Abstract:

As the increase of real time application, the time synchronization between nodes in the wireless networks becomes more important. Time synchronization can help improving the user experience and raising the efficiency of resources and the stability of the systems. The precision time protocol (PTP) is widely used in clock synchronization mechanisms. However, the accuracy of PTP is declined due to the random asymmetric delay in wireless networks. Although statistical estimation techniques can improve the synchronization accuracy, large samples are needed to collect. This will lead to slow convergence, and it will cause memory problems for the limited resources device. Firstly, the property of clock offset is analyzed. Then, a synchronization algorithm based on grey prediction using the GM (1,1) model is proposed to realize fast clock synchronization. Grey theory is for inexperienced, less data and uncertain problems. It’s suitable for clock synchronization of wireless networks. The experiment result shows that the proposed solution can obtain a fast clock synchronization with highprecision.