Dynamic survivable algorithm for meshed WDM optical networks

Authors:
Lei Guo;Hongfang Yu;Lemin Li
Affiliations:
Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu, PR China and College of Information Science and Engin ...;Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu, PR China;Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu, PR China
Venue:
Journal of Network and Computer Applications - Special issue: Network and information security: A computational intelligence approach
Year:
2007

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Abstract

In this paper, we propose a novel heuristic survivable algorithm called dynamic path-shared protection (DPSP) to completely protect the double-link failures in meshed Wavelength-division-multiplexing (WDM) optical networks. In order to improve the algorithm performance, we focus on considering two key issues that are load balancing and resource-sharing degree when computing the working and backup paths. We also investigate the trap situations and present a solution method, because the trap situations may lead to high blocking probability (BP). Simulations results show that, DPSP can provide complete protection for the double-link failures; with respect to the previous work, DPSP not only can effectively avoid the trap situations but also is able to obtain higher resource utilization ratio and lower BP.