COCOA : ConversationBased Service Composition for Pervasive Computing Environments

Due to the large success of wireless networks and handheld devices, the pervasive computing paradigm is becoming a reality. One of the most challenging objectives to be achieved in pervasive computing environments is to assist users in realizing tasks anytime, anywhere, on the fly, by composing functionalities provided by the networked services of the pervasive computing environment. Towards this goal, we present COCOA, a conversation-based service composition middleware support for the dynamic composition of networked services in pervasive computing environments. Both networked services of the pervasive computing environment and user tasks are modeled as conversations using OWL-S. The distinctive feature of COCOA is then, the ability of integrating on the fly the conversations of networked services to realize the conversation of the user task. Thereby, COCOA allows the dynamic realization of user tasks according to the specifics of the pervasive computing environment in terms of available services and by enforcing valid service consumption