WDM网络设计保护优化分析

The optimal analysis of design protection for WDM network

WDM网络的物理保护由于需要大量冗余光资源而难以实现,而设计保护利用了层次结构网络中业务网络的生存能力,可以恢复光层故障中断的业务。为了消除业务网络的虚链路关联效应,文章提出了虚链路与光链路映射的优化模型并使用模拟退火算法进行了求解,仿真结果表明设计保护提供的业务恢复能力远远高于普通的最短路由算法。

Physical protection is impractical owing to its large redundant optical resources in WDM networks. Design protection can restore the services interrupted by optical fault with the survival ability of service network in layered network. In order to eliminate the infection of virtual link relevancy this paper presents a optimal model for mapping virtual link to optical link and solves it effectively by using simulated annealing algorithm. Simulated results indicates that design protection can provide more restoration capability of service than that of the shortest-path routing-plain algorithm can provide.