INTER-DOMAIN HANDOVER SCHEME WITH OPTIMAL ROUTE RECOVERY FOR PROXY MOBILE IPV6 PROTOCOL

Proxy Mobile IPv6 (PMIPv6) protocol was standardized to solve the problems associated with MIPv6 protocol including the long handoff latency, packet loss and signalling overhead by excluding the mobile node (MN) from taking part in the mobility process. However, PMIPv6 provides mobility support for MNs moving inside a single domain. Therefore, whenever MN crosses the boundary of its domain, it cannot be reached and the current session is broken down. Several research works have addressed the inter-domain mobility problem for PMIPv6; however, the current proactive handoff methods have reported a high signalling cost due to the redundant multicast messages. In addition, the recovery of the current optimized communication route for the moving MNs has not been considered. Thus, in this paper, a global mobility management scheme, named GRO-PMIPv6, is proposed to provide an effective mechanism to support seamless and fast MN inter-domain handover while maintaining the current optimized communication route for the moving hosts. An analytical model is designed to evaluate and compare the performance of the proposed scheme with the state-of-the art schemes. The numerical results show that the proposed scheme outperforms the current mobility schemes in terms of low handoff signalling cost.