Method for D2D signal transmission in wireless communication system, and terminal using same

A user equipment (UE) comprising:

• a transceiver for transmitting and receiving a radio signal;
• and
• a processor, operatively coupled to the transceiver, wherein the processor is configured to:
• perform synchronization and downlink measurements;
• and
• transmit the D2D discovery signal based on the synchronization and downlink measurements,
• wherein when a second frequency on which the D2D discovery signal is to be transmitted is different from a first frequency on which the UE is connected with a base station, and when the UE is configured with measurement carrier indication information informing a third frequency, the UE use the third frequency informed by the measurement carrier indication information as reference to perform the synchronization and the downlink measurements for the D2D discovery signal transmission.