A New Power-efficient Distributed Method for Clock Synchronization in Sensor Networks

This paper presents a new distributed power-efficient method consisting of clock synchronization achieving and maintaining protocols. The achieving protocol can realize synchronization of time variations and initial time errors independently and simultaneously with an energy-efficient communication scheme designed in the paper. Then a stopping criterion is proposed to degrade the protocol into a maintaining one which is synthesized under the general strongly connected digraph to achieve more energy conservation. Numerical simulations are given to illustrate the performance of the method.