Research On Key Technologies Of MIPv6/PMIPv6 Based Mobility Support

With the development of Internet and wireless technologies, the all-IP based mobile Internet becomes a hot topic and the mobility management is one of the most important technologies to support the mobile Internet. As the most classic and mature technologies for the mobility management, MIPv6 (Mobile Internet Protocol version 6) and PMIPv6 (Proxy MIPv6) have been standardized and extended by the IETF. Based on the problems of the mobility management in the heterogeneous mobile Internet, this thesis studies some key technologies of MIPv6/PMIPv6 based mobility management using simulation, analysis and experimentation. The main contents and conclusions are listed as following.1. This thesis proposes MCoA (Multiple Care-of Address)-based mobility management scheme in the heterogeneous networks. This scheme mainly consists of the adaptive access network selection module, optimized handover triggering module and seamless vertical handover module. Analytical, simulated and experimental results show that this scheme can not only optimize the vertical handover, but also guarantee the usability of IPv6 based protocol in the IPv4 based networks.2. This thesis proposes and implements PMIPv6-based multi-interface supporting scheme. In the implementation, the binding update signaling messages of PMIPv6 are extended to carry more detailed information of the related interface. Some modules are added for the interface synchronization between the terminal and the network. Experimental and analytical results show that our scheme can well support the seamless handover between different interfaces and can be deployed in the overlay wireless network for efficient mobility management.3. In order to support the access and handover of mobile network in the PMIPv6 domain, this thesis proposes the "tunnel split" scheme. Simulation results show that this network mobility supporting scheme can reduce the handover latency and signaling cost significantly, and the packet loss can be reduced at the same time thanks to the delayed binding update scheme.4. This thesis proposes the hybrid MIPv6/PMIPv6 based mobility management architecture, aiming to take the advantages of both MIPv6 and PMIPv6 at the same time. Basically, the PMIPv6 and MIPv6 are used for the local mobility and global mobility separately in the Hybrid scheme. Besides, the Hybrid+ scheme considers the network conditions and mobility characteristics for the selection between basic MIPv6 and the Hybrid scheme. In order to avoid the additional latency caused by the protocol selection, the fast handover and pre-authentication schemes are adopted. The experimental results show that the Hybrid+ can support the global mobility of the terminal, and adaptively use the better scheme to support mobility.5. On the basis of an efficient and scalable locator/ID separation architecture, a mobility management mechanism is designed (Locator/ID Separation based mobility management protocol, LIDS). The performance analysis is presented for both horizontal and vertical handover scenarios. The results show that the LIDS provides an outstanding network-based mobility management with route optimization support compared with the IP based approaches (MIPv6 and PMIPv6).