The time-triggered wireless architecture

Romain Jacob, Licong Zhang, Marco Zimmerling, Jan Beutel, Samarjit Chakraborty, Lothar Thiele

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Wirelessly interconnected sensors, actuators, and controllers promise greater flexibility, lower installation and maintenance costs, and higher robustness in harsh conditions than wired solutions. However, to facilitate the adoption of wireless communication in cyber-physical systems (CPS), the functional and non-functional properties must be similar to those known from wired architectures. We thus present Time-Triggered Wireless (TTW), a wireless architecture for multi-mode CPS that offers reliable communication with guarantees on end-to-end delays among distributed applications executing on low-cost, low-power embedded devices. We achieve this by exploiting the high reliability and deterministic behavior of a synchronous transmission based communication stack we design, and by coupling the timings of distributed task executions and message exchanges across the wireless network by solving a novel co-scheduling problem. While some of the concepts in TTW have existed for some time and TTW has already been successfully applied for feedback control and coordination of multiple mechanical systems with closed-loop stability guarantees, this paper presents the key algorithmic, scheduling, and networking mechanisms behind TTW, along with their experimental evaluation, which have not been known so far. TTW is open source and ready to use: https://ttw.ethz.ch.

Original languageEnglish
Title of host publication32nd Euromicro Conference on Real-Time Systems, ECRTS 2020
EditorsMarcus Volp
PublisherSchloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing
ISBN (Electronic)9783959771528
DOIs
StatePublished - 1 Jun 2020
Externally publishedYes
Event32nd Euromicro Conference on Real-Time Systems, ECRTS 2020 - Virtual, Online
Duration: 7 Jul 202010 Jul 2020

Publication series

NameLeibniz International Proceedings in Informatics, LIPIcs
Volume165
ISSN (Print)1868-8969

Conference

Conference32nd Euromicro Conference on Real-Time Systems, ECRTS 2020
CityVirtual, Online
Period7/07/2010/07/20

Keywords

  • Synchronous transmissions
  • Time-triggered architecture
  • Wireless bus

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