Low Overhead Minimum Variance Time Synchronization for Time-Sensitive Wireless Sensor Networks

Zhian Jia, Dongliang Cui*, Xuewu Dai*, Zhi-Wei Liu, Shuxin Liu, Tianyou Chai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Targeting to improve the time synchronization accuracy of multi-hop Time-Sensitive Wireless Sensor Networks (TS-WSNs) for mission-critical industrial automation applications, a Minimum Variance Time Synchronization (MVTS) algorithm utilizing the concept of Packet-Coupled Oscillators (PkCOs) is proposed. This MVTS algorithm utlizes an output feedback approach to mitigate the impact of communication noise on the accumulation of synchronization errors. In addition, a Time-Division Multiple Access (TDMA) packet-exchange superframe is introduced to achieve efficient and low-overhead time synchronization. The optimal gain matrix of the MVTS algorithm is obtained by the Linear Matrix Inequality (LMI) optimization with theoretic analysis. The proposed MVTS algorithm is evaluated by both simulation and experiments on an IEEE 802.15.4 hardware testbed. The experimental results show that the proposed algorithm can effectively reduce the growth rate of clock offset along multi-hop nodes and improve the time synchronization accuracy of the TS-WSNs.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalIEEE Transactions on Automation Science and Engineering
Early online date1 Jul 2024
Publication statusE-pub ahead of print - 1 Jul 2024

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