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Proceedings Paper

Integration of fluid-based analytical model with packet-level simulation for analysis of computer networks
Author(s): Tak Kin Yung; Jay Martin; Mineo Takai; Rajive Bagrodia
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Paper Abstract

Fluid flow analytical models have been shown to be able to capture the dynamics of TCP flows and can scale well to solving for networks with a large number of flows. However, accurate closed form solutions are not yet available for wireless networks. Traditional packet-level discrete event simulations provide accurate predictions of network behavior, but their solution time can increase significantly with the number of flows being simulated. Integration of fluid flow models with packet-level simulators appears to offer significant benefits. In this paper, we describe an approach to integrate fluid flow models into QualNet, a scalable packet-level simulator. We validate the mixed model with detailed packet-level simulations for the scenarios considered in this paper. The execution time of the mixed model is significantly impacted by the frequency with which the analytical model must be solved in response to changes in the data rate at the interface of the packet-level and analytical models. We present a time averaging approach to mitigate this impact and present the results of the resulting tradeoff between prediction accuracy and model execution time.

Paper Details

Date Published: 24 July 2001
PDF: 14 pages
Proc. SPIE 4523, Internet Performance and Control of Network Systems II, (24 July 2001); doi: 10.1117/12.434307
Show Author Affiliations
Tak Kin Yung, Univ. of California/Los Angeles (United States)
Jay Martin, Univ. of California/Los Angeles (United States)
Mineo Takai, Univ. of California/Los Angeles (United States)
Rajive Bagrodia, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 4523:
Internet Performance and Control of Network Systems II
Robert D. van der Mei; Frank Huebner-Szabo de Bucs, Editor(s)

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