D2D communication is appropriately controlled even in an environment in which a second user terminal inside the coverage and a first user terminal outside the coverage both exist. The first user terminal directly receives from the second user terminal device-to-device (D2D) synchronization information including coverage information that indicates that the second user terminal is in the coverage area, determines, based on the coverage information, whether the second user terminal is in the coverage area, selects the second user terminal as a synchronization reference of the first user terminal in response to determining that the second user terminal is in the coverage area, and receives usable resource information broadcasted from the second user terminal that becomes the synchronization reference, the usable resource information indicating D2D usable resources notified from a base station to the second user terminal by broadcast signaling.