D2D communication method and device on basis of hopping sequence

A device for performing device-to-device (D2D) communication on the basis of a hopping sequence, the device comprising:

• a transceiver configured to transmit or receive a radio signal;
• and
• a processor operatively coupled to the transceiver,
• wherein the processor is configured to:
• obtain information on a reference hopping sequence by a device, wherein the reference hopping sequence is a current hopping sequence of a target device on which a first D2D communication is to be performed based on a first link with the device,
• determine a final hopping sequence for performing the first D2D communication based on whether the device is an initial access device or a multi-access device and whether the current hopping sequence of the device is the same as at least one of the reference hopping sequence and a communication possible hopping sequence corresponding to the reference hopping sequence, and
• perform the first D2D communication based on the final hopping sequence,
• wherein if the device does not perform a second D2D communication based on a second link with a different device before the first D2D communication, the device is the initial access device,
• wherein if the device has performed the second D2D communication based on the second link with the different device before the first D2D communication, the device is the multi-access device, and
• wherein the communication possible hopping sequence includes a plurality of candidate hopping sequences having an overlapped channel in a same slot as the reference hopping sequence.