CENTRO DE SIMULACION COMPUTACIONAL PARA APLICACIONES TECNOLOGICAS
Unidad Ejecutora - UE
On energy-efficient time synchronization for wireless sensors under large-scale and small-scale fading effects
PABLO BRIFF; ARIEL LUTENBERG; LEONARDO REY VEGA; FABIAN VARGAS
Wireless Sensor Networks
Scientific Research Publishing
Lugar: Delaware; Año: 2013 vol. 5 p. 181 - 181
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.