Method and apparatus for adjusting a signal-to-interference threshold in a closed loop power control communications system
First Claim
1. A method for adjusting a threshold in a power control system, comprising:
- determining past performance of the power control system, wherein the determining past performance includes determining a power control command pattern of a control loop;
adjusting the threshold in accordance with the determined past performance;
instructing a mobile station to increase its transmit power by sending to the mobile station a power up command when the power of a signal received from the mobile station is below the threshold; and
inhibiting adjustment of the threshold when a number of consecutive power up commands is greater than a pre-determined number.
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Accused Products
Abstract
A method and apparatus for dynamically adjusting the signal-to-interference ratio (SIR) threshold used to control signal transmission power in closed loop communication systems. The closed loop power control comprises an inner loop that provides up/down transmission power control commands to a transmitter based upon a comparison of the SIR for a received signal to the threshold SIR. The outer loop dynamically adjusts the threshold SIR using historic inner loop power control information. When it is detected that the inner loop is not acceptably performing power control, the target SIR is not changed, or may increased or decreased more or less than 0.5 dB or 0.5 dB/99, respectively.
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Citations
41 Claims
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1. A method for adjusting a threshold in a power control system, comprising:
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determining past performance of the power control system, wherein the determining past performance includes determining a power control command pattern of a control loop; adjusting the threshold in accordance with the determined past performance; instructing a mobile station to increase its transmit power by sending to the mobile station a power up command when the power of a signal received from the mobile station is below the threshold; and inhibiting adjustment of the threshold when a number of consecutive power up commands is greater than a pre-determined number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for adjusting a threshold in a power control system, comprising:
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a first power control processor to determine past performance of the power control system by determining a power control command pattern of a control loop; and a second power control processor, communicatively coupled to the first power control processor, the second power control processor to adjust the threshold in accordance with the determined past performance wherein the power control system increases a transmit power of a mobile station by sending to the mobile station a power up command when the power of a signal received from the mobile station is below the threshold; and wherein the second power control processor inhibits adjustment of the threshold when a number of consecutive power up commands is greater than a pre-determined number. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An apparatus for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising:
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means for determining past performance of the power control system, wherein the determining past performance includes determining a power control command pattern of a control loop; means for adjusting the threshold in accordance with the determined past performance; means for instructing a mobile station to increase its transmit power by sending to the mobile station a power up command when the power of a signal received from the mobile station is below the threshold; and means for inhibiting adjustment of the threshold when a number of consecutive power up commands is greater than a pre-determined number. - View Dependent Claims (30, 31, 32)
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33. A computer readable storage medium embodying computer executable instructions for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, the instructions comprising:
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determining past performance of the power control system, wherein the determining past performance includes determining a power control command pattern of a control loop; adjusting the threshold in accordance with the determined past performance; instructing a mobile station to increase its transmit power by sending to the mobile station a power up command when the power of a signal received from the mobile station is below the threshold; and inhibiting adjustment of the threshold when a number of consecutive power up commands is greater than a pre-determined number. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41)
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Specification