| An mobile Ad Hoc network does not require a fixed network infrastructure. Since this kind of network features no center, wide coverage, anti-damage and so on, it can quickly build the network platform for military and civilian applications. Therefore, it is a key technology in future wireless communication networks. In hierarchical ad hoc networks, the routing table in each node is organized according to the network number for reducing routing overhead. When a node enter into other subnets, the corresponding route item fails.Aiming to this problem, a new routing algorithm is proposed by combining the mobile IP routing and specific host routing, First, node switching process that the gathered position information can be used to predict whether a node will leave its current subnet, enter a new one is described in detail; Second, the hierarchical mobile routing algorithm is described in detail, the gateway that mobile IP routing does not coincide with special host route according to local topology table establish a special host route to the new subnet gateway, ensure that the destination node for the optimal routing, reduce the larger time delay caused by routing circuitous and network overhead built by maintaining a special host route, and ensure the quality of the business service requirements; Finally, hierarchical mobile routing functions is introduced in detail in the realization process of the prototype software.First self-organization network prototype software implements the function, then by using OPNET simulation of different scale network scenarios and different network load evaluates the performance of the mobile node across subnet routing algorithms. The simulation results show that the proposed mobile support node routing algorithm can solve the problem of failure of mobile routing node, can reduce the packet loss rate in the process of switching and network overhead and packet transmission delay, and verified the proposed routing algorithm has good network performance. |
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