WDM抗毁网中考虑链路故障相关性的双链路失效保护算法

郭磊; 虞红芳; 李乐民

WDM抗毁网中考虑链路故障相关性的双链路失效保护算法

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出版历程
- 收稿日期: 2004-04-21
- 修回日期: 2004-11-15
- 刊出日期: 2005-09-19

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

摘要

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 Protectionfor 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.
- WDM抗毁网; 双链路失效; 相关链路失效概率; 区分可靠性
Abstract: 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.

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