Power control in wireless sensor network based on nearest-neighbor algorithm
Zhen Hong · Journal of Zhejiang University(Engineering Science) · 2010
A single and unchanged transmission power can not meet the requirement of energy efficiency in wireless sensor network because the nodes deployment of wireless sensor network was dense and random.The power control in wireless sensor network based on various nearest-neighbor distances algorithm(NNPC)was proposed in order to solve the problem.Sink node saved the entire network topology information.The node density was measured with various nearest-neighbor distances algorithm,and the optimal communication range was determined.Then the optimal transmission power was calculated with the Friss free space model and the two way propagation model.Finally Sink node broadcasted to inform nodes transmitting data with the optimal transmission power.If nodes didn't receive the broadcast packet,the nodes used the default maximum transmission power.Simulation results show that the algorithm can improve the network lifetime and save the network average energy consumption.