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Evaluation de performances de réseaux de communication à l'aide de chaînes de Markov hybrides

Abstract : This thesis is devoted to study the performance evaluation of communication networks. We are especially interested in their modeling with hybrid Markov chains and analytical solutions of the models. The network performance is characterized with parameters such as the flow or the losses. These parameters can be obtained by means of simulators based on a discrete mode!. But this needs sometimes long computing times. That is why we have developped an analytical method based on a fluid mode! of the network. The use ofsuch a model associated with an aggregation method reduces the problem complexity and allows a faster analytical resolution than simulation. We first study the simple system, known as mono-buffer, in order to find sorne results that can be used in more complex networks. Then, we present an analytical method for complex router networks while using Markovian state representation of the considered network. Since most of the networks have convergences and divergences, this method was adapted for the performance evaluation in this case. The results obtained are comparable with those of the classical simulators but in shorter computing times.
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Contributor : Patricia Reynier <>
Submitted on : Friday, September 14, 2007 - 3:45:42 PM
Last modification on : Friday, November 6, 2020 - 3:49:36 AM
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  • HAL Id : tel-00168342, version 1



Alexandre Royer. Evaluation de performances de réseaux de communication à l'aide de chaînes de Markov hybrides. Automatique / Robotique. Institut National Polytechnique de Grenoble - INPG, 2006. Français. ⟨tel-00168342⟩



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