Granted Patent B2

US 12,273,774 · App. 17/774,996 · Granted Apr 8, 2025

Inventors: Xiaodong Yu (Beijing, CN); Zhennian Sun (Beijing, CN); Karthikeyan Ganesan (Kaiserslautern, DE); Haipeng Lei (Beijing, CN)

Assignee: Lenovo (Beijing) Limited

H04W28/26H04L1/1812H04W72/02H04W72/0446H04W72/0453H04W72/20H04W72/56

Abstract

Claims (53)

1. A method for sidelink communications performed by a user equipment (UE), the method comprising:

receiving sidelink control information (SCI) indicating one or more reserved resources, wherein the SCI explicitly or implicitly indicates a pre-emption indication (PI) resource on physical sidelink feedback channel (PSFCH);

determining whether the one or more reserved resources can be pre-empted;

upon determining that the one or more reserved resources can be pre-empted, transmitting a PI on the PI resource on the PSFCH to pre-empt the one or more reserved resources; and

performing a sidelink transmission on the pre-empted one or more reserved resources.

2. The method of claim 1 , comprising: determining to perform a pre-emption operation based on at least one of:

compared with a resource ratio threshold value of a total number of candidate resources, there is no enough candidate resource in a resource selection window;

compared with a power threshold value, there is no suitable candidate resource in the resource selection window;

after a power is increased in times greater than a maximum increasing threshold number, there is no suitable candidate resource in the resource selection window;

a measured channel busy ratio (CBR) is greater than a CBR threshold value; and

a packet delay budget of the sidelink transmission is less than a delay budget threshold value.

3. The method of claim 2 , comprising:

selecting a pre-emption reserved resource set, wherein the pre-emption reserved resource set includes the one or more reserved resources; and

reporting the pre-emption reserved resource set to an upper layer.

4. The method of claim 1 , wherein the one or more reserved resources can be pre-empted when satisfying at least one condition of:

a priority level indicated in the SCI is lower than a priority level of the UE; and

transmission times of a sidelink transmission indicated in the SCI is equal to or greater than threshold transmission times.

5. The method of claim 1 , wherein the PI resource is configured on the same time resource as but a different frequency resource from a Hybrid Automatic Repeat Request (HARQ) feedback resource on the PSFCH.

6. The method of claim 1 , wherein the PI resource is configured on the same time and frequency resource as a HARQ feedback transmission resource on the PSFCH, but uses a different cyclic shift from the HARQ feedback transmission resource.

7. The method of claim 1 , wherein the PI resource is configured on a different time resource from a HARQ feedback transmission resource on the PSFCH.

8. The method of claim 1 , wherein the SCI implicitly indicating the PI resource comprises that the SCI includes at least one of: a first indicator for indicating HARQ enabled or disabled, and a second indicator for indicating single sub-channel or a non-single sub-channel; and based on the first indicator indicating the HARQ disabled, the second indicator indicating single sub-channel, or a combination thereof, a HARQ feedback transmission resource on the PSFCH is used as the PI resource and the PI is transmitted on the HARQ feedback transmission resource.

9. The method of claim 1 , wherein a resource pool is divided into a plurality of sub-channels, and each of the plurality of sub-channels is configured to include the PI resource or not.

10. The method of claim 1 , wherein the PI includes one state to indicate that all of the one or more reserved resources will be pre-empted.

11. A user equipment (UE), comprising:

at least one memory; and

at least one processor coupled with the at least one memory and configured to cause the UE to:

receive sidelink control information (SCI) indicating one or more reserved resources, wherein the SCI explicitly or implicitly indicates a pre-emption indication (PI) resource on physical sidelink feedback channel (PSFCH);

determine whether the one or more reserved resources can be pre-empted;

upon determining that the one or more reserved resources can be pre-empted, transmit a PI on the PI resource on the PSFCH to pre-empt the one or more reserved resources; and

perform a sidelink transmission on the pre-empted one or more reserved resources.

12. The UE of claim 11 , wherein the at least one processor is further configured to cause the UE to perform a pre-emption operation based on at least one of:

compared with a resource ratio threshold value of a total number of candidate resources, there is no enough candidate resource in a resource selection window;

compared with a power threshold value, there is no suitable candidate resource in the resource selection window;

after a power is increased in times greater than a maximum increasing threshold number, there is no suitable candidate resource in the resource selection window;

a measured channel busy ratio (CBR) is greater than a CBR threshold value; and

a packet delay budget of the sidelink transmission is less than a delay budget threshold value.

13. The UE of claim 12 , wherein the at least one processor is further configured to cause the UE to:

select a pre-emption reserved resource set, wherein the pre-emption reserved resource set includes the one or more reserved resources; and

report the pre-emption reserved resource set to an upper layer.

14. The UE of claim 11 , wherein the one or more reserved resources can be pre-empted when satisfying at least one condition of:

a priority level indicated in the SCI is lower than a priority level of the UE; and

transmission times of a sidelink transmission indicated in the SCI is equal to or greater than threshold transmission times.

15. The UE of claim 11 , wherein the PI resource is configured on the same time resource as but a different frequency resource from a Hybrid Automatic Repeat Request (HARQ) feedback resource on the PSFCH.

16. The UE of claim 11 , wherein the PI resource is configured on the same time and frequency resource as a HARQ feedback transmission resource on the PSFCH, but uses a different cyclic shift from the HARQ feedback transmission resource.

17. The UE of claim 11 , wherein the PI resource is configured on a different time resource from a HARQ feedback transmission resource on the PSFCH.

18. The UE of claim 11 , wherein the SCI implicitly indicating the PI resource comprises that the SCI includes at least one of: a first indicator for indicating HARQ enabled or disabled, and a second indicator for indicating single sub-channel or a non-single sub-channel; and based on the first indicator indicating the HARQ disabled, the second indicator indicating single sub-channel, or a combination thereof, a HARQ feedback transmission resource on the PSFCH is used as the PI resource and the PI is transmitted on the HARQ feedback transmission resource.

19. The UE of claim 11 , wherein a resource pool is divided into a plurality of sub-channels, and each of the plurality of sub-channels is configured to include the PI resource or not.

20. A processor for wireless communication, comprising:

at least one controller coupled with at least one memory and configured to cause the processor to:

receive sidelink control information (SCI) indicating one or more reserved resources, wherein the SCI explicitly or implicitly indicates a pre-emption indication (PI) resource on physical sidelink feedback channel (PSFCH);

determine whether the one or more reserved resources can be pre-empted;

upon determining that the one or more reserved resources can be pre-empted, transmit a PI on the PI resource on the PSFCH to pre-empt the one or more reserved resources; and

perform a sidelink transmission on the pre-empted one or more reserved resources.

Assignments (1)

Continuity (1)

References Cited (10)