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Agents ubiquitaires pour un accès adapté aux systèmes d'information :
Le Framework PUMAS

Abstract : Ubiquitous Computing is a recent paradigm whose objective is to allow users to access data any time, anywhere, in particular using Mobile Devices (MD). In this context, insuring the access of nomadic users to Information Systems (IS) through different devices, as well as the adaptation of information to the preferences of the nomadic users and to the context of use of the current session, are two related problems not yet solved. Indeed, nomadic users of IS can be exposed to a great quantity of information which is not always relevant nor is not even simply supported by their MD. For adaptation purposes, an IS must possess data about the context of use - concept which includes the temporal, spatial and material conditions in which the user accesses IS -, but also about the preferences of the user in order to satisfy her/his expectations at the same time in terms of functionalities, contents, and display.
Through two proposals, this thesis tries to give an answer to this double problem. Firstly, we designed and realised a framework called PUMAS which provides nomadic users with an access to the information, which considers the context of use. The approach that we chose is based on agents. Thus, the architecture of PUMAS is composed of four Multi-Agent Systems (MAS) respectively dedicated to connection to IS, the communication between the users and IS, the information management and the adaptation of this information. Secondly, we created a Contextual Profile Management System (CPMS) which contributes to the adaptation of the information delivered to a nomadic user on three aspects: i) a formalization of the notion of preference of the user that allows to model the activities achieved in the system, the expected results of these activities and the way in which these results are presented; ii) a Contextual Matching Algorithm which generates the contextual profile of a nomadic user considering the context of use; iii) a mechanism for managing the conflicts which can occur between the preferences of the user. Finally, the CPMS was integrated into PUMAS within the MAS dedicated to the adaptation.
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Contributor : Angela Cristina Carrillo Ramos <>
Submitted on : Thursday, March 15, 2007 - 8:11:18 PM
Last modification on : Thursday, November 19, 2020 - 12:59:39 PM
Long-term archiving on: : Wednesday, April 7, 2010 - 2:59:44 AM


  • HAL Id : tel-00136931, version 1



Angela Cristina Carrillo Ramos. Agents ubiquitaires pour un accès adapté aux systèmes d'information :
Le Framework PUMAS. Réseaux et télécommunications [cs.NI]. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00136931⟩



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