Re-engineering cyber-physical control applications for hybrid communication protocols

Dip Goswami, Reinhard Schneider, Samarjit Chakraborty

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

19 Citations (Scopus)


In this paper, we consider a cyber-physical architecture where multiple control applications are divided into multiple tasks, spatially distributed over various processing units that communicate over a bus implementing a hybrid communication protocol, i.e., a protocol with both time-triggered and event-triggered communication schedules (e.g., FlexRay). In spite of efficient utilization of communication bandwidth (BW), event-triggered protocols suffer from unpredictable temporal behavior, which is exactly the opposite in the case of their time-triggered counterparts. In the context of communication delays experienced by the control-related messages exchanged over the shared communication bus, we observe that a distributed control application is more prone to performance deterioration in transient phases compared to in the steady-state. We exploit this observation to re-engineer control applications to operate in two modes, in order to optimally exploit the bi-modal (time- and event-triggered) characteristics of the underlying communication medium. Depending on the state (transient or steady) of the system, both, the control inputs and the communication schedule are now switched. Using a FlexRay-based case study, we show that such a design provides a good trade-off between control performance and bus utilization.
Original languageEnglish
Title of host publication2011 Design, Automation & Test in Europe
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)978-3-9810801-8-6
ISBN (Print)978-1-61284-208-0
Publication statusPublished - 2011
Externally publishedYes
Event14th Design, Automation and Test in Europe Conference and Exhibition (DATE 2011)
- Alpexpo Espace Alpes Congres, Grenoble, France
Duration: 14 Mar 201118 Mar 2011
Conference number: 14


Conference14th Design, Automation and Test in Europe Conference and Exhibition (DATE 2011)
Abbreviated titleDATE 2011
Internet address


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