Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1997-12-23
2000-02-29
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342387, 455456, G01S 302, G01S 124
Patent
active
060314907
ABSTRACT:
The disclosure describes a novel Time Difference of Arrival (TDOA) method and system for determining the position of a first mobile radio terminal within an associated mobile radio system, which is based on Time of Arrival (TOA) measurements, including a plurality of radio base stations, measuring devices, network controller, and service node. The measuring devices are synchronized in otherwise unsynchronized radio base stations. The measuring devices measure TOA on demand and (optionally) Direction of Arrival (DOA), on a digital uplink time slot or on digital information on an analog uplink traffic channel in one or more radio base stations. The TOA and DOA information and the traffic channel number are reported to a Mobile Services Switching Center, which obtains the first mobile terminal's identity from the traffic channel number and sends the terminal identity and TOA and DOA measurement information to a Service Node. The Service Node calculates the position of the first mobile radio terminal using the TOA information (supplemented by the DOA information when available). A second mobile radio terminal is colocated on a mobile platform (auto, emergency vehicle, etc.) with one of the radio base stations, which can be moved into relatively close proximity with the first mobile radio terminal. Consequently, by moving one of the radio base stations close to the region of interest (near the first mobile radio terminal), the position determination accuracy is significantly improved.
REFERENCES:
patent: 5317323 (1994-05-01), Kennedy et al.
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5512908 (1996-04-01), Herrick
patent: 5613205 (1997-03-01), Dufour
patent: 5615409 (1997-03-01), Forssen et al.
patent: 5706014 (1998-01-01), Abbasi
patent: 5890068 (1999-03-01), Fattouche et al.
Ulf Forssen et al., "Adaptive Antenna Arrays for GSM900/DCS1800," Proceedings of IEEE Vehicular Technology Conference, pp. 605-609 (Mar. 1994).
T.S. Rappaport et al., "Position Location Using Wireless Communications on Highways of the Future," IEEE Communications Magazine, pp. 33-41 (Oct. 1996).
Berg Jan-Erik
Forssen Ulf Goran
Ghisler Walter
Issing Gregory C.
Telefonaktiebolaget L M Ericsson
LandOfFree
Method and system for determining the position of mobile radio t does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for determining the position of mobile radio t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for determining the position of mobile radio t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-687099