Reliability detection of channel quality indicator (CQI) and application to outer loop power control
A method for determining a channel quality in wireless communications includes receiving a high speed shared control channel (HS-SICH) transmission. An expected number of HS-SICH transmissions and a number of unsuccessful HS-SICH transmissions are counted. The number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions. The expected number of HS-SICH transmissions and the number of unsuccessful HS-SICH transmissions over a fixed time period are periodically reported, whereby the reporting is an indication of the channel quality.
1. A method for determining a channel quality in wireless communications, comprising:
receiving a high speed shared control channel (HS-SICH) transmission;
counting an expected number of HS-SICH transmissions;
counting a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and
periodically reporting the expected number of HS-SICH transmissions and the number of unsuccessful HS-SICH transmissions over a fixed time period, whereby the reporting is an indication of the channel quality.
2. A base station configured to determine a channel quality, comprising:
a receiver configured to receive a high speed shared control channel (HS-SICH) transmission;
a counter configured to count an expected number of HS-SICH transmissions and a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and
a reporting device configured to periodically report the expected number of HS-SICH transmissions and the number of unsuccessful HS-SICH transmissions over a fixed time period, whereby the report is an indication of the channel quality.
3. A base station configured to determine a channel quality, comprising:
a receiver configured to receive a high speed shared control channel (HS-SICH) transmission;
a first counter configured to count an expected number of HS-SICH transmissions;
a second counter configured to count a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and
a reporting device configured to periodically report the values of said first counter and said second counter over a fixed time period, whereby the report is an indication of the channel quality.
4. A wireless transmit/receive unit (WTRU), comprising:
a transmitter configured to transmit a plurality of high speed shared control channel (HS-SICH) transmissions;
a receiver configured to receive a power control command, the power control command being derived by:
counting an expected number of HS-SICH transmissions;
counting a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and
comparing the counted values to a predetermined threshold; and
a transmission power adjusting device configured to adjust an uplink transmission power of the WTRU based on the power control command.