Method for assisting device-to-device communication in wireless communication system supporting device-to-device communication and device therefor

A D2D assisting device (DAD) for assisting a device-to-device (D2D) communication in a wireless communication system supporting the D2D communication, comprising:

• a radio frequency (RF) unit for transmitting and receiving a wireless signal;
• and
• a processor for controlling the RF unit,
• wherein the processor is configured to perform:
• receiving resource pool information and DAD mode configuration information for the D2D communication from a base station;
• performing a D2D activity monitoring for a D2D user equipment by listening to one or more D2D communication links within the resource pool;
• and
• based on a DAD mode determined by the DAD mode configuration information, performing a DAD operation of (i) reporting the D2D activity monitoring result to the base station or (ii) allocating a resource to the D2D user equipment based on the D2D activity monitoring result.