Deploying and evaluating a location-aware system
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Towards autonomous updating of world models in location-aware spaces
Personal and Ubiquitous Computing - Special Issue: Implications of the socio-physical contexts when interacting with mobile media
Maintaining a world model in a location-aware smart space
EuroSSC'06 Proceedings of the First European conference on Smart Sensing and Context
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Context-aware computing systems demand an accurateand up-to-date world model which computationally representsthe environment they oversee. Systems to date tend tohave small-scale implementations with hand-programmedworld models.In real environments, manual creation and maintenanceof such models is infeasible. This paper presents a novelmethod of using signals propagating in a multilaterationpositioning system to assist in creating and maintainingmodels of a dynamic world. It builds on a previous methodfor discovering objects in static environments.The methods are implemented and evaluated using areal positioning system. They are shown to build three-dimensionaloccupancy grids of indoor volumes, and havethe capability of modifying those grids as time proceeds andthe environment is reconfigured.