Dynamic transmission configuration indication state updating

A method for wireless communication at a base station, comprising:

• identifying a set of transmission configuration indication (TCI) states that indicate quasi co-location (QCL) relationships between antenna ports used for communicating with a user equipment (UE);
• determining a subset of the set of TCI states to update, the updated subset of the set of TCI states indicating updated QCL relationships between antenna ports used for communicating with the UE;
• transmitting downlink control information (DCI) to the UE that identifies the subset of the set of TCI states to update based at least in part on the determining;
• and
• receiving, from the UE, an indication as to whether the DCI transmitted to update the subset of the set of TCI states was received.

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

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a set of transmission configuration indication (TCI) states that indicate quasi co-location (QCL) relationships between antenna ports used for communicating with a base station;
• receive, from the base station, downlink control information (DCI) indicating an update to a subset of the set of TCI states, the updated subset of the set of TCI states indicating updated QCL relationships between the antenna ports used for communicating with the base station;
• determine whether to transmit an indication as to whether the DCI was received, the determining based at least in part on the subset of the set of TCI states to be updated;
• and
• communicate with the base station based at least in part on the updated subset of the set of TCI states.

An apparatus for wireless communication at a base station, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a set of transmission configuration indication (TCI) states that indicate quasi co-location (QCL) relationships between antenna ports used for communicating with a user equipment (UE);
• determine a subset of the set of TCI states to update, the updated subset of the set of TCI states indicating updated QCL relationships between antenna ports used for communicating with the UE;
• transmit downlink control information (DCI) to the UE that identifies the subset of the set of TCI states to update based at least in part on the determining;
• and
• receive, from the UE, an indication as to whether the DCI transmitted to update the subset of the set of TCI states was received.