RELIABILITY DETECTION OF CHANNEL QUALITY INDICATOR CQI AND APPLICATION TO OUTER LOOP POWER CONTROL

摘要

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 (106); COMPUTING A DECISION METRIC VALUE (108) FOR EACH SYMBOL IN THE CQI MESSAGE; DETERMINING WHETHER THE CQI MESSAGE IS ERRONEOUS (126): 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 (124). AN UPLINK TRANSMISSION POWER OF THE WTRU IS ADJUSTED (128) BASED ON THE POWER CONTROL COMMAND.