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A fault recovery system that is fast and reliable is essential in survivability design in wavelength-division-multiplexing (WDM) mesh networks. Pre-configuration cycle (p-cycle) benefits both the fast recovery time and the efficient resource utilization. Finding good candidate p-cycles is the first and very important step in p-cycle design. The node-encircling p-cycle can protect not only the on-cycle...
In this paper, we investigate the protection design for survivable meshed WDM optical networks, and propose a novel heuristic algorithm, which is called segment shared protection (SSP), to completely protect the dual-link failures. For each connection request, first SSP computes a least-cost working path, second SSP divides the working path into several un-overlapped segment paths according to a parameter...
In this paper, we investigate the protection design under shared risk link group constraints in survivable wavelength-division-multiplexing mesh networks, and present a new shared-path protection algorithm, called solution approach with backtracking (SAB). Differing from other shared-path protection algorithms, which are called two-step approach (TSA), SAB not only can solve the trap problem but also...
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