Power control avoiding outer loop wind-up
AssigneeQUALCOMM Incorporated
InventorsRichard Chi, Da-Shan Shiu, Nitin Kasturi, Parvathanathan Subrahmanya
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Abstract
Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.
Claims30
A method of power control comprising:
- calculating a target power level;
- detecting wind-up of the target power level;
- and
- modifying the target power level when wind-up is detected,
- wherein detecting wind-up comprises measuring closed-loop power control commands generated in response to the target power level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
A method of power control comprising:
- calculating a target power level;
- detecting wind-up of the target power level;
- and
- limiting the target power level to a received power level plus a pre-determined power margin;
- wherein detecting wind-up comprises measuring closed-loop power control commands generated in response to the target poewer level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
A wireless communication device, operable with a second wireless communication device to perform closed-loop power control, comprising:
- a wind-up detector for detecting wind-up of a target power level;
- and
- an outer power control loop for generating a target power level and modifying it in response to wind-up detection in the wind-up detector;
- wherein detecting wind-up comprises measuring closed-loop power control commands generated in response to the target power level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
A communication system comprising:
- a wind-up detector for detecting wind-up of a target power level;
- and
- an outer power control loop for generating a target power level and modifying it in response to wind-up detection in the wind-up detector,
- wherein detecting wind-up comprises measuring closed-loop power control commands generated in response to the target power level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
A wireless communication device comprising:
- means for calculating a target power level;
- means for detecting wind-up of the target power level;
- and
- means for modifying the target power level when wind-up is detected,
- wherein detecting wind-up comprises measuring closed-loop power control commands generated in response to the target power level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
A wireless communication device comprising:
- means for calculating a target power level;
- means for detecting wind-up of the target power level;
- and
- means for limiting the target power level to a received power level plus a pre-determined power margin;
- wherein detecting wind-up means comprises measuring closed-loop power control commands generated in response to the target power level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
Processor readable media operable to perform the following steps:
- calculating a target power level;
- detecting wind-up of the target power level;
- and
- modifying the target power level when wind-up is detected,
- wherein detecting wind-up comprises measuring closed-loop power control commands generated in response to the target power level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
Processor readable media operable to perform the following steps:
- calculating a target power level;
- detecting wind-up of the target power level;
- and
- limiting the target power level to a received power level plus a pre-determined power margin;
- wherein detecting wind-up comprises measuring closed-loop power control commands generated in response to the target power level over a pre-determined time interval and comparing the number of increase commands with a pre-determined threshold.
Dependencies are inferred from the claim text.