Today’s vehicles employ a variety of time-triggered protocols, such as FlexRay and TTEthernet, to transmit periodic messages originating from safety-critical applications. One of the major challenges with time-triggered transmissions is jitter, which is the unpredictable delay-induced deviation from the actual periodicity of a message. Failure to account for jitter can have catastrophic consequences in time-critical automotive cyber-physical systems. In this chapter, we propose a novel message scheduling framework, called JAMS-SG, that synthesizes message schedules at design time using our proposed hybrid heuristic approach. At runtime, JAMS-SG employs a Multi-Level Feedback Queue (MLFQ) to handle jitter-affected time-triggered messages and high-priority event-triggered messages. Moreover, JAMS-SG uses a runtime scheduler to transmit messages and ensure that all deadline constraints are satisfied. Our simulation results, based on messages and network traffic data from a real-world vehicle, indicate that JAMS-SG is highly scalable and outperforms the best-known prior work in the area in the presence of jitter.


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    Titel :

    Reliable Real-Time Message Scheduling in Automotive Cyber-Physical Systems


    Beteiligte:
    Kukkala, Vipin Kumar (Herausgeber:in) / Pasricha, Sudeep (Herausgeber:in) / Kukkala, Vipin Kumar (Autor:in) / Bradley, Thomas (Autor:in) / Pasricha, Sudeep (Autor:in)


    Erscheinungsdatum :

    02.09.2023


    Format / Umfang :

    40 pages




    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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