Method for configuring reference signal for V2V communication in wireless communication system, and apparatus therefor

A device transmitting demodulation reference signals (DMRSs) in a wireless communication system, the device comprising:

• an RF (radio frequency) unit;
• and
• a processor configured to:
• map the DMRSs to resource elements on multiple symbols in a subframe comprising a first slot and a second slot, and
• transmit the DMRSs to a receiving end,
• wherein a first number of the symbols on which the DMRSs are transmitted for vehicle-to-everything (V2X) communication corresponds to 2 times of a second number of the symbols on which the DMRSs are transmitted for a uplink data transmission,
• wherein the first number of the symbols are located with a same symbol interval within the subframe,
• wherein the symbols on which the DMRSs are transmitted for V2X communication correspond to a third symbol and a sixth symbol in the first slot, and
• wherein the symbols on which the DMRSs are transmitted for V2X communication correspond to a second symbol and a fifth symbol in the second slot.