格状光网络中基于非对称业务的P圈配置策略

针对格状光网络中的不对称动态业务,提出了一种实现单链路故障保护的保护圈配置策略. 建立了非对称环境下的P圈配置的网络模型，给出了一种基于网络中工作资源分布结构和P圈有效跨接链路效率配置保护圈的针对单链路故障的启发式P圈保护算法. 针对在非对称业务环境下动态业务给出P圈构建模型配置方法，采用泛欧COST239网络拓扑，在非对称动态业务环境下对算法性能分别进行了仿真. 仿真结果表明，该算法在非对称动态业务的环境下，比已有方法有更高的资源利用率. 分别针对网络轻载和重载的情况给出了不同优化P圈的配置方案.

A Novel P-Cycle Protection Strategy for Asymmetric Traffics in Mesh Optical Networks

A new P-cycle algorithm was proposed to improve the protection success ratio for asymmetric traffics in mesh optical networks. The proposed algorithm was simulated in Pan-European COST239 network environment under asymmetric dynamic traffic model. The experiment shows that the proposed algorithm has lower capacity redundancy and higher utilization rate of configured resources than that of traditional P-cycle methods. The network performance can be significantly improved when this algorithm is implemented under single-link failure circumstances. The system behavior is analyzed under different traffic volumes, and the configuration strategy is also investigated for the heavy-load and light-loads network respectively.