双链路故障时的共享路径保护  

Shared Path Protection against Double-Link Failures

作　　者：陈春风[1] 范戈[1] 

机构地区：[1]上海交通大学"区域光纤通信网与新型光通信系统"国家重点实验室,上海200240

出　　处：《光纤与电缆及其应用技术》2007年第6期33-36,共4页Optical Fiber & Electric Cable and Their Applications

基　　金：华为基金资助项目(YBTR2005011)

摘　　要：在波长路由光网络中,网络的存活性已经受到越来越多的重视。对单链路故障时的保护已经不能满足某些关键性业务对网络存活性的要求,因而研究了双链路故障时的共享路径保护技术。在动态业务下,将共享路径保护问题归结为整数线性规划。在节点无波长转换能力的情况下,分别提出了为当前业务计算最优路径和固定路径两种策略下的整数线性规划。数值结果表明,相对于专用保护,双链路故障时的共享路径保护能够节约30%左右的波长链路资源。In wavelength-routed optical networks, network survivability has received more and more attention. The recovery from single-link failures is no more able to meet the requirement of some critical services on network survivability. Consequently, shared path protection against double-link failures is studied. Under dynamic traffic, shared path protection is reduced to integer linear programming. In the optical networks without wavelength convertibility, integer linear programming for two strategies, i.e. optimal routing and fixed routing, for the current trattqc is proposed. The numerical results show that the shared path protection against double-link failures could achieve a saving of about 30% of the wavelength-link resources, compared with the dedicated protection.

关 键 词：波长路由光网络 共享保护 专用保护 整数线性规划 

分 类 号：TN929.1[电子电信—通信与信息系统]