Heon Man Jung, Jung Hyun Lee

The KIPS Transactions:PartC, Vol. 13, No. 6, pp. 691-700, Oct. 2006
http://dx.doi.org/10.3745/KIPSTC.2006.13C.6.691,   PDF Download:
Keywords: Context-Aware Model, Context Ontology, Context-Aware Middleware, Open Services Gateway Initiative(OSGi), Ubiquitous Computing
Abstract

To support context-aware services in ubiquitous computing environments, there are required dynamic context managing, context reasoning and context modeling technologies. In previous researches, context services are designed using context ontology used in context aware middleware. So, context service cannot change the context ontology in execution time. In this paper, we propose a hierarchical ontology-based context management model and design a context-aware middleware based on this model for supporting active application adaptability and reflecting users' requirements dynamically in contextual changes. It also provides efficient support for inferencing, interpreting, acquiring and discovering various contexts to build context-aware services and presents a resolution method for context conflict which is occurred in execution of service. As the middleware is implemented on the OSGi framework, it can cause interoperability among devices such as computers, PDAs, home appliances and sensors. It can also support the development and operation of context aware services, which are required in the ubiquitous computing environment.

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