Device to device communication method and device for performing same

1. A method for performing, by a first user equipment (UE), device-to-device (D2D) communication between the first UE and a second UE in a wireless communication system, the method comprising:

receiving, from a base station (BS), reception scheduling information indicating specific resources on which the first UE receives data for D2D communication from the second UE in a first frequency band;

receiving, from the second UE, the data for D2D communication on the specific resources in a second frequency band, wherein the first frequency band is different than the second frequency band; and

transmitting, to the BS, feedback information in response to reception of the data for D2D communication in the second frequency band,

wherein the reception scheduling information is received in a subframe different from a subframe including transmission scheduling information, which is transmitted from the BS to the second UE, indicating the specific resources on which the second UE transmits the data for D2D communication to the first UE.

2. The method according to claim 1 , wherein the reception scheduling information and the transmission scheduling information indicate identical time-frequency resources.

3. The method according to claim 1 , wherein the transmission scheduling information is included in an n-th subframe of the first frequency band and the reception scheduling information is received in an (n+m)-th subframe of the first frequency band, where n and m are positive integers.

4. The method according to claim 1 , wherein the data for D2D communication is received in a subframe of the second frequency band having the same index as the index of a subframe of the first frequency band, in which the reception scheduling information is received.

5. A method for supporting, by a base station (BS), device-to-device (D2D) communication between a first user equipment (UE) and a second UE in a wireless communication system, the method comprising:

transmitting, to the second UE, transmission scheduling information indicating specific resources on which the second UE transmits data for D2D communication to the first UE in a first frequency band;

transmitting, to the first UE, reception scheduling information indicating the specific resources on which the first UE receives the data for D2D communication from the second UE in the first frequency band; and

receiving, from the first UE, feedback information in response to reception of the data for D2D communication in a second frequency band, wherein the first frequency band is different than the second frequency band,

wherein the transmission scheduling information and the reception scheduling information are transmitted in different subframes in the first frequency band.

6. The method according to claim 5 , wherein the reception scheduling information and the transmission scheduling information indicate identical time-frequency resources.

7. The method according to claim 5 , wherein the transmission scheduling information is transmitted in an n-th subframe of the first frequency band and the reception scheduling information is transmitted in an (n+m)-th subframe of the first frequency band, where n and m are positive integers.

8. The method according to claim 5 , wherein a transmission of the data for D2D communication is performed in a subframe of the second frequency band having the same index as the index of a subframe of the first frequency band, in which the reception scheduling information is transmitted.

9. A first user equipment (UE) configured to perform device-to-device (D2D) communication with a second UE in a wireless communication system, the first UE comprising:

a radio frequency (RF) unit configured to transmit or receive an RF signal; and

a processor configured to control the RF unit,

wherein the processor is configured to receive, from a base station (BS), reception scheduling information indicating specific resources on which the first UE receives data for D2D communication from the second UE in a first frequency band, to receive, from the second UE, the data for D2D communication on the specific resources in a second frequency band, in response to reception of the data for D2D communication in the second frequency band, wherein the first frequency band is different than the second frequency band,

wherein the reception scheduling information is received in a subframe different from a subframe in which transmission scheduling information, which is transmitted from the BS to the second UE, indicating the specific resources on which the second UE transmits the data for D2D communication to the first UE.

10. The first UE according to claim 9 , wherein the reception scheduling information and the transmission scheduling information indicate identical time-frequency resources.

11. The first UE according to claim 9 , wherein the transmission scheduling information is included in an n-th subframe of the first frequency band and the reception scheduling information is received in an (n+m)-th subframe of the first frequency band, where n and m are positive integers.

12. The first UE according to claim 9 , wherein the data for D2D communication is received in a subframe of the second frequency band having the same index as the index of a subframe of the first frequency band, in which the reception scheduling information is received.

13. A base station (BS) configured to support device-to-device (D2D) communication between a first user equipment (UE) and a second UE in a wireless communication system, the base station comprising:

a radio frequency (RF) unit configured to transmit or receive an RF signal; and

a processor configured to control the RF unit,

wherein the processor is configured to transmit, to the second UE, transmission scheduling information indicating specific resources on which the second UE transmits data for D2D communication to the first UE in a first frequency band, to transmit, to the first UE, reception scheduling information indicating the specific resources on which the first UE receives the data for D2D communication from the second UE in the first frequency band, and to receive, from the first UE, feedback information in response to reception of the data for D2D communication in a second frequency band, wherein the first frequency band is different than the second frequency band,

wherein the transmission scheduling information and the reception scheduling information are transmitted in different subframes in the first frequency band.

14. The base station according to claim 13 , wherein the reception scheduling information and the transmission scheduling information indicate identical time-frequency resources.

15. The base station according to claim 13 , wherein the transmission scheduling information is transmitted in an n-th subframe of the first frequency band and the reception scheduling information is transmitted in an (n+m)-th subframe of the first frequency band, where n and m are positive integers.

16. The base station according to claim 13 , wherein a transmission of the data for D2D communication is performed in a subframe of the second frequency band having the same index as the index of a subframe of the first frequency band, in which the reception scheduling information is transmitted.