Ambient systems are modeled by entities, activities and contexts, where entities exist in contexts and engage in activities. A context supports a dynamic collection of entities by services and offers awareness information about the entities. Activities also exist in contexts and model ongoing collaborations between entities. Activities and local contexts also obtain awareness information from the context about the dynamic collection of entities. Similarly activities, local contexts and entities are offered awareness information about activities and local contexts.
Context-aware Systems and Applications: Second International Conference, Iccasa 2013, Phu Quoc Island, Vietnam, November 25-26, 2013, Revised Selected Papers, 2013, p. 144-156
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Lecture Notes of the Institute for Computer Sciences, Social-informatics and Telecommunications Engineering