WDM抗毁网中考虑链路故障相关性的双链路失效保护算法  

A Dual-Link Failure Protection Algorithm with Correlated Link Failure Probability for Survivable WDM Networks

作　　者：郭磊[1] 虞红芳[1] 李乐民[1] 

机构地区：[1]电子科技大学宽带光纤传输与通信网技术重点实验室,成都610054

出　　处：《电子与信息学报》2005年第9期1483-1487,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60302010)资助课题

摘　　要：光纤链路由于共享了相同的物理资源,因此具有一定的故障相关性。这种故障相关性可以用相关链路失效概率(Correlated Link Failure Probability,CLFP)来表示。在CLFP基础上,该文研究了WDM抗毁网中双链路失效问题,提出了一种新的支持用户区分可靠性(Differentiated Reliability,DiR)的共享通路保护算法:SPPDLF-DiR (Shared-Path Protection for Dual-Link Failures with DiR)。仿真表明,SPPDLF-DiR在满足用户区分可靠性要求的前提下,能有效地提高资源利用率和降低业务阻塞率。Because the fiber links share the common physical resources, they have the Correlated Link Failure Probability （CLFP）. Based on CLFP and Differentiated Reliability （DiR）, the dual-link failures problem has been studied, and a novel protection algorithm, which is called Shared-Path Protection for Dual-Link Failures with DiR （SPPDLF-DiR）, has been proposed for survivable WDM networks. Under dynamic traffic with different load, the performances of SPPDLF-DiR are simulated. The results show that SPPDLF-DiR not only can satisfy the specific requirements of users but also can effectively improve the resource utilization ratio and reduce the blocking ratio.

关 键 词：WDM抗毁网 双链路失效 相关链路失效概率 区分可靠性 

分 类 号：TN919.2[电子电信—通信与信息系统]