Method and apparatus for sending and receiving channel quality indicators (CQIs)
A method and apparatus for sending and receiving channel quality indicators (CQIs) is disclosed. A CQI may be periodically sent or received. A CQI may also be sent or received upon request by a network.
1. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to monitor for downlink control information on a downlink control channel;
the processor configured to decode information in a transmission on the downlink control channel;
the processor configured to determine that a Node-B is requesting the WTRU to send a channel quality indicator (CQI) based on a triggering criteria associated with the transmission on the downlink control channel; and
the processor configured to send the CQI to the Node-B via a shared uplink channel.
2. The WTRU of claim 1 , wherein the information comprises an identifier of the WTRU, and wherein the identifier is a radio network temporary identifier (RNTI).
3. The WTRU of claim 1 , wherein the processor configured to periodically send CQIs via the shared uplink channel.
4. The WTRU of claim 3 , wherein the processor is configured to identify periodic intervals for the CQIs that are sent periodically.
5. The WTRU of claim 1 , wherein the processor is configured to send, to the Node-B, acknowledgements and negative acknowledgements via the shared uplink channel.
6. The WTRU of claim 1 , wherein the downlink control channel is a shared channel.
7. The WTRU of claim 1 , wherein the triggering criteria is one of a trigger or a poll.
8. The WTRU of claim 1 , wherein the processor is configured to select the CQI based on a target block error rate (BLER).
9. The WTRU of claim 1 , wherein the CQI is an index value.
10. The WTRU of claim 1 , wherein the CQI is a relative value to a previously sent CQI.
11. The WTRU of claim 1 , wherein the processor is configured to send the CQI at a physical layer.
12. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
monitoring for downlink control information on a downlink control channel;
decoding, by the WTRU, information in a transmission on the downlink control channel;
determining, by the WTRU, that a Node-B is requesting the WTRU to send a channel quality indicator (CQI) based on a triggering criteria associated with the transmission on the downlink control channel; and
sending, by the WTRU, the CQI to the Node-B via a shared uplink channel.
13. The method of claim 12 , wherein the information comprises an identifier of the WTRU, and wherein the identifier is a radio network temporary identifier (RNTI).
14. The method of claim 12 , further comprising periodically sending CQIs via the shared uplink channel.
15. The method of claim 14 , further comprising identifying periodic intervals for the CQIs that are sent periodically.
16. The method of claim 12 , further comprising sending, to the Node-B, acknowledgements and negative acknowledgements via the shared uplink channel.
17. The method of claim 12 , wherein the downlink control channel is a shared channel.
18. The method of claim 12 , wherein the triggering criteria is one of a trigger or a poll.
19. The method of claim 12 , further comprising selecting the CQI based on a target block error rate (BLER).
20. The method of claim 12 , wherein the CQI is an index value.
21. The method of claim 12 , wherein the CQI is a relative value to a previously sent CQI.
22. The method of claim 12 , further comprising sending the CQI at a physical layer.