Integration of fluid-based analytical model with packet-level simulation for analysis of computer networks

Tak Kin Yung; Jay Martin; Mineo Takai; Rajive Bagrodia

doi:10.1117/12.434307

24 July 2001 Integration of fluid-based analytical model with packet-level simulation for analysis of computer networks

Tak Kin Yung, Jay Martin, Mineo Takai, Rajive Bagrodia

Proceedings Volume 4523, Internet Performance and Control of Network Systems II; (2001) https://doi.org/10.1117/12.434307
Event: ITCom 2001: International Symposium on the Convergence of IT and Communications, 2001, Denver, CO, United States

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.

Citation Download Citation

Tak Kin Yung, Jay Martin, Mineo Takai, and Rajive Bagrodia "Integration of fluid-based analytical model with packet-level simulation for analysis of computer networks", Proc. SPIE 4523, Internet Performance and Control of Network Systems II, (24 July 2001); https://doi.org/10.1117/12.434307

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