Efficient shared-path protection exploiting the knowledge of connection-holding time

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Abstract
We propose to exploit the knowledge of connection-holding time to design an efficient algorithm, called PHOTO, for dynamic provisioning of shared-path-protected connections in optical mesh networks. The core idea of our proposal consists of exploiting the knowledge of the holding time of connection requests to minimize resource overbuild due to backup capacity and hence achieve resource-usage efficiency. For a typical US nationwide network, we obtained savings on resource overbuild ranging from about 4% to 10% for various scenarios, compared to a holding-time-unaware, but otherwise shared-path-efficient, approach.

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