# US 12,764,517 B2 · Method and device for transmitting data of roaming terminal in wireless communication system

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- Number: US 12,764,517 B2
- Document ID: US12764517B2
- Status: Granted
- Kind: B2
- Application number: 18/292,533
- Filed: 2022-08-05
- Published: 2024-08-01
- Granted: 2026-10-13
- Earliest claimed: 2021-08-05
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Kisuk Kweon
- Web page: https://patentgrep.com/patent/US12764517B2

## CPC

- H04W 8/20: Transfer of user or subscriber data
- 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

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate and, more specifically, to a method for controlling transmission of non-Internet protocol (non-IP) address data of a roaming terminal in unified data management (UDM) of a wireless communication system.

## Claims

### Claim 1

A method for a unified data management (UDM) of a wireless communication system to control transmission of a non-Internet protocol (non-IP) address data of a roaming terminal, the method comprising:
receiving, from an access and mobility management function (AMF) that has registered the roaming terminal in a visited public land mobile network (VPLMN), a subscriber information request message of the roaming terminal;
providing, to the AMF, subscriber information of the roaming terminal;
receiving, from a network exposure function (NEF) located in a home public land mobile network (HPLMN), a non-IP data delivery (NIDD) authorization request message including configuration information indicating whether NIDD of the roaming terminal passes through the NEF; and
updating terminal subscriber information of the roaming terminal based on the received NIDD authorization request message,
wherein the terminal subscriber information comprises a session management subscription data and a session management function (SMF) selection subscription data.

### Claim 2 (depends on 1)

The method of claim 1, further comprising transmitting an update indication message for updating the subscriber information based on the terminal subscriber information from the VPLMN to the AMF that has registered the roaming terminal.

### Claim 3 (depends on 2)

The method of claim 2, wherein the update indication message is configured to indicate addition or deletion of an invoke NEF indication field included in the SMF selection subscription data.

### Claim 4 (depends on 3)

The method of claim 3, wherein the invoke NEF indication field is configured to indicate that the non-IP address data is transmitted through an SMF.

### Claim 5 (depends on 1)

The method of claim 1, further comprising transmitting an update indication message for updating the subscriber information to an SMF of the HPLMN based on the terminal subscriber information.

### Claim 6 (depends on 5)

The method of claim 5, wherein the update indication message is configured to indicate addition or deletion of an NEF identity for an NIDD field included in the session management subscription data.

### Claim 7 (depends on 6)

The method of claim 6, wherein the NEF identity for the NIDD field is configured to indicate that the non-IP address data is transmitted through an SMF.

### Claim 8 (depends on 1)

The method of claim 1, further comprising:
providing, when the subscriber information of the roaming terminal is requested from an SMF of the HPLMN, the terminal subscriber information of the roaming terminal; and
transmitting, when an NIDD update indication message is received from the SMF of the HPLMN, an update indication message for updating subscriber information based on the terminal subscriber information to the AMF of the VPLMN.

### Claim 9 (depends on 8)

The method of claim 8, wherein the NIDD update indication message comprises information of the AMF and information of the roaming terminal.

### Claim 10 (depends on 8)

The method of claim 8, wherein the update indication message is configured to indicate addition or deletion of an invoke NEF indication field included in the SMF selection subscription data.

### Claim 11 (depends on 1)

The UDM device of claim 1, wherein the at least one processor is further configured to:
provide, when the subscriber information of the roaming terminal is requested from an SMF of the HPLMN, the terminal subscriber information of the roaming terminal; and
transmit, when an NIDD update indication message is received from the SMF of the HPLMN, an update indication message for updating subscriber information based on the terminal subscriber information to the AMF of the VPLMN.

### Claim 12 (depends on 11)

The UDM device of claim 11, wherein the NIDD update indication message comprises information of the AMF and information of the roaming terminal.

### Claim 13 (depends on 11)

The UDM device of claim 11, wherein the update indication message is configured to indicate addition or deletion of an invoke NEF indication field included in the SMF selection subscription data.

### Claim 14

A unified data management (UDM) device for controlling transmission of non-Internet protocol (non-IP) address data of a roaming terminal in a wireless communication system, the UDM device comprising:
a network interface configured to communicate with other network functional devices;
a memory configured to store terminal information; and
at least one processor,
wherein the at least one processor is configured to:
receive, from an access and mobility management function (AMF) that has registered the roaming terminal in a visited public land mobile network (VPLMN), a subscriber information request message of the roaming terminal,
provide subscriber information of the roaming terminal to the AMF,
receive, from a network exposure function (NEF) located in a home public land mobile network (HPLMN), a non-IP data delivery (NIDD) authorization request message including configuration information indicating whether NIDD of the roaming terminal passes through the NEF, and
update terminal subscriber information of the roaming terminal based on the received NIDD authorization request message,
wherein the terminal subscriber information comprises a session management subscription data and a session management function (SMF) selection subscription data.

### Claim 15 (depends on 14)

The UDM device of claim 14, wherein the at least one processor is configured to further control to transmit an update indication message for updating the subscriber information based on the terminal subscriber information from the VPLMN to the AMF that has registered the roaming terminal.

### Claim 16 (depends on 15)

The UDM device of claim 15, wherein the update indication message is configured to indicate addition or deletion of an invoke NEF indication field included in SMF selection subscription data.

### Claim 17 (depends on 16)

The UDM device of claim 16, wherein the invoke NEF indication field is configured to indicate that the non-IP address data is transmitted through an SMF.

### Claim 18 (depends on 14)

The UDM device of claim 14, wherein the at least one processor is configured to further control to transmit an update indication message for updating the subscriber information to an SMF of the HPLMN, based on the terminal subscriber information.

### Claim 19 (depends on 18)

The UDM device of claim 18, wherein the update indication message is configured to indicate addition or deletion of an NEF identity for an NIDD field included in the session management subscription data.

### Claim 20 (depends on 19)

The UDM device of claim 19, wherein the NEF identity for the NIDD field is configured to indicate that the non-IP address data is transmitted through an SMF.