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 periodically send, via an uplink channel, channel quality indicators (CQIs);
the processor further configured to decode a transmission on a downlink control channel, the transmission being associated with a radio network temporary identifier (RNTI) of the WTRU;
the processor further configured to determine that a wireless network is requesting the WTRU to send a CQI based on a triggering criteria associated with the transmission on the downlink control channel; and
the processor further configured to send the CQI to the wireless network.
2. The WTRU of claim 1 , wherein the uplink channel is one of a shared channel, a common channel, or a random access channel (RACH).
3. The WTRU of claim 1 , wherein the processor is further configured to send, to the wireless network, acknowledgements and negative acknowledgements via the uplink channel.
4. The WTRU of claim 1 , wherein the WTRU is further configured to send the CQI via the uplink channel.
5. The WTRU of claim 1 , wherein the downlink control channel is a shared channel.
6. The WTRU of claim 1 , wherein the downlink control channel is a high speed shared control channel (HS-SCCH).
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 detect or receive the RNTI on the downlink control channel.
9. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
periodically sending, by the WTRU via an uplink channel, channel quality indicators (CQIs);
decoding, by the WTRU, a transmission on a downlink control channel, the transmission being associated with a radio network temporary identifier (RNTI) of the WTRU;
determining, by the WTRU, that a wireless network is requesting the WTRU to send a CQI based on a triggering criteria associated with the transmission on the downlink control channel; and
sending, by the WTRU, the CQI to the wireless network.
10. The method of claim 9 , wherein the uplink channel is one of a shared channel, a common channel, or a random access channel (RACH).
11. The method of claim 9 , further comprising:
sending, by the WTRU to the wireless network, acknowledgements and negative acknowledgements via the uplink channel.
12. The method of claim 9 , wherein the CQI is sent to the wireless network via the uplink channel.
13. The method of claim 9 , wherein the downlink control channel is a shared channel.
14. The method of claim 9 , wherein the downlink control channel is a high speed shared control channel (HS-SCCH).
15. The method of claim 9 , wherein the triggering criteria is one of a trigger or a poll.
16. The method of claim 9 , wherein the RNTI is detected or received by the WTRU on the downlink control channel.
17. A wireless network device comprising:
a processor configured to periodically receive, from a wireless transmit/receive unit (WTRU) via an uplink channel, channel quality indicators (CQIs);
the processor further configured to send, via a downlink channel, a transmission associated with a radio network temporary identifier (RNTI) of the WTRU, wherein the transmission is associated with triggering criteria that indicates a request for the WTRU to send a CQI; and
the processor further configured to receive the CQI from the WTRU.
18. The wireless network device of claim 17 , wherein the wireless network device is a Node B.
19. The wireless network device of claim 17 , wherein the uplink channel is one of a shared channel, a common channel, or a random access channel (RACH).
20. The wireless network device of claim 17 , wherein the processor is further configured to receive, from the WTRU, acknowledgements and negative acknowledgements via the uplink channel.
21. The wireless network device of claim 17 , wherein the wireless network device is further configured to receive the CQI via the uplink channel.
22. The wireless network device of claim 17 , wherein the downlink control channel is a shared channel.
23. The wireless network device of claim 17 , wherein the downlink control channel is a high speed shared control channel (HS-SCCH).
24. The wireless network device of claim 17 , wherein the triggering criteria is one of a trigger or a poll for the WTRU to send the CQI.
25. A method performed by a wireless network device, the method comprising:
periodically receiving, by the wireless network device from a wireless transmit/receive unit (WTRU), channel quality indicators (CQIs) via an uplink channel;
sending, by the wireless network device via a downlink control channel, a transmission associated with a radio network temporary identifier (RNTI) of the WTRU, wherein the transmission is associated with triggering criteria that indicates a request for the WTRU to send a CQI; and
receiving the CQI from the WTRU.
26. The method of claim 25 , wherein the wireless network device is a Node B.
27. The method of claim 25 , wherein the uplink channel is one of a shared channel, a common channel, or a random access channel (RACH).
28. The method of claim 25 , further comprising:
receiving, by the wireless network device from the WTRU, acknowledgements and negative acknowledgements via the uplink channel.
29. The method of claim 25 , wherein the CQI is received via the uplink channel.
30. The method of claim 25 , wherein the downlink control channel is a shared channel.
31. The method of claim 25 , wherein the downlink control channel is a high speed shared control channel (HS-SCCH).
32. The method of claim 25 , wherein the triggering criteria comprise one of a trigger or a poll for the WTRU to send the CQI.