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Space uncertain simulation events: some concepts and an application to optimistic synchronization

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2 Author(s)
Quaglia, F. ; Dipt. di Informatica e Sistemistica, Univ. di Roma La Sapienza, Italy ; Beraldi, R.

The notion of temporal uncertainty, expressed as the possibility for an event to occur in an interval of simulation time, rather than at a specific instant, has been recently proposed and exploited in order to enhance the performance of parallel/distributed simulation systems. In this paper, we propose the concept of "spatial uncertainty" expressed as the possibility for a simulation event to occur in one of a set of points within the simulated system space. How to handle/exploit space uncertain events in an optimistic simulation system is discussed. Also, experimental results for optimistic simulations of a personal communication system (PCS) modeled with space uncertain events are reported. These results show the ability of spatial uncertainty to increase the performance of the parallel simulation system by providing a more flexible approach to synchronization.

Published in:

Parallel and Distributed Simulation, 2004. PADS 2004. 18th Workshop on

Date of Conference:

16-19 May 2004