Abstract: Mobile IPv6(MIPv6) is a host based protocol,while Proxy Mobile IPv6(PMIPv6) is a network based proto col. The interactions between PMIPv6 and MIPv6 should be considered. Several proposed scenarios belong to hard handoff and cause long handover latency. An optimized scenario--Fast Handover for Interaction with MIPv6 and PMIPv6(FHIMP) was proposed. Comparison of the handover latency of the optimized procedure with the predecessor and the analytic result shows that the optimized procedures have an advantage in network performance.

Key words: Mobile IPv6 , Proxy mobile IPv6，Interaction with MIPv6 and PMIPv6 , Fast handover