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An Energy-efficient Adaptive Cooperative Node Selection Scheme in WSN |
Zhang Yu①②; Cai Yue-ming①③; Pan Cheng-kang①; Xu You-yun① |
①Department of Radio Communication of Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China; ②The 63rd Research Institute of the PLA General Staff Headquarters, Nanjing 210007, China;
③National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China |
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Abstract An energy-efficient adaptive cooperative node selection scheme is proposed for energy-constrained wireless sensor networks. It determines the candidates of the Cooperative Node (CN) based on predetermined energy threshold, and then chooses the best node as the CN of Cluster Head Node (CHN) by considering the residual energy of the candidates as well as the channel state information. It can obtain the optimum energy threshold of different distances by minimizing the total energy consumption. Then the energy threshold is adaptively predetermined for minimizing the total energy consumption according to the distance between the CHN and the Data Fusion Center (DFC). The results of the theoretical analysis and simulation show that the proposed scheme can efficiently balance the transmission energy consumption and the circuit energy consumption so that it can efficiently reduce the total energy consumption, and can obtain the minimum of the total energy consumption.
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Received: 03 November 2008
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