为了解决波分复用(WDM)网络中由于流量分布变化而导致网络中预配置P圈保护资源分配不准确的问题, 提出了可重构P圈的概念, 并建立了一种基于网络性能参数进行重新配置的P圈模型。在OPNET中搭建仿真平台, 基于泛欧COST239网络拓扑结构, 对提出的模型进行了验证。仿真结果表明, 根据网络的变化重新计算优选P圈, 可以降低网络的性能抖动, 提高网络的保护资源利用率。

In order to avoid inaccuracies in the pre-configured P-cycle protection resource allocation arising from the variations of the traffic distribution in WDM networks, a reconfigured P-cycle concept is proposed and a reconfigured P-cycle model based on network performance parameters set up. A simulation platform is constructed in OPNET to verify its efficiency on the basis of Pan-European COST239 network topology. Simulation results show that re-computing the optimized P-cycle according to the network variation can reduce the network performance jittering and improve the utilization rate of the protection resource.