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Non-Linear Offline Time Synchronization

In: Operations Research Proceedings 2010

Author

Listed:
  • Li Luo

    (Heinrich-Heine-Universität)

  • Björn Scheuermann

    (Heinrich-Heine-Universität)

Abstract

In the design process of communication protocols it is necessary to perform repeated network communication experiments. Each run results in large event logs. The analysis of these logs is crucial to find and to understand unexpected behaviors and design flaws. Intrinsic to network communication these logs suffer from random delays, drop outs, and deviating clocks, which complicate the analysis. Online synchronization protocols may interfere an experiment gravely and are unable to handle delays and drop outs. Offline synchronization approaches based on affine linear clocks using maximum likelihood estimation and least squares estimation are introduced by [3] and [2], respectively. We show that their approaches can be extended to non-linear clocks. The problem leads to a sparse linear program with a well-known structure, which can be readily solved by the interior point method. Under weak assumptions a consistency result is available for the least squares estimation.

Suggested Citation

  • Li Luo & Björn Scheuermann, 2011. "Non-Linear Offline Time Synchronization," Operations Research Proceedings, in: Bo Hu & Karl Morasch & Stefan Pickl & Markus Siegle (ed.), Operations Research Proceedings 2010, pages 629-634, Springer.
    • Handle: RePEc:spr:oprchp:978-3-642-20009-0_99
    DOI: 10.1007/978-3-642-20009-0_99
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