An Improved Time Synchronization Algorithm for Wireless Sensor Networks

Time synchronization is an essential problem for wireless sensor networks (WSNs). The synchronization algorithms presented in were based on the constant-rate clock model, thus could not compensate the clock drift. In this paper, based on the more reasonable bound-drift clock model and, we propose an improved time synchronization algorithm of and. In the algorithm, we develop a new method to estimate and compensate the clock drift and the clock offset. Mathematical analyses and simulations are presented in this paper, and verify the effectiveness of our synchronization algorithm.