IP Library › Granted Patent US 12,610,423
Granted Patent B2
US 12,610,423 · App. 18/431,445 · Granted Apr 21, 2026

RRC release after small data transmission completion

Inventors: Kyungmin Park (Vienna, VA); Esmael Hejazi Dinan (McLean, VA); Taehun Kim (Fairfax, VA); Hyoungsuk Jeon (Centreville, VA); Jinsook Ryu (Oakton, VA); Peyman Talebi Fard (Vienna, VA)
Assignee: Bloomsbury Design Labs LLC
H04W76/27H04W72/231
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Quick Facts
Patent No.
US 12,610,423
App. No.
18/431,445
Granted
Apr 21, 2026
Kind
B2
Abstract

A wireless device receives a radio resource control (RRC) message comprising configuration parameters for uplink resources associated with a small data transmission (SDT) procedure of the wireless device. The wireless device transmits, to a base station central unit (BS-CU) via the uplink resources of a base station distributed unit (BS-DU), an RRC resume request message for the SDT procedure, and uplink data associated with the SDT procedure. The wireless device receives, from the BS-CU to via the BS-DU, an RRC release message after the BS-CU receives a message indicating inactivity notification and completion of the SDT procedure.

Claims (56)

1 . A wireless device, comprising one or more processors and memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive a radio resource control (RRC) message comprising configuration parameters for uplink resources associated with a small data transmission (SDT) of the wireless device;

use the uplink resources to transmit, to a base station central unit (BS-CU) via of a base station distributed unit (BS-DU):

an RRC resume request message for the SDT; and

uplink data associated with the SDT; and

receive, from the BS-CU via the BS-DU, an RRC release message after the BS-CU receives a message indicating inactivity notification and termination of the SDT.

2 . The wireless device of claim 1 , wherein the BS-CU comprises a BS-CU control plane (BS-CU-CP).

3 . The wireless device of claim 1 , wherein the RRC release message is based on the completion of the SDT procedure.

4 . The wireless device of claim 1 , wherein the RRC release message indicates that the wireless device stays in an RRC inactive state or an RRC idle state.

5 . The wireless device of claim 1 , wherein the RRC release message comprises configuration parameters for suspension of an RRC connection.

6 . The wireless device of claim 1 , wherein the receiving the RRC release message comprises receiving the RRC release message within a context release command message.

7 . The wireless device of claim 1 , wherein the SDT procedure comprises one or more of:

an initial uplink data transmission;

an initial downlink data transmission; or

at least one subsequent data transmission.

8 . A method comprising:

receiving, by a wireless device, a radio resource control (RRC) message comprising configuration parameters for uplink resources associated with a small data transmission (SDT) of the wireless device;

using the uplink resources to transmit, by the wireless device to a base station central unit (BS-CU) via of a base station distributed unit (BS-DU):

an RRC resume request message for the SDT; and

uplink data associated with the SDT; and

receiving, by the wireless device from the BS-CU via the BS-DU, an RRC release message after the BS-CU receives a message indicating inactivity notification and termination of the SDT.

9 . The method of claim 8 , wherein the BS-CU comprises a BS-CU control plane (BS-CU-CP).

10 . The method of claim 8 , wherein the RRC release message is based on the completion of the SDT procedure.

11 . The method of claim 8 , wherein the RRC release message indicates that the wireless device stays in an RRC inactive state or an RRC idle state.

12 . The method of claim 8 , wherein the RRC release message comprises configuration parameters for suspension of an RRC connection.

13 . The method of claim 8 , wherein the receiving the RRC release message comprises receiving the RRC release message within a context release command message.

14 . The method of claim 8 , wherein the SDT procedure comprises one or more of:

an initial uplink data transmission;

an initial downlink data transmission; or

at least one subsequent data transmission.

15 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause a wireless device to:

receive a radio resource control (RRC) message comprising configuration parameters for uplink resources associated with a small data transmission (SDT) of the wireless device;

use the uplink resources to transmit, to a base station central unit (BS-CU) via a base station distributed unit (BS-DU):

an RRC resume request message for the SDT; and

uplink data associated with the SDT; and

receive, from the BS-CU via the BS-DU, an RRC release message after the BS-CU receives a message indicating inactivity notification and termination of the SDT.

16 . The computer-readable medium of claim 15 , wherein the BS-CU comprises a BS-CU control plane (BS-CU-CP).

17 . The computer-readable medium of claim 15 , wherein the RRC release message is based on the completion of the SDT procedure.

18 . The computer-readable medium of claim 15 , wherein the RRC release message indicates that the wireless device stays in an RRC inactive state or an RRC idle state.

19 . The computer-readable medium of claim 15 , wherein the RRC release message comprises configuration parameters for suspension of an RRC connection.

20 . The computer-readable medium of claim 15 , wherein the receiving the RRC release message comprises receiving the RRC release message within a context release command message.

21 . A processor for a wireless device, configured to:

process a radio resource control (RRC) message comprising configuration parameters for uplink resources associated with a small data transmission (SDT) of the wireless device;

use the uplink resources to send, from the wireless device to a base station central unit (BS-CU) via a base station distributed unit (BS-DU):

an RRC resume request message for the SDT; and

uplink data associated with the SDT; and

process, after the BS-CU receives a message indicating inactivity notification and termination of the SDT, an RRC release message from the BS-CU via the BS-DU.

22 . The processor of claim 21 , wherein the BS-CU comprises a BS-CU control plane (BS-CU-CP).

23 . The processor of claim 21 , wherein the RRC release message is based on the completion of the SDT procedure.

24 . The processor of claim 21 , wherein the RRC release message indicates that the wireless device stays in an RRC inactive state or an RRC idle state.

25 . The processor of claim 21 , wherein the RRC release message comprises configuration parameters for suspension of an RRC connection.

26 . The processor of claim 21 , wherein the RRC release message is received at the wireless device within a context release command message.

27 . The processor of claim 21 , wherein the SDT procedure comprises one or more of:

an initial uplink data transmission;

an initial downlink data transmission; and

at least one subsequent data transmission.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 3, 2025
From: OFINNO, LLC
To: BLOOMSBURY DESIGN LABS LLC
Reel/Frame 072764/0532 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 23, 2024
From: PARK, KYUNGMIN; DINAN, ESMAEL HEJAZI; KIM, TAEHUN; JEON, HYOUNGSUK; RYU, JINSOOK; TALEBI FARD, PEYMAN
To: OFINNO, LLC
Reel/Frame 066543/0514 →
Continuity (4)
Continuation 17960387 · Oct 5, 2022
Continuation PCTUS2021051728 · Sep 23, 2021
Provisional Application 63083026 · Sep 24, 2020
Related Publication 20240179787A1 · May 30, 2024
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