Sending and reducing uplink feedback signaling for wireless transmission of data
A wireless transmit/receive unit includes at least one processor that receives a high speed physical downlink shared channel, and in response, transmits at least one random access channel preamble followed by ACK/NACK and channel quality indicator (CQI) information. The at least one random access channel preamble is selected from a set of random access preambles reserved for the ACK/NACK and CQI information.
1. A method implemented in a wireless transmit/receive unit (WTRU), the method comprising:
receiving, on a multimedia broadcast multicast service (MBMS) control channel (MCCH), a request for MBMS feedback, wherein the request includes an indication per MBMS service;
sending a preamble in a random access channel (RACH), the sent preamble indicating a request for an uplink shared channel allocation;
receiving the uplink shared channel allocation; and
sending the MBMS feedback on the uplink shared channel.
2. The method as in claim 1 , wherein the preamble is derived from a Zadoff-Chu sequence.
3. The method as in claim 1 , wherein the WTRU is in an LTE_Active state and the RACH is a synchronized.
4. The method as in claim 1 , wherein the WTRU is in an LTE_Active state or an LTE_Idle state and the RACH is non-synchronized.
5. A wireless transmit/receive unit (WTRU) in a wireless communication system that supports multimedia broadcast multicast service (MBMS), the WTRU comprising:
a transceiver operatively coupled to a processor;
the transceiver configured to receive, on an MBMS control channel (MCCH), a request for MBMS feedback, wherein the request includes an indication per MBMS service;
the transceiver configured to send a preamble in a random access channel (RACH), wherein the sent preamble indicates a request for an uplink shared channel allocation;
the transceiver is further configured to receive the uplink shared channel allocation; and
the transceiver is further configured to send the MBMS feedback on the uplink shared channel.
6. The WTRU of claim 5 , wherein the preamble is derived from a Zadoff-Chu sequence.
7. The WTRU as in claim 5 , wherein the WTRU is in an LTE_Active state and the RACH is synchronized.
8. The WTRU of claim 5 , wherein the WTRU is in an LTE_Active state or an LTE_Idle state and the RACH is non-synchronized.
9. The method of claim 1 , wherein the MBMS feedback is for counting.
10. The method of claim 1 , wherein the request for MBMS feedback includes a request for MBMS feedback on a first MBMS service and is received by a plurality of WTRUs, wherein only a subset of the plurality of WTRUs respond to the request for MBMS feedback on the first MBMS service.
11. The method of claim 1 , wherein non-MBMS feedback information is sent with the MBMS feedback information sent on the uplink shared channel.
12. The WTRU of claim 5 , wherein the MBMS feedback is for counting.
13. The WTRU of claim 5 , wherein the request for MBMS feedback includes a request for MBMS feedback on a first MBMS service and is received by a plurality of WTRUs, wherein only a subset of the plurality of WTRUs respond to the request for MBMS feedback on the first MBMS service.
14. The WTRU of claim 5 , wherein the transceiver is configured to send non-MBMS feedback information with the MBMS feedback information sent on the uplink shared channel.