Gaia: a middleware platform for active spaces
ACM SIGMOBILE Mobile Computing and Communications Review
Aura: an Architectural Framework for User Mobility in Ubiquitous Computing Environments
WICSA 3 Proceedings of the IFIP 17th World Computer Congress - TC2 Stream / 3rd IEEE/IFIP Conference on Software Architecture: System Design, Development and Maintenance
A Reactive Service Composition Architecture for Pervasive Computing Environments
PWC '02 Proceedings of the IFIP TC6/WG6.8 Working Conference on Personal Wireless Communications
Service-Oriented Architecture: Concepts, Technology, and Design
Service-Oriented Architecture: Concepts, Technology, and Design
Seamless service composition (SeSCo) in pervasive environments
Proceedings of the first ACM international workshop on Multimedia service composition
Dynamic Service Composition in Pervasive Computing
IEEE Transactions on Parallel and Distributed Systems
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To provide dynamic services for users in a ubiquitous environment, an efficient context-aware service discovery mechanism is essential. Most of current researches are focused on composing services which satisfy pre-defined service specifications, by checking the availability of the devices and finding services that satisfy the user's preference. In this paper, we introduce a process for building a ubiquitous service ontology, and propose the specification to describe each service. With the service ontology, using the concept of service availability, not device availability, our method could discover the most appropriate service, and replace of it if the service requested is unavailable. The experimental result shows that our service ontology for home domain could reduce, on the average, more than 36% of the time required to discover alternative services compare to using just a flat list of services.