AODV Routing Protocol Study And Simulation Based On Stability

Mobile Ad Hoc network (MANET) is a multi-hop and temporary autonomous system，that is composed of a set of mobile nodes without fixed infrastructure support. Each node hasequal status, it not only is a communications terminal, but also a router for communicatingwith other nodes. Ad Hoc networks without central control node have many advantages, suchas flexible, building a network fast, and less investment.AODV protocol is a typical on-demand routing protocol for Ad Hoc network. In therouting discovery process, AODV protocol only considers the shortest path and the fastestresponse as routing measure. It does not take into account the node energy consumption, sothat a lot of routes turn to be failure, and the network service life is reduced.This paper introduces the research status and development prospects ofAd Hoc networks,and analyses several typical routing protocol of Ad Hoc network briefly. Then, the basicprinciple of AODV protocol is analyzed in detail. In view of the AODV routing protocolmaintaining only a single route and no taking into account the shortage of the node energyconsumption, the optimization idea of AODV is proposed. It takes into account the fastestresponse, shortest path, the backup path routing and node energy consumption. Then, thestandard AODV protocol is modified based on NS2platform, building a new protocol. Theperformance via simulation on the base of NS2shows that the optimized AODV routingprotocol is better than the original AODV in packet delivery ratio, end-to-end average delay,route discovery frequency and network survival time. The new protocol is more suitable forthe rapidly changing network topology. Optimized protocol uses backup routing mechanism,and it protects the low residual energy of nodes at the same time. Studies have shown that thistheory is correct and feasible, and it can effectively enhance the stability of the network.