A method of transmitting a device-to-device (D2D) signal by a first D2D user equipment (UE) supporting D2D communication. A first D2D UE requests a second D2D UE to repeatedly broadcast or multicast the D2D data together with the first D2D UE on a same time-frequency resource based on a single frequency network (SFN) scheme. In addition, scheduling assignment information includes information for restricting the second D2D UE from broadcasting or multicasting the D2D data received from the first D2D UE according to the request of the first D2D UE based on the SFN scheme when a distance from the first D2D UE is equal to or greater than a preset distance.