A proportional integral estimator-based clock synchronization protocol for wireless sensor networks. (November 2017)

• Record Type: Journal Article
• Authors: Yang, Wenlun; Fu, Minyue
• Is Part Of: ISA transactions. Volume 71:Part 1(2017:Nov.)
• Page Start: 148
• Page End: 160
• Publication Date: 2017-11
• Subjects: Wireless sensor networks -- Clock synchronization -- Proportional–integral estimator; Engineering instruments -- Periodicals; Engineering instruments; Periodicals; Electronic journals; 629.805
• DOI: 10.1016/j.isatra.2017.03.025
• Languages: English
• ISSNs: 0019-0578

Abstract

Abstract: Clock synchronization is an issue of vital importance in applications of WSNs. This paper proposes a proportional integral estimator-based protocol (EBP) to achieve clock synchronization for wireless sensor networks. As each local clock skew gradually drifts, synchronization accuracy will decline over time. Compared with existing consensus-based approaches, the proposed synchronization protocol improves synchronization accuracy under time-varying clock skews. Moreover, by restricting synchronization error of clock skew into a relative small quantity, it could reduce periodic re-synchronization frequencies. At last, a pseudo-synchronous implementation for skew compensation is introduced as synchronous protocol is unrealistic in practice. Numerical simulations are shown to illustrate the performance of the proposed protocol. Abstract : Highlights: A PI estimator-based clock synchronization protocol is proposed for WSNs. Synchronization error of skews can be bounded into a relative small steady state. EBP can improve synchronization accuracy under time-varying clock skew.