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Optical Engineering

Heuristic of differentiated path-shared protection for dual failures in restorable optical networks
Author(s): Lei Guo; Lemin Li; Hongfang Yu; Jin Cao
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Paper Abstract

In wavelength-division-multiplexing optical networks, the fiber links may share some common physical resources (e.g., cables, conduits), and the consequence is that they have a correlated link failure probability (CLFP), which means that the probability that link l will fail depends on whether link f has failed. Based on CLFP, we propose a new heuristic survivable algorithm, called differentiated path-shared protection (DPSP), to protect against 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 reliability requirements of users. Compared to previous work, DPSP can obtain better performances in resource utilization ratio and blocking probability.

Paper Details

Date Published: 1 February 2007
PDF: 7 pages
Opt. Eng. 46(2) 025009 doi: 10.1117/1.2538437
Published in: Optical Engineering Volume 46, Issue 2
Show Author Affiliations
Lei Guo, Northeastern Univ. (China)
Lemin Li, Univ. of Electronic Science and Technology of China (China)
Hongfang Yu, Univ. of Electronic Science and Technology of China (China)
Jin Cao, Univ. of Electronic Science and Technology of China (China)

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