Abstract
A workflow model has been successively applied to traditional computing environments such as business processes for service automation. Recently, there are many studies that have tried to adopt workflows to ubiquitous computing. A service in the ubiquitous computing environments must be executed according to a user's situation information. However existing workflow systems have not yet included functions enough to support context-aware services for ubiquitous computing. In this paper, we propose a new context- aware workflow language and system for ubiquitous computing environments. The suggested language can specify context information on the transition constraints of a workflow, and support various workflow functions and adaptive services. And the proposed system can offer context-aware services according to user's service demand or situation information. We verify the efficiency of the suggested system, through comparison experiments with existing workflow systems such as FollowMe and uFlow.
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