北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (3): 66-69.doi: 10.13190/jbupt.200703.66.134

• 论文 • 上一篇    下一篇

格状光网络双链路故障P圈保护算法

臧云华 郑露滴 张杰 顾畹仪   

  1. 北京邮电大学光通信中心
  • 收稿日期:2006-07-28 修回日期:2006-12-15 出版日期:2007-06-30 发布日期:2007-06-30
  • 通讯作者: 臧云华

A Novel P_Cycle Protection Algorithm for Dual Link Failures in Mesh Optical Networks

ZANG Yun-hua1 , LI Jian1 ,ZHANG Jie1 Gu Wan-yi1 ZHENG Lu-di2   

  1. 1. Key Laboratory of Optical Communication and Lightwave Technologies, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876,China ; 2.Bell Labs Research China for Lucent Technologies, Beijing 100080, China
  • Received:2006-07-28 Revised:2006-12-15 Online:2007-06-30 Published:2007-06-30
  • Contact: ZANG Yun-hua

摘要:

针对MESH光网络中两条链路同时发生故障的情形,分析了采用P_Cycle(P圈)为故障链路提供保护的方法,以及在至少3边连通度格状网络中采用P圈实现双链路故障保护的配置策略。提出了一种基于网络工作资源分布和P圈有效跨接链路配置P圈的双链路故障保护启发式算法。使用OPNET软件搭建的ASON仿真平台,采用泛欧COST239网络拓扑和静态业务模型对算法性能进行了仿真。仿真结果证明了该方案在拥有环网快速恢复能力的同时,相比已有算法具有更低的资源冗余度。

关键词: MESH光网络, 双链路故障, 保护, P圈, 有效跨接链路

Abstract:

In optical networks with mesh topology, two links in the network may fault at the same time. The way to protect the dual failures with p_Cycles was analyzed, and the configuration strategy of p_Cycles in mesh networks with at least 3-degrees was then discussed. Furthermore, a heuristic algorithm based on the distributing of the working resource and the effective straddling links was proposed. And we simulated our proposed algorithm by OPNET Modeler in COST239 network under static traffic model. The simulation results show that our proposed algorithm has shorter restore time and lower capacity redundancy.

Key words: mesh optical network, dual link failure, protection, p_Cycle, effective stride link

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