网状WDM网中的混合共享通路保护方案

A Novel Scheme with Mixed Shared-Path Protection for Meshed WDM Networks

研究了网状WDM网中的保护设计问题,针对单根光纤链路失效提出了一种新颖的混合共享通路保护方案(MSPPS)。与以前的共享通路保护方案(SPPS)不同,MSPPS方案不仅考虑了不同业务请求的保护通路之间的重叠关系,而且考虑了不同业务请求的工作通路之间的重叠关系,在满足相应约束条件时,MSPPS方案允许部分业务请求的工作通路和其他业务请求的保护通路之间共享波长资源。仿真结果表明,MSPPS方案的资源利用率和阻塞率性能均优于以前的SPPS方案。

This paper studies the protection problem in meshed WDM networks.A novel Mixed Shared-Path Protection Scheme(MSPPS)is proposed to survive the single-fiber-link failure.Differing from the previous Shared-Path Protection Scheme(SPPS),MSPPS considers the overlapping relationships between primary and backup paths and it allows some primary paths and backup paths of other primary paths to share the common wavelength resources if the corresponding constraints caa be satisfied.Simulation results show that MSPPS outperforms the previous SPPS in the performance of resource utilization ratio and blocking probability.