A user terminal, apparatus therefor, and method performed at a user terminal perform device-to-device (D2D) communication that is direct inter-terminal communication. The terminal stores preconfigured resource information and power information used to control the D2D communication, determines whether the user terminal is in out of coverage by not detecting at least one cell meeting a criterion based on a received power of radio signal, and determines to use the resource information and the power information stored in the storage in response to an out of coverage determination. The user terminal transmits data to other user terminal by the D2D communication based on both the resource information and the power information while the user terminal exists in the out of coverage.