COSMOS, composition de noeuds de contexte

Ubiquitous applications are facing a large diversity of execution contexts. However, this diversity requires some continual adaptation to preserve the correct execution of these applications. Consequently, the observation of the context plays an important role. Even if “usercentered” and “system” approaches have proven their relevance in this domain, they suffer from some limitations when expressing the composition of inferences and when considering the scalability issue. Therefore, we propose to reorganise the classical functionalities of a context manager to systematically introduce cycles “collect / interpretation / identification of situations”. This approach is based on the definition of the concept of context nodes composed in a graph (hierarchy with sharing), and the mapping of the concept into components and software architecture for easing the definition and the management of context management policies. MOTS-CLÉS : Gestion de contexte, architecture, composants, resources système.