抗毁网状WDM网络中的光纤级P-Cycles优化设计  

Fiber-Level P-Cycles Optimal Design for Survivable Mesh WDM Networks

作　　者：虞红芳[1] 吴冬凌[1] 李乐民[1] 林然[2] 陈天罡[2] 

机构地区：[1]电子科技大学宽带光纤传输与通信网技术教育部重点实验室,成都610054 [2]中国网络通信集团公司四川省分公司,成都610041

出　　处：《电子科技大学学报》2007年第2期161-163,216,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金资助项目(60302010);国家973资助项目(2007CB307104)

摘　　要：为降低保护切换代价和提高故障恢复时间,提出了以光纤级P-Cycle来实现网络保护;研究了工作路由与光纤级P-Cycle放置联合优化的设计问题,给出了ILP数学模型。为降低计算的复杂度,采用了一种简单有效的方法:根据跳数预先选择工作路由候选集及环的有效性和长度预先选择P-Cycle候选集。仿真结果表明光纤级P-Cycle设计相比于波长级P-Cycle设计保护切换代价大大降低。To reduce the protection-switching cost and failure recovery time, the fiber-level P-Cycles is presented to realize network protection. The issue about the joint optimization design of the working path routes with fiber-level P-Cycle placement is further studied; and an improved ILP formulation is developed. To reduce the complexity of joint optimization problem, the simple process of pre-selecting candidate P-Cycles by the efficiency and length metric and candidate working path routes by the hop metric is used. By simulation analysis, the fiber-level P-Cycles scheme efficiently decreases the switching cost compared with the wavelength-level P-Cycles.

关 键 词：光纤级P-Cycle 联合优化 预先选择 保护切换代价 

分 类 号：TN913.24[电子电信—通信与信息系统]