Research On Distributed Mobile IP Management Of Vehicle Online Communication

Current IP address not only represents location identifier but also represents the identity causing semantics overload problem, which is not conducive to the mobility of the terminal and network scalability in the future. ID/Locator Separation Network is one of signification direction to solve the future network problem in that terminal node can remain the identity unchanged during moving, which can naturally support mobility. Consequently, ID/Locator SN architecture can well solve the handover problem caused by the high-speed moving vehicles. Under ID/Locator SN system, discussing mobility management mechanism of vehicle online communication needs to solve two key problems, how to build an efficient mapping system to reduce analytical delay and how to propose a effective mobility management mechanism to reduce handover delay caused by vehicle during the move.Aiming at mapping system problem, in this thesis, based on the research on mapping system of LISP, LISP – DHT, this thesis proposes a hierarchical, distributed, HD-MS, mapping system architecture. First of all, when configuring IP address for vehicles, a regional identification is introduced into the header of the IP, and nodes in the same area are configured with the same IP address prefix. Then according to area, this thesis changes the deployment way of LISP-DHT, which is flat, into a hierarchical, distributed way, building One Hop+Mchord double mapping system. TMS as a top global mapping system uses One Hop algorithm due to structure stability and the RMS as the underlying mapping system located in different areas, which needs high scalability requirements, uses the improved chord algorithm. Hierarchical and distributed deployment way effectively reduces the number of nodes server query. Finally, the theoretical and simulation analysis was carried out on the HD-MS, the results showing that the average query delay and average search path length excels LISP- DHT.Aiming at mobility management problem, on the basis of building HD-MS, this thesis proposes a kind of effective mobility management scheme. According to road conditions on the edge of access networks, the thesis brings in grading registration mechanism, reducing the location map update delay and overhead. What’s more, each terminal node is allocated an AP used to register mapping relationship, which is introduced in this paper, standing for the proxy router of a terminal node. When mobile in the same domain, terminal node remain this AP unchanged, only mobile between different domains does terminal node update its mapping relationship EID-to-RLOC, which consequently reduce the dependency on mapping system for vehicle node. In order to analyze the performance of the proposed scheme, this paper has made the analysis on the performance of handover delay and transmission overhead from the perspective of mathematical modeling. Analysis results show that the proposed scheme can effectively reduce the handover delay, and at the same time has a good performance in low overhead transmission.