The Wireless Control Bus: Enabling Efficient Multi-Hop Event-Triggered Control with Concurrent Transmissions

Matteo Trobinger, Gabriel De Albuquerque Gleizer, Timofei Istomin, Manuel Mazo, Amy L. Murphy, Gian Pietro Picco

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Event-triggered control (ETC) holds the potential to significantly improve the efficiency of wireless networked control systems. Unfortunately, its real-world impact has hitherto been hampered by the lack of a network stack able to transfer its benefits from theory to practice specifically by supporting the latency and reliability requirements of the aperiodic communication ETC induces. This is precisely the contribution of this article.Our Wireless Control Bus (WCB) exploits carefully orchestrated network-wide floods of concurrent transmissions to minimize overhead during quiescent, steady-state periods, and ensures timely and reliable collection of sensor readings and dissemination of actuation commands when an ETC triggering condition is violated. Using a cyber-physical testbed emulating a water distribution system controlled over a real-world multi-hop wireless network, we show that ETC over WCB achieves the same quality of periodic control at a fraction of the energy costs, therefore unleashing and concretely demonstrating its full potential for the first time.

Original languageEnglish
Article number3485467
Number of pages29
JournalACM Transactions on Cyber-Physical Systems
Volume6
Issue number1
DOIs
Publication statusPublished - 2022

Keywords

  • concurrent transmissions
  • Event-based control
  • wireless sensor and actuator networks

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