Study on Energy Conservation in MANET

Battery energy is a rare resource in MANET and it often affects the communication activities in network. In this paper, we first present an energy management model, in which each node can transfer its state between power-save mode and active mode. Based on such model, we propose a routing protocol for further energy control. In the protocol, a new routing function dealt with both MAC layer and network layer is defined. It can dynamically adjust transmission power of nodes for per-hop energy saving and, also consider the residual energy of node for balancing traffic load to achieve overall energy efficiency. Among the feasible paths, the one with the maximal value of joint function will be chosen as the optimal route for data transportation. Simulation results show that such protocol can remarkably increase the life-span of network with lower energy consumption when compared to the routing scheme according to the shortest path and without energy control mode.