On Energy-Efficient Time Synchronization for Wireless Sensors under Large-Scale and Small-Scale Fading Effects
On Energy-Efficient Time Synchronization for Wireless Sensors under Large-Scale and Small-Scale Fading Effects作者机构：CONICET National Scientific and Technical Research Council Buenos Aires Argentina LPSC Faculty of Engineering University of Buenos Aires Buenos Aires Argentina Embedded Systems Laboratory Faculty of Engineering University of Buenos Aires Buenos Aires Argentina Embedded Systems Laboratory Faculty of Engineering University of Buenos Aires Buenos Aires Argentina CONICET National Scientific and Technical Research Council Buenos Aires Argentina Signals and Systems for Computing Group Faculty of Engineering Catholic University Porto Alegre Brazil
出 版 物：《Wireless Sensor Network》 (无线传感网络（英文）)
年 卷 期：2013年第5卷第10期
页 面：181-193页
学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统]
主 题：Wireless Sensor Networks Clock Offset Estimation Time Synchronization Wireless Channel Fading
摘 要：In this work, the existing trade-off between time synchronization quality and energy is studied for both large-scale and small-scale fading wireless channels. We analyze the clock offset estimation problem using one-way, two-way and N-way message exchange mechanisms affected by Gaussian and exponentially distributed impairments. Our main contribution is a general relationship between the total energy required for synchronizing a wireless sensor network and the clock offset estimation error by means of the transmit power, number of transmitted messages and average message delay, deriving the energy optimal lower bound as a function of the time synchronization quality and the number of hops in a multi-hop network.
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