格状光网络中基于非对称业务的P圈配置策略  

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

作　　者：李彬[1] 臧云华[1] 邓宇[1] 黄善国[1] 顾畹仪[1] 

机构地区：[1]北京邮电大学光通信与光波技术教育部重点实验室,北京100876

出　　处：《北京邮电大学学报》2008年第1期1-4,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家"863计划"项目(2006AA01Z246);教育部新世纪优秀人才支持计划项目(NCET-05-0112);北京邮电大学和台湾元智大学合作研究项目

摘　　要：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.针对非对称业务环境下的动态业务给出了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进行了仿真.仿真结果表明,该算法在非对称动态业务环境下,比已有方法有更高的资源利用率.针对网络轻载和重载的情况分别给出了不同优化P圈的配置方案.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.

关 键 词：格状光网络 P圈 生存性 保护 

分 类 号：TN929.11[电子电信—通信与信息系统]