Research on Time Synchronization of WIA-PA Industrial Wireless Networks

Abstract

Firstly, the article introduces the WIA-PA wireless network which is under study at present and can be used for industrial control. Aiming to FTSP algorithm can be used correctly in this network, combined with the unique TDMA media access control method of this network, this article takes a way building the logic synchronization tree to improve the precision of multi-hop FTSP clock synchronization. Then it use Bayesian estimation to improve the accuracy of clock synchronization. The experiment results show that after the using of Bayesian estimation, the time synchronization precision of WIA-PA network improve clearly. Industrial wireless network technology is a new wireless communication technology emerging in this century for information exchange between devices ,and it will play an important role for improving product quality, lowering production costs, improving energy efficiency in the future.This special kind of wireless sensor networks is very suitable for used in harsh environments of industrial fields with anti-interference ability, low energy consumption, communication, real-time characteristics.Time synchronization is an important support technology of wireless sensor network's application.The alignment of sensor communication slot, sensor self-positioning, and coordinated operation among sensor nodes all need the clock of all nodes in wireless sensor network stay time synchronization(1).