【作者】 郭磊； 虞红芳； 李乐民；

【Author】 Guo Lei, Yu Hongfang , Li LeminKey Lab of Broadband Optical Fiber Transmission and Communication Networks, UESTC, Chengdu, 610054

【机构】 电子科技大学宽带光纤传输与通信网技术重点实验室；

【摘要】 本文研究了WDM网状网中双链路失效问题,提出了一种共享子路径保护算法SSPP(sharedsub-path protection)。SSPP把每条业务请求的工作路由划分成若干条等长且互不重叠的子路径,并为每条子路径各选择两条共享风险链路组(SRLG)分离的保护路由。如果两条子路径满足SRLG分离,则它们的保护路由可以共享资源。仿真表明,SSPP能完全保护双链路失效,并且能在资源利用率(阻塞率)和保护切换时间之间进行性能折中。更多还原

【Abstract】 We propose a shared sub-path protection algorithm (SSPP) to completely protect double-link failures in WDM mesh networks. SSPP segments the primary path into several equal-length and un-overlapping sub-paths and searches two SRLG-disjoint backup paths for each sub-path. If two sub-paths are SRLG-disjoint, then their backup paths can share common resources. The simulation results show that SSPP not only can completely protect double-link failures but also can make the tradeoffs between resource utilization ratio (or blocking ratio) and protection-switching time更多还原