In order to avoid inaccuracies in the pre-configured P-cycle protection resource allocation arising from the variations of the traffic distribution in WDM networks

a reconfigured P-cycle concept is proposed and a reconfigured P-cycle model based on network performance parameters set up.A simulation platform is constructed in OPNET to verify its efficiency on the basis of Pan-European COST239 network topology.Simulation results show that re-computing the optimized P-cycle according to the network variation can reduce the network performance jittering and improve the utilization rate of the protection resource.