Granted Patent B2

US 12,232,204 · App. 17/738,492 · Granted Feb 18, 2025

Inventor: Hsin-Hsi Tsai (Taipei, TW)

Assignee: SHARP KABUSHIKI KAISHA

H04W76/27H04W72/21H04W74/0833

Abstract

Claims (42)

1. A method for a user equipment (UE) to perform small data transmission (SDT), the method comprising:

receiving, from a base station (BS), system information that includes an SDT configuration, the SDT configuration including an SDT-specific timer;

initiating an SDT procedure when the UE is in a radio resource control (RRC) inactive (RRC_INACTIVE) state;

triggering a Buffer Status Report (BSR) during the SDT procedure;

starting or restarting the SDT-specific timer in response to triggering the BSR; and

determining whether to trigger a scheduling request (SR) based on whether the SDT-specific timer is running after triggering the BSR.

2. The method of claim 1 , further comprising:

triggering the SR when the SDT-specific timer is not running.

3. The method of claim 2 , further comprising:

initiating a random access (RA) procedure after triggering the SR.

4. The method of claim 1 , wherein the system information comprises System Information Block 1 (SIB1).

5. The method of claim 1 , wherein the BSR comprises a regular BSR.

6. The method of claim 1 , further comprising:

receiving, from the BS, an indication during the SDT procedure; and

determining whether to trigger the SR further based on the indication after triggering the BSR.

7. The method of claim 6 , further comprising:

triggering the SR when the indication is set to a specific value.

8. The method of claim 7 , further comprising:

initiating a random access (RA) procedure after triggering the SR.

9. The method of claim 6 , wherein the indication is included in a logical channel configuration received from the BS.

10. A user equipment (UE) for performing small data transmission (SDT), the UE comprising:

at least one processor; and

at least one non-transitory computer-readable medium coupled to the at least one processor and storing computer-executable instructions that, when executed by the at least one processor, cause the UE to:

receive, from a base station (BS), system information that includes an SDT configuration, the SDT configuration including an SDT-specific timer;

initiate an SDT procedure when the UE is in a radio resource control (RRC) inactive (RRC_INACTIVE) state;

trigger a Buffer Status Report (BSR) during the SDT procedure;

start or restart the SDT-specific timer in response to triggering the BSR; and

determine whether to trigger a scheduling request (SR) based on whether the SDT-specific timer is running after triggering the BSR.

11. The UE of claim 10 , wherein the computer-executable instructions, when executed by the at least one processor, further cause the UE to:

trigger the SR when the SDT-specific timer is not running.

12. The UE of claim 11 , wherein the computer-executable instructions, when executed by the at least one processor, further cause the UE to:

initiate a random access (RA) procedure after triggering the SR.

13. The UE of claim 10 , wherein the system information comprises System Information Block 1 (SIB1).

14. The UE of claim 10 , wherein the BSR comprises a regular BSR.

15. The UE of claim 10 , wherein the computer-executable instructions, when executed by the at least one processor, further cause the UE to:

receive, from the BS, an indication during the SDT procedure; and

determine whether to trigger the SR further based on the indication after triggering the BSR.

16. The UE of claim 15 , wherein the computer-executable instructions, when executed by the at least one processor, further cause the UE to:

trigger the SR when the indication is set to a specific value.

17. The UE of claim 16 , wherein the computer-executable instructions, when executed by the at least one processor, further cause the UE to:

initiate a random access (RA) procedure after triggering the SR.

18. The UE of claim 15 , wherein the indication is included in a logical channel configuration received from the BS.

Assignments (2)

Continuity (2)

References Cited (14)