Method and apparatus for pre-transmission power control using lower rate for high rate communication
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United States of America Patent
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Dec 11, 2001
Issued Date -
N/A
app pub date -
Dec 14, 1999
filing date -
Jul 1, 1997
priority date (Note) -
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Abstract
The present invention employs a method and apparatus for providing improved power control when changing the rate at which data is sent in a communications system. When data arrives at the transmitter for transmission at a high rate, power control feedback is changed from a slow mode (with a low bandwidth feedback channel) to a fast mode (with a high bandwidth feedback channel). This control changes even before the data is transmitted at the high rate. Once the power level is accurately estimated for data transmission at the high rate, then data transmission begins at the high rate.
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