Handoff control with a pilot used in a cell of a neighboring cell in a CDMA mobile communication network on a service frequency of the neighboring cell
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United States of America Patent
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Nov 16, 1999
Grant Date -
N/A
app pub date -
Apr 10, 1997
filing date -
Apr 10, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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