Evaluation of Protection Reconfiguration for Multiple Failures in Optical Networks

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Executive Summary

Protection and restoration are important in designing reliable optical networks and have been widely studied in the literature. Most practical studies of high-speed recovery algorithms assume only a single-link or single-node failure model. As networks grow in size and complexity, both the likelihood and the impact of failures increase. In order to guarantee that a failure in one part of a network does not affect the entire global network's ability to recover from subsequent failures, people must understand the impact of multiple failures and provide efficient solutions. Restoration does not require reconfiguration because it dynamically finds backup paths after a failure and therefore is not considered.

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