Time-parallel simulation of wireless ad hoc networks with compressed history

    Authors

    G. Q. Wang; L. Boloni; D. Turgut;D. C. Marinescu

    Comments

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    Abstract

    Time-parallel simulation (TPS) is a technique which partitions the timespan of the simulation into independently executed simulation segments. Unless the simulated process is regenerative, the output of TPS is only an approximation of the corresponding serial simulation. Previously we have adapted TPS to the simulation of wireless ad hoc networks. By prefixing the measured simulation segment with a warmup interval which can be dynamically extended, we were able to achieve arbitrary accuracy. In general, higher accuracy requires a longer warmup interval, which decreases the speedup. In this paper we introduce compressed history, a technique which improves the performance of TPS for a class of processes which require long warmup intervals to achieve satisfactory accuracy. Compressed history replaces part of the warmup interval, and speeds up the simulation by retaining only those past events that affect significantly the state at the beginning of the measured interval. We present compressed history in general terms, and provide a detailed description of its implementation, tuning, and performance results for the concrete example of the DSDV proactive ad hoc routing protocol. (C) 2008 Elsevier Inc. All rights reserved.

    Journal Title

    Journal of Parallel and Distributed Computing

    Volume

    69

    Issue/Number

    2

    Publication Date

    1-1-2009

    Document Type

    Article

    First Page

    168

    Last Page

    179

    WOS Identifier

    WOS:000262524200006

    ISSN

    0743-7315

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