Building Context-Aware Applications and Probe Space Infrastructure

In this paper, we describe an approach for building context-aware applications in the ubiquitous computing environment, where a huge number of sensors are embedded in our living space. The raw data from sensors can be used as low level context information, and also be used to infer higher level context information. We present several ubiquitous computing applications using these context information, such as a context-aware service platform called "Synapse" and a real-world oriented monster collection game called "Ubiquitous Monster". In addition, we show a probe space infrastructure which we have built in Akihabara for efficiently implementing and evaluating context-aware services