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Master thesis

Support intergiciel pour l'auto-adaptation stable dans les environnements ubiquitaires / A Framework for supporting a stable self-adaptation in ubiquitous environment

Russel Nzekwa 1, 2
1 ADAM - Adaptive Distributed Applications and Middleware
LIFL - Laboratoire d'Informatique Fondamentale de Lille, Inria Lille - Nord Europe
Abstract : Ubiquitous applications are characterized by fluctations of their execution context. Therefore, in order to behave accordingly to their context changes, context-aware system should adapt continously. The main concerns of this work is to handle stable self-adaptation problem for context-aware system. Modeling and processing of context information, are the cornerstone of any ubiquitous application. Exploitation of context information in a ubiquitous computing environment, remains a sensitive task because the context keeps evolving. In particular, existing approaches to self-adaptation systematically trigger recon gurations whenever the surrounding context changes, thus leading to a continuous instability of the system. Although some state-of-the-art middleware approaches de ne context regions to reduce this side-effect, context regions provide strict partitions of the context space, thus solving partially the problem. We believe that the solution of that problem lies on a smart composition of stabilizing algorithms. We suggest a composition model, to both manage the reactivity of stabilization mechanisms in a flexible manner, and improve the effectiveness of the stabilization. We also propose a conceptual architecture that supports our composition model and that guides the developer to the choice of the optimal pattern of composition. Finally, we validate our proposal with an evaluation based on a components based framework for the management of context information COSMOS (Context Entities Composition and Sharing).
Document type :
Master thesis
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https://hal.inria.fr/hal-00765944
Contributor : Russel Nzekwa <>
Submitted on : Monday, December 17, 2012 - 11:47:47 AM
Last modification on : Thursday, February 21, 2019 - 10:52:48 AM

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  • HAL Id : hal-00765944, version 1

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Russel Nzekwa. Support intergiciel pour l'auto-adaptation stable dans les environnements ubiquitaires / A Framework for supporting a stable self-adaptation in ubiquitous environment. Informatique ubiquitaire. 2009. ⟨hal-00765944⟩

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