Methods for protection and restoration from large-scale failures in telecommunicaton infrastructure

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The explosive growth of communication demands in recent years has attracted special attention to the issue of reliability of telecommunications infrastructure and backbone networks. The importance of large-scale failure problems in communication networks cannot be overstated. Such failures could paralyze the backbone networks and completely disrupt essential network-based voice and data services across the country. Fast and cost-efficient recovery of communication service is essential in today's world. A number of different options for network restoration exist, including local (link-based) restoration or end-to-end (path-based) protection, using shared or dedicated capacity, offering different restoration times and redundancy costs.