# US 12,193,119 B2 · Method and device for managing interface for supporting LTE/NR interworking 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 12,193,119 B2 - Document ID: US12193119B2 - Status: Granted - Kind: B2 - Application number: 18/369,539 - Filed: 2023-09-18 - Published: 2024-01-04 - Granted: 2025-01-07 - Earliest claimed: 2017-01-06 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jian Xu; Daewook Byun; Seokjung Kim - Web page: https://patentgrep.com/patent/US12193119B2 ## CPC - H04W 92/20: between access points - H04W 36/00698: {using different RATs} - H04W 76/11: Allocation or use of connection identifiers - H04W 76/14: Direct-mode setup - H04W 76/15: Setup of multiple wireless link connections - H04W 24/02: Arrangements for optimising operational condition - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 92/02: Inter-networking arrangements - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided is a method for supporting E-UTRAN-NR dual connectivity (EN-DC) indicating dual connectivity between Long-Term Evolution (LTE), that is, Evolved UMTS Terrestrial Radio Access Network (E-UTRAN), and New Radio (NR) Access Technology (NR) in a wireless communication system. A first radio access network (RAN) node transmits an X2 configuration request message, including a first indication indicating that the first RAN node supports EN-DC, to a second RAN node, and receives an X2 configuration response message, including a second indication indicating that the second RAN node supports the EN-DC, from the second RAN node. ## Claims ### Claim 1 A method performed by a wireless device in a wireless communication system, the method comprising: performing uplink and/or downlink transmission with a second radio access network (RAN) node, wherein the second RAN node receives, from a first RAN node, a connection setup request message including a global identifier (ID) of the first RAN node in a connection setup procedure, and wherein the second RAN node transmits, to the first RAN node, a connection setup response message including a global ID of the second RAN node; and performing uplink and/or downlink transmission with the first RAN node, wherein the connection setup procedure is initiated to exchange configuration data needed for the first RAN node and the second RAN node to inter-operate over a certain interface, wherein the first RAN node is a RAN node among either an eNodeB (eNB) or a gNB, wherein the second RAN node is a RAN node different from the first RAN node among either the eNB or the gNB, and wherein the global ID of the first RAN node and the global ID of the second RAN node are determined based on whether the first RAN node and the second RAN node are the eNB or the gNB respectively. ### Claim 2 (depends on 1) The method of claim 1, wherein the first RAN node is the eNB, and wherein the second RAN node is the gNB. ### Claim 3 (depends on 2) The method of claim 2, wherein the global ID of the first RAN node includes a global eNB ID, and wherein the global ID of the second RAN node includes a global gNB ID. ### Claim 4 (depends on 1) The method of claim 1, wherein the first RAN node is the gNB, and wherein the second RAN node is the eNB. ### Claim 5 (depends on 4) The method of claim 4, wherein the global ID of the first RAN node includes a global gNB ID, and wherein the global ID of the second RAN node includes a global eNB ID. ### Claim 6 (depends on 1) The method of claim 1, wherein the connection setup request message is an EN-DC X2 setup request message, and wherein the connection setup response message is an EN-DC X2 setup response message. ### Claim 7 (depends on 1) The method of claim 1, further comprising performing a dual connectivity procedure with the first RAN node and the second RAN node. ### Claim 8 (depends on 1) The method of claim 1, wherein the connection setup procedure is an X2 setup procedure, and wherein the certain interface is an X2 interface. ### Claim 9 (depends on 1) The method of claim 1, wherein the connection setup procedure is an Xn setup procedure, and wherein the certain interface is an Xn interface. ### Claim 10 (depends on 1) The method of claim 1, wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device. ### Claim 11 A wireless device configured to operate in a wireless communication system, the wireless device comprising: a memory; and a processor, operably coupled to the memory, and adapted to: perform uplink and/or downlink transmission with a second radio access network (RAN) node, wherein the second RAN node receives, from a first RAN node, a connection setup request message including a global identifier (ID) of the first RAN node in a connection setup procedure, and wherein the second RAN node transmits, to the first RAN node, a connection setup response message including a global ID of the second RAN node; and perform uplink and/or downlink transmission with the first RAN node, wherein the connection setup procedure is initiated to exchange configuration data needed for the first RAN node and the second RAN node to inter-operate over a certain interface, wherein the first RAN node is a RAN node among either an eNodeB (eNB) or a gNB, wherein the second RAN node is a RAN node different from the first RAN node among either the eNB or the gNB, and wherein the global ID of the first RAN node and the global ID of the second RAN node are determined based on whether the first RAN node and the second RAN node are the eNB or the gNB respectively. ### Claim 12 (depends on 11) The wireless device of claim 11, wherein the first RAN node is the eNB, and wherein the second RAN node is the gNB. ### Claim 13 (depends on 12) The second RAN node of claim 12, wherein the global ID of the first RAN node includes a global eNB ID, and wherein the global ID of the second RAN node includes a global gNB ID. ### Claim 14 (depends on 11) The wireless device of claim 11, wherein the first RAN node is the gNB, and wherein the second RAN node is the eNB. ### Claim 15 (depends on 14) The second RAN node of claim 14, wherein the global ID of the first RAN node includes a global gNB ID, and wherein the global ID of the second RAN node includes a global eNB ID. ### Claim 16 (depends on 11) The wireless device of claim 11, wherein the connection setup request message is an EN-DC X2 setup request message, and wherein the connection setup response message is an EN-DC X2 setup response message. ### Claim 17 (depends on 11) The wireless device of claim 11, wherein the processor is further adapted to, perform a dual connectivity procedure with the first RAN node and the second RAN node. ### Claim 18 (depends on 11) The wireless device of claim 11, wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device. ### Claim 19 A non-transitory tangible computer-readable medium having stored thereon a plurality of instructions, which, when executed by a processor of a wireless device, cause the wireless device to perform operations, wherein the operations comprise: performing uplink and/or downlink transmission with a second radio access network (RAN) node, wherein the second RAN node receives, from a first RAN node, a connection setup request message including a global identifier (ID) of the first RAN node in a connection setup procedure, and wherein the second RAN node transmits, to the first RAN node, a connection setup response message including a global ID of the second RAN node; and performing uplink and/or downlink transmission with the first RAN node, wherein the connection setup procedure is initiated to exchange configuration data needed for the first RAN node and the second RAN node to inter-operate over a certain interface, wherein the first RAN node is a RAN node among either an eNodeB (eNB) or a gNB, wherein the second RAN node is a RAN node different from the first RAN node among either the eNB or the gNB, and wherein the global ID of the first RAN node and the global ID of the second RAN node are determined based on whether the first RAN node and the second RAN node are the eNB or the gNB respectively. ### Claim 20 (depends on 19) The non-transitory tangible computer-readable medium of claim 19, wherein the first RAN node is the eNB, and wherein the second RAN node is the gNB.