Uplink synchronization method and apparatus

The present invention provides a method for uplink synchronization in a wireless network system having at least one access device of the user equipment, wherein the user equipment device to device having a communication capability, the method comprising the steps of: said the user equipment receives a message from the neighboring synchronization reference user equipment, wherein the user device has completed adjacent the uplink synchronization with the access device; said device to implement the user based on the synchronization reference information received the access device uplink synchronization.