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Proceedings 15th Workshop on Parallel and Distributed Simulation (2001)
Lake Arrowhead, California
May 15, 2001 to May 18, 2001
ISSN: 1087-4097
ISBN: 0-7695-1104-X
pp: 14
Kaixin Xu , University of California, Los Angeles
Mineo Takai , University of California, Los Angeles
Jay Martin , University of California, Los Angeles
Rajive Bagrodia , University of California, Los Angeles
While network simulation is a widely used technique for developing, testing and evaluating network protocols and applications, it is difficult and time-consuming to develop detailed models of the entire protocol stack and the application that is being evaluated. Hybrid component networks combine simulation models of protocols and applications with physical implementations of other protocols and/or applications, which can alleviate modeling complexity and build accurate models. However, hybrid component networks require that the simulated components execute faster than real time. Parallel simulation techniques can greatly improve the performance of hybrid component networks and facilitate evaluation of larger networks than would be feasible only with sequential execution. In parallel simulation, one of the most important properties to be exploited from the simulation is "lookahead," but none of the previous studies has exploited the lookahead from the physical implementation of protocols or applications. We have developed Virtual Socket Interface (VSI), which exploits real time lookahead from the interactions between operational applications and simulated networks in GloMoSim [1], a parallel discrete event network simulator. This paper presents the implementation of VSI with the notion of real time lookahead and evaluates VSI for typical wireless ad hoc network scenarios. The results of the study demonstrate that the parallel simulation with the real time lookahead greatly enhances the capability of hybrid component networks.

M. Takai, K. Xu, R. Bagrodia and J. Martin, "Looking Ahead of Real Time in Hybrid Component Networks," Proceedings 15th Workshop on Parallel and Distributed Simulation(PADS), Lake Arrowhead, California, 2001, pp. 14.
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