光网络中基于SRLG通路保护的动态RWA算法

Dynamic path-protection RWA algorithms in optical network under SRLG constraints

基于共享风险链路组SRLG(shared risk link group)的通路保护策略是光网络中的一种重要的生存性机制,而合理的通路保护路由与波长分配RWA(routing and wavelength assignment)算法是实现该生存性机制的一个关键。研究了基于SRLG通路保护的动态RWA算法,包括专用通路保护和共享通路保护算法;使用了不同的选路和波长分配算法分别实现了基于这两种通路保护策略的RWA算法,并对其性能进行了计算机仿真,研究了不同路由和波长分配算法对通路保护算法性能的影响。从仿真结果可以看出:通过使用更好的选路和波长分配算法可以进一步提高基于SRLG通路保护的动态RWA算法的性能。

Shared risk link groups （SRLG） based path-protection mechanisms are very important survivable techniques in optical networks. In order to realize these mechanisms, effective routing and wavelength assignment （RWA） algrithms are needed. In this paper, two major kinds of SRLG-based pathprotection mechanisms were studied. The performances of these mechanisms using defferent RWA algorithms were analyzed and compared though computer simulation. The simulation results show that the performance of these two path-protection mechnisms can be improve when better RWA algorithms are used.