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。
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.