Method and apparatus for CSI-RS enhancement for NR unlicensed spectrum

A base station (BS) in a wireless communication system supporting a shared spectrum channel access, the BS comprising:

• a processor configured to determine a set of quasi-co-located (QCLed) occasions within the discovery burst transmission window, the determined set of QCLed occasions associated with antenna ports having common properties for a downlink reception;
• and
• a transceiver operably connected to the processor, the transceiver configured to:
• transmit, to a user equipment (UE), system information indicating the discovery burst transmission window, and
• transmit, to the UE, a channel state information reference signal (CSI-RS) resource based on the determined set of QCLed occasions within the discovery burst transmission window.

A method of a user equipment (UE) in a wireless communication system supporting a shared spectrum channel access, the method comprising:

• receiving, from a base station (BS), system information indicating a discovery burst transmission window;
• determining a set of quasi-co-located (QCLed) occasions within the discovery burst transmission window included in the system information, the determined set of QCLed occasions associated with antenna ports having common properties for a downlink reception;
• and
• receiving, from the BS, a channel state information reference signal (CSI-RS) resource based on the determined set of QCLed occasions within the discovery burst transmission window.