Routing Protocol Based On Qos In Mobile Ad Hoc Networks

A mobile Ad Hoc network (MANET) is a multiple hops wireless mobile communication network, which is composed of a set of mobile nodes with wireless transceiver device. It is temporarily established without any base station or infrastructure support. Mobile wireless sensor network is a kind of special applications in MANET. Not only its topology is frequently changed, but also the energy of the sensor node is limited.The thesis designs a bandwidth-satisfied energy-saving QoS routing protocol based on AOMDV (BEQoS-AOMDV) in order to reduce energy consumption and guarantee the QoS demand in mobile wireless sensor networks by studying the existing routing protocols. The protocol can weight node energy information and the cache information of the packet queue length to form a new comprehensive cost function. BEQoS-AOMDV considers the cost function, the residual energy and the available bandwidth of the node as a general criterion on route selection. Using caching and timing techniques, the RREQ packets are cached to the destination. When the timer is expired, it builds multiple paths on the given criterion on the route selection. The performance of BEQoS-AOMDV is compared with AOMDV by NS2. It is shown that BEQoS-AOMDV not only can extend the network lifetime, but also reduce the end-to-end delay and improve the probability of successful data transmission when the load is heavy in the network.