Patent ID: 9674760
Date: 2017-06-06
CPC Classifications: H04W

Claim:
1. A method for performing device-to-device (D2D) communication in a wireless communication system, the method comprising: establishing, by a master user equipment (UE), a D2D link with a slave UE; performing, by the master UE, the D2D communication with the slave UE through the D2D link; receiving, by the master UE from the slave UE, handover information of the slave UE; transmitting, by the master UE to a base station of a handover source cell, the handover information of the slave UE; receiving, by the master UE from the base station of the handover source cell, a handover command message; and transmitting, by the master UE to the slave UE, handover information of the handover target cell, wherein the handover information of the handover target cell contains a timing advance value for the handover target cell of the master UE, and wherein the handover command message is a radio resource control (RRC) connection reconfiguration message, which includes D2D related information between the master UE and the slave UE.