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Synthèse de commande pour des réseaux de communication énergétiquement performants

Abstract : The computer tools (as the routers and calculators among others) present a high energy consumption. This problem has been already included in mobile networks. The question of energy is just beginning to be considered for "fixed" large-scale systems that reach nowadays high sizes. The objective of this thesis is to address the problem of energy consumption in wired communication networks: provide a certain level of quality of service (QoS) with respect to the packet lost, response speed and robustness with respect to different sampling periods while controlling power consumption of the system. The goal is to design a method from the theory of control, which guarantees these QoS. This technique is applied locally to a network equipment (router, switch ...) and the control law used to distribute temporally the traffic through a controlled node in the wired communications networks. In this work, we considere that the communication between nodes are performed by routers ALR type. In order to deal with energy reduction problem, we propose an extended ALR energy model adapted to control theory. For this model, we need to choose two parameters (ß, ?) allowing to choose the queue length reference, qref, and the related update time-window, Tqref. These parameters have been chosen after performing some simulations with different combinations of parameters (ß, ?). We have seen that the variation of these two parameters provide an impact over the QoS as well as the energy reduction. The theoretical results are then tested in Matlab-Simulink as well as some experiments under the simulator NS-2. Simulations showed that the energy consumption in communications networks is reduced while ensuring a certain level of QoS.
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  • HAL Id : tel-01280075, version 2

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Wael Zouaoui. Synthèse de commande pour des réseaux de communication énergétiquement performants. Automatique. Université Paul Sabatier - Toulouse III, 2016. Français. ⟨NNT : 2016TOU30002⟩. ⟨tel-01280075v2⟩

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