GPS Tracking Location-Based Service Using Wristwatch Geozigbee Sensors

Alison Brown, Jacob Griesbach, Bruce Bockius, and Terry Boult

Abstract:	The GeoZigBee sensor is a low power GPS wristwatch tracking device that is being developed by NAVSYS Corporation under contract to the US Army. The GeoZigBee utilizes a client/server approach, where the wristwatch client sends raw GPS data to the GeoZigBee Server via a wireless ZigBee® protocol data link. The GeoZigBee wristwatch device includes a low power TIDGET® sensor, flash memory, and a ZigBee wireless data link. The design of the device was selected to minimize the power drain to allow operation for extended periods of time. The TIDGET sensor operates by taking brief snapshots of GPS data when activated. These snapshots are stored in the flash memory and forwarded to the GeoZigBee Server through the ZigBee data link when the device is in range of a ZigBee Gateway. The GeoZigBee Server integrates a Software Defined Radio navigational processor with an Oracle Application Server. The function of the server is to receive and store the wristwatch data, process the incoming data to compute navigation solutions, and store the results. The Application Server includes a custom web portal that provides location-based services (LBS) to users through a web interface to view, filter, and display the GeoZigBee tracking results. This paper covers the design of the GeoZigBee system architecture including the wristwatch sensor and the GeoZigBee Server, and presents GPS tracking results. The Web Portal and LBS offered by the Portal for GPS tracking are described with a discussion on the use of open-architecture Open Geospatial Consortium (OGC) standards for sharing and viewing the LBS data through the web as a mapping overlay.
Published in:	Proceedings of the 2007 National Technical Meeting of The Institute of Navigation January 22 - 24, 2007 The Catamaran Resort Hotel San Diego, CA
Pages:	123 - 132
Cite this article:	Brown, Alison, Griesbach, Jacob, Bockius, Bruce, Boult, Terry, "GPS Tracking Location-Based Service Using Wristwatch Geozigbee Sensors," Proceedings of the 2007 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2007, pp. 123-132.
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