Reliability detection of channel quality indicator (CQI) and application to outer loop power control
A method for performing outer loop power control in wireless communications includes initializing a time interval clock to count down a predetermined time interval; receiving and decoding a channel quality indicator (CQI) message; computing a decision metric value for each symbol in the decoded CQI message; determining whether the CQI message is erroneous; counting a number of erroneous CQI messages; and signaling a wireless/transmit receive unit to adjust an uplink transmission power on a condition that the time interval clock has expired and the number of erroneous CQI messages exceeds a threshold.
1. A method comprising:
receiving control channel transmissions;
counting a number of erroneously received control channel transmissions during the time interval;
counting a number of hissed control channel transmissions during the time interval; and
reporting the number of erroneously received control channel transmission and the number of missed control channel transmissions.
2. The method of claim 1 , wherein the time interval is a fixed time interval.
3. The method of claim 1 , wherein the method is performed repeatedly.
4. The method of claim 1 , further comprising:
decoding the received control channel transmissions, the decoded control channel transmissions include one or more symbols; and
computing a decision metric value for each of the one or more symbols of the decoded control channel transmissions;
wherein whether a received control channel transmission is deemed erroneous is based on the decision metric values.
5. The method of claim 4 , wherein the control channel transmissions include channel quality index messages.
6. The method of claim 1 , wherein the control channel is a physical uplink control channel.
7. The method of claim 1 , wherein the control channel is a high speed dedicated control channel.
8. The method of claim 1 , wherein the method is performed by a base station and the control channel transmissions are received from a wireless transmit and receive unit.
9. An apparatus comprising:
a receiver configured to receive control channel transmissions;
a counter configured to count, during a first time interval, a number of erroneously received control channel transmissions and a number of missed control channel transmissions; and
a reporting device configured to report the number of erroneously received control channel transmissions and the number of missed control channel transmissions counted during the first time interval.
10. The apparatus of claim 9 , wherein the first time interval is a fixed time interval.
11. The apparatus of claim 9 , wherein the counter is further configured to count during a second time interval, a number of erroneously received control channel transmissions and a number of missed control channel transmissions, and wherein the reporting device is further configured to report the number of erroneously received control channel transmissions and the number of missed control channel transmissions counted during the second time interval.
12. The apparatus of claim 9 , further comprising:
a decoder configured to decode the received control channel transmissions, the decoded control channel transmissions include one or more symbols, and compute a decision metric value for each of the one or more symbols of the decoded control channel transmissions;
wherein whether a received control channel transmission is deemed erroneous is based on the decision metric values.
13. The apparatus of claim 9 , wherein the control channel transmissions include channel quality index messages.
14. The apparatus of claim 9 , wherein the control channel is a physical uplink control channel.
15. The apparatus of claim 9 , wherein the control channel is a high speed dedicated control channel.
16. The apparatus of claim 9 , wherein the apparatus is a base station and the control channel transmissions are received from a wireless transmit and receive unit.
17. An apparatus comprising:
a receiver configured to receive control channel transmissions;
a first counter configured to count a number of erroneously received control channel transmissions during a first time interval;
a second counter configured to count a number of missed control channel transmissions during the first time interval; and
a reporting device configured to report count values of the first counter and the second counter for the first time interval.
18. The apparatus of claim 17 , wherein the first time interval is a fixed time interval.
19. The apparatus of claim 17 , wherein the counters first counter is further configured to count a number of erroneously received control channel transmissions during a second time interval and the second counter is further configured to count a number of missed control channel transmissions during the second time interval, and wherein the reporting device is further configured to report count values of the first counter and the second counter for the second time interval.
20. The apparatus of claim 17 , further comprising:
a decoder configured to decode the received control channel transmissions, the decoded control channel transmissions include one or more symbols, and compute a decision metric value for each of the one or more symbols of the decoded control channel transmissions;
wherein whether a received control channel transmission is deemed erroneous or not is based on the decision metric values.