Patent ID: 9712995
Date: 2017-07-18
CPC Classifications: H04W

Claim:
1. A method for transmitting synchronization signals for a Device-to-Device (D2D) link at a user equipment (UE) in a wireless communication system, the method comprising; receiving, by the UE, one or more first synchronization signals for the D2D link from one or more first UEs, each of the one or more first synchronization signals providing information on a priority of a corresponding first synchronization signal, wherein the priority is determined based on whether the corresponding first synchronization signal is from a coverage providing a reception quality equal to or greater than a predetermined level; selecting, by the UE, one of the one or more first synchronization signals having a highest priority based on the reception quality; generating, by the UE, a second synchronization signal for the D2D link using the selected first synchronization signal when the reception quality of the selected first synchronization signal is lower than a threshold value; and transmitting, by the UE, the second synchronization signal to at least one second UE.