WDM网基于混合共享和SRLG约束的通路保护

研究了网状波分复用（WDM）网中动态生存性路由配备问题，提出了一种新颖的基于共享风险链路组（SRLG）束的混合共享通路保护（MSPP）方案。MSPP为每个业务请求分配丁作通路和SRLG分离的保护通路，因此能完全保护单SRLG故障。与传统的共享通路保护（SPP）方案不同，在满足某些约束条件下，MSPP允许部分工作通路和保护通路共享资源。仿真结果表明，MSPP性能优于SPP。

A Path Protection Scheme in WDM Networks with Mixed Shared and SRLG Constraints

The dynamic survivable routing provisioning problem under shared risk link group(SRLG)constraints for dynamic connection requests in wavelength division multiplexing(WDM) networks is studied,and a novel protection scheme called mixed shared-path protection(MSPP)to tolerate the single SRLG failure is proposed.With MSPP,each connection will be assigned a primary path and a SRLG-disjoint backup path.Differing from previous shared-path protection(SPP)scheme,MSPP allows some primary and backup paths to share the common resources if the corresponding constraints can be satisfied.Simulation results show that MSPP yields better solutions than SPP.