Handoff control with a pilot used in a cell of a neighboring cel

Details Handoff control with a pilot used in a cell of a neighboring cel Handoff control with a pilot used in a cell of a neighboring cel

1997-04-10

1999-11-16

Kizou, Hassan

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370335, 375205, 445437, 445442, H04Q 7212, C12N 506, H04B 1500, A63H 1700

Patent

active

059870133

ABSTRACT:
To expedite handoff control while a mobile unit moves between first and neighboring second cells, A and B frequencies are assigned for traffic communication to a first base station and only B frequency is assigned for traffic communication to a second base station, and both of the base stations are connected to a control station, where the first base station is assigned to the first cell and the second base station is assigned to the second cell. The mobile unit has been assigned A frequency in the first base station, and the second base station is accompanied by a pilot transmitting device for transmitting only a pilot signal on the A frequency. As soon as it is informed of deterioration in a field intensity of the frequency at the mobile unit together with pilot information specific to the pilot signal from the first base station, the control station makes a determination that the mobile unit is approaching the second base station, and deals with a handoff from the A frequency to the B frequency.

REFERENCES:
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5267261 (1993-11-01), Blakeney, II et al.
patent: 5295153 (1994-03-01), Gudmundson
patent: 5303286 (1994-04-01), Wiedeman
patent: 5434853 (1995-07-01), Hemmady et al.
patent: 5548808 (1996-08-01), Bruckert et al.
patent: 5574983 (1996-11-01), Douzono et al.

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