Method for data transmission in sidelink and terminal device

1. A method for data transmission in a sidelink, comprising:

selecting, by a first terminal device, a first resource from a data resource pool within a selecting window, wherein the first resource is configured to send data of the first terminal device;

selecting, by the first terminal device, a second resource configured to send first indication information from a control resource pool within the selecting window, wherein the first indication information is configured to indicate the first resource, and positions of the first resource and the second resource are different in time domain and/or frequency domain;

sending, by the first terminal device, the first indication information on the second resource, and sending the data of the first terminal device on the first resource,

receiving, by the first terminal device, second indication information sent by a second terminal device on a third resource, wherein the second indication information indicates a fourth resource configured to transmit data of the second terminal device; and

determining, by the first terminal device, whether to send the data of the first terminal device on the first resource when there is a resource conflict between the first resource and the fourth resource,

wherein determining, by the first terminal device, whether to send the data of the first terminal device on the first resource, comprises:

determining, by the first terminal device, whether to send the data of the first terminal device on the first resource according to priority information of the data of the first terminal device and the second terminal device,

wherein there is a corresponding relationship between resources in the data resource pool and resources in the control resource pool, wherein, selecting, by the first terminal device, the second resource configured to send the first indication information from the control resource pool within the selecting window, comprises:

selecting, by the first terminal device, the second resource from at least one resource corresponding to the first resource in the control resource pool,

wherein that there is the resource conflict between the first resource and the fourth resource comprises that the first resource partially overlaps or completely overlaps with the fourth resource, and

wherein selecting, by the first terminal device, the first resource from the data resource pool within the selecting window, comprises:

selecting, by the first terminal device, the first resource within a time period from a time point n+T 1 to a time point n+T 2 , wherein, a time point n is a time point when the data of the first terminal device arrives, or a time point when the first terminal device starts to select a resource, and wherein T 1 ≥0, T 1 ≤T 2 ≤T 3 , and T 3 is a delay requirement of the data of the first terminal device.

2. The method of claim 1 , wherein the first indication information is carried in Sidelink Control Information (SCI), or the first indication information is a preamble sequence.

3. The method of claim 1 , wherein selecting, by the first terminal device, the first resource from the data resource pool within the selecting window, comprises:

performing, by the first terminal device, resource sensing; and

selecting, by the first terminal device, the first resource in the data resource pool according to a result of the resource sensing.

4. The method of claim 3 , wherein performing, by the first terminal device, resource sensing, comprises:

performing, by the first terminal device, the resource sensing before a starting time point of the second resource.

5. The method of claim 1 , wherein selecting, by the first terminal device, the first resource from the data resource pool within the selecting window, comprises:

selecting, by the first terminal device, a plurality of candidate resources from the data resource pool within the selecting window, wherein the plurality of candidate resources comprise the first resource, and wherein a time interval between two candidate resources adjacent in the time domain is less than or equal to the delay requirement of the data of the first terminal device.

6. A terminal device, being a first terminal device, wherein the first terminal device comprises: a processor and a transceiver,

the processor is configured to select a first resource from a data resource pool within a selecting window, wherein the first resource is configured to send data of the first terminal device;

the processor is further configured to select a second resource configured to send first indication information from a control resource pool within the selecting window, wherein the first indication information is configured to indicate the first resource, and positions of the first resource and the second resource are different in time domain and/or frequency domain; and

the transceiver is configured to send the first indication information on the second resource, and send the data of the first terminal device on the first resource,

wherein the transceiver is configured to receive second indication information sent by a second terminal device on a third resource, wherein the second indication information indicates a fourth resource configured to transmit data of the second terminal device;

wherein the processor is configured to determine whether to send the data of the first terminal device on the first resource when there is a resource conflict between the first resource and the fourth resource,

wherein the processor is specifically configured to:

determine whether to send the data of the first terminal device on the first resource according to priority information of the data of the first terminal device and the second terminal device,

wherein there is a corresponding relationship between resources in the data resource pool and resources in the control resource pool, wherein, the processor is specifically configured to:

select the second resource from at least one resource corresponding to the first resource in the control resource pool,

wherein that there is the resource conflict between the first resource and the fourth resource comprises that the first resource partially overlaps or completely overlaps with the fourth resource, and

wherein the processor is specifically configured to:

select the first resource within a time period from a time point n+T 1 to a time point n+T 2 , wherein, a time point n is a time point when the data of the first terminal device arrives, or a time point when the first terminal device starts to select a resource, and wherein T 1 ≥0, T 1 ≤T 2 ≤T 3 , and T 3 is a delay requirement of the data of the first terminal device.

7. The terminal device of claim 6 , wherein the first indication information is carried in Sidelink Control Information (SCI), or the first indication information is a preamble sequence.

8. The terminal device of claim 6 , wherein the processor is further configured to: perform resource sensing; and

select the first resource in the data resource pool according to a result of the resource sensing.

9. The terminal device of claim 8 , wherein the processor is specifically configured to:

perform the resource sensing before a starting time point of the second resource.

10. The terminal device of claim 6 , wherein the processor is specifically configured to:

select a plurality of candidate resources from the data resource pool within the selecting window, wherein the plurality of candidate resources comprise the first resource, and wherein a time interval between two candidate resources adjacent in the time domain is less than or equal to the delay requirement of the data of the first terminal device.