Appratus and method for communicating device to device in an wireless network

According to an embodiment of the present invention to provide an apparatus and method for transmitting a search signal (discovery signal) to support the application based on the direct communication between devices, the source device over the wireless network. When one application is selected from at least one of the applications installed in the interior of the source device for this purpose, detection of the destination device to perform the direct communication between the devices for the selected application, the chosen based on the distance-control information defined for the application controlling a transmission power of a search signal for, and transmits the search signal by a transmission power according to the control.