Abstract

AbstractIn WDM optical networks, the fiber links may share some common physical resources (e.g., cables, conduits) and the consequence is that they have the Correlated Link Failure Probability (CLFP), which denotes the probability of link l failure after link f fails. Based on CLFP, we propose a new dynamic survivable algorithm, called Differentiated Path Shared Protection (DPSP), to protect the double-link failures in WDM optical networks. In DPSP, each connection request can be assigned one working path and additional backup paths according to the differentiated reliable requirements of users. Compared to previous work, DPSP can obtain better performances in resource utilization ratio and blocking probability.KeywordsWDM networksdifferentiated reliabilityCorrelated Link Failure Probability (CLFP)double-link failurespath shared protection

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