Method and system for locating a mobile station

Details Method and system for locating a mobile station Method and system for locating a mobile station

1998-01-30

2000-08-22

Eisenzopf, Reinhard J.

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455 676, 455422, G01S 302, H04B 700

Patent

active

061085561

ABSTRACT:
This invention relates to a mobile station locating method for locating a mobile station based on a mobile communications system. Radio zones of base stations are dissected into a plurality of search areas (grid sections). A positional relationship between base stations and a concerned search area is defined by mutual time differences in the radio wave propagation between them. The base stations transmit their characteristic signals. Time differences in the propagation of the characteristic signals are caused between transmission of the characteristic signals at respective base stations and reception at a mobile station. Mutual differences in their propagation times are used to identify a search area where the mobile station is present. Thus, the position of the mobile station can be identified by an area not by a point.

REFERENCES:
patent: 5293645 (1994-03-01), Sood
patent: 5943014 (1999-08-01), Gilhousen

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