Research Of Energy-saving Routing Algorithm For Ad Hoc Network

Mobile Ad Hoc network is distributed, self-organized, self-allocated and self-managed whose communication doesn't need the support of fixed facilities, therefore, it is widely and rapidly used during recent years in occasions which is out of the supports of wired network or temporary communications, such as war preparation, rescue and relief work, and other emergencies. However, as the electricity of the nodes in the network is generally supplied by the power-limited battery whose capacity is hardly increased substantially in a short time, the issue of energy-saving in the Ad Hoc network is of great significance.At present the issue of energy-saving in the Ad Hoc network focuses on the realization of the control of energy-saving on the rout protocols. This paper first introduces several typical network routing protocols of the Ad Hoc, and then gives a brief summarization to a number of routing protocols based on energy in the current Ad Hoc network, analyzes their advantages and disadvantages and indicates future research directions. On this basis, this paper proposes a new energy-saving routing algorithm so as not to damage other performances of the network while extending the survival time of the Ad Hoc Network. The new algorithm is mainly carried out by constructing a new routing cost function which employs two parameters of the routing, namely count of the hops and energy. In the new algorithm the energy parameters of routing is interpreted as the shortest survival time of node formed by the routing and the weights of these two parameters in the cost function are determined by the weighted factor. The weighted factor changes according to the nodes' energy in the network so as to achieve the purpose of adopting different routing strategies in accordance to different situations of the network. Finally it imports this new algorithm into DSR protocol, proposes a new energy-saving routing protocol ES-DSR (Energy-Saving DSR) for the Ad Hoc network, and through conducting several experiments by the network simulation tool of NS2, it validates the new protocol, compared with the original DSR protocol, may improve the survival time of network as well as other performance.