D2D communication method and device

1. A device to device (D2D) communication method, comprising:

receiving, by a user equipment (UE), resource pool configuration information comprising information for determining a plurality of frequency domain resources in a single resource pool, wherein the plurality of frequency domain resources are available for receiving scheduling assignment (SA) information, wherein the plurality of frequency domain resources are periodic in a frequency domain, wherein the resource pool configuration information comprises frequency domain resource location information, wherein the frequency domain resource location information comprises information for determining locations of the plurality of frequency domain resources in the frequency domain, wherein the frequency domain resource location information comprises a frequency domain resource offset indicator and a frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources in the single resource pool, wherein the frequency domain resource offset indicator comprises a start location of a first frequency domain resource of the plurality of frequency domain resources in the single resource pool in the frequency domain, and wherein the frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources comprises a frequency domain spacing between two consecutive physical resource blocks that are available for receiving the SA information;

determining, by the UE and based on the frequency domain resource offset indicator and the frequency domain spacing between two consecutive physical resource blocks that are available for receiving the SA information, the plurality of frequency domain resources that are available for receiving the SA information; and

detecting, by the UE and from the determined plurality of frequency domain resources that are available for receiving the SA information, a frequency domain resource in which the SA information is located.

2. The method according to claim 1 , wherein the frequency domain resource offset indicator uses a physical resource block or a sub-band as a unit.

3. The method according to claim 1 , wherein a reference location of the frequency domain resource offset indicator is a start location of a system bandwidth or an end location of the system bandwidth.

4. The method according to claim 1 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources uses a physical resource block or a sub-band as a unit.

5. The method according to claim 1 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources is preconfigured, configured by a base station, or determined based on a system bandwidth.

6. A user equipment (UE), comprising:

a transceiver configured to receive resource pool configuration information comprising information for determining a plurality of frequency domain resources in a single resource pool, wherein the plurality of frequency domain resources are available for receiving scheduling assignment (SA) information, wherein the plurality of frequency domain resources are periodic in a frequency domain, wherein the resource pool configuration information comprises frequency domain resource location information, wherein the frequency domain resource location information comprises information for determining locations of the plurality of frequency domain resources in the frequency domain, wherein the frequency domain resource location information comprises a frequency domain resource offset indicator and a frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources in the single resource pool, wherein the frequency domain resource offset indicator comprises a start location of a first frequency domain resource of the plurality of frequency domain resources in the single resource pool in the frequency domain, and wherein the frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources comprises a frequency domain spacing between two consecutive physical resource blocks that are available for receiving the SA information;

at least one processor; and

a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, the programming instructions instruct the at least one processor to determine, based on the frequency domain resource offset indicator and the frequency domain spacing between two consecutive physical resource blocks that are available for receiving the SA information, the plurality of frequency domain resources that are available for receiving the SA information, and

wherein the transceiver is further configured to detect, from the determined plurality of frequency domain resources that are available for receiving the SA information, a frequency domain resource in which the SA information is located.

7. The user equipment according to claim 6 , wherein the frequency domain resource offset indicator uses a physical resource block or a sub-band as a unit.

8. The user equipment according to claim 6 , wherein a reference location of the frequency domain resource offset indicator is a start location of a system bandwidth or an end location of the system bandwidth.

9. The user equipment according to claim 6 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources uses a physical resource block or a sub-band as a unit.

10. The user equipment according to claim 6 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources is preconfigured, configured by a base station, or determined based on a system bandwidth.

11. A device to device (D2D) communication method, comprising:

determining resource pool configuration information comprising information for determining a plurality of frequency domain resources in a single resource pool, wherein the plurality of frequency domain resources are available for transmitting scheduling assignment (SA) information, wherein the plurality of frequency domain resources are periodic in a frequency domain, wherein the resource pool configuration information comprises frequency domain resource location information, wherein the frequency domain resource location information comprises information for determining locations of the plurality of frequency domain resources in the frequency domain, wherein the frequency domain resource location information comprises a frequency domain resource offset indicator and a frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources in the single resource pool, wherein the frequency domain resource offset indicator comprises a start location of a first frequency domain resource of the plurality of frequency domain resources in the single resource pool in the frequency domain, and wherein the frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources comprises a frequency domain spacing between two consecutive physical resource blocks that are available for transmitting the SA information; and

sending the resource pool configuration information.

12. The method according to claim 11 , wherein the sending the resource pool configuration information comprises:

broadcasting a system message, wherein the system message carries the resource pool configuration information;

sending radio resource control (RRC) signaling, wherein the RRC signaling carries the resource pool configuration information; or

sending common control signaling, wherein the common control signaling carries the resource pool configuration information.

13. The method according to claim 11 , wherein the frequency domain resource offset indicator uses a physical resource block or a sub-band as a unit.

14. The method according to claim 11 , wherein a reference location of the frequency domain resource offset indicator is a start location of a system bandwidth or an end location of the system bandwidth.

15. The method according to claim 11 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources uses a physical resource block or a sub-band as a unit.

16. The method according to claim 11 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources is preconfigured, configured by a base station, or determined based on a system bandwidth.

17. A base station, comprising:

at least one processor; and

a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, the programming instructions instruct the at least one processor to determine resource pool configuration information comprising information for determining a plurality of frequency domain resources in a single resource pool, wherein the plurality of frequency domain resources are available for transmitting scheduling assignment (SA) information, wherein the plurality of frequency domain resources are periodic in a frequency domain, wherein the resource pool configuration information comprises frequency domain resource location information, wherein the frequency domain resource location information comprises information for determining locations of the plurality of frequency domain resources in the frequency domain, wherein the frequency domain resource location information comprises a frequency domain resource offset indicator and a frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources in the single resource pool, wherein the frequency domain resource offset indicator comprises a start location of a first frequency domain resource of the plurality of frequency domain resources in the single resource pool in the frequency domain, and wherein the frequency domain spacing between two consecutive frequency domain resources of the plurality of frequency domain resources comprises a frequency domain spacing between two consecutive physical resource blocks that are available for transmitting the SA information; and

a transmitter configured to send the resource pool configuration information.

18. The base station according to claim 17 , wherein the transmitter is configured to:

broadcast a system message, wherein the system message carries the resource pool configuration information;

send RRC signaling, wherein the RRC signaling carries the resource pool configuration information; or

send common control signaling, wherein the common control signaling carries the resource pool configuration information.

19. The base station according to claim 17 , wherein the frequency domain resource offset indicator uses a physical resource block or a sub-band as a unit.

20. The base station according to claim 17 , wherein a reference location of the frequency domain resource offset indicator is a start location of a system bandwidth or an end location of the system bandwidth.

21. The base station according to claim 17 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources uses a physical resource block or a sub-band as a unit.

22. The base station according to claim 17 , wherein the frequency domain spacing between the two consecutive frequency domain resources of the plurality of frequency domain resources is preconfigured, configured by the base station, or determined based on a system bandwidth.