The active badge location system
ACM Transactions on Information Systems (TOIS)
Computer networks (3rd ed.)
Cyberguide: a mobile context-aware tour guide
Wireless Networks - Special issue: mobile computing and networking: selected papers from MobiCom '96
Experiences of developing and deploying a context-aware tourist guide: the GUIDE project
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
A Survey of Context-Aware Mobile Computing Research
A Survey of Context-Aware Mobile Computing Research
Semantic Web in the Context Broker Architecture
PERCOM '04 Proceedings of the Second IEEE International Conference on Pervasive Computing and Communications (PerCom'04)
A service-oriented middleware for building context-aware services
Journal of Network and Computer Applications
Managing Context Information in Mobile Devices
IEEE Pervasive Computing
Human-Computer Interaction
Towards realizing global scalability in context-aware systems
LoCA'05 Proceedings of the First international conference on Location- and Context-Awareness
NooSphere: an activity-centric infrastructure for distributed interaction
Proceedings of the 12th International Conference on Mobile and Ubiquitous Multimedia
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In this paper, we propose a context framework reference model that aims at supporting distributed context aggregation, processing, provision and usage in ubiquitous computing environments. Based on this reference model, we introduce our design of GlobeCon, a scalable context management framework that can be embedded into context aware systems operating in local as well as wide area networks. One of the key aspects of GlobeCon is that it aggregates context information from largely distributed, heterogeneous and disparate sources in a hierarchical manner and presents context aware systems with a unified context access interface. GlobeCon is scalable in numerical, geographical and administrative dimensions, which is achieved by three means: (i) organizing context aggregation hierarchically, (ii) effectively distributing the load of context collection and context processing (i.e., interpreting and reasoning) among local context managers, and (iii) providing a dynamic federation of the distributed directory servers.