論文 - 山中　直明

Delivery Management System Based on Vehicles Monitoring and a Machine-Learning Mechanism

Habault G., Taniguchi Y., Yamanaka N.

IEEE Vehicular Technology Conference （IEEE Vehicular Technology Conference）  2018-August 2018年07月

共著

　概要を見る

The continuously growing online shopping is increasing the number of attended home deliveries. The last-mile delivery plays an important role in online shopping satisfaction and especially for food deliveries. This paper focuses on food delivery retailers and particularly investigates the possibility to enhance deliveries using information and data knowledge. In fact, in addition to optimize and to share delivery routes, delivery vehicles could be monitored in order to always maintain shortest delivery delays. We propose in this paper a delivery management architecture targeting these principles. This system is composed of several core mechanisms that should keep delivery delays to a minimum while maintaining low service times. A proof-of-concept of this delivery management system has been developed using Electric Scooters, smartphones and several algorithms. It demonstrates how this architecture could work in a food delivery scenario.

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Application-triggered automatic distributed cloud/network resource coordination by optically networked inter/intra data center [invited]

Yamanaka N., Okamoto S., Hirono M., Imakiire Y., Muro W., Sato T., Oki E., Fumagalli A., Veeraraghavan M.

Journal of Optical Communications and Networking （Journal of Optical Communications and Networking）  10 （ 7 ） B15 - B24 2018年07月

研究論文（国際会議プロシーディングス）, 共著,  ISSN  19430620

　概要を見る

Everything is being connected to the Cloud and Internet of Things, and network robots with big data analy- sis are creating important applications and services. The cloud network architecture is moving towards mega-cloud data centers (DCs) provided by companies such as Amazon and Google in combination with distributed small DCs or edge computers. While the traditional restrictions im- posed by distance and bandwidth are being overcome by the development of advanced optical interconnection, modern applications impose more complex performance and quality of service requirements in terms of processing power, response time, and data amount. The rise in cloud perfor- mance must be matched by improvements in network per- formance. Therefore, we propose an application-triggered cloud network architecture based on huge-bandwidth optical interconnections. This paper addresses edge/center cloud and edge/edge integration with the use of virtual ma- chine migration. In addition, to reduce energy consumption, an application-triggered intra-DC architecture is described. Using the proposed architectures and technologies can real- ize energy-efficient and high-performance cloud service.

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Dynamic energy efficient virtual link resource reallocation approach for network virtualization environment

Zhang S., Sato T., Okamoto S., Yamanaka N.

IEICE Transactions on Communications （IEICE Transactions on Communications）  E101B （ 7 ） 1675 - 1684 2018年07月

共著,  ISSN  09168516

　概要を見る

The energy consumption of network virtualization environments (NVEs) has become a critical issue. In this paper, we focus on reducing the data switching energy consumption of NVE. We first analyze the data switching energy of NVE. Then, we propose a dynamic energy efficient virtual link resource reallocation (eEVLRR) approach for NVE. eEVLRR dynamically reallocates the energy efficient substrate resources (sresources) for virtual links with dynamic changes of embeddable s-resources to save the data switching energy. In order to avoid traffic interruptions while reallocating, we design a cross layer application-session-based forwarding model for eEVLRR that can identify and forward each data transmission flow along the initial specified substrate data transport path until end without traffic interruptions. The results of performance evaluations show that eEVLRR not only guarantees the allocated s-resources of virtual links are continuously energy efficient to save data switching energy but also has positive impacts on virtual network acceptance rate, revenues and s-resources utilization.

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First experimental demonstration of disaggregated emergency optical system for quick disaster recovery

Shiraiwa M., Yoshikane N., Xu S., Tsuritani T., Miyata N., Mori T., Miyabe M., Katagiri T., Yoshida S., Tanaka M., Hayashi T., Sugiyama H., Satou I., Mikuni M., Okamoto S., Yamanaka N., Awaji Y., Wada N.

2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings （2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings）     1 - 3 2018年06月

研究論文（国際会議プロシーディングス）, 共著

　概要を見る

We demonstrated the effectiveness of a portable emergency optical system in disaster recovery. The system replaces functional units of damaged optical network and recovers a controlplane network by taking the advantage of surviving wireless access.

Flow/application triggered SDN control in hybrid data-center network 'HOLST'

Imakiire Y., Hirono M., Murakami M., Okamoto S., Yamanaka N.

2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings （2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings）     1 - 2 2018年06月

共著,  ISSN  9781943580385

　概要を見る

We have proposed a new data-center network architecture 'HOLST' with dynamic and adaptive network configuration for reducing power consumption. This demonstration shows the method of detecting and assigning flows from traffic and application trigger.

Novel Automatic Service Restoration Technique by Using Self-Reconfiguration of Network Resources for a Disaster-struck Metro-Access Network

Kanai T., Senoo Y., Asaka K., Sugawa J., Tamai H., Saito H., Minato N., Oguri A., Sumita S., Sato T., Kikuchi N., Matsushita S., Tsuritani T., Okamoto S., Yamanaka N., Suzuki K., Otaka A.

Journal of Lightwave Technology （Journal of Lightwave Technology）  36 （ 8 ） 1516 - 1523 2018年04月

共著,  ISSN  07338724

　概要を見る

This paper shows the concept of the elastic lambda aggregation network (EλAN) that will achieve an elastic common access infrastructure for the metro-access network. It proposes a service restoration technique that uses optical path switching and intercentral office handover for EλAN to recover from disasters. The feasibility of the proposed service restoration technique is successfully demonstrated for the first time by using a prototype testbed of a metro-access network. By applying both orthogonal frequency division multiplexing and adaptive modulation, the system automatically changes the transmission parameters (modulation level, the number of subcarriers, and symbol rate) according to the service requirements and conditions of the optical distribution network, such as the link's end-to-end optical loss, in order to achieve accommodate multiple services. In the experiment, an optical network unit in a faulted system automatically reconnected within 10 s to another office 20-km away with the same throughput.

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SDN-enabled headroom services for high-speed data transfers

Alali F., Lin X., Veeraraghavan M., Yamanaka N., Sun W.

2017 23rd Asia-Pacific Conference on Communications: Bridging the Metropolitan and the Remote, APCC 2017 （2017 23rd Asia-Pacific Conference on Communications: Bridging the Metropolitan and the Remote, APCC 2017）  2018-January   1 - 6 2018年02月

研究論文（国際会議プロシーディングス）, 共著

　概要を見る

WAN provider links are often operated at low utilization levels, which leaves large unused capacity (headroom). In this paper, we propose using Software Defined Networking (SDN) controllers to support novel Static Headroom (SH) and Dynamic Headroom (DH) services to allow customers to fill this headroom with Elephant Flows (EFs) without adversely affecting the provider's ability to meet its Best-Effort (BE) service-level agreements, and ability to absorb extra traffic load created during failure recovery periods. Our solution calls for the use of lower-priority service for EFs. We use simulations to compare SH service with BE service, and DH service with SH service. When EFs are sent on BE service, they could cause packet losses in general-purpose IP traffic, especially when the burstiness of the latter is high, while with SH service, this packet loss rate is reduced to 0. While DH service requires the added complexity of a provider SDN controller, the ability to dynamically route EFs on lower-utilized links results in higher average EF throughput. The higher the non-uniformity (from a node-pair perspective) in network traffic, the greater the DH gain factor.

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Flow/application triggered SDN control in hybrid datacenter network “HOLST“

Imakiire Y., Hirono M., Murakami M., Okamoto S., Yamanaka N.

Proceeding on Optical Fiber Communication, OFC2018, Part F84 （Optics InfoBase Conference Papers）  Part F84-OFC 2018 2018年

研究論文（国際会議プロシーディングス）, 共著

　概要を見る

We have proposed a new dtwork architecture “HOLST“ with dynamic and adaptive network configuration for reducing power consumption. This demonsata-center netration shows the method of detecting and assigning flows from traffic and application trigger.

• Access to Document (DOI)

First experimental demonstration of disaggregated emergency optical system for Quick Disaster Recovery

Shiraiwa M., Yoshikane N., Xu S., Tsuritani T., Miyata N., Mori T., Miyabe M., Katagiri T., Yoshida S., Tanaka M., Hayashi T., Sugiyama H., Satou I., Mikuni M., Okamoto S., Yamanaka N., Awaji Y., Wada N.

Proceeding on Optical Fiber Communication, OFC2018, Part F84 （Optics InfoBase Conference Papers）  Part F84-OFC 2018 2018年

研究論文（国際会議プロシーディングス）, 共著

　概要を見る

We demonstrated the effectiveness of a portable emergency optical system in disaster recovery. The system replaces functional units of damaged optical network and recovers a controlplane network by taking the advantage of surviving wireless access.

• Access to Document (DOI)

Network Function Virtualization: A Survey

Malathi VEERARAGHAVAN, Takehiro SATO, Molly BUCHANAN, Reza RAHIMI, Satoru OKAMOTO, YAMANAKA NAOAKI

電子情報通信学会英文論文誌 E100-B （ 11 ） 1978 - 1991 2017年11月

研究論文（学術雑誌）, 共著

超高速パケットネットワーク技術

山中 直明, 大木英司

電子情報通信学会和文論文誌 B J100-B （ 9 ） 611 - 625 2017年09月

研究論文（学術雑誌）, 共著

Experimental evaluation of fault recovery methods in Elastic Lambda Aggregation Network

Takehiro Sato, Yoshihiro Isaji, Yusuke Nakajima, Satoru Okamoto, Naoaki Yamanaka

IEICE Communications Express (ComEX) 6 （ 9 ） 507 - 512 2017年09月

研究論文（学術雑誌）, 共著

Optical Networking Paradigm: Past, Recent Trends and Future Directions

Eiji Oki, Naoya Wada, Satoru Okamoto, YAMANAKA NAOAKI, Kenichi Sato

電子情報通信学会英文論文誌 E100-B （ 9 ） 1564 - 1580 2017年09月

研究論文（学術雑誌）, 共著

　概要を見る

Software defined networking (SDN) and OpenFlow, which enables the abstraction of vendor/technology-specific attributes, improve the network control and management flexibility of optical transport networks. In this paper, we present an interoperability demonstration of SDN/OpenFlow-based optical path control for multi-domain/multi-technology optical transport networks. We also summarize the abstraction approaches proposed for multi-technology network integration at an SDN controller.

光メトロ・アクセス統合型ネットワーク向け光アドホックネット ワーク

伊佐治義大, 佐藤丈博, 岡本聡, 山中 直明, 大木英司

電子情報通信学会和文論文誌 B J100-B （ 7 ） 469 - 479 2017年07月

研究論文（学術雑誌）, 共著

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

Mirai CHINO, Misato KAMIO, Jun MATSUMOTO, Eiji OKI, Satoru OKAMOTO, YAMANAKA NAOAKI

電子情報通信学会英文論文誌 E100-B （ 6 ） 962 - 973 2017年06月

研究論文（学術雑誌）, 共著

Highlights from IEEE HPSR 2016 17th International Conference on High Performance switching and Routing

YAMANAKA NAOAKI, Eiji Oki

IEICE Communication Society -GLOBAL NEWSLETTER 40 （ 4 ） 21 - 23 2016年12月

研究論文（学術雑誌）, 共著

Demonstration of SDN/OpenFlow-based Path Control for Large-Scale Multi-Domain/Multi-Technology Optical Transport Networks

Shan Gao, Xiaoyuan Cao, Takehiro Sato, Takaya Miyazawa, Sota Yoshida, Noboru Yoshikane, Hiroaki Harai, Satoru Okamoto, YAMANAKA NAOAKI

電子情報通信学会英文論文誌 E99-B （ 7 ） 1492 - 1500 2016年07月

研究論文（学術雑誌）, 共著

　概要を見る

Software defined networking (SDN) and OpenFlow, which enables the abstraction of vendor/technology-specific attributes, improve the network control and management flexibility of optical transport networks. In this paper, we present an interoperability demonstration of SDN/OpenFlow-based optical path control for multi-domain/multi-technology optical transport networks. We also summarize the abstraction approaches proposed for multi-technology network integration at an SDN controller.

Route Partitioning Scheme for Elastic Optical Networks with Hitless Defragmentation

Seydou Ba, Bijoy Chand Chatterjee, Satoru Okamoto, YAMANAKA NAOAKI, Andrea Fumagalli, Eiji Oki

Journal of Optical Communications and Networking (JOCN) 8 （ 6 ） 356 - 370 2016年06月

研究論文（学術雑誌）, 共著

　概要を見る

Hitless defragmentation has been introduced as an approach to limit the spectrum fragmentation in elastic optical networks without traffic disruption. It facilitates the accommodation of new request by creating large spectrum blocks, as it moves active lightpaths (retuning) to fill in gaps left in the spectrum by expired ones. Nevertheless, hitless defragmentation witnesses limitations for gradual retuning with the conventionally used first fit allocation. The first fit allocation stacks all lightpaths to the lower end of the spectrum. This leads to a large number of lightpaths that need to be retuned and are subject to interfere with each other’s retuning. This paper proposes a route partitioning scheme for hitless defragmentation in order to increase the admissible traffic in elastic optical networks. The proposed scheme uses route partitioning with the first-last fit allocation to increase the possibilities of lightpath retuning by avoiding the retuning interference among lightpaths. The first-last fit allocation is used to set a bipartition with one partition allocated with the first fit and the second with the last fit. Lightpaths that are allocated on different partitions cannot interfere with each other. Thus the route partitioning avoids the interferences among lightpaths when retuning. We define the route partitioning problem as an optimization problem to minimize the total interferences. We then introduce an integer linear programming problem (ILP) that yields an optimal routing and partitioning. We prove that the route partitioning problem is NP-hard. We present a heuristic algorithm for large networks, where the ILP to represent the route partitioning is not tractable. The simulation results show that the proposed route partitioning scheme using first-last fit outperforms the conventional first fit allocation for hitless defragmentation in term of allowable traffic.

VM稼働状況を考慮したHOPR導入データセンタネットワーク制御方式

林谷昌洋, 鈴木一哉, 山中 直明

電子情報通信学会和文論文誌 B J99-B （ 4 ） 334 - 344 2016年04月

研究論文（学術雑誌）, 共著

エラスティック光アグリゲーションネットワークにおけるTDMAによるOLT仮想化を用いたONU接続保持手法

佐藤 丈博, 小番 麻斗, 竹下 秀俊, 岡本 聡, 山中 直明, 大木 英司

電子情報通信学会 和文論文誌B J99-B （ 3 ） 206 - 218 2016年03月

研究論文（学術雑誌）, 共著

　概要を見る

エラスティック光アグリゲーションネットワーク (EλAN)では, 柔軟に光アクセスパスを再構成可能なActive Optical Distribution Network (ODN)を備え, ネットワーク障害発生時に他局舎のOptical Line Terminal (OLT)はOptical Network Unit (ONU)を再収容し, 接続性を回復することが期待されている. しかし, OLTが収容可能なONUの数には上限があるため, 大規模な災害の発生等により生存OLT数が限定された状況下では, 多数の生存ONUが収容不可能になるという課題がある. 本論文では, Time Division Multiple Access (TDMA)によりOLTを仮想化し接続するONU群を順次切り替えることで, OLTの本来の収容可能数を超えたONUの接続保持を可能とする手法を提案する. 提案方式ではProxyの挿入により, 通信間隔増大によるサービス品質への影響を緩和する. 数式によるモデル化により, 提案方式ではリストレーション方式と比較して多数のONUの接続性を保持可能であることを示した. また, EλANプロトタイプシステムを用いた実験により, Proxy挿入によるUDPパケットの無損失化, およびTCPスループットの最大9.8Mbpsの改善を確認した.