Patent ID: 9420551
Filing Date: 2016-08-16
CPC Classification: H04W,Y02D

Claim Text:
1. A method of controlling transmit power for a device-to-device (D2D) communication between user equipments (UEs), the method comprising: determining, by a first UE, to transmit a D2D discovery channel for searching for a peer UE; determining transmit power of the D2D discovery channel based on a pathloss estimate and a first parameter associated with a number of physical resource blocks (PRBs) for transmitting the D2D discovery channel; transmitting, by the first UE, the D2D discovery channel based on the determined transmit power of the D2D discovery channel; determining transmit power of a D2D data channel based on the pathloss estimate and a second parameter associated with a number of PRBs for transmitting the D2D data channel; and transmitting the D2D data channel to the peer UE based on the determined transmit power of the D2D data channel, wherein the number of PRBs for transmitting the D2D data channel is configured to have various sizes, wherein the number of PRBs for transmitting the D2D discovery channel is fixed as 2, and wherein the pathloss estimate is determined based on a link between an evolved NodeB (eNB) and the first UE.