Lifetime optimization for wireless sensor networks under re-transmission (无线传感器网络在重传状态下的寿命优化)

Ruiying Li
Dr. Ruiying Li is an assistant professor in the School of Reliability and Systems Engineering at Beihang University, where she also works in Science & Technology on Reliability & Environmental Engineering Laboratory. She obtained her B.E. and Ph.D. degrees in Reliability Engineering from Beihang University in 2004 and 2009, respectively. She was a visiting scholar in the Department of Syst...read more



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The lifetime of wireless sensor networks (WSN) is strongly affected by the energy consumption, which is partly attributed to retransmission. In this presentation, the lifetime of the WSN is analyzed based on basic energy consumption models and a retransmission model. Optimization models are proposed with the objective of maximizing WSN lifetime under the coverage and success transmission rate constraints. The genetic algorithm and the generalized reduced gradient method are applied to solve these problems. New optimized node deployment are proposed for three types of WSN, i.e., linear, homogeneous and heterogeneous. Our case studies illustrate that the lifetime of WSN with and without retransmission are different, and it is important to consider retransmission in WSN lifetime optimization.

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