Dynamic path shared protection for survivable differentiated reliable WDM optical networks

Authors:
Lei Guo;Lemin Li;Jin Cao;Hongfang Yu;Xuetao Wei
Affiliations:
College of Information Science and Engineering, Northeastern University, Shenyang, China;Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu, China;Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu, China;Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu, China;Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu, China
Venue:
ICDCN'06 Proceedings of the 8th international conference on Distributed Computing and Networking
Year:
2006

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Abstract

In 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.