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EP-4738911-A1 - METHOD AND ELECTRONIC DEVICE FOR PERFORMING MIGRATION OPERATION FOR DISTRIBUTED UNIT (DU) SCALING

EP4738911A1EP 4738911 A1EP4738911 A1EP 4738911A1EP-4738911-A1

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 an RLC layer of the first DU and a MAC layer of the second DU for the target cell, migrating a user equipment (UE) context for a target UE, among UE contexts for a plurality of UEs associated with the target cell and included in the RLC layer of the first DU, to the RLC layer of the second DU, and switching an F1-U interface for the target UE to the second DU from the first DU and configuring a connection between the RLC layer and the MAC layer in the second DU for the target UE.

Inventors

  • PARK, HANJUNG
  • HONG, YOUNGKI
  • PARK, SEONJUN
  • AHN, Heungseop

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240621

Claims (15)

  1. A method performed by an electronic device, the method comprising: migrating a cell context for a target cell included in at least one of a radio link control (RLC) layer, a medium access control (MAC) layer or a physical (PHY) layer in a first distributed unit (DU) to at least one of an RLC layer, an MAC layer or a PHY layer in a second DU; configuring a connection between the RLC layer of the first DU and the MAC layer of the second DU, for the target cell, and identifying that the target cell is in a state of being available for communication; migrating user equipment (UE) contexts for one or more target UEs, among UE contexts for a plurality of UEs associated with the target cell and included in the RLC layer of the first DU, to the RLC layer of the second DU; and switching an F1-U interface for the one or more target UEs to the second DU from the first DU, and configuring a connection between the RLC layer and the MAC layer in the second DU, for the one or more target UEs.
  2. The method of claim 1, further comprising: switching a fronthaul interface for the target cell from the first DU to the second DU, based on migration of a cell context for the target cell.
  3. The method of claim 1 or 2, further comprising: migrating UE contexts for the plurality of UEs included in at least one of the MAC layer or the PHY layer of the first DU to at least one of the MAC layer or the PHY layer of the second DU, based on the migration of the cell context for the target cell.
  4. The method of any one of claims 1 to 3, further comprising: removing the cell context for the target cell and the UE contexts for the plurality of UEs from at least one of the MAC layer or the PHY layer of the first DU, based on identifying that the target cell is in a state of being available for communication.
  5. The method of any one of claims 1 to 4, further comprising: selecting the one or more target UEs from among the plurality of UEs.
  6. The method of any one of claims 1 to 5, further comprising: removing the UE contexts for the one or more target UEs from the RLC of the first DU, based on migration of the UE contexts for the one or more target UEs.
  7. The method of any one of claims 1 to 6, further comprising: removing the cell context for the target cell from the RLC of the first DU, based on completion of migration of the UE contexts for the plurality of UEs to the RLC of the second DU.
  8. The method of any one of claims 1 to 7, further comprising: identifying a determination of a scaling-out for the first DU.
  9. The method of any one of claims 1 to 8, further comprising: based on 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) for the first DU.
  10. The method of any one of claims 1 to 7, further comprising: identifying a determination of a scaling-in for the first DU.
  11. A computer-readable recording medium having a program recorded thereon to cause a computer to perform the method of any of claims 1 to 10.
  12. An electronic device (1100) comprising: memory (1120) storing one or more instructions; and at least one processor (1110) configured to execute the one or more instructions stored in the memory (1120), wherein the at least one processor (1110) is configured to execute the one or more instructions to migrate a cell context for a target cell included in at least one of a radio link control (RLC) layer, a medium access control (MAC) layer or a physical (PHY) layer in a first distributed unit (DU) to at least one of an RLC layer, an MAC layer or a PHY layer in a second DU, configure a connection between the RLC layer of the first DU and the MAC layer of the second DU, for the target cell, and identify that the target cell is in a state of being available for communication, migrate user equipment (UE) contexts for one or more target UEs, among UE contexts for a plurality of UEs associated with the target cell and included in the RLC layer of the first DU, to the RLC layer of the second DU, and switch an F1-U interface for the one or more target UEs from the first DU to the second DU, and configure a connection between the RLC layer and the MAC layer in the second DU, for the one or more target UEs.
  13. The electronic device of claim 12, wherein the at least one processor (1110) is configured to switch a fronthaul interface for the target cell from the first DU to the second DU, based on migration of the cell context for the target cell.
  14. The electronic device of claim 12 or 13, wherein the at least one processor (1110) is configured to migrate UE contexts for the plurality of UEs included in at least one of the MAC layer or PHY layer of the first DU to at least one of the MAC layer or PHY layer of the second DU, based on the migration of the cell context for the target cell.
  15. The electronic device of any one of claims 12 to 14, wherein the at least one processor (1110) is configured to remove the cell context for the target cell and the UE contexts for the plurality of UEs from at least one of the MAC layer or the PHY layer of the first DU, based on identifying that the target cell is in a state of being available for communication.

Description

Technical Field The present disclosure relates to a method and electronic device for performing a migration operation for distributed unit (DU) scaling. Background 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. Disclosure of Invention Solution to Problem 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. In an embodiment of the present disclosure, a method performed by an electronic device may include migrating a cell context for a target cell included in at least one of a radio link control (RLC) layer, a medium access control (MAC) layer or a physical (PHY) layer in a first distributed unit (DU) to at least one of an RLC layer, an MAC layer or a PHY layer in a second DU. In an embodiment of the present disclosure, the method may include configuring a connection between the RLC layer of the first DU and the MAC layer of the second DU for the target cell, and identifying that the target cell is in a state of being available for communication. In an embodiment of the present disclosure, the method may include migrating user equipment (UE) contexts for one or more target UEs among UE contexts for a plurality of UEs associated with the target cell, which are included in the RLC layer of the first DU, to the RLC layer of the second DU. In an embodiment of the present disclosure, the method may include switching an F1-U interface for the one or more target UEs to the second DU from the first DU, and configuring a connection between the RLC layer and the MAC layer in the second DU for the one or more target UEs. In an embodiment of the present disclosure, a program for causing a computer to perform the method may be recorded on a computer-readable recording medium. In an embodiment of the present disclosure, an electronic device may include a memory storing one or more instructions and at least one processor configured to execute the one or more instructions stored in the memory. In an embodiment of the present disclosure, the at least one processor may execute the one or more instructions to migrate a cell context for a target cell included in at least one of an RLC layer, an MAC layer or a PHY layer in a first DU to at least one of an RLC layer, an MAC layer or a PHY layer in a second DU. In an embodiment of the present disclosure, the at least one processor may execute the one or more instructions to configure a connection between the RLC layer of the first DU and the MAC layer of the second DU for the target cell, and identify that the target cell is in a state of being available for communication. In an embodiment of the present disclosure, the at least one processor may execute the one or more instructions to migrate UE contexts for one or more target UEs among UE contexts for a plurality of UEs associated with the target cell, which are included in the RLC layer of the first DU, to the RLC layer of the second DU. In an embodiment of the present disclosure, the at least one processor may execute the one or more instructions to switch an F1-U interface for the one or more target UEs to the second DU from the first DU, and configure a connection between the RLC layer and the MAC layer in the second DU for the one or more target UEs. Brief Description of Drawings FIG. 1 is a diagram illustrating an example of a wireless communication system architecture according to an embodiment of the present disclosure.FIG. 2 is a diagram illustrating an example of performing DU scaling in a radio access network (RAN), according to an embodiment of the present disclosure.FIG. 3 is a diagram illustrating an example of performing DU scaling-out in a RAN, according to an embodiment of the present disclosure.FIG. 4 is a diagram illustrating an example in which an electronic device determines scaling-out for a first DU, according to an embodiment of the present disclosure.FIGS. 5 to 7 are diagrams illustrating examples in which an electronic device performs cell migration for DU scaling-out, according to an embodiment of the present disclosure.FIG. 8 is a diagram illustrating an example of per