The Handover Policy And Real-time Study Based On MIPv6

In today’s era, the technology of mobile Internet and wireless communication develop rapidly. Meanwhile a sharp increase in the number of intelligent terminal equipment is also worthy of note. How can access network anytime, anywhere and realize the wireless communication in its true sense have become one of the most urgent tasks at present. Mobile IP is the key to realize the seamless communication, it main have two versions at current: Mobile IPv4 and Mobile IPv6. As we know, IPv4 has been gradually phased out due to the limitations of itself. So IPv6 will certainly replace IPv4 and become the new Internet protocol.Mobile IPv6 is a host-based mobility management protocol, but its handover delay is long and it has high packet loss rate. This paper proposes an improved algorithm called ERD-MIPv6 on the basis of RD-MIPv6 which is based on forecast and priority cache. ERD-MIPv6 in L2 predicts the handover will occur and perform local registration process in advance, thereby reducing the handover delay. MIPv6 requires the host to participate in handover, and this brings a certain burden to the mobile terminal. Therefore IETF proposes a proxy mobile IPv6 which based on network. PMIPv6 doesn’t need mobile terminal to participate in handover, but uses the newly introduced mobility management entity: LMA and MAG to complete the handover process. Aim at the problem that "reactive" model in FPMIPv6 has high packet loss rate, this paper introduces an algorithm called E-FPMIPv6 which based on LMA cache. The algorithm brings in priority list P_LIST on LMA to buffering data packets which is sent to MN, and this measure minimizes the impact of handover on communication.PMIPv6 is a local mobility management protocol and MIPv6 is a global mobility management protocol. To achieve global seamless handover, PMIPv6 and MIPv6 need to work together. Thus, this article raises an algorithm which is called E-IBPM in the fifth chapter to realize the interworking between ERD-MIPv6 domain and E-FPMIPv6 domain. In the last of the article, a simulation platform is established in NS2 and the improved algorithms will compare with standard protocols on it. The simulation result shows that the performance of the improved algorithm is more superior in terms of the handover delay and packet loss rate has improved significantly.