA) ,

2009.03

Oral presentation (general)

Demonstration of the In-band Message Communication Channel and Mac-in-Mac technology for GMPLS Controlled New Generation Layer2 Transport Networks

Satoru Okamoto, Yutaka Arakawa, YAMANAKA NAOAKI

The Optical Fiber Communication Conference and The National Fiber Optic Engineers Conference (OFC/NFOEC) 2009 (SAN,DIEGO, CALIFORNIA, USA) ,

2009.03

Oral presentation (general)

Experiments of transport and control protocols for next generation wide area Layer2 networks

Satoru Okamoto, Kou Kikuta, Masahiro Nishida, Daisuke Ishii, Yutaka Arakawa, YAMANAKA NAOAKI

IEICE Technical Report (静岡県三島) ,

2009.02

Oral presentation (general)

As increasing Ethernet service users and enhancing service functions, a next generation wide area layer2 network beyond the state-of-the-art carrier grade Ethernet is expected. For realizing the next generation layer2 network (NGL2), we have proposed new layer2 protocol technologies based on Ethernet technologies and have developed elemental functional systems. In this article, a newly developed NGL2 prototype system is reported. The prototype system provides an in-band message communication channel (IMCC) function, Mac-in-Mac frame transport mechanism, and GMPLS based layer2 path control functions.

Fast Solution of Link Disjoint Path Algorithm on Parallel Reconfigurable Processor DAPDNA-2

Taku KIHARA, Sho SHIMIZU, Shan GAO, Yutaka ARAKAWA, Naoaki YAMANAKA, Akifumi WATANABE

IEICE TECHNICAL REPORT (慶應義塾大学日吉キャンパス) ,

2009.01

Oral presentation (general)

In next generation network, a high level reliabilty is strong required. In a protection, which is the one of network survivable technology, it is important to use a link-disjoint paths pair of lowest total cost in a view of network resource efficiency. However, the link-disjoint paths pair calculation is NP Complete and it takes great investment of time. In order to solve this problem, we propose a high-speed method of link-disjoint paths pair calculation based on parallel reconfigurable processor. Our proposed method calculates and finds all paths in network from all network link patterns, and then calculates all link-disjoint paths pairs and selects optimal solution. A parallel execution and data flow execution enable our propose to high-speed calculations. A two performance evaluation results show that our proposed method improves calculation time more than 20 times compared to conventional optimal link-disjoint paths pair calculation algorithm.

New Generation P2P Networks based on Dynamic Path Establishment with GMPLS

Mikio KANEKO, Shota YAMADA, Hirofumi YAMASHITA, Daisuke ISHII, Yutaka ARAKAWA, Satoru OKAMOTO, and YAMANAKA NAOAKI

IEICE Technical Report (神戸大学) ,

2008.12

Oral presentation (general), IEICE

Today, advanced network architectures like NGN are growing rapidly. These network architectures realize active bandwidth control from network application. Bandwidth control scheme makes broadband network architecture more beneficial. In this paper, we design and implement New Generation P2P Networks based on Dynamic Path Establishment with GMPLS. We show the effectiveness of our designed advanced P2P network architecture by computation simulation. We also show that our P2P network architecture is suitable for rich contents delivery by implementation.

Network Reconfigure Algorithm With Least Resource For Energy Efficient Optical Network

Aya Tsurusaki, Yutaka Arakawa, Daisuke Ishi,YAMANAKA NAOAKI, Hiroyuki Ishikawa, Yasuhiro Shiba

IEICE Technical Report (神戸大学) ,

2008.12

Oral presentation (general)

The Internet has been popular recently, and network traffic of the Inter net is growing. The power consumpution is an issue. The large part of power consumption in network equipments is consumed in idle time, so Ehternet interface rate changes on needs. However, optical interface rate can’t change because of technical reason. The approach to sleep port itself is needed. We proposed a network reconfiguration algorithm for reducing power consumption. Network is used minimum set of link which can transfer all communication traffic load. Our proposal is not heuristic, but can obtains optimized solution.

A Novel Network Optimization Method using On-Chip Virtual Network on Dynamically Reconfigurable Processor DAPDNA-2

Shan GAO, Taku KIHARA, Sho SHIMIZU, Yutaka ARAKAWA, YAMANAKA NAOAKI, Kosuke SHIBA

IEICE Technical Report (Kitakyushu Science and Research Park) ,

2008.11

Oral presentation (general)

Delay-Aware Scale-Free Display System under Ubiquitous Grid Networking (uGrid) Environment

Yusuke OKAZAKI, Yuki SUSA, Ryota Usui, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEEE Seoul Section International Student Paper Contest 2008 (Seoul, Korea) ,

2008.11

Oral presentation (general)

Traffic Engineering based on Experimentation in On-chip Virtual Network on Dyamically Reconfigurable Processor

Shan GAO, Taku KIHARA, Sho SHIMIZU, Yutaka ARAKAWA, YAMANAKA NAOAKI, Kosuke SHIBA

IEEE Seoul Section International Student Paper Contest 2008 (Seoul, Korea) ,

2008.11

Oral presentation (invited, special)

Fast Link-Disjoint Path Algorithm on Parallel Reconfigurable Processor DAPDNA-2

Taku KIHARA, Sho SHIMIZU, Yutaka ARAKAWA, YAMANAKA NAOAKI, Kosuke SHIBA

International Conference on The 14th Asia-Paciffic Conference on Communications (APCC2008) (Akihabara, Tokyo, Japan) ,

2008.10

Oral presentation (general)

Efficient Contents Delivery Method with Scheduled Unicast and Multicast

Kazuki IRIE, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

International Conference on The 14th Asia-Paciffic Conference on Communications (APCC2008) (Akihabara, Tokyo, Japan) ,

2008.10

Oral presentation (general)

Fast Replica Allocation Method by Parallel Calculation on DAPDNA-2 (Best Paper Award)

Hiroyuki Ishikawa, Sho Shimizu, Yutaka Arakawa, YAMANAKA NAOAKI, Kosuke Shiba

The 14th Asia-Pacific Conference on Communications (APCC 2008) (Akihabara, Tokyo, Japan) ,

2008.10

Oral presentation (general)

A Novel Distributed Data Access Scheme Considering with Link Resources and Metric in Lambda Grid Networks

Ryota Usui, Hiroyuki Miyagi, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

International Conference on The 14th Asia-Paciffic Conference on Communications (APCC2008) (Akihabara, Tokyo, Japan) ,

2008.10

Oral presentation (general)

Interoperability activities for photonic networks in Japan

YAMANAKA NAOAKI, Masatoshi Suzuki, Takeshi Akaike, Satoru Okamoto

The 7th International Conference on Optical Internet (COIN2008) (Akihabara Convention Hall, Tokyo, Japan (COIN2008 is co-located with APCC2008.)) ,

2008.10

Oral presentation (general)

Implementation of VLAN Path Signaling with Domain Tag Swapping for GMPLS controlled Wide Area Layer-2 Network

Kou Kikuta, Masahiro Nishida, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

The 7th International Conference on Optical Internet (COIN2008) (Akihabara Convention Hall, Tokyo, Japan (COIN2008 is co-located with APCC2008.)) ,

2008.10

Oral presentation (general)

Adaptive Resource Reservation Protocol for High-speed Resource Information Advertisement

Masahiro Nishida, Hiroyuki Ishikawa, Sho Shimizu, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

The 14th Asia-Paciffic Conference on Communications (APCC2008) (Akihabara, Tokyo, Japan) ,

2008.10

Oral presentation (general)

Cooperating Superpeers based Service-Parts Discovery for Ubiquitous Grid Networking (uGrid)

Motomi Akagi, Ryota Usui, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

The 7th International Conference on Optical Internet (COIN2008) (Akihabara Convention Hall, Tokyo, Japan (COIN2008 is co-located with APCC2008.)) ,

2008.10

Oral presentation (general)

Hierarchical and Cooperative Download Method with File Partitioning for Mitigating Contents Server Load in Contents Delivery Network

Kazuki IRIE, Hirofumi YAMASHITA, Yutaka ARAKAWA, Satoru OKAMOTO,YAMANAKA NAOAKI

IEICE Technical Report (東京都目黒区東京大学駒場リサーチキャンパス) ,

2008.10

Oral presentation (general)

We propose a two step delivery method to reduce contents server load for large size content delivery. In our proposed method, a receiver receives a part of desired content from already content downloaded nodes (collaboration nodes). Furthermore, they transfer the received content to other receivers each other coordinately to gather the rest of the content.
By applying our proposed method, contents server load can be reduced and download speed can be improved with using the upload bandwidth of some collaboration node and receivers effectively. Also we evaluate the performance by computer simulation. The results shows that the download time is reduced.

広域分散コンピューティングを用いた遅延を考慮したスケールフリーディスプレイ構築法

Yusuke OKAZAKI, Yuki SUSA, Ryota Usui, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

電子情報通信学会技術研究報告 (東京大学（駒場）) ,

2008.10

Oral presentation (general)

Hierarchical and Cooperative Download Method with File Partitioning for Mitigating Contents Server Load in Contents Delivery Network

Kazuki IRIE, Hirofumi YAMASHITA, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (東京大学駒場リサーチキャンパス) ,

2008.10

Oral presentation (general)

European Conference on Optical Communication 2008

Satoru Okamoto, Sho Shimizu, Yutaka Arakawa, YAMANAKA NAOAKI

European Conference on Optical Communication 2008 (Brussels, Belgium) ,

2008.09

Oral presentation (general)

Hardware Based Scalable Path Computation Engine for Multilayer Traffic Engineering in GMPLS networks

Sho Shimizu, Taku Kihara, Yutaka Arakawa, YAMANAKA NAOAKI, Kosuke Shiba

34th European Conference on Optical Communication (Brussels, Belgium) ,

2008.09

Oral presentation (general)

In-band GMPLS Message Communication Channel for GELS Networks

Satoru Okamoto, Sho Shimizu, Yutaka Arakawa, YAMANAKA NAOAKI

Proceedings of the 2008 IEICE Society Conference (明治大学　生田キャンパス) ,

2008.09

Oral presentation (general)

Network reconfigure Algorithm for Low power Consumption

Yutaka ARAKAWA, Daisuke ISHII, Aya TSURUSAKI, YAMANAKA NAOAKI, Hiroyuki ISHIKAWA, Yasuhiro SHIBA

IEICE Technical Report (小樽朝里クラッセホテル) ,

2008.08

Oral presentation (general)

A Study on High Speed Method of Link-Disjoint Path Calculation

Taku KIHARA, Sho SHIMIZU, Gao SHAN, Yutaka ARAKAWA, YAMANAKA NAOAKI

IEICE Technical Report (小樽朝里クラッセホテル) ,

2008.08

Oral presentation (general)

Experiment of the in-band GMPLS message Channel for GELS network

Satoru Okamoto, Sho Shimizu, Yutaka Arakawa, YAMANAKA NAOAKI

IEICE Technical Report (小樽朝里クラッセホテル) ,

2008.08

Oral presentation (general)

A study on optical access network with active optical switches

Kazumasa TOKUHASHI, Kou KIKUTA, Daisuke ISHII, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (小樽朝里クラッセホテル) ,

2008.08

Oral presentation (general)

Fast Fault Recovery Method With Pre-established Recovery Table For Wide Area Ethernet

Midori Terasawa, Masahiro Nishida, Sho Shimizu, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

International Conference on Photonics in Switching 2008 (PS2008) (Hokkaido University, Sapporo, Japan) ,

2008.08

Oral presentation (general)

P2P HD Contents Transport Network Based on PLZT High-Speed Optical Slot Switching (OSS)

Teruo Kasahara, Kazumasa Tokuhashi, Kou Kikuta, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

International Conference on Photonics in Switching 2008 (PS2008) (Hokkaido University, Sapporo, Japan) ,

2008.08

Oral presentation (general)

10 GE optical layer protection evaluation using PLZT optical switches

Satoru Okamoto, Yutaka Arakawa, YAMANAKA NAOAKI

International Conference on Photonics in Switching 2008 (PS2008) (Hokkaido University, Sapporo, Japan) ,

2008.08

Oral presentation (general)

Approach of Flexible-Switch for Next-Generation Layer-2 Network

Masahiro Nishida, Sho Shimizu, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report (千歳科学技術大学) ,

2008.06

Oral presentation (general)

GMPLS VLAN Path Establishment using Inter-domain VLAN Tag Swapping

Kou Kikuta, Masahiro Nishida, Daisuke Ishii, Satoru Okamoto, YAMANAKA NAOAKI

iPOP2008 (NTT武蔵野研究開発センタ) ,

2008.06

Oral presentation (general)

A prototype of a dynamically reconfigurable processor based off-loading engine for accelerating the shortest path calculation with GNU Zebra

Sho Shimizu, Taku Kihara, Yutaka Arakawa, YAMANAKA NAOAKI, Kosuke Shiba

2008 International Conference on High Performance Switching and Routing (HPSR 2008) (Shanghai, China) ,

2008.05

Oral presentation (general)

Performance Evaluation of Grid Computing Using Parallel Data Link

Hiroyuki MIYAGI, Yusuke OKAZAKI, Ryota USUI, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (大濱信泉記念館（沖縄県石垣市）) ,

2008.03

Oral presentation (general)

The Experiment of Inter Service Parts Connection Techniques for Ubiquitous Grid Networking Environment (uGrid)

Ryota USUI, Motomi AKAGI, Hiroyuki MIYAGI, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (大濱信泉記念館（沖縄県石垣市）) ,

2008.03

Oral presentation (general)

Study and Implementation on P2P based Contents Delivery Network System

Tomohiro TSUJI, Mikio KANEKO, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (大濱信泉記念館（沖縄県石垣市）) ,

2008.03

Oral presentation (general)

Agenda of the Ubiquitous Grid Networking Environment (uGrid)

Ryota USUI, Motomi AKAGI, Hiroyuki MIYAGI, Yutaka Arakawa, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (大濱信泉記念館（沖縄、石垣島）) ,

2008.03

Oral presentation (general)

A Research on Grid Computing Considering Network Charasteristics

Hiroyuki MIYAGI, Yusuke OKAZAKI, Ryota USUI, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (大濱信泉記念館（沖縄、石垣島）) ,

2008.03

Oral presentation (general)

Study and Implementation on P2P based Contents Delivery Network System

Tomohiro TSUJI, Mikio KANEKO, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (大濱信泉記念館（沖縄、石垣島）) ,

2008.03

Oral presentation (general)

GMPLS-based High-speed Optical Slot Switching System Using PLZT Ultra-high Speed Optical Switch for HDTV Contents Delivery Network

Teruo Kasahara, Tomohiro Tsuji, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, Hiroyuki Tsuda, YAMANAKA NAOAKI, Keiichi Nashimoto

The Optical Fiber Communication Conference & Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC 2008) (SAN DIEGO CONVENTION CENTER SAN DIEGO, CALIFORNIA, USA) ,

2008.02

Oral presentation (general)

An Experiment of Controlling GigabitWide Area Ethernet by GMPLS supporting Layer-2 Switching Capability

Daisuke Ishii, Kou Kikuta, Satoru Okamoto, YAMANAKA NAOAKI

The Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference (OFC/NFOEC2008) (国内) ,

2008.02

Oral presentation (general)

A Study on Scheduling and Multicast for Contents Delivery

Kazuki IRIE, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (日本) ,

2008.02

Oral presentation (general)

Fast calculation method of Set Cover Problem on parallel reconfigurable processor DAPDNA-2

Hiroyuki ISHIKAWA, Sho SHIMIZU, Yutaka ARAKAWA, YAMANAKA NAOAKI, Kosuke SHIBA

IEICE Technical Report (慶應義塾大学日吉キャンパス) ,

2008.01

Oral presentation (general)

光ネットワーク及び次世代インターネットアーキテクチャ関連セッションの動向

YAMANAKA NAOAKI, Hiroyuki Miyagi, Hiroyuki Ishikawa

Communications Society Magazine (国内) ,

2007.12

Oral presentation (general)

High-speed optical slot-switch system for HDTV contents delivery network

YAMANAKA NAOAKI, H.Tsuda, D.Ishii

XJTU-KEIO Workshop on Devixe and information/Communication technology (Keio University, Yagami Campus) ,

2007.11

Oral presentation (general), Keio University

High-speed Resource Information Advertising Method in GMPLS

Masahiro Nishida, Hiroyuki Ishikawa, Sho Shimizu, Yutaka Arakawa, Okamoto Satoru, YAMANAKA NAOAKI

電子情報通信学会技術研究報告 (国内) ,

2007.08

Oral presentation (general)

Prefetching Protocol Proxy with Optimal Mirror Selection and Burst Transmission

Tomohiro Tsuji, Junichiro Honma, Sho Shimizu, Yutaka Arakawa, YAMANAKA NAOAKI

12th OptoElectronics and Communications Conference (OECC 2007) / 16th International Conference on Integrated Optics and Optical Fiber Communication (IOOC 07), OECC/IOOC 2007, (Pacifico Yokohama, Yokohama Kanagawa, JAPAN) ,

2007.07

Oral presentation (general)

SubFrame-Based Slot Reservation Scheme for Minimizing Transmission Delay in Optical Slot Switching Network

Fumiko Uehara, Teruo Kasahara, Masahiro Hayashitani, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

2007.07

Oral presentation (general)

The Distributed Data Access Schemes in Lambda Grid Networks

Ryota Usui, Hiroyuki Miyagi, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

OECC2007 student workshop (Yokohama, Kanagawa, Japan) ,

2007.07

Oral presentation (general)

A Deadline-Aware Scheduling Scheme for Wavelength Assignment in Lambda Grid Networks

Hiroyuki Miyagi, Masahiro Hayashitani, Daisuke Ishii, Yutaka Arakawa, YAMANAKA NAOAKI

2007 IEEE International Conference on Communications (ICC2007) (Glasgow) ,

2007.06

Oral presentation (general)

New Parallel Shortest Path Searching Algorithm based on Dynamically Reconfigurable Processor DAPDNA-2

Hiroyuki ISHIKAWA, Sho SHIMIZU, Yutaka ARAKAWA, YAMANAKA NAOAKI, Kosuke SHIBA

2007 IEEE International Conference on Communications (ICC2007) (Glasgow) ,

2007.06

Oral presentation (general)

The Distributed Data Access Schemes In λ Grid Networks

Ryota USUI, Hiroyuki MIYAGI, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (千歳科学技術大（北海道）) ,

2007.06

Oral presentation (general)

Design and Implementation of GMPLS-based Optical Slot Switching Network with PLZT High-speed Optical Switch

Teruo Kasahara, Masahiro Hayashitani, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI

HIGH PERFORMANCE SWITCHING AND ROUTING CONFERENCE(HPSR) 2007 (Polytechnic University, Brooklyn, NY, USA) ,

2007.05

Oral presentation (general)

Design and Implementation of GMPLS-Based Optical Slot Switching Access-Distribution Network Using PLZT Ultra-High Speed Optical Switch

Masahiro Hayashitani, Teruo Kasahara, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI, Naganori Takezawa, Keiichi Nashimoto

The Optical Fiber Communication Conference & Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC 2007) (Anaheim,California,U.S.) ,

2007.03

Oral presentation (general)

Lightpath setup route selection scheme using multi-path message in an optical grid network using GMPLS

Daisuke Ishii, Bijan Jabbari, YAMANAKA NAOAKI

2007 academic conference of IEICE, March 2007 (名城大学、名古屋) ,

2007.03

Oral presentation (general)

High speed optical switches for future networking technologies

Satotu Okamoto, Yutaka Arakawa, YAMANAKA NAOAKI

IEICE General Conference (名城大学、名古屋) ,

2007.03

Oral presentation (general)

The Proposal of Job Scheduling Algorithm Based on Priority and Job End Time in Optical Grid Networks

Shimpei KODA, Hiroyuki MIYAGI, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (国内) ,

2007.03

Oral presentation (general)

A Novel Contents Delivery Network Sytem for Efficiently Resolving Long-tailed User Requests

Junichiro HONMA, Tomohiro TSUJI, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (国内) ,

2007.03

Oral presentation (general)

Overlay reconfiguration scheme for P2P based HD-CDN （High-Definition Contents Delivery Network)

Mikio KANEKO, Tomohiro TSUJI, Junichirou HONMA, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report (国内) ,

2007.03

Oral presentation (general)

A Deadline-Aware Wavelength Scheduling scheme for WDM-based λ Grid Networks

Hiroyuki miyagi, Masahiro Hayashitani, Daisuke Ishii, Yutaka Arakawa, YAMANAKA NAOAKI

CPT2007 -Photonic Technologies towards the Next Decade- (BELLESALLE KANDA, Tokyo, Japan) ,

2007.01

Poster presentation

Parallel Shortest Path Searching Algorithm on Dynamically Reconfigurable Processor

Hiroyuki ISHIKAWA, Sho SHIMIZU, Yutaka ARAKAWA, YAMANAKA NAOAKI, Kosuke SHIBA

CPT2007 -Photonic Technologies towards the Next Decade- (BELLESALLE KANDA, Tokyo, Japan) ,

2007.01

Poster presentation

A New Accelerated Download Mechanism for Rich Contents

Tomohiro TSUJI, Junichiro HONMA, Sho SHIMIZU, Yutaka ARAKAWA, and YAMANAKA NAOAKI

CPT2007 -Photonic Technologies towards the Next Decade- (BELLESALLE KANDA, Tokyo, Japan) ,

2007.01

Poster presentation

GMPLS-based Optical Slot Switching Access-distribution Network with 10ns High-speed PLZT Optical Switch

Masahiro Hayashitani, Teruo Kasahara, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI, Naganori Takezawa, Keiichi Nashimoto

CPT2007 -Photonic Technologies towards the Next Decade- (BELLESALLE KANDA, Tokyo, Japan) ,

2007.01

Poster presentation

Optical Slot Switching Architecture based on dynamic path setup using ultra-high speed PLZT optical switch

Teruo KASAHARA, Masahiro HAYASHITANI, Daisuke ISHII and YAMANAKA NAOAKI

CPT2007 -Photonic Technologies towards the Next Decade- (BELLESALLE KANDA, Tokyo, Japan) ,

2007.01

Poster presentation

Photonic Network Interoperability and Standardization Activities in Japan

YAMANAKA NAOAKI

OIW2006 (Onyang, Korea) ,

2006.10

Oral presentation (invited, special)

Interoperability activities for photonic networks in Japan

YAMANAKA NAOAKI, S. Okamoto, T. Otani, M. Suzuki, N. Arai, H. Otsuki

Asia-Pacific Optical Communications (APOC) 2006 (Kindaejung Convention Center, Gwangju) ,

2006.09

Oral presentation (invited, special), SPIE

Design and Implement of GMPLS-based Optical Slot Switching Network Using PLZT Ultra-high Speed Optical Switch

Masahiro Hayashitani, Teruo Kasahara, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, Naoaki Yamanaka

IEICE Technical Report, PN2006-15 (北海道稚内市) ,

2006.08

Oral presentation (general)

A New Burst Assembly Technique Supporting Fair QoS about the Number of Hops in OCBS Multi-hop Networks

Masahiro Hayashitani, Kohei Okazaki, Naoaki Yamanaka

COIN-NGNCON 2006 (韓国　済州島) ,

2006.07

Oral presentation (general), IEEE LEOS

IP+Optical Technology for High-performance Backbone Network in Japan

Naoaki Yamanaka

2006 IEEE SARNOF SYMPOSIUM, (Princeton, New Jersey) ,

2006.03

Poster presentation

Prefetching Protocol Proxy with Optimal Mirror Selection and Burst Transmission

Tomohiro Tsuji,Junichiro Honma,Sho Shimizu,Yutaka Arakawa,Naoaki Yamanaka

IEICE Technical Report, PN2005-119, March 2006 (石垣島) ,

2006.03

Oral presentation (general)

Optical Slot Switching Architecture based on dynamic path setup using ultra-high speed PLZT optical switch

Teruo KASAHARA,Junichiro HONMA, Masahiro HAYASHITANI, Daisuke ISHII, Yutaka ARAKAWA, Naoaki YAMANAKA

IEICE Technical Report, PN2005-103, March 2006 (石垣島) ,

2006.03

Oral presentation (general)

A Deadline-Scheduling Scheme for Wavelength Assignment in λ Grid Networks

Hiroyuki MIYAGI, Masahiro HAYASHITANI, Daisuke ISHII, Yutaka ARAKAWA, and Naoaki YAMANAKA

IEICE Technical Report, PN2005-109, March 2006 (石垣島) ,

2006.03

Oral presentation (general)

Shortest Path Algorithm on Parallel Reconfigurable Processor DAPDNA-2

Hiroyuki ISHIKAWA, Sho SHIMIZU, Yutaka ARAKAWA, Naoaki YAMANAKA, and Kosuke SHIBA

IEICE TECHNICAL REPORT, NS2005-162, March 2006 (沖縄) ,

2006.03

Oral presentation (general)

Construction of Overlay Network Considering User Preference in Peer-to-Peer Systems

Masahiro Tateno, Sho SHIMIZU, Yutaka Arakawa, Naoaki Yamanaki

IEICE Technical Report, IN2005-180, March 2006 (沖縄) ,

2006.03

Oral presentation (general)

Self-Learning Route Selection Scheme Using Search Packets in an OBS Network

Daisuke Ishii,Naoaki Yamanaka

2006 Ninth International Symposium on Contemporary Photonics Technology, (東京) ,

2006.01

Poster presentation

A Wavelength Assignment Considering the Number of Hops in Limited-range Wavelength-Routed Networks

Sho Shimizu, Yutaka Arakawa,Naoaki Yamanaka

2006 Ninth International Symposium on Contemporary Photonics Technology, (東京) ,

2006.01

Poster presentation

On-the-fly Path Setup Mechanism for QoS Differentiation in Optical Burst Switching

Yutaka Arakawa,Naoaki Yamanaka

2006 Ninth International Symposium on Contemporary Photonics Technology, (東京) ,

2006.01

Poster presentation

A New QoS Differentiation Scheme in Optical Burst Switching with On-the-fly Path Setup Mechanism

YUTAKA ARAKAWA, YAMANAKA NAOAKI

IEICE Technical Report (愛媛大学) ,

2005.12

Oral presentation (general)

A Study on Shortest Path Routing Algorithm on Data-flow Parallel Reconfigurable Processor DAPDNA2

Sho SHIMIZU, Yutaka Arakawa, Naoaki YAMANAKA, Kosuke SHIBA,

IEICE Technical Report (日本国北九州市) ,

2005.12

Oral presentation (general), IEICE

Overview of GMPLS Interworking test in Japan and NICT keihanna GMPLS E-NNI trials

YAMANAKA NAOAKI

MPLS2005 (Washington D.C.) ,

2005.10

Oral presentation (invited, special), ISOCORE

Burst and Circuit integrated network based on Optical Burst Switching

Yutaka Arakawa, Yamanaka Naoaki

電子情報通信学会技術研究報告 (慶應義塾大学　理工学部　矢上キャンパス) ,

2005.10

Oral presentation (general), Institute of Electro Information Communication Engineering

An Effective Wavelength/Route Resevation Scheme Using Signaling Protocol in nonuniform traffic WDM network

Junichiro HONMA, Daisuke Ishii，Naoaki Yamanaka

電子情報通信学会技術研究報告 (慶應義塾大学　理工学部　矢上キャンパス) ,

2005.10

Oral presentation (general), Institute of Electro Information Communication Engineering

OBSネットワークにおいて探索パケットを利用した自己学習型経路選択方式

Daisuke Ishii, Naoaki Yamanaka

電子情報通信学会技術研究報告 (慶應義塾大学理工学部矢上キャンパス) ,

2005.10

Oral presentation (general), Institute of Electro Information Communication Engineering

Architecture of Optical Burst Switched Ring Network with Distributed Fairness Control

ARAKAWA YUTAKA,YAMANAKA NAOAKI

OECC2005 (Seoul, KOREA) ,

2005.07

Oral presentation (general)

Photonic-GMPLS Leading Edge Code Research Consortium: Photonic Internet Lab. (PIL)

YAMANAKA NAOAKI

OECC2005 (Seoul, KOREA) ,

2005.07

Oral presentation (invited, special)

変換範囲が制限された波長変換器を用いたWDMネットワークにおける波長割当方式

S.Shimizu, N.Yamanaka, I.Sasase

電子通信学会　ネットワークシステム, 光スイッチング (沖縄) ,

2005.03

Oral presentation (general)

OBSネットワークにおいて探索パケットを使用した自己学習型経路選択方式

D.Ishii, N.Yamanaka, I.Sasase

電子通信学会　ネットワークシステム, 光スイッチング (沖縄) ,

2005.03

Oral presentation (general)

WDMネットワークにおけるシグナリングを用いた波長/経路探索方式

J.Honma, N.Yamanaka, I.Sasase

電子通信学会　ネットワークシステム, 光スイッチング (沖縄) ,

2005.03

Oral presentation (general)

OCBSにおいてあて先エッジルータまでのホップ数に依存しないQoS制御を実現するバースト信号生成方式

M.Hayashitani, D. Ishii, K.Okazaki, N.Yamanaka

電子情報通信学会フォトニックネットワーク (大阪) ,

2005.01

Oral presentation (general)

Activities of Photonic Internet Laboratories

YAMANAKA NAOAKI

Eighth International Symposium on Contemporary Photonics Technology (CPT2005) (Izumi Garden Gallery, Tokyo, Japan) ,

2005.01

Oral presentation (general)

A Scheduling algorithm for reducing unused time slots by considering head gap and tail gap in time sliced optical burst switched networks

T. Ito, D. Ishii, K. Okazaki, YAMANAKA NAOAKI, I. Sasase

The first IFIP Optical Networks & Technologies Conference 2004 (OpNeTe2004) (Pisa, Italy) ,

2004.10

Oral presentation (general)

Performance of Optical Burst Switched WDM Ring Network with TTFR system

Y. Arakawa, YAMANAKA NAOAKI, I. Sasase

The first IFIP Optical Networks & Technologies Conference 2004 (OpNeTe2004) (Pisa, Italy) ,

2004.10

Oral presentation (general)

Fast Hierarchical Concurrent Signaling in Multi-Layer GMPLS Networks

E. Oki, D. Shimazaki, K. Shiomoto, YAMANAKA NAOAKI

19th World Telecommunications Congress (WTC) (Seoul, Korea) ,

2004.09

Oral presentation (general)

Hierachical Concurrent Path Setup Scheme in Multi-layer GMPLS Networks

Eiji Oki, Daisuke Shimazaki,Kohei　Shiomoto,　and NaoakiYamanaka

OECC/COIN2004 (Yokohama,Japan) ,

2004.07

Oral presentation (general)

GMPLS Interoperability trial reports from INTEROP Event in the World

Akira Misawa, Satoru Okamoto,　Kohei　Shiomoto and NaoakiYamanaka

OECC/COIN2004 (Yokohama,Japan) ,

2004.07

Oral presentation (invited, special)

TTFR型光バースト交換リングネットワークにおけるメディアアクセス制御方式

Y.Arakawa, N.Yamanaka, I.Sasase

電子通信学会　PN研究会 (高知) ,

2004.05

Oral presentation (general)

最先端フォトニックネットワーク制御技術の現状と国際標準化動向　－フォトニックインターネットラボによるデファクト標準への挑戦ー

Y.Arakawa, N.Yamanaka, I.Sasase

電子通信学会　PN研究会 (高知) ,

2004.05

Oral presentation (general)

[講演]全光ネットワークとGMPLS標準化への日本の取り組み

YAMANAKA NAOAKI

電子情報通信学会情報ネットワーク・ネットワークシステム研究ワークショップ (沖縄) ,

2004.03

Oral presentation (invited, special)

[講演]光ネットワークとGMPLS調査研究WGオープンセミナー

YAMANAKA NAOAKI

情報通信ネットワーク産業協会(CIAJ) (東京) ,

2004

Oral presentation (invited, special)

[講演]GMPLSと全ネットワークの課題と標準化

YAMANAKA NAOAKI

OEIC・光インターコネクション技術懇談会 (東京) ,

2003.12

Oral presentation (invited, special)

超高速データ転送プロトコルおよびその実装に関する研究

T.Tsuchiya, S.Okamoto,N.Yamanaka, S.Sugawara, T.Miki

電子情報通信学会　ネットワークシステム, 光スイッチング研究会 (日本) ,

2003.12

Oral presentation (general)

MPLS+GMPLSマルチリージョンネットワークにおける相互接続実験

D.Shimazaki, E.Oki, I.Nishioka, D.Mutou, R.Kondou, M.Tanabe, N.Yamanaka

電子情報通信学会ネットワークシステム, 光スイッチング研究会 (日本) ,

2003.12

Oral presentation (general)

複数キャリアGMPLS網をベースとしたフォトニックインターネット構成　－アーキテクチャ要求条件－

S.Okamoto, E.Oki, D.Shimazaki, N.Yamanaka

電子情報通信学会ネットワークシステム, 光スイッチング研究会 (日本) ,

2003.12

Oral presentation (general)

Scalable Multi-Layer GMPLS Network Based on Hierarchical Cloud-Routers

Daisuke Shimazaki, Eiji Oki, Kohei Shiomoto, Naoaki Yamanaka

GLOBECOM2003 (San Francisco, USA) ,

2003.12

Oral presentation (general)

Photonic Internet Laboratory (PIL): New challenge for future photonic network

Naoaki Yamanaka

MPLS2003 (Washington, DC) ,

2003.10

Oral presentation (invited, special)

Photonic MPLS Network Architecture Based on Hikari-Router [Invited]

Naoaki Yamanaka

2003DRCN (Banff, Alberta, Canada) ,

2003.10

Oral presentation (invited, special)

GMPLSの現状と研究のターゲット

YAMANAKA NAOAKI

財）光産業技術振興協会　光ネットワークに関する技術・産業懇談会 (日本) ,

2003.10

Oral presentation (invited, special)

Optical VPN service using OUNI/GMPLS signaling for service assignment with HIKARI router

Akira Misawa, Satoru Okamoto, Masaru Katayama, Naoaki Yamanaka

ECOC-IOOC 2003 (Rimini, Italy) ,

2003.09

Oral presentation (general)

FUTURE OF IP BACKBONE NETWORK SERVICES COMPRISING GMPLS BASED HIKARI (PHOTONIC MPLS) ROUTERS

Satoru Okamoto, Akira Misawa, Naoaki Yamanaka

ECOC-IOOC 2003 (Rimini, Italy) ,

2003.09

Oral presentation (general)

GMPLSと日本発のフォトニックインターネット技術獲得への取り組み

YAMANAKA NAOAKI

日本学術振興会光ネットワークシステム技術第171委員会 (日本) ,

2003.07

Oral presentation (invited, special)

Performance of Dynamic Multi-Layer Routing Schemes in IP+Optical Networks

Eiji Oki, Kohei Shiomoto, Masaru Katayama, Wataru Imajuku, Naoaki Yamanaka

HPSR2003 (Torino, Italy) ,

2003.06

Oral presentation (general)

Scalable Shared-risk Group Management in Shared Mesh Restorable Wavelength Routed Networks

Kohei Shiomoto, Wataru Imajuku, Eiji Oki, Satoru Okamoto, Naoaki Yamanaka

HPSR2003 (Torino, Italy) ,

2003.06

Oral presentation (general)

フォトニックインターネット実現に向けた活動の取り組みーフォトニックインターネットラボー

YAMANAKA NAOAKI

電子情報通信学会 (日本) ,

2003.05

Oral presentation (invited, special)

GMPLSネットワークにおけるマルチレイヤダイナミックルーチング

E.Oki, K.Shiomoto, M.Katayama, W.Imajyuku, N.Yamanaka

電子情報通信学会通信方式, 電子通信学会光通信システム, 光スイッチング研究会 (日本) ,

2003.05

Oral presentation (general)

フォトニックインターネットアーキテクチャの提案

S.Okamoto, A.Misawa, K.Shiomoto, N.Yamanaka

電子情報通信学会光スイッチング研究会 (日本) ,

2003.04

Oral presentation (general)

サービス指定シグナリングを適用したOptical VPN方式の提案

A.Misawa, S.Okamoto, M.Katayama, N.Yamanaka

電子情報通信学会ネットワークシステム研究会 (日本) ,

2003.04

Oral presentation (general)

ハイアラキカルクラウドルータによるマルチレイヤネットワーク

D.Shimazaki, E.Oki, K.Shiomoto, N.Yamanaka

電子情報通信学会ネットワークシステム研究会 (日本) ,

2003.03

Oral presentation (general)

SRGを用いたリストレーション方式

K.Shiomoto, W.Imajyuku, E.Oki, S.Okamoto, N.Yamanaka, Y.Takigawa

電子情報通信学会ネットワークシステム, 光通信システム研究会 (日本) ,

2003.02

Oral presentation (general)

OXC and HIKARI router: Their use in IP over optical networks (Invited)

Satoru Okamoto, Naoaki Yamanaka

CPT2003 (Kokuyo hall, Shinagawa, Tokyo, Japan) ,

2003.01

Oral presentation (invited, special)

Multi-layer traffic engineering in photonic-GMPLS-router networks

Naoaki Yamanaka, Masaru Katayama, Kohei Shiomoto, Eiji Oki, Nobuaki Matsuura

IEEE GLOBECOM 2002 (Taipei, Taiwan, Taipei International Convention Center) ,

2002.11

Oral presentation (general)

Performance of Distributed-Controlled Dynamic Wavelength-Conversion GMPLS Networks

Eiji Oki, Daisuke Shimazaki, Kohei Shiomoto, Nobuaki Matsuura, Wataru Imajuku, Naoaki Yamanaka

Optical Communications and Networks (Shangri-La Hotel, Singapore) ,

2002.11

Oral presentation (general)

Photonic MPLS Network Architecture Based on Hikari-Router [Invited]

Naoaki Yamanaka

Optical Communications and Networks (Shangri-La Hotel, Singapore) ,

2002.11

Oral presentation (invited, special)

GMPLS-based Photonic Backbone Network (invited talk)

Naoaki Yamanaka

MPLS2002 (Omni Shoreham Hotel Washington, DC, USA) ,

2002.10

Oral presentation (general)

光ネットワークにおける動的波長変換制御の性能評価

D.Shimazaki, E.Oki, N.Matsuura, K.Shiomoto, N.Yamanaka

電子情報通信学会光スイッチング研究会 (日本) ,

2002.10

Oral presentation (general)

Adaptive transparent photonic network control techniques based on photonic-GMPLS-router network

Naoaki Yamanaka, Satoru Okamoto, Kohei Shimoto, Eiji Oki, Wataru Imajuku,

WTC-ISSA XVIII World Telecommunications Congress (Disneyland Paris, France) ,

2002.09

Oral presentation (general)

Dynamic multi-layer traffic engineering in GMPLS networks

Kohei Shimoto, Eiji Oki, Masaru Katayama, Wataru Imajuku, Naoaki Yamanaka

WTC-ISSA XVIII World Telecommunications Congress (Disneyland Paris, France) ,

2002.09

Oral presentation (general)

Optical Path Generation Strategy and Network Performance in Dynamic Multi-Layered IP+Photonic GMPLS Network

W. Imajuku, N. Nagatsu, Y. Takigawa, E. Oki, K. Shiomoto, N. Yamanaka

ECOC 2002 European Conference on Optical Communication (Bella Center, Copenhagen, Denmark) ,

2002.09

Oral presentation (general)

フォトニックインターネットの現状と課題 ―ＧＭＰＬＳによりもたらされるネットワークアーキテクチャへのインパクト―

K.Shiomoto, N.Yamanaka

電子情報通信学会インターネットアーキテクチャ研究会 (日本) ,

2002.07

Oral presentation (general)

フォトニックネットワークにおけるシグナリング方法の提案

N.Matsuura, E.Oki, M.Katayama, K.Shiomoto, N.Yamanaka

電子情報通信学会情報ネットワーク研究会 (日本) ,

2002.07

Oral presentation (general)

バックボーンネットワークノード技術－ATM，MPLS，GMPLS－

N.Yamanaka

電子情報通信学会情報ネットワーク研究会 (日本) ,

2002.07

Oral presentation (invited, special)

RSVP-TE Signaling for Photonic Networks

N. Matsuura, M. Katayama, E. Oki, K. Shiomoto, N. Yamanaka

COIN 2002 Internaitonal Conference on Optical Internet (Hyatt Regency, Cheju Island, Korea) ,

2002.06

Oral presentation (general)

Performance Evaluation of Optical Label Switching Path Routing Algorithms in Photonic Networks

M. Katayama, E. Oki, K. Shiomoto, N. Yamanaka, W. Imajuku

PS2002 2002 International Topical Meeting on Photonics in Switching (Hyatt Regency Cheju Island, Korea) ,

2002.06

Oral presentation (general)

次世代基幹系ネットワークが直面する問題点

N.Yamanaka

応用物理学会超伝導分科会 (日本) ,

2002.06

Oral presentation (invited, special)

波長割り当て・ルーティング問題に対応したGMPLSフォトニックネットワークについて

A.Misawa, K.Shiomoto, E.Oki, D.Shimazaki, M.Katayama, N.Yamanaka

電子情報通信学会通信方式, 光通信システム研究会 (日本) ,

2002.05

Oral presentation (general)

IP＋Photonicピアモデルネットワークにおける動的光パス設定方式

W.Imajyuku, E.Oki, K.Shiomoto, N.Yamanaka, N.Nagatsu,　Y.Takigawa

通信方式研究会 (日本) ,

2002.05

Oral presentation (general)

波長群を用いたフォトニックスイッチとネットワークの構成について

A.Misawa，N.Yamanaka

電子情報通信学会光スイッチング研究会 (日本) ,

2002.05

Oral presentation (general)

5-Tb/s Electro-Optical ATM Switching Hardware Components using Small Opticla WDM Packet-Switched Interconnection Modules

N. Matsuura, K. Yamakoshi, E. Oki, N. Yamanaka , T. Ohyama, Y. Akahori

ECTC Electronic Components Technology Conference (San Diego, CA, USA) ,

2002.05

Oral presentation (general)

Dynamic Deficit Round-Robin Scheduler for 5-Tb/s Switch Using Wavelength Routing

K. Yamakoshi, E. Oki, N. Yamanaka

HPSR2002 Workshop on High Performance Switching and Routing (Kobe, Japan) ,

2002.05

Oral presentation (general)

A Disjoint Path Selection Scheme with SRLG in GMPLS Networks

E. Oki, N. Matsuura, K. Shiomoto, N. Yamanaka

HPSR2002 Workshop on High Performance Switching and Routing (Kobe, Japan) ,

2002.05

Oral presentation (general)

Traffic engineering and signaling technologies in photonic-GMPLS-router networks

N. Yamanaka, S. Okamoto, K. Shiomoto, E. Oki, W. Imajuku

HPSR2002 Workshop on High Performance Switching and Routing (Kobe, Japan) ,

2002.05

Oral presentation (general)

Next Generation Carriers Internet Backbone Node Architecture (MSN Type-X)

M. Aoki, N. Yamanaka, T.Kurimoto, T. Miyaura, J. Nishikido

HPSR2002 Workshop on High Performance Switching and Routing (Kobe, Japan) ,

2002.05

Oral presentation (general)

On Performance Prediction of Address Lookup Algorithms of IP Routers through Simulation and Analysis Techniques

R. Kawabe, S. Ata, M. Murata, M. Uga, K. Shiomoto, N. Yamanaka

2002 IEEE International Conference on Communication (New York, NY USA) ,

2002.04

Oral presentation (general)

Active Queue Control Scheme for Achieving Approximately Fair Bandwidth Allocation

T. Miyamura, T. Kurimoto, K. Nakagawa, P. dhananjaya, M. Aoki, N. Yamanaka

2002 IEEE International Conference on Communication (New York, NY USA) ,

2002.04

Oral presentation (general)

Optical WDM Packet-by-packet Interconnection Modules for 5-Tb/s Electro-optical Switching System

YAMANAKA NAOAKI N. Matsuura, K. Yamakoshi, E. Oki, N. Yamanaka, T. Ohyama, Y. Akahori

2002ICEP (Dai-ichi Hotel Tokyo Seafort, Tennoz Isle, Tokyo, Japan) ,

2002.04

Oral presentation (general)

RSVP-TEによるGMPLSシグナリング拡張

N.Matsuura, M.Katayama, K.Shiomoto, N.Yamanaka

電子情報通信学会光スイッチング研究会 (日本) ,

2002.04

Oral presentation (general)

MPLambdaSネットワークにおける動的マルチレイヤトラヒックエンジニアリング

K.Shiomoto, E.Oki, M.Katayama, W.Imajyuku, N.Yamanaka

電子情報通信学会光スイッチング研究会 (日本) ,

2002.04

Oral presentation (general)

光ネットワークにおける光パスルーティングアルゴリズムの性能評価

M.Katayama, E.Oki, K.Shiomoto, N.Yamanaka, W.Imajyuku

電子情報通信学会光スイッチング研究会 (日本) ,

2002.04

Oral presentation (general)

OIFの標準化動向から見た光クロスコネクトシステム像

S.Okamoto,N.Yamanaka

電子情報通信学会光スイッチング研究会 (日本) ,

2002.04

Oral presentation (invited, special)

A Heuristic Multi-Layer Optimum Topology Design Scheme Based on Traffic Measurement for IP + Photonic Networks

E. Oki, K. Shiomoto, S. Okamoto, W. Imajuku, N. Yamanaka

OFC2002 (Anaheim, CA, USA) ,

2002.03

Oral presentation (general)

フォトニックIPネットワークにおけるマルチレイヤトラヒックエンジニアリング

E.Oki, K.Shiomoto, S.Okamoto, W.Imajyuku, N.Yamanaka

電子情報通信学会光スイッチング, 光ファイバ応用技術, 光エレクトロニクス, レーザ・量子エレクトロニクス研究会 (日本) ,

2002.01

Oral presentation (general)

5Tb/sスイッチングシステムのためのWDM光インタコネクションモジュール

N.Matsuura, H.Yamakoshi, E.Oki, N.Yamanaka, T.Oyama, Y.Akahori

光スイッチング, 光ファイバ応用技術, 光エレクトロニクス, レーザ・量子エレクトロニクス研究会 (日本) ,

2002.01

Oral presentation (general)

フォトニックIPネットワークアーキテクチャに関する検討

K.Shiomoto，E.Oki, S.Okamoto, N.Yamanaka

電子情報通信学会ネットワークシステム, 光スイッチング研究会 (日本) ,

2001.12

Oral presentation (general)

高速動作可能なQoS制御アルゴリズムについて

K.Nakagawa, T.Miyamura, T.Kurimoto, M.Aoki, N.Yamanaka

情報理論研究会 (日本) ,

2001.09

Oral presentation (general)

可変長パケットスケジューリングアルゴリズムに関する評価

T.Kurimoto, E.Oki, N.Yamanaka

電子情報通信学会ネットワークシステム, 情報ネットワーク, 通信方式研究会 (日本) ,

2001.09

Oral presentation (general)

スケーラブルなQoS制御方式の提案

T.Miyamura，T.Kurimoto，K.Nakagawa,N.Yamanaka

電子情報通信学会ネットワークシステム研究会 (日本) ,

2001.06

Oral presentation (general)

5-Tbit/s Frame-based ATM Switching System using 2.5-Gbit/s x 8 Optical WDM Links

K. Yamakoshi, K. Nakai, N. Matsuura, E. Oki, R. Kawano, N. Yamanaka

ICC2001 (Helsinki, Finland) ,

2001.06

Oral presentation (general)

Effective Switching Scheduling Algorithm Using Concatenated Data Block to Reduce Guard-Time for Opt-Electronic Packet Switch

T. Kurimoto, E. Oki, K. Nakai, N. Yamanaka

ICC2001 (Helsinki, Finland) ,

2001.06

Oral presentation (general)

次世代コアネットワークにおけるコアノードアーキテクチャの検討

M.Aoki, T.Kurimoto, K.Shiomoto, J.Nishikido，N.Yamanaka

電子情報通信学会交換システム, 情報ネットワーク研究会 (日本) ,

2001.03

Oral presentation (general)

大規模Mobile IPネットワークにおけるスケーラブルなルート最適化手法

S.Yasukawa，N.Yamanaka

交換システム, 光スイッチング研究会 (日本) ,

2000.12

Oral presentation (general)

IPパケットへの親和性を高めたWDM可変リンクを用いた大容量スイッチ構成

H.Yamakoshi, N.Matsuura, K.Nakai, S.Yasukawa, E.Oki, N.Yamanaka

交換システム, 光スイッチング研究会 (日本) ,

2000.12

Oral presentation (general)

仮想出力バッファ型光クロスポイントスイッチにおけるconcatenated data blockスケジューリングアルゴリズム

T.Kurimoto, E.Oki, K.Nakai, N.Yamanaka

交換システム, 光スイッチング研究会 (日本) ,

2000.12

Oral presentation (general)

MPLSのExplicit Routingを用いた負荷分散方式の一検討

T.Miyamura，T.Kurimoto，M.Aoki，N.Yamanaka

交換システム研究会 (日本) ,

2000.06

Oral presentation (general)

[T!, T2] SCALABLE MULTI-BS/S CELL/PACKET SWITCHING SOLUTION COMBINING IP-QOS AND ATM-QOS GUARANTEED SCHEME

S. Yasukawa, N. Yamanaka, K. Genda, E. Oki, R. Kawano

WORLD TELECOMMUNICATIONS CONGRESS (incorporating ISS2000) (Birmingham, UK) ,

2000.05

Oral presentation (general)

基幹系の通信技術からLSI及びその実現に要求する混載機能

N.Yamanaka

LSI混載プロセス・材料技術調査研究報告書II (日本) ,

2000.03

Oral presentation (invited, special)

SCALABEL 640-GBIT/S ATM SWITCHING SYSTEM WITH SELF-LOAD BALANCING MECHANISM

S. Yasukawa, N. Yamanaka, E. Oki, R. Kawano, K. Okazaki and D. Santoso

GLOBECOM'99 (Rio de Janeiro, Brazil) ,

1999.12

Oral presentation (general)

NEW TRANSFER METHODS FOR CLIENT-SERVER TRAFFIC IN ATM NETWORKS

D. Lecumberri, K. Y. Siu, P. Narvaez, M. Nabeshima, N. Yamanaka

GLOBECOM'99 (Rio de Janeiro, Brazil) ,

1999.12

Oral presentation (general)

OPTIMA:640Gb/s High-speed ATM Switching system based on 0.25μm CMOS,MCM-C and Optical WDM Interconnection

H.Yamakoshi，N.Yamanaka，R.Kawano，E.Oki，S.Yasukawa，K.Okazaki

電子情報通信学会電子部品・材料; 集積回路研究会 (日本) ,

1999.12

Oral presentation (general)

拡張可能な多並列光接続用フレーム同期回路

H.Yamakoshi，N.Yamanaka，R.Kawano

電子情報通信学会光エレクトロニクス; レーザ・量子エレクトロニクス; 光通信システム研究会 (日本) ,

1999.11

Oral presentation (general)

高速光インタコネクションを用いたMCM ATMスイッチの開発

N.Yamanaka, R.Kawano, E.Oki, A.Oki

光スイッチング研究会 (日本) ,

1999.11

Oral presentation (general)

Multiwavelength Link ATM switch based on WDM technology

N. Takaya, N. Yamanaka

APCC/OECC'99 (Beijing, China) ,

1999.10

Oral presentation (general)

光波長多重分散スケーラブルATMスイッチのシステム設計法

K.Nakai, E.Oki, R.Kawano, N.Yamanaka

電子情報通信学会　交換システム; 情報ネットワーク; 通信方式研究会 (日本) ,

1999.09

Oral presentation (general)

ATM網におけるブロックタイプトラヒック転送方式

M.Nabeshima, K.Y.Siu, N.Yamanaka

電子情報通信学会交換システム; 情報ネットワーク; 通信方式研究会 (日本) ,

1999.09

Oral presentation (general)

DEVELOPMENT OF PARALLEL OPTICAL INTERCONNECTION MODULE FOR OPTICAL I/O OF 80-Gbit/s-THROUGHPUT MCM

N. Takaya, N. Yamanaka

ECOC '99 (Nice, France) ,

1999.09

Oral presentation (general)

CARD-SIZE 10 Gbis/s OPTICAL TX/RX MODULES BASED ON MCM TECHNOLOGY FOR WDM INTERCONNECTIONS IN Tbit/s ATM SWITCHES

N. Takaya, N. Yamanaka

ECOC '99 (Nice, France) ,

1999.09

Oral presentation (general)

Tbit/s ATM Switching System Hardware Technologies in NTT

N. Yamanaka, E. Oki, S. Yasukawa, K. Genda, R. Kawano, K. Okazaki

ICCC '99 (Tokyo, Japan) ,

1999.09

Oral presentation (general)

Advanced Hardware Technologies Toward Tbit/s ATM switching system in NTT

N. Yamanaka

ECCTD '99 (Stresa, Italy) ,

1999.08

Oral presentation (invited, special)

Optical WDM Grouped Links and Dynamic Bandwidth Sharing for Scalable 3-Stage ATM Switching Systems

K. Nakai, E. Oki, N. Yamanaka

ICC '99 (Vancouver, British Columbia, Canada) ,

1999.06

Oral presentation (general)

Merging Advanced Electronic and Optical WDM Technologies for 640-Gbit/s ATM Switching System

YAMANAKA NAOAKI E. Oki, N. Yamanaka, S. Yasukawa, R. Kawano, K. Okazaki

ICC '99 (Vancouver, British Columbia, Canada) ,

1999.06

Oral presentation (general)

A 100-Gb/s Throughput ATM Switch MCM with a 320-Channel Parallel Optical I/O Interface

R. Kawano, N. Yamanaka, E. Oki, S. Yasukawa, K. Okazaki, A. Ohki, M. Usui, N. Sato, K. Katsura, Y. Ando, T. Kagawa, M. Hikita

ELECTRONIC COMPONENTS & TECHNOLOGY CONFERENCE 1999 (San Diego, California USA) ,

1999.06

Oral presentation (general)

OPTIMA: 640 Gb/s High-speed ATM Switching system based on 0.25 オmCMOS, MCM-C, and Optical WDM Interconnection

N. Yamanaka, R. Kawano, E. Oki, S. Yasukawa, K. Okazaki

ELECTRONIC COMPONENTS & TECHNOLOGY CONFERENCE 1999 (San Diego, California USA) ,

1999.06

Oral presentation (general)

Scalable-Distributed-Arbitration ATM Switch SuSupporting Multiples QoS Classes

E. Oki, N. Yamanaka, M. Nabeshima

IEEE ATM Workshop '99 (Kochi City, Kochi, Japan) ,

1999.05

Oral presentation (general)

The i-QOCF (iterative quasi-oldest-cell-first) Algorithm for Input-Queued ATM Switches

M. Nabeshima, N. Yamanaka

IEEE ATM Workshop '99 (Kochi City, Kochi, Japan) ,

1999.05

Oral presentation (general)

Distributed Traffic Control Method for Tbit/s Multi-stage ATM Switching Systems

K. Nakai, Eiji Oki, N. Yamanaka

IEEE ATM Workshop '99 (Kochi City, Kochi, Japan) ,

1999.05

Oral presentation (general)

A Nonblocking Multi-stage ATM Switch using Cell-based Routing with a Hierarchical Cell Sorting Mechanism

D. Santoso, S. Yasukawa, N. Yamanaka, T. Miki

IEEE ATM Workshop '99 (Kochi City, Kochi, Japan) ,

1999.05

Oral presentation (general)

波長多重リンクATMスイッチにおける WDMインターコネクションの開発

N.Takaya，N.Yamanaka

交換システム研究会 (日本) ,

1999.05

Oral presentation (general)

80Gb／s 光I／O＾＾－インターフェース MCM ATMスイッチモジュールの開発

R.Kawano, N.Yamanaka, E.Oki, K.Okazaki, S.Yasukawa, A.Oki

交換システム研究会 (日本) ,

1999.05

Oral presentation (general)

A 10-Gb/s 4x2 CMOS/SIMOX Switch LSI for a 640 Gb/s ATM switching System

Y. Ohtomo, E. Oki, N. Yamanaka

COOL Chips II (Kyoto Research Park, Kyoto) ,

1999.04

Oral presentation (general)

80-Gbit/s MCM-C technologies for high-speed ATM switching systems

K. Okazaki, N. Sugiura, A. Harada, N. Yamanaka, E. Oki

1999 International Conference on High Density Packaging and MCMs (The Adam's Mark Hotel Denver, Colorado) ,

1999.04

Oral presentation (general)

TA9.6 A 10 Gb/s (1.25 Gb/sx8) 4x2 CMOS/SIMOCATM Switch

E. Oki, N. Yamanaka, Y. Ohtomo

IEEE INTERNATIONAL SOLID-STATE CIRCITS CONFERENCE (SAN FRANCISCO) ,

1999.02

Oral presentation (general)

高速プッシュ型ネットワーク構成法

N.Yamanaka, E.Oki

電子情報通信学会交換システム、光通信システム研究会 (日本) ,

1999.01

Oral presentation (general)

光波長多重可変リンク速度型ATMスイッチにおけるトラヒック制御方式

K.Nakai, E.Oki, N.Yamanaka

電子情報通信学会交換システム、光通信システム研究会 (日本) ,

1999.01

Oral presentation (general)

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