The active badge location system
ACM Transactions on Information Systems (TOIS)
The anatomy of a context-aware application
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
The active process interaction with its environment
Computer Networks: The International Journal of Computer and Telecommunications Networking - Active networks and services
IDMaps: a global internet host distance estimation service
IEEE/ACM Transactions on Networking (TON)
ICDE '96 Proceedings of the Twelfth International Conference on Data Engineering
A Survey of Context-Aware Mobile Computing Research
A Survey of Context-Aware Mobile Computing Research
Customizing mobile applications
MLCS Mobile & Location-Independent Computing Symposium on Mobile & Location-Independent Computing Symposium
Active networks for efficient distributed network management
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
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In order to allow fast and efficient development, deployment, and management of Context Aware Services (CASs), a global system that allows the services to gain access to context information should be created, maintained, and managed. In this paper, we study the requirements of such a context distribution system. We deal with the architectural decisions regarding the definition of context items, the way context information becomes available to the CASs and the algorithmic aspects of disseminating this information. Our results indicate that a modular approach in which context information is provided in many network locations by brokers through an open simple API is both powerful enough to provide the required context information, and simple enough to be easily implemented.