# US 12,604,247 B2 · Method, apparatus and computer program for indicating that a source access node connected to the first public land mobile network and a target access node connected to the second public land mobile network area same access node > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,247 B2 - Document ID: US12604247B2 - Status: Granted - Kind: B2 - Application number: 18/166,908 - Filed: 2023-02-09 - Published: 2023-08-24 - Granted: 2026-04-14 - Earliest claimed: 2022-02-12 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Rajesh Babu Natarajan; Subramanya Chandrashekar; Srinivasan Selvaganapathy; Saurabh Khare - Web page: https://patentgrep.com/patent/US12604247B2 ## CPC - H04W 36/08: Reselecting an access point - H04W 36/12: Reselecting a serving backbone network switching or routing node - H04W 36/0033: {with transfer of context information} - H04W 36/32: by location or mobility data, e.g. speed data - H04W 48/18: Selecting a network or a communication service - H04W 60/00: Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration - H04W 48/04: based on user or terminal location or mobility data, e.g. moving direction, speed - H04W 60/001: {Registration rejection or failure} - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract There is provided an apparatus comprising determining, by a first access and mobility management function in a first network, that handover of a user equipment from the first access and mobility management function to a second access and mobility management function in a second network is required; sending, to the second access and mobility management function, a context update request for the user equipment, wherein the context update request comprises an indication that the source and target access node are the same; and receiving, from the second access and mobility management function, a context update response based on the context update request, the context update response comprising the indication that the source and target access node are the same. ## Claims ### Claim 1 A method comprising: determining, by a first access and mobility management function of a first public land mobile network serving a user equipment, that the user equipment is in a location or area associated with a second public land mobile network; determining, by the first access and mobility management function, that handover of the user equipment from the first access and mobility management function to a second access and mobility management function of the second public land mobile network is required; sending, by the first access and mobility management function to the second access and mobility management function, a request to update a user equipment context for the user equipment, wherein the request comprises an indication that a source access node connected to the first public land mobile network and a target access node connected to the second public land mobile network are a same access node; and receiving, by the first access and mobility management function from the second access and mobility management function, a response to the request, the response comprising the indication that the source access node and the target access node are the same access node, wherein the first access and mobility management function is stored in memory of an apparatus of the first public land mobile network; and wherein the second access and mobility management function is stored in memory of an apparatus of the second public land mobile network. ### Claim 2 (depends on 1) The method of claim 1, further comprising: obtaining, by the first access and mobility management function, from a network repository function, address information comprising an address of the second access and mobility management function, and wherein the sending comprises sending the request to update the user equipment context to the address of the second access and mobility management function. ### Claim 3 (depends on 1) The method of claim 1, wherein the request to update the user equipment context for the user equipment comprises one or more of the following: an identifier of the source access node; user equipment context information for the user equipment; protocol data unit session (PDU) information indicating one or more PDU sessions of the user equipment; single network slice assistance information indicating a network slice of the first public land mobile network; or a handle of the source access node for the user equipment. ### Claim 4 An apparatus comprising: at least one processor; and at least one memory storing instructions of a first access and mobility management function of a first public land mobile network, wherein the instructions, when executed by the at least one processor, cause the apparatus to perform operations, the operations comprising: determining that a user equipment served by the first access and mobility function is in a location or area associated with a second public land mobile network; determining that handover of the user equipment from the first access and mobility management function to a second access and mobility management function of the second public land mobile network is required; sending a request to update a user equipment context for the user equipment, wherein the request comprises an indication that a source access node connected to the first public land mobile network and a target access node connected to the second public land mobile network are a same access node; and receiving a response to the request, the response comprising the indication that the source access node and the target access node are the same access node. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the operations further comprise: obtaining from a network repository function, address information comprising an address of the second access and mobility management function, and wherein the sending comprises sending the request to update the user equipment context to the address of the second access and mobility management function. ### Claim 6 (depends on 4) The apparatus of claim 4, wherein the request to update the user equipment context for the user equipment comprises one or more of the following: an identifier of the source access node; user equipment context information for the user equipment; protocol data unit session (PDU) information indicating one or more PDU sessions of the user equipment; single network slice assistance information indicating a network slice of the first public land mobile network; or a handle of the source access node for the user equipment. ### Claim 7 A method comprising: determining, by a first public land mobile network serving a user equipment, that the user equipment is in a location or area associated with a second public land mobile network; determining, by the first public land mobile network, that handover of the user equipment from a first access and mobility management function to a second access and mobility management function of the second public land mobile network is required; sending, by the first public land mobile network to the second public land mobile network, a request to update a user equipment context for the user equipment, wherein the request comprises an indication that a source access node connected to the first public land mobile network and a target access node connected to the second public land mobile network are a same access node; and receiving, by the first public land mobile network from the second public land mobile network, a response to the request, the response comprising the indication that the source access node and the target access node are the same access node. ### Claim 8 (depends on 7) The method of claim 7, further comprising: obtaining, by the first access and mobility management function, from a network repository function, address information comprising an address of the second access and mobility management function, and wherein the sending comprises sending the request to update the user equipment context to the address of the second access and mobility management function. ### Claim 9 (depends on 7) The method of claim 7, wherein the request to update the user equipment context for the user equipment comprises one or more of the following: an identifier of the source access node; user equipment context information for the user equipment; protocol data unit session (PDU) information indicating one or more PDU sessions of the user equipment; single network slice assistance information indicating a network slice of the first public land mobile network; or a handle of the source access node for the user equipment.