Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Patent
1995-09-22
1998-06-02
Chin, Wellington
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
370350, 370508, 375356, 455502, H04J 306
Patent
active
057611980
ABSTRACT:
In a method of controlling the transmission of a downgoing control signal, a mobile terminal detects the presence of radio wave of a downgoing control signal in each time slot in response to an inquiry signal received from a base station. The mobile terminal generates an answer signal indicating the time positions of radio waves received within a predetermined interval, and transmits the answer signal to the base apparatus. The base apparatus, receiving the radio condition answer signal, detects time differences between the downgoing control signal sent by the base apparatus itself and other downgoing control signals sent by other base apparatuses. If at least one time difference becomes lower than a predetermined threshold, the base apparatus changes the transmission timing of the downgoing control signal such that the time difference becomes larger than the threshold.
REFERENCES:
patent: 5396496 (1995-03-01), Ito et al.
patent: 5430731 (1995-07-01), Umemoto et al.
patent: 5448570 (1995-09-01), Toda et al.
patent: 5537685 (1996-07-01), Matsuno
Chin Wellington
NEC Corporation
Vu Huy D.
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