DesignandImplementationofaReferenceModelforContextManagement inMobileAd-HocNetworks

The fundamentalparadigmof context-aware computinghas lead to a diversity of conceivable context-based applications. In order to support these applications, efficient and scalable context management platforms have become utterly important. In this paper we propose a layered reference model that encapsulatessuitable abstractionsto tackle the complexityof context managementin mobile ad-hocnetworks. For each layer, we outline strategies and mechanisms we have developed to manage context information efficiently so that it can readily be used by context-based services and applications in these networks. In addition, we discuss refinements of the current model that we currently investigate,whicharerelatedto datasemanticssuchascontext quality and expressive location models, performance enhancementby adaptation,and aspects regarding the integration of ad-hoc context management with infrastructurebased systems leading to a hybrid system structure.

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