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Predicate Monitoring in Distributed Cyber-Physical Systems

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Runtime Verification (RV 2021)

Part of the book series: Lecture Notes in Computer Science ((LNPSE,volume 12974))

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Abstract

This paper solves the problem of detecting violations of predicates over distributed continuous-time and continuous-valued signals in cyber-physical systems (CPS). We assume a partially synchronous setting, where a clock synchronization algorithm guarantees a bound on clock drifts among all signals. We introduce a novel retiming method that allows reasoning about the correctness of predicates among continuous-time signals that do not share a global view of time. The resulting problem is encoded as an SMT problem and we introduce techniques to solve the SMT encoding efficiently. Leveraging simple knowledge of physical dynamics allows further runtime reductions. We fully implement our approach on two distributed CPS applications: monitoring of a network of autonomous ground vehicles, and a network of aerial vehicles. The results show that in some cases, it is even possible to monitor a distributed CPS sufficiently fast for online deployment on fleets of autonomous vehicles.

This work is sponsored in part by the United States NSF FMitF-1917979 and CCF-2118356 awards.

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Author information

Authors and Affiliations

  1. Michigan State University, East Lansing, MI, 48824, USA

    Anik Momtaz & Borzoo Bonakdarpour

  2. Oregon State University, Corvallis, OR, 97331, USA

    Niraj Basnet & Houssam Abbas

Authors
  1. Anik Momtaz
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  2. Niraj Basnet
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  3. Houssam Abbas
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  4. Borzoo Bonakdarpour
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Corresponding author

Correspondence to Borzoo Bonakdarpour .

Editor information

Editors and Affiliations

  1. University of Virginia, Charlottesville, VA, USA

    Lu Feng

  2. Ben-Gurion University of the Negev, Be'er Sheva, Israel

    Dana Fisman

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Momtaz, A., Basnet, N., Abbas, H., Bonakdarpour, B. (2021). Predicate Monitoring in Distributed Cyber-Physical Systems. In: Feng, L., Fisman, D. (eds) Runtime Verification. RV 2021. Lecture Notes in Computer Science(), vol 12974. Springer, Cham. https://doi.org/10.1007/978-3-030-88494-9_1

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  • DOI: https://doi.org/10.1007/978-3-030-88494-9_1

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  • Online ISBN: 978-3-030-88494-9

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