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In this paper we propose a new framework for computing an efficient set of p-cycles which can lead to superior performance in terms of capacity utilization in network protection. We first propose an algorithm for finding all fundamental cycles. Then, the set of candidate p-cycles is constructed by merging fundamental cycles. The number of proposed candidate p-cycles is small but they can construct...
Shared link and shared path protections have been recognized as preferred schemes to protect traffic flows against network failures. In recent years, another method referred to as shared segment protection has been studied as an alternative solution for protection. This method is more flexible and efficient in terms of capacity utilization and restoration time. However, to our best knowledge, this...
p-cycle is a type of shared link protection for survivable wavelength-division multiplexing (WDM) mesh networks. p-cycle not only retains ring-like restoration speeds, but also achieves capacity efficiency in mesh networks. However, finding the optimal set of p-cycles to protect all traffic demands within a reasonable response time is difficult. This is particularity true with dense meshes or large...
In this paper, we propose a heuristic approach for finding optimal protection cycles in wavelength-division multiplexing (WDM) mesh networks. To guarantee optimality, all cycles are considered as candidates in our study. When the working capacity is known, our first step is to create all cycles using the span-based cycles (SBC) algorithm. Then the heuristic cycle efficiency selection (HCES) algorithm...
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