In the instant disclosure a method includes selecting at least one UE located in the serving cell and operates in a RRC connected mode, transmitting, to the at least one UE, a request message requesting information related to a discovery channel of the neighbor cell, receiving, from the at least one UE, at least one of an ID of the neighbor cell, a temporally adjusted value obtained by shifting the discovery channel with respect to a frame reference time of the neighbor cell, or an NTD between the serving cell and the neighbor cell, and aligning the discovery channel interval of the serving cell to the discovery channel interval of the neighbor cell based on the at least one of the ID of the neighbor cell, the temporally adjusted value, or the NTD, by a serving eNB managing the serving cell.