論文 - 山中　直明

連続送信型フレームを用いたアクティブ光アクセスネットワークのレンジング方式

徳橋和将, 芦沢國正, 石井大介, 荒川豊, 岡本聡, 山中直明

電子情報通信学会和文論文誌 J93-B （ 8 ） 1087-1091 2010年03月

研究論文（学術雑誌）, 共著

　概要を見る

光スイッチを用いた次世代光アクセス網において, 複数の距離の違うOLT とONU 間で回線確立を行うレンジング処理について, 連続送信型フレームを用い, さらに位相を変化させる高精度レンジング手法を提案した. また連続送信型レンジングの実験に成功した.

Interoperability Experiment of VLAN Tag Swapped Ethernet and Transmitting High Definition Video through the Layer-2 LSP between Japan and Belgium

Sho Shimizu, Wouter Tavernier, Kou Kikuta, Masahiro Nishida, Daisuke Ishii, Satoru Okamoto, Didier Colle, Mario Pickavet, Piet Demeester,YAMANAKA NAOAKI

電子情報通信学会英文論文誌 E93.B （ 3 ） 736-740 2010年03月

研究論文（学術雑誌）, 共著

　概要を見る

The first global interoperability experiment of GMPLS controlled Ethernet with VLAN tag swapping between two different implementations is successfully demonstrated. High definition video streaming is realized through a newly established Layer 2 Label Switched Path (L2-LSP). The results of this experiment can be applied to designing reliable Layer 2 networks.

Evaluation of prototype for 10Gbps active optical access system

Wakayama Koji, Hasegawa Chie, Ishii Daisuke, Yamanaka Naoaki

  436 - 437 2010年

　概要を見る

<p>We evaluated a prototype for 10Gbps Active Optical Access System in which optical switches are used instead of optical splitters in PON. We demonstrate that it achieved optical signal transmission over 40km.</p>

Resource Minimization Method Satisfying Delay Constraint for Replicating Large Contents

Sho Shimizu, Hiroyuki Ishikawa, Yutaka Arakawa, Kosuke ShibaYAMANAKA NAOAKI

IEICE Transactions on Communications E92-B （ 10 ） 3102-3110 2009年10月

研究論文（学術雑誌）, 共著

　概要を見る

How to minimize the number of mirroring resources under a QoS constraint (resource minimization problem) is an important issue in content delivery networks. This paper proposes a novel approach that takes advantage of the parallelism of dynamically reconfigurable processors (DRPs) to solve the resource minimization problem, which is NP-hard. Our proposal obtains the optimal solution by running an exhaustive search algorithm suitable for DRP. Greedy algorithms, which have been widely studied for tackling the resource minimization problem, cannot always obtain the optimal solution. The proposed method is implemented on an actual DRP and in experiments reduces the execution time by a factor of 40 compared to the conventional exhaustive search algorithm on a Pentium 4 (2.8 GHz).

Multi-Domain VLAN Path Signaling Method having Tag Swapping Function for GMPLS controlled Wide Area Layer-2 Network

Kou KIKUTA, Masahiro NISHIDA, Daisuke ISHII, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Transactions on Communications E92-B （ 04 ）  2009年04月

研究論文（学術雑誌）, 単著

　概要を見る

A multi-domain GMPLS layer-2 switch capable network with VLAN tag swapping is demonstrated for the first time. In this demonstration, we verify three new features; establishing path with designating VLAN IDs, swapping VLAN ID on prototype switch, and management of VLAN IDs per domain. Using those three features, carrier-class multi-domain Ethernet backbone networks which supports independently resource management per domain can be established.

Frame Loss Evaluation of Optical Layer 10 Gigabit Ethernet Protection Switching using PLZT Optical Switch System

Satoru Okamoto, Sho Shimizu, Yutaka Arakawa,YAMANAKA NAOAKI

IEICE Transactions on Communications E92-B （ 3 ）  2009年03月

研究論文（学術雑誌）, 共著

　概要を見る

Frame loss of the optical layer protection switching using Plum bum Lanthanum Zirconium Titanium (PLZT) optical switch is evaluated. Experimental results show that typically 62 us guard time is required for commercially available non-burst mode 10 Gigabit Ethernet modules.

Performance Evaluation of Grid Computing with Parallel Routes Transmission

Hiroyuki MIYAGI, Yusuke OKAZAKI, Ryota USUI, Yutaka ARAKAWA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Transactions on Communications E91-B （ 12 ） 3882-3885 2008年12月

研究論文（学術雑誌）, 共著

GMPLS-based optical slot switching access-distribution network with a 10 ns high-speed PLZT optical switch

Masahiro Hayashitani, Teruo Kasahara, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI, Naganori Takezawa, Keiichi Nashimoto

JOURNAL OF OPTICAL NETWORKING 7 （ 8 ） 744-758 2008年08月

研究論文（学術雑誌）, 共著

Multi-ASON and GMPLS Network Domain Interworking Challenges

Satoru Okamoto, Hideki Otsuki, Tomohiro Otani

IEEE Communications Magazine 46 （ 6 ）  2008年06月

研究論文（学術雑誌）, 共著

10ns High-speed PLZT optical content distribution system having slot-switch and GMPLS controller

Masahiro Hayashitani, Teruo Kasahara, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, YAMANAKA NAOAKI, Naganori Takezawa, Keiichi Nashimoto

IEICE Electronics Express 5 （ 6 ） 181-186 2008年03月

研究論文（学術雑誌）, 共著

Advanced Wavelength Reservation Method Based on Deadline-Aware Scheduling for Lambda Grid Networks

Hiroyuki Miyagi, Masahiro Hayashitani, Daisuke Ishii, Yutaka Arakawa, YAMANAKA NAOAKI

IEEE/OSA Journal of Lightwave Technology 25 （ 10 ） 2904-2910 2007年10月

研究論文（学術雑誌）, 共著

Optical burst switched ring network with upstream prioritized switching and distributed fairness control

Arakawa Yutaka, Yamanaka Naoaki, Sasase Iwao

Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) 90 （ 8 ） 30 - 39 2007年08月

ISSN  8756-6621

　概要を見る

<p>With a view to constructing a metropolitan network that can flexibly handle highly bursty traffic, an optical burst switched ring network with upstream prioritized switching and distributed fairness control is proposed. In optical burst switching, high burst drop rates at intermediate nodes constitute a problem. In the proposed system, burst signal dropping at the relay nodes is eliminated by means of upstream prioritized switching. At the same time, by using distributed fairness control, the problem of upstream prioritized switching-related unfairness, in which positional priority provides higher priority to more distant transmission nodes, is resolved. Further, by modifying the reservation of downstream nodes by using the trailer packet after disconnection of the transmission, unnecessary bandwidth is eliminated and the throughput is improved. By computer simulation, the throughput and the fairness with regard to the throughput are evaluated. It is shown that the proposed architecture exhibits excellent characteristics even in cases of hot-spot traffic, in which concentrated traffic occurs at a particular destination. © 2007 Wiley Periodicals, Inc.</p>

• Access to Document (DOI)

GMPLS interoperability tests in Kei-han-na Info-Communication Open Laboratory on JGN II network

Satoru Okamoto, Wataru Imajuku, Tomohiro Otani, Itaru Nishioka, Akira Nagata, Mikako Nanba, Hideki Otsuki, Masatoshi Suzuki, YAMANAKA NAOAKI

IEICE Transactions on Communications VOL.E90-B （ No.8 ） 1936-1943 2007年08月

研究論文（研究会，シンポジウム資料等）, 共著

QoS differentiation scheme with multiple burst transmission and virtual resource reservation for optical burst switching networks

Yutaka Arakawa and YAMANAKA NAOAKI

JOURNAL OF OPTICAL NETWORKING 6 （ 8 ） 1003-1013 2007年08月

研究論文（学術雑誌）, 共著

Special section on feature topics on latest trends in optical networks

Murata Masayuki, Shiomoto Kohei, Nakano Yoshiaki, Namiki Shu, Sato Ken Ichi, Yamanaka Naoaki

IEICE Transactions on Communications E90-B （ 8 ） 1889 2007年08月

ISSN  0916-8516

• Access to Document (DOI)

GMPLSの標準化と実用化動向

岡本 聡、山中 直明

電子情報通信学会誌 89 （ 8 ） 752-757 2006年08月

研究論文（学術雑誌）, 共著

Wavelength assignment scheme for WDM networks with limited-range wavelength converters

Sho Shimizu, Yutaka Arakawa, YAMANAKA NAOAKI

Journal of Optical Networking 5 （ 5 ） 410-421 2006年05月

研究論文（学術雑誌）, 共著

上流優先スイッチングと分散公平性制御を用いた光バースト交換リングネットワーク

荒川豊, 山中直明, 笹瀬巌

IEICE TRANSACTION on Communication(JAPANESE EDITION) vol.J89-B （ No.2 ） 242-252 2006年02月

研究論文（研究会，シンポジウム資料等）, 共著

Self-learning route selection scheme using multipath searching packets in an OBS Network

石井大介、山中 直明、笹瀬巌

Journal of Optical Networking Vol.4 （ No.7 ） 432-445 2005年07月

研究論文（学術雑誌）, 共著

A 10Gb/s Firewall System for Network Security in Photonic Era

片山勝、甲斐英則、吉田順一、井波正明、山田博希、塩本公平、山中 直明

IEICE TRANSACTIONS on Communications VOL.E88-B （ NO.5 ） 1914-1920 2005年05月

研究論文（研究会，シンポジウム資料等）, 共著