Dmrs-based beam management for downlink repetition

A method of wireless communication performed by a base station (BS), comprising:

• transmitting one or more demodulation reference signals (DMRSs) on a narrow beam that is located within a wide beam associated with a transmission configuration indication (TCI) indicated in a grant for a downlink transmission associated with the one or more DMRSs,
• wherein each of the DMRSs is associated with a repetition of a downlink transmission;
• and
• receiving an indication of respective measurements of at least a subset of the one or more DMRSs.

A user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
• perform respective measurements of one or more demodulation reference signals (DMRSs),
• wherein each of the one or more DMRSs is associated with a repetition of a downlink transmission, and
• wherein each of the one or more DMRSs is transmitted on a narrow beam that is located within a wide beam associated with a transmission configuration indication (TCI) indicated in a grant for the downlink transmission;
• and
• transmit an indication of one or more of the respective measurements.

A base station (BS) for wireless communication, comprising:

• a memory;
• and
• one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
• transmit one or more demodulation reference signals (DMRSs) on a narrow beam that is located within a wide beam associated with a transmission configuration indication (TCI) indicated in a grant for a downlink transmission associated with the one or more DMRSs,
• wherein each of the DMRSs is associated with a repetition of a downlink transmission;
• and
• receive an indication of respective measurements of at least a subset of the one or more DMRSs.