Method and apparatus for performing timing synchronization in wireless communication system

An apparatus for performing timing synchronization in a wireless communication system, the apparatus comprising:

• a radio frequency (RF) unit for transmitting/receiving a radio signal;
• and
• a processor coupled to the RF unit to determine allocated resource information,
• wherein the processor is configured for:
• transmitting user equipment (UE) capability information comprising an ability of supporting device to device (D2D) communication;
• receiving resource information allocated by being distinguished for a cellular UE and the D2D UE from an evolved NodeB (eNB), and transmitting a synchronization signal in at least one symbol location among first and last symbols of a corresponding resource block by using the received resource information;
• and
• acquiring synchronization between the D2D UEs by using the synchronization signal,
• wherein the resource information for the D2D UE is determined by considering the number of the D2D UEs and a cell size of the eNB, has different frequency and time domains for each D2D UE, and comprises a different time offset value.