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This paper introduces the problem of the best choice among M combinations of the shortest paths for dynamic provisioning of light-paths in all-optical networks. To solve this problem in an optimized way (shortest path and load balance), a new fixed routing algorithm, named Best among the Shortest Routes (BSR), is proposed. The BSR's performance is compared in terms of blocking probability and network utilization with Dijkstra's shortest path algorithm and others algorithms proposed in the literature. The evaluated scenarios include several representative topologies for all-optical networking and different wavelength conversion architectures. For all studied scenarios, BSR achieved superior performance.
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