IP/MPLSover WDM网中基于共享风险链路组限制的共享通路保护算法

A Shared Path-Protection Algorithm in IP/MPLS over WDM Networks Under Shared-Risk-Link-Groups Constraints

本文研究了IP/MPLSoverWDM网中 ,如何建立两条共享风险链路组 (SRLG)分离的标记交换路径 (LSP)问题 ,提出一种新的基于SRLG分离的共享通路保护算法 .该算法既可以保证用户业务的可靠性要求 ,同时又能够有效提高全网的资源利用率 ,从而大大降低全网LSP建立请求的阻塞率 .本文还对所提算法进行了仿真研究 ,并给出了仿真结果 .

Different Shared Risk Link Groups(SRLG)identifiers can be assigned to each link by network administrator in optical Traffic Engineering(TE)with GMPLS to satisfy connection's reliability requirement.A dependable connection can be achieved by establishing two SRLG disjoint paths.A new routing algorithm for shared path protection based on SRLG disjoint is presented in this paper.It provides the same level of protection against single SRLG failure as dedicated path protection scheme.Moreover it is superior to dedicated path protection scheme in network utilization.Network performance, based on dynamic traffic with different load,is investigated via simulations.The results show that the scheme can improve the performance of the network significantly.