# US 2026/0075475 A1 · Electronic device and method for communication between distributed units in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0075475 A1 - Document ID: US20260075475A1 - Status: Published application - Kind: A1 - Application number: 19/392,868 - Filed: 2025-11-18 - Published: 2026-03-12 - Earliest claimed: 2023-05-19 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Seungbo YOO; Hyungtaig LIM - Web page: https://patentgrep.com/patent/US20260075475A1 ## CPC - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 36/00692: {using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO] (allocation of physical resources in CoMP or in CA H04L5/0035)} - H04W 36/00835: {Determination of neighbour cell lists} - H04W 72/27: between access points - H04W 76/15: Setup of multiple wireless link connections - H04W 88/085: {Access point devices with remote components} - H04W 92/20: between access points - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method performed by a first distributed unit (DU) is provided. The method includes transmitting, to a second DU, a setup request message through a communication interface between the first DU and a second DU and receiving, from the second DU, a setup response message, from the second DU, and wherein the setup response message includes at least one of identification information related to the second DU and address information related to the second DU. ## Claims ### Claim 1 A method performed by a first distributed unit (DU), the method comprising: transmitting, to a second DU, a setup request message through a communication interface between the first DU and the second DU; and receiving, from the second DU, a setup response message, wherein the setup request message includes at least one of identification information related to the first DU or cell information for each cell provided by the first DU, and wherein the setup response message includes at least one of identification information related to the second DU or address information related to the second DU. ### Claim 2 (depends on 1) The method of claim 1, wherein the setup request message includes at least one of information indicating whether the first DU supports a carrier aggregation (CA) function between DUs or information indicating whether the first DU supports a dual connectivity (DC) function, and wherein the setup response message includes at least one of information indicating whether the second DU supports the CA function between DUs or information indicating whether the second DU supports the DC function. ### Claim 3 (depends on 2) The method of claim 2, further comprising: transmitting, to the second DU through the communication interface, a modification request message; and receiving, from the second DU, a modification response message, wherein the modification request message includes at least one of identification information related to the first DU, address information related to the first DU, version information of the first DU, cell information for each cell provided by the first DU, information indicating whether the first DU supports the CA function between DUs, or information indicating whether the first DU supports the DC function, and wherein the modification response message includes at least one of identification information related to the second DU, address information related to the second DU, version information of the second DU, cell information for each cell provided by the second DU, information indicating whether the second DU supports the CA function between DUs, or information indicating whether the second DU supports the DC function. ### Claim 4 (depends on 1) The method of claim 1, further comprising: receiving, from a central unit (CU), a user equipment (UE) context modification request message; and transmitting, to the CU, a UE context modification response message, wherein the UE context modification request message includes information on one or more secondary cells (SCells), and wherein, in a case that the one or more SCells include a cell provided by the second DU, the setup request message or the modification request message is generated based on the context modification request message. ### Claim 5 (depends on 2) The method of claim 2, comprising: transmitting, to the second DU through the communication interface, an SCell configuration setup request message; and receiving, from the second DU through the communication interface, an SCell configuration setup response message, wherein the first DU provides a primary cell (PCell) in the CA between DUs, and wherein the second DU provides an SCell in the CA between DUs. ### Claim 6 (depends on 5) The method of claim 5, wherein the SCell configuration setup request message includes information on the PCell and information on one or more candidate SCells, wherein the SCell configuration setup request message includes configuration information of at least one SCell among the one or more candidate SCells, and wherein the configuration information includes at least one of a parameter of at least one radio link control (RLC) layer, a parameter of at least one medium access control (MAC) layer, or a parameter of at least one physical (PHY) layer in the corresponding cell. ### Claim 7 (depends on 2) The method of claim 2, comprising: transmitting, to the second DU through the communication interface, an SCell configuration modification request message; and receiving, from the second DU through the communication interface, an SCell configuration modification response message, wherein the first DU provides a primary cell (PCell) in the CA between DUs, and wherein the second DU provides an SCell in the CA between DUs. ### Claim 8 (depends on 7) The method of claim 7, wherein the SCell configuration modification request message includes at least one of address information, bearer information, band combination and feature set, cell-radio network temporary identity (C-RNTI) information, or DC-related capability information, wherein the SCell configuration modification response message includes address information and modified SCell-specific configuration information, and wherein the configuration information includes at least one of a parameter of at least one RLC layer, a parameter of at least one MAC layer, or a parameter of at least one PHY layer in the corresponding cell. ### Claim 9 (depends on 8) The method of claim 8, wherein the SCell configuration modification response message further includes: information on an SCell for which the SCell configuration modification has failed; and information on a cause of the failure. ### Claim 10 (depends on 2) The method of claim 2, comprising: receiving, from the second DU through the communication interface, an SCell configuration modification request message; and transmitting, to the second DU through the communication interface, an SCell configuration confirmation message, wherein the first DU provides a PCell in the CA between DUs, and wherein the second DU provides an SCell in the CA between DUs. ### Claim 11 (depends on 1) The method of claim 1, further comprising: transmitting, to the second DU through the communication interface, an SCell configuration release request message; and receiving, from the second DU through the communication interface, an SCell configuration release completion message, wherein the SCell configuration release request message includes information on a cause of a release of an SCell configuration for the second DU, wherein the first DU provides a PCell in the CA between DUs, and wherein the second DU provides an SCell in the CA between DUs. ### Claim 12 (depends on 1) The method of claim 1, wherein the setup request message includes dynamic spectrum sharing (DSS) information indicating whether a center frequency and a bandwidth of a long term evolution (LTE) cell in the first DU are identical to a center frequency and a bandwidth of a new radio (NR) cell, respectively, and wherein the setup response message includes DSS information indicating whether a center frequency and a bandwidth of an LTE cell in the second DU are identical to a center frequency and a bandwidth of an NR cell, respectively. ### Claim 13 (depends on 1) The method of claim 1, wherein the setup request message includes cell state information indicating whether each cell provided by the second DU is activated or deactivated, and wherein the setup response message includes cell state information indicating whether each cell provided by the second DU is activated or deactivated. ### Claim 14 An electronic device of a first distributed unit (DU), comprising: at least one processor; and memory storing instructions, wherein the instructions, when executed by the at least one processor, cause the electronic device to: transmit, to a second DU through a communication interface between the first DU and the second DU, a setup request message, and receive, from the second DU, a setup response message, wherein the setup request message includes at least one of identification information related to the first DU or cell information for each cell provided by the first DU, and wherein the setup response message includes at least one of identification information related to the second DU or cell information for each cell provided by the second DU. ### Claim 15 (depends on 14) The electronic device of claim 14, wherein the setup request message includes at least one of information indicating whether the first DU supports a carrier aggregation (CA) function between DUs or information indicating whether the first DU supports a dual connectivity (DC) function, and wherein the setup response message includes at least one of information indicating whether the second DU supports the CA function between DUs or information indicating whether the second DU supports the DC function. ### Claim 16 (depends on 15) The electronic device of claim 15, wherein the instructions, when executed by the one or more processors individually or collectively, further cause the electronic device to: transmit, to the second DU through the communication interface, a modification request message, and receive, from the second DU, a modification response message, wherein the modification request message includes at least one of identification information related to the first DU, address information related to the first DU, version information of the first DU, cell information for each cell provided by the first DU, information indicating whether the first DU supports the CA function between DUs, or information indicating whether the first DU supports the DC function, and wherein the modification response message includes at least one of identification information related to the second DU, address information related to the second DU, version information of the second DU, cell information for each cell provided by the second DU, information indicating whether the second DU supports the CA function between DUs, or information indicating whether the second DU supports the DC function. ### Claim 17 (depends on 14) The electronic device of claim 14, wherein the instructions, when executed by the one or more processors individually or collectively, further cause the electronic device to: receive, from a central unit (CU), a user equipment (UE) context modification request message; and transmit, to the CU, a UE context modification response message, wherein the UE context modification request message includes information on one or more secondary cells (SCells), and wherein, in a case that the one or more SCells include a cell provided by the second DU, the setup request message or the modification request message is generated based on the context modification request message. ### Claim 18 (depends on 14) The electronic device of claim 14, wherein the instructions, when executed by the one or more processors individually or collectively, further cause the electronic device to: transmit, to the second DU through the communication interface, an SCell configuration setup request message; and receive, from the second DU through the communication interface, an SCell configuration setup response message, wherein the first DU provides a primary cell (PCell) in the CA between DUs, and wherein the second DU provides an SCell in the CA between DUs. ### Claim 19 (depends on 14) The electronic device of claim 14, wherein the instructions, when executed by the one or more processors individually or collectively, further cause the electronic device to: transmit, to the second DU through the communication interface, an SCell configuration modification request message, and receive, from the second DU through the communication interface, an SCell configuration modification response message, wherein the first DU provides a primary cell (PCell) in the CA between DUs, wherein the second DU provides an SCell in the CA between DUs, wherein the SCell configuration modification request message includes at least one of address information, bearer information, band combination and feature set, cell-radio network temporary identity (C-RNTI) information, or DC-related capability information, wherein the SCell configuration modification response message includes address information and modified SCell-specific configuration information, and wherein the configuration information includes at least one of a parameter of at least one RLC layer, a parameter of at least one MAC layer, or a parameter of at least one PHY layer in the corresponding cell. ### Claim 20 One or more non-transitory computer-readable storage media storing one or more computer programs including computer-executable instructions that, when executed by one or more processors of an electronic device individually or collectively, cause the electronic device to perform operations, the operations comprising: transmitting, to a second distributed unit (DU), a setup request message through a communication interface between a first DU and the second DU; and receiving, from the second DU, a setup response message, wherein the setup request message includes at least one of identification information related to the first DU or cell information for each cell provided by the first DU, and wherein the setup response message includes at least one of identification information related to the second DU or address information related to the second DU.