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On Finding Feasible Solutions With Shared Backup Resources for Surviving Double-Link Failures in Path-Protected WDM Mesh Networks

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5 Author(s)
Lei Guo ; Coll. of Inf. Sci. & Eng., Northeastern Univ., Shenyang ; Lemin Li ; Jin Cao ; Hongfang Yu
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In this paper, we investigate the problem of dynamic survivable routing in wavelength-division-multiplexing optical networks and propose a new path-protection algorithm called Enhanced Shared Backup Paths Protection (ESBPP) to provide the complete survivability for double-link failures. In order to improve the resource-utilization ratio, we present the new rule of sharing backup resources that can yield better resource-utilization ratio than previous methods. In order to overcome the problem of trap paths, we develop a new routing method to find the feasible solution with three link-disjoint paths for each connection request. Compared to previous algorithms for double-link failures, ESBPP can obtain higher resource-utilization ratio and lower blocking probability

Published in:

Lightwave Technology, Journal of  (Volume:25 ,  Issue: 1 )

Date of Publication:

Jan. 2007

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