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Research on Incremental Cooperation Transmission and Its Energy Efficiency in Wireless Sensor Networks |
Wang Shao-qing; Nie Jing-nan |
Institute of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China |
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Abstract The scheme of incremental cooperation transmission and its energy efficiency in wireless sensor networks are studied in this paper. Two important issues including ‘when to cooperate’ and ‘performance of cooperation’ are also solved. The expressions of energy efficiency of direct and cooperative transmission are deduced respectively and then the effects of key parameters on the performance of cooperative transmission are discussed. Simulation results demonstrate that the incremental cooperation transmission provides better energy efficiency than direct transmission when the communication distance is bigger than the threshold of the distance. Energy efficiency can be enhanced by optimizing the position of the relay node selected or the modulation level.
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Received: 17 August 2009
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Corresponding Authors:
Wang Shao-qing
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