Method and apparatus for fast beam measurement and reporting

A base station (BS), comprising:

• a transceiver configured to:
• transmit information indicating associations between a set of transmission configuration information (TCI) states and reference signals (RSs) for beam measurement, respectively, and
• transmit a TCI state from the set of TCI states for beam indication, and
• a processor operably coupled to the transceiver, the processor configured to determine a RS for beam measurement based on the TCI state and the information,
• wherein the transceiver is further configured to:
• receive or transmit the RS for beam measurement, and
• when the RS is a downlink (DL) RS, receive a measurement report indicating measurement of the RS.

A method of operating a user equipment (UE), the method comprising:

• receiving information indicating associations between a set of transmission configuration indication (TCI) states and reference signals (RSs) for beam measurement, respectively;
• receiving a TCI state from the set of TCI states for beam indication;
• determining, in response to reception of the TCI state, a RS for beam measurement based on the TCI state and the information;
• transmitting or receiving the RS for beam measurement;
• based on the RS being a downlink (DL) RS:
• measuring the DL RS and determining a measurement report;
• and
• transmitting the measurement report.