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In recent years, the ubiquitous computing system attracts people's attention as the system to provide useful services (e.g., automatic temperature control) without explicit operations by users. There are many existing methods for controlling appliances according to the user's preference by describing each user's preference and rules. However, these methods cannot be applied to public spaces where...
Ubiquitous and accurate indoor positioning represents a key capability of an infrastructure that enables indoor location-based services. At the same time, such positioning has yet to be achieved. Much research uses commercial, off-the-shelf 802.11 (Wi-Fi) hardware for indoor positioning. In particular, the dominant fingerprinting technique uses a database (called a radio map) of manually collected...
This paper presents a distributed fermat-point range estimation strategy, which is important in the moving sensor localization applications. The fermat-point is defined as a point which minimizes the sum of distances from three sensors inside a triangle. This point is indeed at the trianglepsilas center of gravity. We solve the problems of large errors and poor performance in the bounding box algorithm...
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