Downlink control information based unified transmission configuration indicator acknowledgement

An apparatus for wireless communications at a user equipment (UE), comprising:

• at least one processor;
• at least one memory coupled with the at least one processor;
• and
• instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to:
• receive downlink control information (DCI) scheduling a downlink shared channel, the DCI comprising a transmission configuration indicator (TCI) state indicating a common beam for at least one channel;
• transmit a feedback message for the downlink shared channel, wherein the feedback message acknowledges receipt of the TCI state;
• and
• apply the TCI state after termination of a beam application time, and based at least in part on transmission of the feedback message acknowledging the receipt of the TCI state, the beam application time being based at least in part on a beam switch indicated by the TCI state.

An apparatus for wireless communications at a network device, comprising:

• at least one processor;
• at least one memory coupled with the at least one processor;
• and
• instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to:
• transmit, to a user equipment (UE), downlink control information (DCI) scheduling a downlink shared channel, the DCI comprising a transmission configuration indicator (TCI) state indicating a common beam for at least one channel;
• and
• receive, from the UE, a feedback message for the downlink shared channel, wherein the feedback message acknowledges receipt of the TCI state by the UE, wherein the TCI state is applicable after termination of a beam application time, the beam application time being based at least in part on a beam switch indicated by the TCI state.

An apparatus for wireless communications at a user equipment (UE), comprising:

• means for receiving downlink control information (DCI) scheduling a downlink shared channel, the DCI comprising a transmission configuration indicator (TCI) state indicating a common beam for at least one channel;
• means for transmitting a feedback message for the downlink shared channel, wherein the feedback message acknowledges receipt of the TCI state;
• and
• means for applying the TCI state after termination of a beam application time, and based at least in part on transmission of the feedback message acknowledging the receipt of the TCI state, the beam application time being based at least in part on a beam switch indicated by the TCI state.