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Bluetooth-based Indoor Proximity Sensing for Nursing Context Awareness

By Futoshi Naya, Haruo Noma, Ren Ohmura and Kiyoshi Kogure


This paper proposes a Bluetooth-based indoor proximity detection method for nursing context awareness. We exploit proximity between Bluetooth devices attached to people and objects for estimating 1) room-level proximity of people and objects, and 2) mutual proximity between moving people and objects. We show that the proximity information exchanged between several devices can be updated at a rate of more than 1 Hz by effectively choosing the timing parameters of Bluetooth inquiry mechanism. Empirical results of evaluating the Receiver Signal Strength Indicator (RSSI) at various distances between devices are also shown. 1

Year: 2009
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