Bidirectional Path Setup Scheme Using on Upstream Label Set in Optical GMPLS Networks(Network)

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概要

• 論文の詳細を見る

• Generalized Multi-Protocol Label Switching (GMPLS) is being developed in the Internet Engineering Task Force (IETF). In GMPLS-based wavelength-division-multiplexing (WDM) optical networks, a wavelength in a fiber is used as a label. In the existing GMPLS signaling protocol for bidirectional paths in WDM networks with the wavelength continuity constraint, bidirectional path setup fails with high probability because the upstream label allocated by the previous hop node may not be accepted at the transit node. To solve this problem, this paper proposes an efficient bidirectional label switched path (LSP) setup scheme based on an upstream label set. Called the Upstream Label Set (ULS) scheme, it is an extension of the existing GMPLS signaling protocol. The ULS scheme is consistent with the existing GMPLS signaling procedure and so offers backward compatibility. The numerical results suggest that when the number of the LSP setup retries is limited, the ULS scheme offers lower blocking probability than the existing GMPLS signaling scheme which uses only with the upstream label (UL). In addition, under the condition that the constraint of the number of LSP setup retries is relaxed, the LSP setup time of the ULS scheme is faster than that of the existing scheme. Furthermore, by using our developed prototype of the GMPLS control system, in which the ULS scheme was installed, we demonstrated that the ULS scheme successfully setup bidirectional LSPs.

• 社団法人電子情報通信学会の論文
• 2004-06-01

著者

• OKI Eiji

  Dept. of Information and Communication Engineering, The University of Electro-Communications

• Shiomoto Kohei

  Ntt Network Service Systems Labs

• Shiomoto K

  Ntt Corp. Musashino‐shi Jpn

• Shiomoto Kohei

  Ntt Network Innovation Laboratories Ntt Corporation

• Oki Eiji

  University of Electro-Communications

• MATSUURA Nobuaki

  NTT Network Service Laboratories, NTT Corporation

• Shiomoto Kohei

  Network Service Systems Laboratories Ntt Corporation

• Oki E

  Department Of Information And Communication Engineering The University Of Electro-communications

• Oki Eiji

  Univ. Electro‐communications Chofu‐shi Jpn

• Oki Eiji

  Ntt Netwok Service Systems Laboratories

• Yamanaka N

  Faculty Of Science And Technology Keio University

• Yamanaka Naoaki

  Department Of Information And Computer Science Faculty Of Science And Technology Keio University

• Yamanaka Naoaki

  Ntt Netwok Service Systems Laboratories

• Matsuura Nobuaki

  Ntt Network Service Systems Laboratories Ntt Corporation

• Matsuura Nobuaki

  Ntt Network Service Laboratories Ntt Corporation

• Oki Eiji

  Dept. Of Communication Engineering And Informatics The University Of Electro-communications

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