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| A Dual-Link Failure Protection Algorithm with Correlated Link Failure Probability for Survivable WDM Networks |
| Guo Lei;Yu GongFang;Li LeMin |
| Key Lab of Broadband Optical Fiber Transmission and Communication Networks,VEST of China,Chengdu 610054,China |
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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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Received: 21 April 2004
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2005, Vol. 27 
