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On Energy-Efficient Time Synchronization for Wireless Sensors under Large-Scale and Small-Scale Fading Effects

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DOI: 10.4236/wsn.2013.510021    4,024 Downloads   6,150 Views   Citations


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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P. Briff, A. Lutenberg, L. Rey Vega and F. Vargas, "On Energy-Efficient Time Synchronization for Wireless Sensors under Large-Scale and Small-Scale Fading Effects," Wireless Sensor Network, Vol. 5 No. 10, 2013, pp. 181-193. doi: 10.4236/wsn.2013.510021.


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