Thèse soutenue

Intergiciel pour la gestion de la qualité de service (QdS) dans les environnements de l'informatique diffuse

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Auteur / Autrice : Nebil Ben Mabrouk
Direction : Valérie IssarnyNikolaos Georgantas
Type : Thèse de doctorat
Discipline(s) : Informatique
Date : Soutenance en 2012
Etablissement(s) : Paris 6

Résumé

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Pervasive computing is an intuitive evolution of computing paradigms driven by the wide adoption of mobile devices and wireless networks. It introduces a novel way to support users in their everyday life based on open and dynamic environments populated with unobtrusive services able to perform user tasks on the fly. Nevertheless, supporting user tasks from a functional point of view is not enough to gain the user’s satisfaction. Users instead require that their tasks meet a certain Quality of Service (QoS) level. In the context of pervasive environments, fulfilling user tasks while delivering satisfactory QoS brings about several challenges that are mainly due to the openness, dynamics, and limited underlying resources of these environments. To cope with these challenges, we present a QoS-aware service-oriented middleware for pervasive environments. The main contributions of this middleware are: (1) a semantic end-to-end QoS model that enables shared understanding of QoS in pervasive environments, (2) an efficient QoS-aware service composition approach allowing to build service compositions able to fulfill the user functional and QoS requirements, and (3) a QoS-driven adaptation approach to cope with QoS fluctuations during the execution of service compositions. The proposed contributions are implemented within a middleware platform called QASOM and their efficiency is validated based on experimental results.