Shared backup tree protection in MPλS networks

Multi-Protocol Lambda Switching (MPλS) has been recently applied in the optical network control plane to provide fast lightpath provisioning. Shared backup tree lightpath protection is a promising paradigm in an MPλS network because of its fast recovery from single failure and its efficiency in terms of consumed capacity. We propose a heuristic that yields an efficient placement of working paths and backup trees in polynomial time. The experimental results show that the heuristic can save more than 15% capacity resources compared to dedicated path protection in existing optical wide area network topologies.