Reliability detection of channel quality indicator (CQI) and application to outer loop power control
AssigneeInterDigital Technology Corporation
InventorsMarian Rudolf, Stephen G. Dick, James M. Miller
Life of this patent
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Abstract
A method for performing outer loop power control in wireless communications is disclosed. A channel quality indicator (CQI) message is transmitted by a wireless transmit/receive unit (WTRU). The WTRU receives a power control command, the power control command being derived by: decoding the CQI message; computing a decision metric value for each symbol in the CQI message; determining whether the CQI message is erroneous; and counting a number of erroneous CQI messages, wherein the power control command is based on whether the number of erroneous CQI messages exceeds a threshold. An uplink transmission power of the WTRU is adjusted based on the power control command.
Claims14
A method for performing outer loop power control in wireless communications, comprising:
- transmitting a channel quality indicator (CQI) message by a wireless transmit/receive unit (WTRU);
- receiving a power control command, the power control command being derived by:
- decoding the CQI message;
- computing a decision metric value for each symbol in the CQI message;
- determining whether the CQI message is erroneous;
- and
- counting a number of erroneous CQI messages, wherein the power control command is based on whether the number of erroneous CQI messages exceeds a threshold;
- and
- adjusting an uplink transmission power of the WTRU based on the power control command.
A wireless transmit/receive unit (WTRU) configured to perform outer loop power control, comprising:
- a transmitter configured to transmit a channel quality indicator (CQI) message;
- a receiver configured to receive a power control command, the power control command being derived by:
- decoding the CQI message;
- computing a decision metric value for each symbol in the CQI message;
- determining whether the CQI message is erroneous;
- and
- counting a number of erroneous CQI messages, wherein the power control command is based on whether the number of erroneous CQI messages exceeds a threshold;
- and
- a transmission power adjusting device configured to adjust an uplink transmission power of the WTRU based on the power control command.
Dependencies are inferred from the claim text.