Apparatus and method for relaying data in wireless access system supporting device to device communication

A relay user equipment (UE) for processing device to device (D2D) data in a wireless access system supporting D2D communication, the relay UE comprising:

• a transmitter;
• a receiver;
• and
• a processor configured to relay the D2D data in a manner of being functionally connected with the transmitter and the receiver, the processor configured to:
• receive a scheduling allocation (SA) signal to allocate a resource region in which the D2D data is received,
• receive the D2D data via the resource region,
• when the SA signal or a medium access control (MAC) header related to the D2D data includes a relay indicator, determine that the D2D data is received from an out-of-coverage UE, and relay the D2D data,
• when the SA signal and the MAC header do not include the relay indicator, determine that the D2D data is received from an in-coverage UE, and skip relaying of the D2D data, wherein the relay indicator indicates that the D2D data is received from the out-of-coverage UE.