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31/2007 : The Effect of Quartz Drift on Convergence-Average based Clock Synchronization

RR Number
31/2007
Conference
12th IEEE Conference on Emerging Technologies and Factory Automation
Author(s)
Eric Armengaud, Andreas Steininger, Alexander Hanzlik
Abstract
The aim of this work is to study how the temporal behavior of time-triggered distributed systems is influenced by a drift of their underlying quartz. More especially, we focus on convergence-average clock synchronization used e.g. for TTP-C and FlexRay. We show that, for a fault free system in a stable environment, the global time converges to an interval spanned by the accuracies of the physical clocks independently of the system history. Although this result seems quite intuitive, it is not self-evident, given the complex behavior of distributed clock synchronization. Moreover, this proof allows to derive diagnosis information about the underlying quartz and is the enabler of remote system test.
Bibtex
@article{ armengaud:2007-31,
  author =       "Eric Armengaud and Andreas Steininger and Alexander Hanzlik",
  title =        "The Effect of Quartz Drift on Convergence-Average based Clock Synchronization",
  journal =      "12th IEEE Conference on Emerging Technologies and Factory Automation",
  year =         "2007",
  month =        "Sep."
}
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