Method and device for allocating transmission power in wireless communication system

A user equipment (UE) comprising:

• a transceiver capable of transmitting and receiving at least one signal;
• and
• a controller coupled to the transceiver,
• wherein the controller is configured to:
• receive, from a base station, a first message including a first priority of a sidelink synchronization signal block (SSB) associated with a first radio access technology (RAT),
• receive, from another UE, a second message including sidelink control information (SCI) associated with a second RAT, wherein the SCI includes a second priority of a second sidelink transmission associated with the second RAT,
• identify whether a first sidelink transmission associated with the sidelink SSB and the second sidelink transmission overlap,
• determine a sidelink based on the first priority and the second priority in case that the first sidelink transmission and the second sidelink transmission overlap, and
• transmit sidelink information in the determined sidelink.