Method of device-to-device communication in wireless mobile communication system

PURPOSE: A device-to-device (D2D) communication method in a wireless communication system is provided to control the transmission and reception of a sounding reference signal for measuring a channel state of a D2D link. CONSTITUTION: A first terminal (411) receives an activation reception allocation information of a first D2D link from a first base station (410) in a first sub frame (S410). The first terminal transmits whether a reception is successful about the activation reception allocation information of the first D2D link or not in a second sub frame after the fixed number of sub frames from the first sub frame (S430). The first terminal receives the data of the first D2D link from a second terminal based on the activation reception allocation information of the first D2D link in a third sub frame after the fixed number of sub frames from the second sub frame. [Reference numerals] (410) First base station; (411) First terminal; (420) Second base station; (421) Second terminal; (S410,S411) Sounding reference signal setting information; (S420) Sounding reference signal; (S430) Channel state information