格状波分复用网络中的跨域段保护机制

为了提高网络的生存性,提出一种适用于大规模多域光网络的跨域段保护机制。该机制改进现有“按域分段,域内保护”的段保护方案,将保护通道跨接在受保护域的前后邻域的边界节点上,使得工作通道中相邻的段之间互相重叠,从而实现对域边界节点和域间链路的完全保护,克服了现有方案中要求网络相邻域之间共享边界节点的限制。分析这种新机制的信令过程以及相关性能参数,通过仿真计算与一般的通道保护机制进行了比较。结果表明,跨域段保护机制具有更快的保护倒换速度和较好的资源利用率。

Domain-spanning segment protection in WDM mesh networks

In a large optical network with multiple domains,protection of the domain border nodes and the inter-domain links is an important issue affecting network survivability.Some existing segment protection models force adjacent domains to share border nodes,which greatly weakens the network's flexibility.This paper describes a domain-spanning segment protection method,which sets up a protection path between border nodes of the domains before and after the protected domain.The signaling process and performance of this mechanism are analyzed in detail.Simulations show that the method provides complete protection for the working path with good resource efficiency and protection speed.