Telecommunications – Transmitter and receiver at separate stations
Patent
1995-03-31
1997-03-18
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 331, 455 334, 455 541, 455 561, H04Q 700, H04Q 900
Patent
active
056132050
ABSTRACT:
A mobile terminal locator for locating a mobile terminal in a cellular telecommunication system having a plurality of base stations and associated cells. The mobile terminal locator identifies a plurality of candidate handoff cells having sufficient signal strength to maintain a call with the mobile terminal, and forces sequential handoffs of the mobile terminal from its serving cell to the plurality of candidate handoff cells. The locator then measures signal strength and propagation delay between the mobile terminal and each base station associated with each of the plurality of candidate handoff cells and between the mobile terminal and the serving base station. Either the signal strength, the propagation delay, or both are then used to calculate a distance between the mobile terminal and each base station associated with each of the plurality of candidate handoff cells and between the mobile terminal and its serving base station. From the calculated distances, a plurality of arcs of possible locations of said mobile terminal are then defined, the arcs being centered on the serving base station and each base station associated with each of the plurality of candidate handoff cells. Finally, the mobile terminal locator calculates an intersection point of the plurality of arcs of possible locations, the intersection point defining the location of the mobile station. The locator may operate in cellular telecommunication systems with or without synchronized timing reference signals from the base stations.
REFERENCES:
patent: 5175867 (1992-12-01), Wejke et al.
patent: 5208756 (1993-05-01), Song
patent: 5293642 (1994-03-01), Lo
patent: 5293645 (1994-03-01), Sood
patent: 5327575 (1994-07-01), Menich et al.
patent: 5345448 (1994-09-01), Keskitalo
patent: 5369681 (1994-11-01), Boudreau et al.
Arthur Gertrude
Eisenzopf Reinhard J.
Telefonaktiebolaget LM Ericsson
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