Uplink feedback methods for operating with a large number of carriers

A method for uplink feedback for operating with a plurality of carriers in a wireless transmit/receive unit (WTRU), the method comprising:

• receiving, by the WTRU, a plurality of transport blocks over a set of a plurality of configured carriers;
• generating, by the WTRU, hybrid automatic repeat request (HARQ) acknowledgment (ACK) feedback for the plurality of transport blocks and channel state information (CSI) feedback for at least one of the plurality of configured carriers;
• generating, by the WTRU, a feedback message that includes a number of HARQ-ACK feedback bits to use for the HARQ-ACK feedback and a number of CSI feedback bits to use for the CSI feedback;
• determining, by the WTRU, a Physical Uplink Control Channel (PUCCH) format based on the number of HARQ-ACK feedback bits and the number of CSI feedback bits;
• and
• transmitting, by the WTRU, the feedback message using the determined PUCCH format.

A wireless transmit/receive unit (WTRU) for uplink feedback for operating with a plurality of carriers, the WTRU comprising:

• a transceiver configured to receive a plurality of transport blocks over a set of a plurality of configured carriers;
• a processor operatively coupled to the transceiver, the processor configured to generate hybrid automatic repeat request (HARQ) acknowledgment (ACK) feedback for the plurality of transport blocks and channel state information (CSI) feedback for at least one of the plurality of configured carriers;
• the processor configured to generate a feedback message that includes a number of HARQ-ACK feedback bits to use for the HARQ-ACK feedback and a number of CSI feedback bits to use for the CSI feedback;
• the processor configured to determine a Physical Uplink Control Channel (PUCCH) format based on the number of HARQ-ACK feedback bits and the number of CSI feedback bits;
• and
• the transceiver configured to transmit the feedback message using the determined PUCCH format.