A scheduling mechanism for service aware restoration of MPLS networks

This paper presents a restoration technique for recovering the label-switched paths (LSPs) in MPLS networks, where a variety of services with heterogeneous QoS requirements are supported. A scheduling mechanism is designed for sending the failure notification messages of various priority LSPs. It ensures better routes and preferential resource access for the higher priority LSPs, and achieves acceptable recovery time for lower priority LSPs at the same time. Simulation results show that the proposed scheduling mechanism achieves significant performance improvement in terms of the LSP restoration time. Our approach is feasible for the restoration of the MPLS networks and any other connection-oriented packet networks