論文 - 山中　直明

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

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

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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>

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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

Dynamic multilayer routing schemes in GMPLS-based IP+optical networks

Oki Eiji, Shiomoto Kohei, Shimazaki Daisaku, Yamanaka Naoaki, Imajuku Wataru, Takigawa Yoshihiro

IEEE Communications Magazine 43 （ 1 ） 108 - 114 2005年01月

ISSN  0163-6804

　概要を見る

<p>This article presents two dynamic multilayer routing policies implemented in the photonic MPLS router developed by NTT for IP+optical generalized MPLS networks. According to IP traffic requests, wavelength paths called lambda label switched paths are set up and released in a distributed manner based on GMPLS routing and signaling protocols. Both dynamic routing policies first try to allocate a newly requested electrical path to an existing optical path that directly connects the source and destination nodes. If such a path is not available, the two policies employ different procedures. Policy 1 tries to find available existing optical paths with two or more hops that connect the source and destination nodes. Policy 2 tries to establish a new one-hop optical path between source and destination nodes. The performances of the two routing policies are evaluated. Simulation results suggest that policy 2 outperforms policy 1 if p is large, where p is the number of packet-switching-capable ports; the reverse is true only if p is small. We observe that p is the key factor in choosing the most appropriate routing policy. We also describe items that need to be standardized in the IETF to effectively achieve multilayer traffic engineering. © 2005 IEEE.</p>

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A scheduling algorithm for reducing unused timeslots by considering head gap and tail gap in Time Sliced Optical Burst Switched networks

Ito Takanori, Ishii Daisuke, Okazaki Kohei, Yamanaka Naoaki, Sasase Iwao

IFIP Advances in Information and Communication Technology （IFIP）  164   79 - 86 2005年

研究論文（学術雑誌）, 共著

　概要を見る

<p>We propose a scheduling algorithm for reducing unused timeslots by considering head gap and tail gap newly generated by assigning a data burst in order to improve the burst loss probability and the throughput performances in Time Sliced Optical Burst Switched (TSOBS) networks. The proposed scheduling algorithm selects the timeslot in which either head gap or tail gap newly generated becomes the minimum. We show that the proposed scheduling algorithm can improve the burst loss probability and the throughput performances as compared with the conventional one. © 2005 by International Federation for Information Processing.</p>

A 10Gb/s wire-speed firewall system using reconfigurable processors

Katayama M., Kai H., Yoshida J., Yamada H., Shiomoto K., Yamanaka N.

IEEE International Conference on Communication ICC2005    300 - 305 2005年

研究論文（国際会議プロシーディングス）

　概要を見る

<p>Although the Internet is playing an increasingly significant role in global communication, it remains vulnerable to malicious traffic such as worms and DoS/DDoS attacks. In the last few years, the emergence of high speed active worms, such as Code Red II, Nimda, SQL Slammer and MS Blaster, has become a serious issue. These worms cause serious damage to communication networks throughout the world by using up network bandwidth. In addition, since conventional firewall systems are located just in front of the server and do not prevent malicious traffic from entering the network, they cannot prevent such network congestion. We have developed a proto-type system of a network firewall using reconfigurable processors. In this paper, we overview the developed system and present its evaluation results. © 2005 IEEE.</p>

Scalable multi-layer GMPLS networks based on hierarchical cloud-routers

Shimazaki Daisaku, Oki Eiji, Shiomoto Kohei, Yamanaka Naoaki

IEICE Transactions on Communications E88-B （ 3 ） 1119 - 1127 2005年

ISSN  0916-8516

　概要を見る

<p>This paper proposes the hierarchical cloud-router network (HCRN) to overcome the scalability limit in a multi-layer generalized multi-protocol label switching (GMPLS) network. We define a group of nodes as a virtual node, called the cloud-router (CR). A CR consists of several nodes or lower-level CRs. A CR is modeled as a multiple switching capability (SC) node when it includes more than one kind of SC, which is fiber SC, lambda SC, time-division multiplexing (TDM) SC, packet SC, even if there are no actual multiple switching capability nodes in the CR. The CR advertises its abstracted CR internal structure, which is abstracted link state information inside the CR. A large-scale, multi-layer network can then achieve scalability by advertising the CR internal structure throughout the whole network. In this scheme, the ends of a link connecting two CRs are defined as interfaces of the CRs. We adopt the CR internal cost scheme between CR interfaces to abstract the network. This CR internal cost is advertised outside the CR via the interfaces. Our performance evaluation has shown that HCRN can handle a larger number of nodes than a normal GMPLS network. It can also bear more frequent network topology changes than a normal GMPLS network. Copyright © 2005 The Institute of Electronics, Information and Communication Engineers.</p>

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