A self locating device that uses GSM signals associated with GSM digital telephone base stations to determine its current location. The device uses GSM common channel signals to determine observed time differences between a local base station and at least two additional base stations. It also uses the common channel signals to identify these base stations and to match the identifications to geographical locations. It further uses a geolocation algorithm to determine the location of the device relative to the base stations, and uses the geographic location data to determine the current geographic location of the device.
申请公布号
WO02096125(A1)
申请公布日期
2002.11.28
申请号
WO2002US15798
申请日期
2002.05.17
申请人
SOUTHWEST RESEARCH INSTITUTE
发明人
JAECKLE, THOMAS, H.;JOHNSON, RICHARD, L.;KOETS, MICHAEL, A.;BUSHMAN, M., LAVARRE