20/2008 : Safe Deterministic Replay for Stimulating the Clock Synchronization Algorithm in Time-Triggered Systems

RR Number

20/2008

Comment

published version of RR-61/2007

Conference

7th IEEE International Workshop on Factory Communication Systems

Author(s)

Eric Armengaud, Matthias Fuegger, Andreas Steininger

Abstract

Deterministic replay is used during testing to reproduce a scenario and drive the system under test to a given state. In this work, we replay an a-priori defined bus trafffic to influence the clock synchronization mechanism. Beyond testing this distributed mechanism itself, our aim is to draw conclusions on the nodes' bus receiver operation. Since these replay activities are part of a transparent online test procedure, it is important to ensure that they do not represent a threat for proper system operation. We present a respective formal proof for TTP/C, while for the case of FlexRay we show that the system precision can be bounded according to the replay operation applied. Experimental results confirm and illustrate our approach.

Bibtex

@article{ armengaud:2008-20,
  author =       "Eric Armengaud and Matthias Fuegger and Andreas Steininger",
  title =        "Safe Deterministic Replay for Stimulating the Clock Synchronization Algorithm in Time-Triggered Systems",
  journal =      "7th IEEE International Workshop on Factory Communication Systems",
  year =         "2008",
  month =        "May."
}

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