Hybrid self-healing mechanism with VP priority and dynamic bandwidth assignment policy in ATM networks

Abstract

It is reasonable to restore the VP failures according to the VP priority level in respect of guaranteeing the QoS which is coupled with the VP priority. This paper proposes a new hybrid self-healing mechanism based on the VP priorities over the ATM networks. Backup VPs are assigned to restore the failures on the restoration domains such as the OAM segment or end-to-end VPC. Semi-dynamic VP restoration algorithms are used for the VPs which do not have backup VPs or whose backup VPs fail. The simulation results show that the proposed algorithm can restore higher priority VPs faster than the lower priority VPs.