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<dc:title xml:lang="en">Optimizing real-time communications over the Internet protocol</dc:title>
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<dc:subject xml:lang="fr">communication</dc:subject>
<dc:subject xml:lang="fr">WiFi</dc:subject>
<dc:subject xml:lang="fr">IPv6</dc:subject>
<dc:subject xml:lang="en">WiFi networks</dc:subject>
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<dcterms:abstract xml:lang="fr">Dans cette thèse, nous présenterons d'abord un état de l'art décrivant les mécanismes et procédures existantes permettant le déplacement des appareils mobiles au travers de plusieurs réseaux WiFi de type IPv6.Nous décrirons alors le travail réalisé sur plusieurs optimisations permettant d'améliorer la transparence lors du déplacement entre différents réseaux WiFi et rendant le basculement imperceptible pour l'utilisateur. Le travail que nous avons fait pour optimiser les procédures de mobilité a été fait sur 3 couches différentes, la couche liaison, la couche réseau et la couche application. Dans la deuxième partie de cette thèse nous nous concentrons sur l'optimisation des communications temps réel quelle que soit la configuration réseau ainsi que la facilitation de leur déploiement. Nous nous sommes penchés sur l'adaptation des algorithmes peertopeer et nous décrivons les protocoles XPP et XPPPCAN qui permettent l'utilisation des DHTs en tant que registrar SIP.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In this thesis we will first present a state of the art description of existing mechanisms and procedures that allow mobile devices to move through IPv6 WiFi networks.We will then describe work completed on several optimizations that allow us to improve user experience during mobility in WiFi networks and to implement completely seamless handovers. The work that we have completed on optimizing these mobility procedures has been implemented on the connection, network and the application layers of the OSI model. In the second part of this thesis we concentrate on optimizing realtime communication, improving their operation regardless of the network configuration and simplifying their deployment. We therefore focus on the use of peertopeer algorithms. In this part we also describe the XPP and XPPPCAN protocols created during our work on the thesis, which allow the use of the distributed hash tables as a means of replacing centralized SIP registrars.</dcterms:abstract>
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