Techniques and apparatuses for determining uplink transmission timelines related to a channel state information reference signal (CSI-RS)

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

• transmitting, to a user equipment (UE), a transmission of a channel state information reference signal (CSI-RS),
• wherein the transmission of the CSI-RS is transmitted at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE;
• transmitting downlink control information (DCI) that includes a value in a channel state information (CSI) request field of the DCI,
• wherein the value in the CSI request field indicates a transmission configuration indication (TCI) state of the transmission of the CSI-RS;
• and
• determining an uplink receive beam for the scheduled uplink transmission based at least in part on transmitting the transmission of the CSI-RS and the TCI state of the transmission of the CSI-RS,
• wherein the transmission of the CSI-RS has a closest temporal proximity prior to the scheduled uplink transmission relative to one or more other transmissions of the CSI-RS.

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

• a memory;
• and
• one or more processors coupled to the memory, the memory and the one or more processors configured to:
• receive, from a base station (BS), a transmission of a channel state information reference signal (CSI-RS),
• wherein the transmission of the CSI-RS is received at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE;
• receive downlink control information (DCI) that includes a value in a channel state information (CSI) request field of the DCI,
• wherein the value in the CSI request field indicates a transmission configuration indication (TCI) state of the transmission of the CSI-RS;
• and
• determine an uplink transmit beam for the scheduled uplink transmission based at least in part on receiving the transmission of the CSI-RS and the TCI state of the transmission of the CSI-RS,
• wherein the transmission of the CSI-RS has a closest temporal proximity prior to the scheduled uplink transmission relative to one or more other transmissions of the CSI-RS.

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

• a memory;
• and
• one or more processors coupled to the memory, the memory and the one or more processors configured to:
• transmit, to a user equipment (UE), a transmission of a channel state information reference signal (CSI-RS),
• wherein the transmission of the CSI-RS is transmitted at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE;
• transmit downlink control information (DCI) that includes a value in a channel state information (CSI) request field of the DCI,
• wherein the value in the CSI request field indicates a transmission configuration indication (TCI) state of the transmission of the CSI-RS;
• and
• determine an uplink receive beam for the scheduled uplink transmission based at least in part on transmitting the transmission of the CSI-RS and the TCI state of the transmission of the CSI-RS,
• wherein the transmission of the CSI-RS has a closest temporal proximity prior to the scheduled uplink transmission relative to other transmissions of the CSI-RS.