Computer Science ›› 2015, Vol. 42 ›› Issue (10): 81-87.

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Energy-efficient and Reliability under White Gaussian Noise Channels of WSNs

CHEN Xue and LIU An-feng   

  • Online:2018-11-14 Published:2018-11-14

Abstract: The nodel optimization of wireless sensor networks can improve network performance.A cross-layer optimization method was proposed,which is based on energy consumption characteristics and the relationship between date transmission reliability and energy consumption.It can not only balance energy consumption,improve network lifetime,but also ensure data transmission reliability between nodes of wireless sensor networks under additive white Gaussian noise.First,from mathematics,we strictly gave the conditions of optimization method of optimal nodal number N*,nodal placement d* and nodal transmission structure p* under minimum total energy consumption.Then,for the fact that nodal energy consumption is higher for nodes which are near the sink and nodes which are far from the sink have remaining energy,and date transmission reliability is directly proportional to energy consumption,we conducted a cross-layer optimization strategy.For node which is near to sink,we reduced its reliability to energy consumption and increased network lifetime.For node which is far from sink,we improved its reliability to make full use of its remaining energy,so that network energy consumption is balanced and network lifetime is improved.In the end,the theoretical analysis and experimental results show that our optimal design can improve the network lifetime by 10%~90%,network utility by 20% and guarantee desire level of reliability.

Key words: Wireless sensor networks,Energy utilization,Cross layer optimal,Reliability,Network lifetime

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