Methods and apparatus for uplink control enhancement

A wireless transmit/receive unit (WTRU) for wireless communications, the WTRU comprising:

• a receiver configured to receive configuration information comprising an indication to activate one or more downlink semi-persistent scheduling (SPS) configurations of a set of downlink SPS configurations;
• a processor configured to:
• determine a payload size of uplink control information (UCI) for an uplink transmission, wherein the UCI indicates a set of hybrid automatic repeat request (HARQ) feedback bits associated with one or more downlink transmissions,
• determine at least a portion of the set of HARQ feedback bits to be transmitted based on at least one of the payload size of the UCI being greater than or equal to a first threshold or a number of the activated downlink SPS configurations being greater than or equal to a second threshold, wherein the at least the portion of the set of HARQ feedback bits comprises a first subset of HARQ feedback bits and a second subset of HARQ feedback bits, wherein the first subset of HARQ feedback bits is associated with a first activated downlink SPS configuration and the second subset of HARQ feedback bits is associated with a second activated downlink SPS configuration, and wherein the at least portion of the set of HARQ feedback corresponds to a subset of the one or more downlink transmissions,
• determine a first priority associated with the first activated downlink SPS configuration and a second priority associated with the second activated downlink SPS configuration, and
• select between the first subset of HARQ feedback bits and the second subset of HARQ feedback bits to be included in the at least the portion of the set of HARQ feedback bits based on any of the first priority or the second priority;
• and
• a transmitter configured to transmit at least the portion of the set of HARQ feedback bits using the uplink transmission.