# US 12,193,108 B2 · Methods, systems, and computer readable media for identifying roaming messages

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- Number: US 12,193,108 B2
- Document ID: US12193108B2
- Status: Granted
- Kind: B2
- Application number: 17/725,499
- Filed: 2022-04-20
- Published: 2023-10-26
- Granted: 2025-01-07
- Earliest claimed: 2022-04-20
- Assignees: Oracle International Corporation
- Applicants: Oracle International Corporation
- Inventors: Kawal Sapra; Amarnath Jayaramachar
- Web page: https://patentgrep.com/patent/US12193108B2

## 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 8/12: between location registers or mobility servers
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Methods, systems, and computer readable media for identifying roaming messages at network functions in a home public land mobile network (PLMN). A method includes receiving, at a home security edge protection proxy (SEPP) for the home PLMN, a request message from a consumer network function in a visitor PLMN and adding, at the home SEPP, a header to the request message indicating that the request message originated in the visitor PLMN. The method includes receiving, at a producer network function in the home PLMN, the request message and determining, at the producer network function, that the request message originated in the visitor PLMN by finding the header indicating that the request message originated in the visitor PLMN. The method includes applying, at the producer network function, a roaming-specific policy while processing the request message in response to determining that the request message originated in the visitor PLMN.

## Claims

### Claim 1

A method for identifying roaming messages at network functions in a home public land mobile network (PLMN), the method comprising:
receiving, at a home security edge protection proxy (SEPP) for the home PLMN, a request message from a consumer network function in a visitor PLMN;
adding, at the home SEPP, a header to the request message indicating that the request message originated in the visitor PLMN;
receiving, at a producer network function in the home PLMN, the request message;
determining, at the producer network function in the home PLMN, that the request message originated in the visitor PLMN by finding the header indicating that the request message originated in the visitor PLMN; and
applying, at the producer network function in the home PLMN, a roaming-specific policy while processing the request message in response to determining that the request message originated in the visitor PLMN.

### Claim 2 (depends on 1)

The method of claim 1, wherein receiving the request message from the consumer network function in the visitor PLMN comprises receiving the request message by way of a visitor SEPP for the visitor PLMN.

### Claim 3 (depends on 1)

The method of claim 1, wherein applying a roaming-specific policy while processing the request message comprises applying a roaming-specific security policy.

### Claim 4 (depends on 1)

The method of claim 1, wherein applying a roaming-specific policy while processing the request message comprises applying a roaming-specific observability policy.

### Claim 5 (depends on 1)

The method of claim 1, comprising sending, at the producer network function in the home PLMN, a response message to the consumer network function in the visitor PLMN by way of the home SEPP.

### Claim 6 (depends on 1)

The method of claim 1, wherein the producer network function comprises a network function repository function (NRF), and wherein the request message comprises a NRF NFStatusSubscribe message or a NRF NFStatusUnsubscribe message.

### Claim 7 (depends on 1)

The method of claim 1, wherein the producer network function comprises a network function repository function (NRF), and wherein the request message comprises a NRF NF Discover message.

### Claim 8

A system for identifying roaming messages at network functions in a home public land mobile network (PLMN), the system comprising:
a home security edge protection proxy (SEPP) for the home PLMN, wherein the home SEPP is configured for:
receiving a request message from a consumer network function in a visitor PLMN; and
adding a header to the request message indicating that the request message originated in the visitor PLMN;
a producer network function in the home PLMN, wherein the producer network function is configured for:
receiving the request message;
determining that the request message originated in the visitor PLMN by finding the header indicating that the request message originated in the visitor PLMN; and
applying a roaming-specific policy while processing the request message in response to determining that the request message originated in the visitor PLMN.

### Claim 9 (depends on 8)

The system of claim 8, wherein receiving the request message from the consumer network function in the visitor PLMN comprises receiving the request message by way of a visitor SEPP for the visitor PLMN.

### Claim 10 (depends on 8)

The system of claim 8, wherein applying a roaming-specific policy while processing the request message comprises applying a roaming-specific security policy.

### Claim 11 (depends on 8)

The system of claim 8, wherein applying a roaming-specific policy while processing the request message comprises applying a roaming-specific observability policy.

### Claim 12 (depends on 8)

The system of claim 8, wherein the producer network function in the home PLMN is configured for sending a response message to the consumer network function in the visitor PLMN by way of the home SEPP.

### Claim 13 (depends on 8)

The system of claim 8, wherein the producer network function comprises a network function repository function (NRF), and wherein the request message comprises a NRF NFStatusSubscribe message or a NRF NFStatusUnsubscribe message.

### Claim 14 (depends on 8)

The system of claim 8, wherein the producer network function comprises a network function repository function (NRF), and wherein the request message comprises a NRF NF Discover message.

### Claim 15

One or more non-transitory computer readable media having stored thereon executable instructions that when executed by at least one processor of a computer cause the computer to perform steps comprising:
receiving, at a home security edge protection proxy (SEPP) for a home public land mobile network (PLMN), a request message from a consumer network function in a visitor PLMN;
adding, at the home SEPP, a header to the request message indicating that the request message originated in the visitor PLMN;
receiving, at a producer network function in the home PLMN, the request message;
determining, at the producer network function in the home PLMN, that the request message originated in the visitor PLMN by finding the header indicating that the request message originated in the visitor PLMN; and
applying, at the producer network function in the home PLMN, a roaming-specific policy while processing the request message in response to determining that the request message originated in the visitor PLMN.

### Claim 16 (depends on 15)

The non-transitory computer readable media of claim 15, wherein receiving the request message from the consumer network function in the visitor PLMN comprises receiving the request message by way of a visitor SEPP for the visitor PLMN.

### Claim 17 (depends on 15)

The non-transitory computer readable media of claim 15, wherein applying a roaming-specific policy while processing the request message comprises applying a roaming-specific security policy.

### Claim 18 (depends on 15)

The non-transitory computer readable media of claim 15, wherein applying a roaming-specific policy while processing the request message comprises applying a roaming-specific observability policy.

### Claim 19 (depends on 15)

The non-transitory computer readable media of claim 15, wherein the producer network function comprises a network function repository function (NRF), and wherein the request message comprises a NRF NFStatusSubscribe message or a NRF NFStatusUnsubscribe message.

### Claim 20 (depends on 15)

The non-transitory computer readable media of claim 15, wherein the producer network function comprises a network function repository function (NRF), and wherein the request message comprises a NRF NF Discover message.