The Research of Mobile IPv6 Optimized Hierarchical Mobile Routing Protocol

Mobile IPv6 was the IETF proposition to support host mobility in the Internet. However, MIPv6 only defines means of managing global (macro)-mobility but does not address micro-mobility separately. This involves long handover delay and signaling load. To solve this problem, the Hierarchical Mobile IPv6 (HMIPv6) protocol has been proposed by splitting the handover management into inter-domain mobility and intra-domain mobility schemes. HMIPv6 remedied the deficiency of mobile IPv6 protocol, reduced the delay and the amount of signaling during handover compared with the basic MIPv6. But duplicate address detection and the transmission time for the handover operation in HMIPv6 could cause high handover delay. So HMIPv6 still cannot meet the requirement for traffic that is delay sensitive, such as voice. Through the analysis of HMIPv6, a kind of optimized managing models of mobile IPv6 routing on the basis of hierarchical mechanisms was proposed. By NS-2 simulation, we present and analyze the performance testing for our proposal by comparing it with the basic MIPv6.The results of simulation show that our scheme can give better handover performance than the traditional MIPv6, and the routing optimization was realized.