# US 2025/0168618 A1 · Plmn roaming for private network subscribers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0168618 A1 - Document ID: US20250168618A1 - Status: Published application - Kind: A1 - Application number: 19/032,653 - Filed: 2025-01-21 - Published: 2025-05-22 - Earliest claimed: 2022-03-15 - Assignees: Verizon Patent and Licensing Inc. - Applicants: Verizon Patent and Licensing Inc. - Inventors: Zoltan Janos Dudar; Subbarao Yallapragada - Web page: https://patentgrep.com/patent/US20250168618A1 ## CPC - H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Systems and methods described herein enable private telecommunications network subscribers that do not have a distinctive Public Land Mobile Network (PLMN) ID to access visited PLMN services. A device in a visited wireless network receives an attach request for a user equipment (UE) device; detects, based on the attach request, that the UE device is subscribed to a private network; provides, to a roaming identity register (RIR), a roaming authorization request for the UE device; receives a roaming authorization response that includes a network pointer to the private network; and applies, based on the roaming authorization response, a roaming policy for the UE device. ## Claims ### Claim 1 A method comprising: receiving, by a network device and from a visited network component in a wireless network, a roaming authorization request for a visiting user equipment (UE) device with a first network serving as a home network for the UE device, wherein the roaming authorization request includes a unique identifier for the UE device; conducting, by the network device and in response to the roaming authorization request, a UE device lookup; and sending, by the network device and to the visited network component, a roaming authorization response, wherein the roaming authorization response includes a network pointer to the first network. ### Claim 2 (depends on 1) The method of claim 1, further comprising: identifying, based on the conducting, the network pointer. ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving, via a provisioning process, the unique identifier for the UE device and the network pointer. ### Claim 4 (depends on 3) The method of claim 3, wherein the provisioning process associates the UE device with a Public Land Mobile Network (PLMN) identifier (ID) that is not globally unique. ### Claim 5 (depends on 1) The method of claim 1, wherein the network pointer includes a network address for a component in the first network. ### Claim 6 (depends on 1) The method of claim 1, wherein the network device is located externally with respect to the wireless network. ### Claim 7 (depends on 1) The method of claim 1, wherein the unique identifier for the UE device includes one of: an International Mobile Subscriber Identity (IMSI), or a Subscription Permanent Identifier (SUPI). ### Claim 8 (depends on 1) The method of claim 1, wherein the visited network component includes a mobility management entity (MME) or an Access and Mobility Management Function (AMF). ### Claim 9 A network device comprising: a processor configured to: receive, from a visited network component in a wireless network, a roaming authorization request for a visiting user equipment (UE) device with a first network serving as a home network for the UE device, wherein the roaming authorization request includes a unique identifier for the UE device; conduct, in response to the roaming authorization request, a UE device lookup; and send, to the visited network component, a roaming authorization response, wherein the roaming authorization response includes a network pointer to the first network. ### Claim 10 (depends on 9) The network device of claim 9, wherein the processor is further configured to: identify, based on the conducting, the network pointer. ### Claim 11 (depends on 9) The network device of claim 9, wherein the processor is further configured to: receive, via a provisioning process, the unique identifier for the UE device and the network pointer. ### Claim 12 (depends on 11) The network device of claim 11, wherein the provisioning process associates the UE device with a Public Land Mobile Network (PLMN) identifier (ID) that is not globally unique. ### Claim 13 (depends on 9) The network device of claim 9, wherein the network pointer includes a network address for a component in the first network. ### Claim 14 (depends on 9) The network device of claim 9, wherein the network pointer includes a network address for one of: Unified Data Management (UDM) in the first network, a Home Subscriber Server (HSS) in the first network, or a combined UDM+HSS in the first network. ### Claim 15 (depends on 9) The network device of claim 9, wherein the network device is located externally with respect to the wireless network. ### Claim 16 (depends on 9) The network device of claim 9, wherein the unique identifier for the UE device includes one of: an International Mobile Subscriber Identity (IMSI), or a Subscription Permanent Identifier (SUPI). ### Claim 17 (depends on 9) The network device of claim 9, wherein the network device is located within the wireless network. ### Claim 18 A non-transitory computer-readable storage medium comprising processor-executable instructions for: receiving, from a network component in a visited wireless network, a roaming authorization request for a visiting user equipment (UE) device with a first network serving as a home network for the UE device, wherein the roaming authorization request includes a unique identifier for the UE device; conducting, in response to the roaming authorization request, a UE device lookup; and sending, to the network component, a roaming authorization response, wherein the roaming authorization response includes a network pointer to the first network. ### Claim 19 (depends on 18) The non-transitory computer-readable storage medium of claim 18, wherein the network component includes a mobility management entity (MME) or an Access and Mobility Management Function (AMF). ### Claim 20 (depends on 18) The non-transitory computer-readable storage medium of claim 18, wherein the processor executable instructions are configured to be executed by a network device including a roaming identity register (RIR) located externally with respect to the visited wireless network.