Method and apparatus for supervising transmit power in a high data rate system
First Claim
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1. In a wireless communication system, a method for controlling transmission power comprising the steps of:
- measuring a set of characteristics of a received signal;
generating one or more data rate control (DRC) values based on the set of characteristics; and
turning off a transmitter based on the one or more DRC values.
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Abstract
A method of supervising on the forward link in a high data rate system is disclosed, wherein a base station transmits to an access terminal on a forward traffic channel only when the base station has data to send to the access terminal. Each access terminal generates periodic data rate measurements based on the received forward link signal. Each access terminal then minimizes the period in which it transmits on the reverse link without being power-controlled by turning off its transmitter based on the data rate measurements.
58 Citations
17 Claims
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1. In a wireless communication system, a method for controlling transmission power comprising the steps of:
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measuring a set of characteristics of a received signal;
generating one or more data rate control (DRC) values based on the set of characteristics; and
turning off a transmitter based on the one or more DRC values. - View Dependent Claims (2, 3, 4, 5, 6, 7)
measuring a carrier-to-interference ratio of the received signal.
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3. The method of claim 1 wherein said step of turning off a transmitter further comprises the sub-steps of:
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determining the length of time during which none of the generated DRC values exceeded a rate of zero; and
turning off the transmitter when the length of time is greater than or equal to a predetermined period.
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4. The method of claim 3 wherein said predetermined period is approximately 240 milliseconds.
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5. The method of claim 1 further comprising the steps of:
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determining the length of time during which none of the generated DRC values indicated a rate of zero; and
turning on the transmitter when the length of time is greater than or equal to a predetermined period.
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6. The method of claim 5 wherein said predetermined period is approximately 13 and one third milliseconds.
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7. The method of claim 5 wherein said predetermined period is approximately 26 and two thirds milliseconds.
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8. A wireless access terminal apparatus comprising:
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a transmitter for amplifying and transmitting a transmit signal at a transmit power level;
a demodulator for demodulating a downconverted signal and generating a set of measurements of signal characteristics based on the downconverted signal; and
a control processor for evaluating the measurements, generating one or more data rate control (DRC) values based on the set of characteristics, and setting the transmit power level to approximately zero based on the one or more DRC values. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A wireless access terminal apparatus comprising:
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means for measuring a set of characteristics of a received signal; and
means for generating one or more data rate control (DRC) values based on the set of characteristics and turning off a transmitter based on the one or more DRC values. - View Dependent Claims (16, 17)
means for determining the length of time during which none of the generated DRC values exceeded a rate of zero; and
means for turning off the transmitter when the length of time is greater than or equal to a predetermined period.
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Specification