A resource efficient common protection path approach for MPLS-based recovery

MPLS-Traffic Engineering (MPLS-TE) provides many recovery mechanisms such as rerouting and protection. Existing one-to-one backup and path-based backup schemes are not resource efficient. We propose Common Protection Path (CPP), a novel protection scheme which selects a common protection path for traffic demands having the same ingress and egress routers. CPP also factors in path failure probability and restoration priority levels of the traffic demands. Simulation results show that the protection bandwidth reservation required for one-to-one backup scheme is 1.85 to 4.43 times that of CPP scheme and for dedicated path-based scheme it is 1.10 to 1.78 times that of CPP scheme.