Study On IP Protocols In Mobile Ad Hoc Network

Mobile ad hoc network (MANET) is a kind of wireless network architecture that becomes more popular. Mobile IP has been applied to support IP mobility in wireless Internet to keep a session connected when a mobile host roams from one subnet to another. A novel scheme integrating Mobile IP with Ad Hoc networks is proposed. At the same time a new method for IP address auto-allocation is presented. This paper is organized as follows:1. A novel management scheme is presented to improve the location and hand-off performance of nodes in the network. The main idea is to build a hierarchical structure in each Ad hoc network. Some mobile terminals are selected as sub-agent for AP to make contribution to network management. The location management in the scheme brings much convenience for routing discovery. Also, the method supports soft handoff efficiently combining with lower-layer routing technology. We use OPNET Modeler to simulate performance improvements about managing data costs and switch delay with different schemes. The result is that our scheme outperforms traditional MIP protocol significantly. Finally, the implementation of hierarchical Mobile IP scheme is presented.2. Then an address assignment project for the automatic configuration is proposed on the basis of the hierarchical Mobile IP scheme. Sub-agents are used to configure new nodes in turn. IP address reclaiming method is also presented which aim at solving IP address leaks. Finally detailed flow charts are given to realize the scheme. We show that our solution is scalable and does not have the limitations of earlier approaches.