METHOD FOR SIMULTANEOUS HANDOVER IN A WIRELESS ACCESS SYSTEM THAT SUPPORTS DEVICE-TO-DEVICE COMMUNICATION AND APPARATUS FOR SUPPORTING THE METHOD

Disclosed are a method for simultaneously handing over devices which perform device-to-device communication to another cell in a wireless access system that supports device-to-device communication, and an apparatus for supporting the method. The method for simultaneously handing over devices in a wireless access system that supports direct device-to-device communication according to one embodiment of the present invention may comprise the following steps: detecting an occurrence of a handover condition in a first device that performs direct device-to-device communication; transmitting, to a second device that performs direct device-to-device communication, a cell state check request message for requesting information on a channel state with respect to a base station; searching for a target cell for handover by the first device; receiving, from the second device, a cell state check response message containing information on the channel state; searching for a common cell in which the target cell searched for by the first device and the target cell contained in the information on the channel state coincide with each other; and transmitting, to the second device, a common cell indication message for indicating the simultaneous handover of devices. Here, the common cell indication message may contain information on the common cell.