Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-03-28
2000-05-09
Bost, Dwayne D.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455440, 455456, 455423, H04Q 720
Patent
active
060615656
ABSTRACT:
In order to locate the position of a mobile station of a mobile radio system, the distance of the mobile station from a base transceiver station is determined, or the distances of the mobile station from at least two base transceiver stations are determined and the position is found by triangulation. In a GSM-type system, there is a predetermined known response delay between a particular signal received by the mobile station from the base transceiver station and a particular response transmitted from the mobile station to the base transceiver station; the distances can therefore be determined from the response delay and a measured period between transmission of the particular signal and reception of the particular response. In a GSM-type system, the mobile station transmits messages indicating the signal strengths of the base transceiver stations it is receiving, and on that basis the system allocates one of the base transceiver stations to the mobile station; in order to measure the distance between the mobile station and at least one other base transceiver station, the messages are modified in order to force a handover from one base transceiver station to another. In a CDMA-type system, the "soft hand-off" feature can be used to determine the distance to two or more BTSs at the same time.
REFERENCES:
patent: 5128925 (1992-07-01), Dornstetter et al.
patent: 5214789 (1993-05-01), George
patent: 5218367 (1993-06-01), Sheffer et al.
patent: 5267261 (1993-11-01), Blakeney, II et al.
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5394158 (1995-02-01), Chia
patent: 5432841 (1995-07-01), Rimer
patent: 5483669 (1996-01-01), Barnett et al.
patent: 5499386 (1996-03-01), Karlsson
patent: 5508708 (1996-04-01), Ghosh et al.
patent: 5513246 (1996-04-01), Jonsson et al.
patent: 5542100 (1996-07-01), Hatakeyama
patent: 5546445 (1996-08-01), Dennison et al.
patent: 5550914 (1996-08-01), Clarke
patent: 5551058 (1996-08-01), Hutcheson et al.
patent: 5613205 (1997-03-01), Dufour
patent: 5625876 (1997-04-01), Gilhousen et al.
patent: 5629710 (1997-05-01), Sawada
patent: 5657487 (1997-08-01), Doner
patent: 5666662 (1997-09-01), Shibuya
patent: 5732354 (1998-03-01), MacDonald
patent: 5844522 (1998-12-01), Sheffer et al.
Mobile Station Locating in GSM, by M. Silventoinen & T. Rantalainen, Proc. of 1995 Wireless Communication System Symposium, Long Island, NY, 28-8 Nov. 1995, pp. 53-59.
Anytime, anywhere . . . Big Brother is watching you, by M. Silventoinen & T. Rantalainen, Mobile Europe, Sep. 1995, pp. 43-50.
Bonner David
Innes Gordon Dingwall
Bost Dwayne D.
Hewlett--Packard Company
Vuong Quochien B.
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