Gestion de la qualité de service des systèmes publier/souscrire déployés sur un réseau mobile ad hoc

Abstract : Mobile ad-hoc networks (MANET) is a set of nodes, communicating meaning wireless channel without any centralized control. The main characteristic of MANET is the frequent mobility of its nodes leading to some dynamic changes of topology. Nodes mobility in such networks introduces possible disconnections between adjacent nodes, and more generally quality of service (QoS) degradation issues that do not fit well with QoS requirements of QoS sensitive applications. Publish/subscribe communicating system has been proposed at the middleware layer in order to communicate mobile entities in MANET. Such system is a decoupled interaction between publishers (or producers) and receivers (or consumers).Our goal in this thesis is to provide a QoS management for publish/subscribe systems when deployed on MANET while assuming a best effort flux at the routing layer. This thesis proposes an analytical model for latency aware publish/subscribe systems on mobile ad-hoc networks. The proposed approach combines both proactive and reactive statistical analysis.On the one hand, the reactive analysis, suitable for multimedia applications, detects failures by approximating latency series with Gumbel distribution. On the other hand, the proactive analysis, suitable for crisis management applications, forecasts failures occurrence relying on Auto Regression or Auto Regressive Integrated Moving Average Formulas. Finally, a hybrid analysis was proposed by dynamically switching from reactive to predictive forms of analysis whenever quality of service violations are noticed. In order to extract failure cause, we refer to the correlation method once failure was detected or predicted. Simulations done, using Jist/Swans simulator, under different scenariosproved the efficiency and accuracy of the proposed scheme.
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Imene Lahyani Abdennadher. Gestion de la qualité de service des systèmes publier/souscrire déployés sur un réseau mobile ad hoc. Réseaux et télécommunications [cs.NI]. INSA de Toulouse; Co-tutelle avec l'école nationale d'ingénieurs de Sfax, 2015. Français. ⟨NNT : 2015ISAT0053⟩. ⟨tel-02094364⟩

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