Details of a Researcher - Yamanaka, Naoaki

Presentations -

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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.

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