Granted Patent B2

US 12,470,986 · App. 17/881,133 · Granted Nov 11, 2025

Inventors: Weiwei Wang (Beijing, CN); Hong Wang (Beijing, CN); Lixiang Xu (Beijing, CN)

Assignee: Samsung Electronics Co., Ltd.

H04W36/0033

Abstract

Claims (43)

1 . A method performed by a central unit (CU) of a first base station in a wireless communication system, the method comprising:

receiving, from a distributed unit (DU) of the first base station, a first message including information for requesting a termination of a first small data transmission (SDT) for a user equipment (UE) in a radio resource control (RRC) inactive state, wherein the information includes an indication for an uplink (UL) data size larger than a size for the first SDT; and

performing the termination of the first SDT for the UE based on the information included in the first message,

wherein a RRC resume procedure for the UE is based on the indication included in the information.

2 . The method of claim 1 , further comprising:

receiving, from a second base station, a second message including second information for requesting a termination of a second SDT,

wherein the second SDT corresponds to a random access (RA) based SDT without UE context relocation, and

wherein the first base station corresponds to a last serving next generation node B (gNB) for the UE and the second base station corresponds to a current serving gNB for the UE.

3 . The method of claim 1 , wherein the first SDT corresponds to a configured grant (CG) SDT based on a CG configuration.

4 . A central unit (CU) of a first base station in a wireless communication system, the CU comprising:

at least one transceiver;

at least one processor communicatively coupled to the at least one transceiver; and

at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the CU to:

receive, from a distributed unit (DU) of the first base station, a first message including information for requesting a termination of a first small data transmission (SDT) for a user equipment (UE) in a radio resource control (RRC) inactive state, wherein the information includes an indication for an uplink (UL) data size larger than a size for the first SDT, and

perform the termination of the first SDT for the UE based on the information included in the first message,

wherein a RRC resume procedure for the UE is based on the indication included in the information.

5 . The CU of claim 4 ,

wherein the instructions further cause the CU to:

receive, from a second base station, a second message including second information for requesting a termination of a second SDT,

wherein the second SDT corresponds to a random access (RA) based SDT without UE context relocation, and

wherein the first base station corresponds to a last serving next generation node B (gNB) for the UE and the second base station corresponds to a current serving gNB for the UE.

6 . The CU of claim 4 , wherein the first SDT corresponds to a configured grant (CG) SDT based on a CG configuration.

7 . A method performed by a distributed unit (DU) of a first base station in a wireless communication system, the method comprising:

identifying that a termination of a first small data transmission (SDT) is required for a user equipment (UE) in a radio resource control (RRC) inactive state; and

transmitting, to a central unit (CU) of the first base station, a first message including information for requesting the termination of the first SDT, wherein the information includes an indication for an uplink (UL) data size larger than a size for the first SDT,

wherein the termination of the first SDT is based on the information included in the first message, and

wherein a RRC resume procedure for the UE is based on the indication included in the information.

8 . The method of claim 7 , wherein a termination of a second SDT corresponding to a random access (RA) based SDT without UE context relocation is based on a second message including second information for requesting the termination of the second SDT.

9 . The method of claim 8 , wherein the first base station corresponds to a last serving next generation node B (gNB) for the UE.

10 . The method of claim 7 , wherein the first SDT corresponds to a configured grant (CG) SDT based on a CG configuration.

11 . A distributed unit (DU) of a first base station in a wireless communication system, the DU comprising:

at least one transceiver;

at least one processor communicatively coupled to the at least one transceiver; and

at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the DU:

identify that a termination of a first small data transmission (SDT) is required for a user equipment (UE) in a radio resource control (RRC) inactive state, and

transmit, to a central unit (CU) of the first base station, a first message including information for requesting the termination of the first SDT,

wherein the information includes an indication for an uplink (UL) data size larger than a size for the first SDT,

wherein the termination of the first SDT is based on the information included in the first message, and

wherein a RRC resume procedure for the UE is based on the indication included in the information.

12 . The DU of claim 11 ,

wherein a termination of a second SDT corresponding to a random access (RA) based SDT without UE context relocation is based on a second message including second information for requesting the termination of the second SDT, and

wherein the first base station corresponds to a last serving next generation node B (gNB) for the UE.

13 . The DU of claim 11 , wherein the first SDT corresponds to a configured grant (CG) SDT based on a CG configuration.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (28)