研究了WDM網(wǎng)中雙故障導(dǎo)致的多鏈路失效問題，提出了一種共享子通路保護算法。共享子通路保護為每條業(yè)務(wù)請求計算一條最短的工作路由，并為工作路由上每段子通路各計算兩條共享風(fēng)險鏈路組分離且代價最小的保護路由。仿真表明，共享子通路保護不僅能有效地保護雙故障導(dǎo)致的多鏈路失效，而且能在資源利用率(阻塞率)和保護切換時間之間進行性能折衷。

In this paper, we propose a shared sub-path protection (SSPP) algorithm for protecting the multi-link failures of the dual-risk breakdowns in WDM mesh networks. SSPP firstly computes a minimum hop primary path for each connection request, and it follows to compute two SRLG disjoint and minimum cost backup paths for each sub-path on the primary path. The simulation results show that SSPP not only can completely protect the multi-link failures of the dual-risk breakdowns but also can make the tradeoffs between the resource utilization ratio (or blocking ratio) and the protection-switching time.