US-20260129523-A1 - METHOD AND ELECTRONIC DEVICE FOR PERFORMING MIGRATION OPERATION FOR DISTRIBUTED UNIT SCALING

Abstract

A method performed by an electronic device may include migrating a cell context for a target cell included in a first distributed unit (DU) to a second DU, configuring a connection between a first RLC layer and a second MAC layer for the target cell, migrating, from the first RLC layer to a second RLC layer, user equipment (UE) context for a target UE among UE contexts for a plurality of UEs associated with the target cell, and switching a F1-U interface for the target UE, from the first DU to the second DU, to configure a connection between the second RLC layer and the second MAC layer.

Inventors

• Hanjung PARK
• Youngki Hong
• Seonjun PARK
• Heungseop AHN

Assignees

• SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date

20260507

Application Date

20251229

Priority Date

20230629

Claims (20)

1. 1 . A method performed by an electronic device, the method comprising: migrating a cell context for a target cell, the cell context being included in at least one of a first radio link control (RLC) layer, a first medium access control (MAC) layer or a first physical (PHY) layer, to at least one of a second RLC layer, a second MAC layer or a second PHY layer, the first MAC layer, the first RLC layer, and the first PHY layer being in a first distributed unit (DU), and the second MAC layer, the second RLC layer, and the second PHY layer being in a second DU; configuring, for the target cell, a connection between the first RLC layer and the second MAC layer, and identifying whether the target cell is in a state of being available for communication; migrating, from the first RLC layer to the second RLC layer, user equipment (UE) contexts for one or more target UEs among UE contexts for a plurality of UEs associated with the target cell; and switching a F1-U interface for the one or more target UEs from the first DU to the second DU, and configuring a connection between the second RLC layer and the second MAC layer for the one or more target UEs.
2. 2 . The method of claim 1 , further comprising: based on the migrating of the cell context for the target cell, switching a fronthaul interface for the target cell from the first DU to the second DU.
3. 3 . The method of claim 1 , further comprising: based on the migrating of the cell context for the target cell, migrating the UE contexts for the plurality of UEs included in at least one of the first MAC layer or the first PHY layer to at least one of the second MAC layer or the second PHY layer.
4. 4 . The method of claim 1 , further comprising: based on identifying that the target cell is in the state of being available for communication, removing the cell context for the target cell and the UE contexts for the plurality of UEs from at least one of the first MAC layer or the first PHY layer.
5. 5 . The method of claim 1 , wherein the migrating, from the first RLC layer to the second RLC layer, the UE contexts for the one or more target UEs comprises selecting the one or more target UEs from among the plurality of UEs.
6. 6 . The method of claim 1 , further comprising: based on the migrating, from the first RLC layer to the second RLC layer, the UE contexts for the one or more target UEs, removing the UE contexts for the one or more target UEs from the first RLC layer.
7. 7 . The method of claim 1 , further comprising: based on the migrating, from the first RLC layer to the second RLC layer, the UE contexts for the one or more target UEs, removing the cell context for the target cell from the first RLC layer.
8. 8 . The method of claim 1 , further comprising: identifying a determination of a scaling-out for the first DU or a determination of a scaling-in for the first DU.
9. 9 . The method of claim 8 , further comprising: based on the identifying of the determination of the scaling-out for the first DU, generating the second DU and configuring a midhaul interface between the second DU and a centralized unit (CU).
10. 10 . The method of claim 8 , further comprising: based on identifying that the target cell is not in the state of being available for communication, re-performing migration of the cell context for the target cell from at least one of the first RLC layer, the first MAC layer or the first PHY layer to at least one of the second RLC layer, the second MAC layer or the second PHY layer.
11. 11 . A non-transitory computer-readable recording medium having recorded thereon a program that is executed by at least one processor of an electronic device to perform the method of claim 1 .
12. 12 . An electronic device comprising: memory storing one or more instructions; and at least one processor configured to execute the one or more instructions stored in the memory, wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to: migrate a cell context for a target cell, the cell context being included in at least one of a first radio link control (RLC) layer, a first medium access control (MAC) layer or a first physical (PHY) layer, to at least one of a second RLC layer, a second MAC layer or a second PHY layer, the first RLC layer, the first MAC layer, and the first PHY layer being in a first distributed unit (DU), and the second RLC layer, the second MAC layer, and the second PHY layer being in a second DU, configure, for the target cell, a connection between the first RLC layer and the second MAC layer, and identify whether the target cell is in a state of being available for communication, migrate, from the first RLC layer to the second RLC layer, user equipment (UE) contexts for one or more target UEs among UE contexts for a plurality of UEs associated with the target cell, and switch a F1-U interface for the one or more target UEs from the first DU to the second DU, and configure a connection between the second RLC layer and the second MAC layer for the one or more target UEs.
13. 13 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to, based on the cell context for the target cell being migrated, switch a fronthaul interface for the target cell from the first DU to the second DU.
14. 14 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to, based on the cell context for the target cell being migrated, migrate the UE contexts for the plurality of UEs included in at least one of the first MAC layer or the first PHY layer to at least one of the second MAC layer or the second PHY layer.
15. 15 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to, based on the target cell being identified as in the state of being available for communication, remove the cell context for the target cell and the UE contexts for the plurality of UEs from at least one of the first MAC layer or the first PHY layer.
16. 16 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to select the one or more target UEs from among the plurality of UEs.
17. 17 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to: based on the UE contexts for the one or more target UEs being migrated from the first RLC layer to the second RLC layer, remove the UE contexts for the one or more target UEs from the first RLC layer.
18. 18 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to: based on the UE contexts for the one or more target UEs being migrated from the first RLC layer to the second RLC layer, remove the cell context for the target cell from the first RLC layer.
19. 19 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to identify a determination of a scaling-out for the first DU or a determination of a scaling-in for the first DU.
20. 20 . The electronic device of claim 12 , wherein the one or more instructions, when executed by the at least one processor individually or collectively, cause the electronic device to: based on the target cell being identified as not in the state of being available for communication, re-perform migration of the cell context for the target cell from at least one of the first RLC layer, the first MAC layer or the first PHY layer to at least one of the second RLC layer, the second MAC layer or the second PHY layer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a bypass continuation application of International Application No. PCT/KR2024/008643, filed on Jun. 21, 2024, which claims priority to Korean Patent Application No. 10-2023-0084484, filed on Jun. 29, 2023, and Korean Patent Application No. 10-2023-0114605, filed on Aug. 30, 2023, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. BACKGROUND 1. Field The present disclosure relates to a method and electronic device for performing a migration operation for distributed unit (DU) scaling. 2. Description of Related Art In communication industries, technologies for a virtualized radio access network (RAN), i.e., vRAN, are growing rapidly. The existing hardware-based RAN requires specific hardware to perform each function for communication, and mobile carriers have needed to build a RAN with hardware components from the same manufacturer because of issues such as hardware compatibility. On the other hand, vRAN is not hardware-based but software-based RAN, and functions for communication of vRAN may be performed with software components. In other words, vRAN has no need for specific hardware to perform functions for communication, and the software components of vRAN may be executed by a universal server device to perform functions for communication. Accordingly, mobile carriers do not depend on products from a single manufacturer but use products from various manufacturers to build vRAN. SUMMARY The present disclosure may be implemented in various ways including a method, a system, a device or a computer program stored in a computer-readable storage medium. According to an aspect of the disclosure, a method performed by an electronic device may be provided. The method may include migrating a cell context for a target cell, the cell context being included in at least one of a first radio link control (RLC) layer, a first medium access control (MAC) layer or a first physical (PHY) layer, to at least one of a second RLC layer, a second MAC layer or a second PHY layer, the first MAC layer, the first RLC layer, and the first PHY layer being in a first distributed unit (DU), and the second MAC layer, the second RLC layer, and the second PHY layer being in a second DU; configuring, for the target cell, a connection between the first RLC layer and the second MAC layer, and identifying whether the target cell is in a state of being available for communication; migrating, from the first RLC layer to the second RLC layer, user equipment (UE) contexts for one or more target UEs among UE contexts for a plurality of UEs associated with the target cell; and switching a F1-U interface for the one or more target UEs from the first DU to the second DU, and configuring a connection between the second RLC layer and the second MAC layer for the one or more target UEs. The method may further include, based on the migrating of the cell context for the target cell, switching a fronthaul interface for the target cell from the first DU to the second DU. The method may further include, based on the migrating of the cell context for the target cell, migrating the UE contexts for the plurality of UEs included in at least one of the first MAC layer or the first PHY layer to at least one of the second MAC layer or the second PHY layer. The method may further include, based on identifying that the target cell is in the state of being available for communication, removing the cell context for the target cell and the UE contexts for the plurality of UEs from at least one of the first MAC layer or the first PHY layer. The migrating, from the first RLC layer to the second RLC layer, the UE contexts for the one or more target UEs comprises selecting the one or more target UEs from among the plurality of UEs. The method may further include, based on the migrating, from the first RLC layer to the second RLC layer, the UE contexts for the one or more target UEs, removing the UE contexts for the one or more target UEs from the first RLC layer. The method may further include, based on the migrating, from the first RLC layer to the second RLC layer, the UE contexts for the one or more target UEs, removing the cell context for the target cell from the first RLC layer. The method may further include, identifying a determination of a scaling-out for the first DU or a determination of a scaling-in for the first DU. The method may further include, based on the identifying of the determination of the scaling-out for the first DU, generating the second DU and configuring a midhaul interface between the second DU and a centralized unit (CU). The method may further include, based on the identifying the determination of the scaling-in for the first DU, configuring a midhaul interface between the second DU and a CU. The method further includes, based on identifying that the target cell is not in the state of being available for communi