Study on Cooperative Nodes Deployment based on Energy Efficiency

Energy consumption in wireless communication includes amplifier energy consumption and circuit energy consumption. In long-distance communications, amplifier energy consumption is a great major of energy consumption, so circuit energy consumption is usually omitted. However, in short-distance communications, circuit energy consumption may exceed amplifier energy consumption and even become the majority of sum energy consumption. So, how to exploit the advantage of cooperative diversity in wireless communication becomes a crucial problem. In this paper, we try to solve the problem of cooperative nodes deployment in wireless communication networks. We include the distance between source node and cooperative nodes cluster into cooperative communication system model and propose a strategy to optimize sum energy consumption according to modulation parameter, the number of cooperative nodes and the distance between source node and cooperative nodes cluster. Simulation results in wireless sensor network show that the optimized cooperative nodes deployment can greatly improve the cooperation and save more energy.