Transmitting CQI and ACK/NACK information via a physical uplink channel
A method and apparatus for uplink transmission over a non-contentious shared feedback channel are disclosed, wherein the parameters of the uplink transmission are determined by the parameters of a downlink transmission. A new uplink channel, called a physical shared uplink feedback channel (PSUFCH) is used for uplink transmission such as feedback information in response to a downlink transmission on a fast shared data channel. The content of the feedback information may be general, e.g. an ACK/NACK or a channel quality indicator (CQI). The PSUFCH is transmitted using power ramping that terminates upon reception of a downlink ACK (DLACK) from a Node-B. No ambiguity resolution is required due to the non-contentious and deterministic mapping of the uplink channel resources.
1. A wireless transmit/receive unit (WTRU) comprising:
a processor and a transmitter configured to for one or more transition time intervals:
select between transmission of: (1) acknowledgment/negative acknowledgment (ACK/NACK) information with channel quality information (CQI) and (2) the ACK/NACK information without the CQI, as a selection, wherein the selection between the transmission of the ACK/NACK information with the CQI and the transmission of the ACK/NACK information without the CQI is based on higher layer signaling;
generate a signal using one of: (1) the ACK/NACK information with the CQI or (2) the ACK/NACK information without the CQI in accordance with the selection; and
transmit the generated signal, to a network entity, (1) on physical uplink channel resources which carry data on condition that the ACK/NACK information with the CQI is the selection and data is being sent, and (2) on the physical uplink channel resources which do not carry data on condition that the ACK/NACK information without the CQI is the selection and no data is being sent.
2. The WTRU of claim 1 , wherein a physical uplink channel that includes the physical uplink channel resources is shared by a plurality of WTRUs.
3. The WTRU of claim 1 , wherein the transmitter is further configured to transmit a request for uplink bandwidth on a physical uplink channel that includes the physical uplink channel resources.
4. The WTRU of claim 1 , wherein transmissions on a physical uplink channel that includes the physical uplink channel resources have a varying number of bits.
5. The WTRU of claim 1 , further comprising a receiver configured to receive physical channel resource parameters used for transmissions on a physical uplink channel that includes the physical uplink channel resources.
6. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
for one or more transition time intervals:
selecting between transmission of: (1) acknowledgment/negative acknowledgment (ACK/NACK) information with channel quality information (CQI) and (2) the ACK/NACK information without the CQI, as a selection, wherein the selection between the transmission of the ACK/NACK information with the CQI and the transmission of the ACK/NACK information without the CQI is based on higher layer signaling;
generating a signal using one of: (1) the ACK/NACK information with the CQI or (2) the ACK/NACK information without the CQI in accordance with the selection; and
transmitting the generated signal, to a network entity, (1) on physical uplink channel resources which carry data on condition that the ACK/NACK information with the CQI is the selection and data is being sent, and (2) on the physical uplink channel resources which do not carry data on condition that the ACK/NACK information without the CQI is the selection and no data is being sent.
7. The method of claim 6 , further comprising sharing, by the WTRU, a physical uplink channel that includes the physical uplink channel resources with a plurality of other WTRUs.
8. The method of claim 6 , further comprising transmitting a request for uplink bandwidth on a physical uplink channel that includes the physical uplink channel resources.
9. The method of claim 6 , further comprising transmitting on a physical uplink channel that includes the physical uplink channel resources the generated signal having a varying number of bits.
10. The method of claim 6 , further comprising receiving physical channel resource parameters used for transmission on a physical uplink channel that includes the physical uplink channel resources.
11. The WTRU of claim 1 , wherein the processor is configured to, based on broadcasted information, set a format of a physical uplink channel that includes the physical uplink channel resources to a selected one of a plurality of formats such that a number of bits for transmission over the physical uplink channel varies based on the selected one of the plurality of formats.
12. The method of claim 6 , further comprising setting, based on broadcasted information, a format of a physical uplink channel that includes the physical uplink channel resources to a selected one of a plurality of formats such that a number of bits for transmission over a physical uplink channel varies based on the selected one of the plurality of formats.