Granted Patent B2

US 12,452,942 · App. 18/680,291 · Granted Oct 21, 2025

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

Assignee: Samsung Electronics Co., Ltd.

H04W76/15H04W28/0257H04W76/11H04W76/12H04W76/27H04W80/08H04W84/20

Abstract

Claims (42)

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

receiving, from a master base station, secondary base station setup request information;

transmitting, from a control plane (CP) of the CU entity to a user plane (UP) of the CU entity, a first setup request message based on the secondary base station setup request information;

receiving, from the UP to the CP, a first setup response message as a response to the first setup request message; and

transmitting, to a distributed unit (DU) entity of the secondary base station, a second setup request message for bearer setup in response to the first setup response message;

wherein the first setup request message includes duplication activation information on state of downlink (DL) packet data convergence protocol (PDCP) duplication.

2. The method of claim 1 , wherein the first setup request message comprises at least one of an identifier corresponding to a user equipment (UE), security information of a PDCP, transport layer information for uplink data, or PDCP configuration information.

3. The method of claim 2 , wherein the transport layer information for uplink data includes a transport layer address and a tunnel endpoint identifier (TEID).

4. The method of claim 1 , wherein the second setup request message for bearer setup comprises at least one of an identifier of a data radio bearer (DRB), or transport layer information for uplink data.

5. The method of claim 1 , further comprising receiving, from the DU entity, a second setup response message as a response to the second setup request message for bearer setup.

6. The method of claim 5 , wherein the second setup response message comprises transport layer information for downlink data.

7. The method of claim 1 , further comprising:

transmitting, from the CP to the UP, a modification request message comprising transport layer information for downlink data; and

receiving, from the UP to the CP, a modification response message as a response to the modification request message.

8. A central unit (CU) entity of a secondary base station in a wireless communication system, the CU entity comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

receive from a master base station, secondary base station setup request information,

transmit, from a control plane (CP) of the CU entity to a user plane (UP) of the CU entity, a first setup request message based on the secondary base station setup request information,

receive, from the UP to the CP, a first setup response message as a response to the first setup request message, and

transmit, to a distributed unit (DU) entity of the secondary base station, a second setup request message for bearer setup in response to the first setup response message,

wherein the first setup request message includes duplication activation information on state of downlink (DL) packet data convergence protocol (PDCP).

9. The CU entity of claim 8 , wherein the first setup request message comprises at least one of an identifier corresponding to a user equipment (UE), security information of a PDCP, transport layer information for uplink data, or PDCP configuration information.

10. The CU entity of claim 9 , wherein the transport layer information for uplink data includes a transport layer address and a tunnel endpoint identifier (TEID).

11. The CU entity of claim 8 , wherein the second setup request message for bearer setup comprises at least one of an identifier of a data radio bearer (DRB), or transport layer information for uplink data.

12. The CU entity of claim 8 , wherein the at least one processor is further configured to:

receive, by the CP, from the DU entity, a second setup response message as a response to the second setup request message for bearer setup.

13. The CU entity of claim 12 , wherein the second setup response message comprises transport layer information for downlink data.

14. The CU entity of claim 9 , wherein the at least one processor is further configured to:

transmit, by the CP, to the UP, a modification request message comprising transport layer information for downlink data, and

receive, by the CP, from the UP, a modification response message as a response to the modification request message.

15. A central unit (CU) entity of a secondary base station in a wireless communication system performing a method of a user plane (UP), the CU entity comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

receive, by the UP, from a control plane (CP) of the CU entity, a first setup request message based on secondary base station setup request information, and

transmit, by the UP, to the CP, a first setup response message as a response to the first setup request message,

wherein the CP transmits, to a distributed unit (DU) entity of the secondary base station, a second setup request message for bearer setup in response to the first setup response message, and

wherein the first setup request message includes duplication activation information on state of downlink (DL) packet data convergence protocol (PDCP) duplication.

16. The CU entity of claim 15 , wherein the first setup request message comprises at least one of an identifier corresponding to a user equipment (UE), security information of a PDCP, transport layer information for uplink data, or PDCP configuration information.

17. The CU entity of claim 16 , wherein the transport layer information for uplink data includes a transport layer address and a tunnel endpoint identifier (TEID).

18. The CU entity of claim 15 , wherein the at least one processor is further configured to:

transmit, to a distributed unit (DU) entity of the secondary base station, a second setup request message for bearer setup in response to the first setup response message.

Priority Claims (1)

Continuity (4)

References Cited (43)