Wireless fieldbus networking with precision time synchronization for a low-power WSAN

Ching Han Chen, Ming Yi Lin, Wee Ping Tew

Research output: Contribution to journalArticlepeer-review

Abstract

A wireless sensor actuator network (WSAN) is an essential part of the industrial Internet of things (IIoT) with a cyber-physical system (CPS). However, the lack of time synchronization support for WSANs to date means that losses in synchronization accuracy have not been overcome. In this manuscript, we design a real-time kernel to resolve the precision time synchronization (PTS) problem and achieve dynamic automatic synthesis and rapid deployment in a complex WSAN system. Furthermore, tight coupling between wireless control and time synchronization motivates a Modbus-based precision time protocol (PTP) codesign that integrates industrial fieldbus networks and a PTS design. The experimental results indicate that our proposed PTP performance can far exceed the time synchronization requirement of an industrial real-time system. Finally, the proposed solution is successfully applied to an IoT-based smart lighting system.

Original languageEnglish
Article number104509
JournalMicroprocessors and Microsystems
Volume90
DOIs
StatePublished - Apr 2022

Keywords

  • Cyber-physical system (CPS)
  • GRAFCET virtual machine
  • Industrial internet of things (IIoT)
  • Precision time synchronization (PTS)
  • Wireless sensor actuator network (WSAN)

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