Method and apparatus for handling sidelink reference signal for beam management in a wireless communication system

A method of a first device, comprising:

• obtaining or receiving a configuration of a first sidelink resource pool in a sidelink carrier or cell;
• obtaining or receiving a configuration of a first one or more resources for standalone Sidelink (SL) Channel State Information Reference Signal (CSI-RS) transmissions, receptions, or measurements in the sidelink carrier or cell;
• obtaining or receiving a configuration of a second one or more resources for SL data and/or feedback transmissions, receptions, or measurements in the sidelink carrier or cell;
• and
• performing one or more standalone SL CSI-RS transmissions, receptions, or measurements within the first one or more resources.

A first device, comprising:

• a memory;
• and
• a processor operatively coupled with the memory, wherein the processor is configured to execute a program code to:
• be scheduled or requested to perform one or more standalone Sidelink (SL) Channel State Information Reference Signal (CSI-RS) transmissions, receptions, or measurements in a first sidelink Transmission Time Interval (TTI) in a first sidelink resource pool in a sidelink carrier or cell;
• be scheduled or requested to perform a first sidelink data and/or feedback transmission or reception in the first sidelink TTI in the sidelink carrier or cell;
• and
• determine to perform either the one or more standalone SL CSI-RS transmissions, receptions, or measurements, or the first sidelink data and/or feedback transmission or reception in the first sidelink TTI, at least based on a parameter of a standalone SL CSI-RS.