Method and device for communicating device-to-device

Abstract

The present invention relates to a wireless communication system, and more specifically, to a method and a device for communicating device-to-device. The method for a first device to transmit a signal to a second device according to one embodiment of the present invention enables the first device to request to a base station a resource allocation for transmitting the signal to the second device, receive from the base station scheduling information for transmitting the signal to the second device, and the signal can be transmitted from the first device to the second device on the basis of the scheduling information, wherein the scheduling information includes information on an uplink resource for transmitting the signal from the first device to the second device.

1 - 17 . (canceled) 
     
     
         18 . A method for a first user equipment (UE) in a wireless communication system, the method comprising:
 transmitting, to a base station (BS), a report comprising (i) information related to a buffer status and (ii) information related to a device-to-device (D2D) communication destination;   receiving, from the BS, first information scheduling first uplink resources for D2D communication, wherein the first uplink resources are related to the report; and   transmitting, to the D2D communication destination, a signal in the first uplink resources;   wherein the first information is masked by a first identifier related to the D2D communication, and   wherein the first identifier is different from a second identifier related to a UE-to-BS communication.   
     
     
         19 . The method of  claim 18 , further comprising: receiving, from the BS, second information scheduling second uplink resources for the UE-to-BS communication,
 wherein the report is transmitted in the second uplink resources, and   wherein the second information is masked by the second identifier.   
     
     
         20 . The method of  claim 18 , wherein the report further comprises information related to the first identifier. 
     
     
         21 . The method of  claim 18 , wherein acknowledgement/negative acknowledgment (ACK/NACK) information regarding the signal is transmitted from a second UE to the BS,
 wherein the second UE is related to the D2D communication destination,   wherein ACK/NACK information regarding a maximum of N signals received by the second UE is transmitted to the BS on a single uplink subframe,   wherein N is a fixed value in both a case in which the ACK/NACK information regarding the signal is transmitted in the single uplink subframe and a case in which the ACK/NACK information regarding the signal is not transmitted in the single uplink subframe.   
     
     
         22 . A first user equipment (UE) in a wireless communication system, the first UE comprising:
 a memory; and   at least one processor coupled with the memory,   wherein the at least processor is configured to:   transmit, to a base station (BS), a report comprising (i) information related to a buffer status and (ii) information related to a device-to-device (D2D) communication destination;   receive, from the BS, first information scheduling first uplink resources for D2D communication, wherein the first uplink resources are related to the report; and   transmit, to the D2D communication destination, a signal in the first uplink resources;   wherein the first information is masked by a first identifier related to the D2D communication, and   wherein the first identifier is different from a second identifier related to a UE-to-BS communication.   
     
     
         23 . The first UE of  claim 22 , wherein the at least one processor is further configured to: receive, from the BS, second information scheduling second uplink resources for the UE-to-BS communication,
 wherein the report is transmitted in the second uplink resources, and   wherein the second information is masked by the second identifier.   
     
     
         24 . The first UE of  claim 22 , wherein the report further comprises information related to the first identifier. 
     
     
         25 . The first UE of  claim 22 , wherein acknowledgement/negative acknowledgment (ACK/NACK) information regarding the signal is transmitted from a second UE to the BS,
 wherein the second UE is related to the D2D communication destination,   wherein ACK/NACK information regarding a maximum of N signals received by the second UE is transmitted to the BS on a single uplink subframe,   wherein N is a fixed value in both a case in which the ACK/NACK information regarding the signal is transmitted in the single uplink subframe and a case in which the ACK/NACK information regarding the signal is not transmitted in the single uplink subframe.