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Resilience of Timed Systems

Abstract : This paper addresses reliability of timed systems in the setting of resilience, that considers the behaviors of a system when unspecified timing errors such as missed deadlines occur. Given a fault model that allows transitions to fire later than allowed by their guard, a system is universally resilient (or self-resilient) if after a fault, it always returns to a timed behavior of the non-faulty system. It is existentially resilient if after a fault, there exists a way to return to a timed behavior of the non-faulty system, that is, if there exists a controller which can guide the system back to a normal18behavior. We show that universal resilience of timed automata is undecidable, while existential resilience is decidable, in EXPSPACE. To obtain better complexity bounds and decidability of universal resilience, we consider untimed resilience, as well as subclasses of timed automata.
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https://hal.inria.fr/hal-03129402
Contributor : Loic Helouet Connect in order to contact the contributor
Submitted on : Thursday, August 26, 2021 - 1:37:47 PM
Last modification on : Friday, August 5, 2022 - 2:54:52 PM

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FSTTCS_2021_paper_80.pdf
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  • HAL Id : hal-03129402, version 2

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Sundararaman Akshay, Blaise Genest, Loïc Hélouët, Shankara Krishna, Sparsa Roychowdhury. Resilience of Timed Systems. 2020. ⟨hal-03129402v2⟩

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