基于P环的恢复机制在WDM网状网中的应用

目前波分复用(WDM)网状网中所采用的恢复机制的恢复速度较慢，不能满足某些业务的需求。利用空闲容量建立的p环(pmcmtfigured cycles)具有环形网的速度和网状网的容量效率。它的操作方法简单，使用灵活，可以应用于WDM网和IP网等不同的网络。本文详细介绍了p环的基本原理、构造过程及优化方法或讨论了多故障的情形，并对一些新的研究方向作了评述，可供网络设计者参考。

Applications of Restoration Mechanism Based on p-Cycles in WDM Mesh Networks

Restoration speed is so slow with current restoration mechanisms that it can not meet the needs of some services in WDM mesh networks, p-Cycles(preconfigured cycles)established with spare capacity can attain ring-like speed and mesh-like capacity efficiency. It can be applied to various networks such as WDM networks and IP networks with simple operations and flexible methods. This paper introduces its fundamental configuration process and optimization discusses the multi-failure case and evaluates some new viewpoints.