Method for locating a subscriber unit that is in close proximity

Details Method for locating a subscriber unit that is in close proximity Method for locating a subscriber unit that is in close proximity

1994-05-31

1996-02-20

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 542, H04Q 728

Patent

active

054936969

ABSTRACT:
In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units, a requesting subscriber unit can locate a neighboring subscriber unit in the following manner. Each of the plurality of subscriber units registers with the central controller. The central controller stores registration information in a database. When the requesting subscriber unit transmits a request for a subscriber identification of a neighboring subscriber unit, the central controller determines whether the neighboring subscriber unit exists. When the neighboring subscriber unit exists, the central controller transmits the subscriber identification of the neighboring subscriber unit to the requesting subscriber unit.

REFERENCES:
patent: 4112257 (1978-09-01), Frost
patent: 5313652 (1994-05-01), Rozenstrauch et al.
patent: 5369783 (1994-11-01), Childress et al.
patent: 5396644 (1995-03-01), Tzidon et al.

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