Apparatus for acquiring the position of a mobile station

Details Apparatus for acquiring the position of a mobile station Apparatus for acquiring the position of a mobile station

1995-01-10

1997-05-13

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

342387, 379 60, G01S 302, G01S 124, H04M 1100

Patent

active

056297106

ABSTRACT:
A position acquiring apparatus for specifying the spatial position of a mobile station is provided for a mobile communication system composed of a plurality of base stations fixed on the ground and a mobile station moving on the ground or water or in the air, whereby hand-off control can be executed at proper switching timing or diversity reception control requiring short processing time can be carried out. A receiving unit of the mobile station receives signals transmitted from the base stations, and an extracting unit extracts a predetermined synchronizing signal and an identifying signal contained in each transmitted signal. A time difference detecting unit monitors the timing at which each of the predetermined synchronizing signals is extracted by the extracting unit, to detect a time difference between each extraction timing and predetermined timing. A base station coordinates detecting unit detects position coordinate values of each of the base stations, based on the identifying signals. Based on the time differences and the position coordinate values thus obtained, a mobile station coordinates calculating unit calculates position coordinates of the mobile station.

REFERENCES:
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patent: 5235633 (1993-08-01), Dennison et al.
patent: 5293645 (1994-03-01), Sood
patent: 5317321 (1994-05-01), Sass
patent: 5442805 (1995-08-01), Sagers et al.
patent: 5457810 (1995-10-01), Ivanov et al.
Turin, "Simulation of Urban Vehicle Monitoring Systems", IEEE Trans. on Vehicular Technology, vol. VT-21, No. 1, Feb. 1972.

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