Optimal Dedicated Protection Approach to Shared Risk Link Group Failures Using Network Coding

Survivable routing serves as a key role in connection-oriented communication networks for achieving desired service availability for each connection. This is particularly critical for the success of all-optical mesh networks where each light-path carries a huge amount of data. Currently, 1 + 1 dedicated path protection appears to be the most widely deployed network resilience mechanism because it offers instantaneous recovery from network failures. However, 1 + 1 protection consumes almost twice as much capacity as required, which imposes a stringent constraint on network resource utilization.