Power control in a wireless communication system
AssigneeQUALCOMM Incorporated
InventorsRashid Ahmed Akbar Attar, Donna Ghosh, Christopher Gerard Lott
Life of this patent
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Abstract
In a wireless communications system, a serving base station performs outer and closed power control for an overhead channel and a traffic channel for data, either of which can carry an acknowledgement (Ack) channel and Channel Quality Indicator (CQI) channel on an uplink from User Equipment (UE). In an exemplary aspect, data packet communication is implemented in 3GPP LTE Rel. 8 wherein the uplink has a Single Carrier Frequency Division Multiplex (SC-FDM) uplink waveform. The UE performs open loop power control by a determining transmit power spectral density value by using received energy per symbol for a reference signal.
Claims46
A method for receiving an uplink in a wireless communication system, the method comprising:
- receiving a channel quality feedback on an uplink from a user equipment on a determined one of an overhead channel and a traffic channel;
- determining a detection confidence value for the channel quality feedback;
- performing outer loop power control for the determined one of the overhead channel and traffic channel to maintain the detection confidence value at a target;
- and
- transmitting a command to the user equipment to adjust a transmit power of a selected one of the overhead channel and traffic channel that carries the channel quality feedback in accordance to performing outer loop power control.
A computer program product for receiving an uplink in a wireless communication system, the computer program product comprising:
- at least one computer readable storage medium storing computer executable instructions comprising:
- a first set of codes for receiving a channel quality feedback on an uplink from a user equipment on a determined one of an overhead channel and a traffic channel;
- a second set of codes for determining a detection confidence value for the channel quality feedback;
- a third set of codes for performing outer loop power control for the determined one of the overhead channel and traffic channel to maintain the detection confidence value at a target;
- and
- a fourth set of codes for transmitting a command to the user equipment to adjust a transmit power of a selected one of the overhead channel and traffic channel that carries the channel quality feedback in accordance to performing outer loop power control.
An apparatus for receiving an uplink in a wireless communication system, the apparatus comprising:
- means for receiving a channel quality feedback on an uplink from a user equipment on a determined one of an overhead channel and a traffic channel;
- means for determining a detection confidence value for the channel quality feedback;
- means for performing outer loop power control for the determined one of the overhead channel and traffic channel to maintain the detection confidence value at a target;
- and
- means for transmitting a command to the user equipment to adjust a transmit power of a selected one of the overhead channel and traffic channel that carries the channel quality feedback in accordance to performing outer loop power control.
An apparatus for receiving an uplink in a wireless communication system, the apparatus comprising:
- a receiver for receiving a channel quality feedback on an uplink from a user equipment on a determined one of an overhead channel and a traffic channel;
- a computing platform for determining a detection confidence value for the channel quality feedback and for performing outer loop power control for the determined one of the overhead channel and traffic channel to maintain the detection confidence value at a target;
- and
- a transmitter for transmitting a command to the user equipment to adjust a transmit power of a selected one of the overhead channel and traffic channel that carries the channel quality feedback in accordance to performing outer loop power control.
Dependencies are inferred from the claim text.