Granted Patent B2

US 12,225,580 · App. 17/805,203 · Granted Feb 11, 2025

Inventor: Hao Lin (Neuilly-sur-seine, FR)

Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

H04W74/0808H04L27/2607H04W74/006

Abstract

Claims (37)

1. A method, performed by a user equipment (UE), for determining a cyclic prefix extension (CPE) when the UE switches a Listen-Before-Talk (LBT) category of the UE from a first LBT category to a second LBT category in base station channel occupancy time (gNB COT), comprising:

determining the CPE based on a first information amongst at least one of the following:

CPE indication carried in a first downlink control information (DCI), if an uplink (UL) transmission is scheduled with the first DCI; or

pre-defined CPE indication.

2. The method according to claim 1 , wherein the first DCI is chosen amongst one of the following formats:

DCI format 0_1, DCI format 1_1, DCI format 0_0, or DCI format 1_0.

3. The method according to claim 2 , wherein the CPE is indicated in the first DCI, the method further comprising:

using the indicated CPE when performing the second LBT category in gNB COT.

4. The method according to claim 2 , wherein the CPE is indicated in the first DCI, the method further comprising:

using the indicated CPE when UE performs the second LBT category in gNB COT, if a first condition is satisfied, the first condition being that the indicated CPE contains a gap duration which is equal to a first gap duration of the second LBT category.

5. The method according to claim 4 , wherein the first gap duration is 25 us or 16 us.

6. The method according to claim 1 , further comprising:

determining the CPE, when performing the second LBT category in gNB COT, by a predefined CPE.

7. The method according to claim 6 , wherein the predefined CPE is a direct CPE value or a predefined CPE formula with parameters being further determined by UE-specific or cell-specific RRC configurations.

8. The method according to claim 1 , wherein the first LBT category is type1-UL channel access or Category 4 (Cat4), the second LBT category is type 2C UL channel access or type 2B channel access or type 2A channel access.

9. The method according to claim 8 , wherein the type 2C UL channel access is category 1 (Cat1) with 16 μs gap duration, the type 2B channel access is category 2 with 16 μs gap duration and the type 2A channel access is category 2 (Cat2) with 25 μs gap duration.

10. A user equipment (UE), operable for determining a cyclic prefix extension (CPE) when the UE switches a Listen-Before-Talk (LBT) category of the UE from a first LBT category to a second LBT category in base station channel occupancy time (gNB COT), comprising one or more processors configured to:

determine the CPE based on a first information amongst at least one of the following:

CPE indication carried in a first downlink control information (DCI), if an uplink (UL) transmission is scheduled with the first DCI; or

pre-defined CPE indication.

11. The UE according to claim 10 , wherein the first DCI is chosen amongst one of the following formats:

DCI format 0_1, DCI format 1_1, DCI format 0_0, or DCI format 1_0.

12. The UE according to claim 11 , wherein the CPE is indicated in the first DCI, and the one or more processors are further configured to:

use the indicated CPE when performing the second LBT category in gNB COT.

13. The UE according to claim 11 , wherein the CPE is indicated in the first DCI, and the one or more processors are further configured to:

use the indicated CPE when the UE performs the second LBT category in gNB COT, if a first condition is satisfied, the first condition being that the indicated CPE contains a gap duration which is equal to a first gap duration of the second LBT category.

14. The UE according to claim 13 , wherein the first gap duration is 25 us or 16 us.

15. The UE according to claim 10 , wherein the one or more processors are further configured to:

determine the CPE, when performing the second LBT category in gNB COT, by a predefined CPE.

16. The UE according to claim 15 , wherein the predefined CPE is a direct CPE value or a predefined CPE formula with parameters being further determined by UE- specific or cell-specific RRC configurations.

17. The UE according to claim 10 , wherein the first LBT category is type1-UL channel access or Category 4 (Cat4), the second LBT category is type 2C UL channel access or type 2B channel access or type 2A channel access.

18. The UE according to claim 17 , wherein the type 2C UL channel access is category 1 (Cat1) with 16 μs gap duration, the type 2B channel access is category 2 with 16 μs gap duration and the type 2A channel access is category 2 (Cat2) with 25 μs gap duration.

19. A non-transitory computer readable medium comprising program instructions for causing a user equipment (UE) to perform a method for determining a cyclic prefix extension (CPE) when the UE switches a Listen-Before-Talk (LBT) category of the UE from a first LBT category to a second LBT category in base station channel occupancy time (gNB COT), the method comprising:

determining the (CPE) based on a first information amongst at least one of the following:

pre-defined CPE indication.

20. The non-transitory computer readable medium according to claim 19 , wherein the first DCI is chosen amongst one of the following formats:

DCI format 0_1, DCI format 1_1, DCI format 0_0, or DCI format 1_0.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (22)