# US 12,764,638 B2 · Method and apparatus for handling forbidden tracking area identity belongs to different public land mobile network-identifier in communication system

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- Number: US 12,764,638 B2
- Document ID: US12764638B2
- Status: Granted
- Kind: B2
- Application number: 18/578,284
- Filed: 2023-11-01
- Published: 2024-11-14
- Granted: 2026-10-13
- Earliest claimed: 2022-11-02
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Danish Ehsan Hashmi; Jagadeesh Gandikota; Koustav Roy; Lalith Kumar; Utsav Sinha
- Web page: https://patentgrep.com/patent/US12764638B2

## CPC

- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 60/06: De-registration or detaching
- H04W 84/042: {Public Land Mobile systems, e.g. cellular systems}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate.

## Claims

### Claim 1

A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from an access and mobility management function (AMF), a message comprising information on forbidden tracking areas; identifying whether at least one tracking area identity (TAI) in the information belongs to a serving public land mobile network (PLMN) or an equivalent PLMN;
in case that the at least one TAI in the information belongs to the serving PLMN or the equivalent PLMN, storing the at least one TAI; and
in case that the at least one TAI in the information does not belong to the serving PLMN or the equivalent PLMN, ignoring the at least one TAI.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the information is at least one of information on forbidden tracking areas for roaming or information on forbidden tracking areas for regional provision of service.

### Claim 3 (depends on 1)

The method of claim 1,
wherein the message is one of a message for registration acceptance, a message for registration rejection, a message for service acceptance, a message for service rejection, or a message for deregistration request.

### Claim 4 (depends on 1)

The method of claim 1, wherein the storing comprises
storing the at least one TAI into a list of the forbidden tracking areas.

### Claim 5 (depends on 1)

The method of claim 1, wherein the storing comprises storing at least one of information on a closed access group (CAG), information on a cell ID, or information on a geographical location associated with the serving PLMN or the equivalent PLMN.

### Claim 6

A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive, from an access and mobility management function (AMF), a message comprising information on forbidden tracking areas,
identify whether at least one tracking area identity (TAI) in the information belongs to a serving public land mobile network (PLMN) or an equivalent PLMN,
in case that the at least one TAI in the information belongs to the serving PLMN or the equivalent PLMN, store the at least one TAI, and in case that the at least one TAI in the information does not belong to the serving PLMN or the equivalent PLMN, ignore the at least one TAI.

### Claim 7 (depends on 6)

The terminal of claim 6,
wherein the information is at least one of information on forbidden tracking areas for roaming or information on forbidden tracking areas for regional provision of service.

### Claim 8 (depends on 6)

The terminal of claim 6,
wherein the message is one of a message for registration acceptance, a message for registration rejection, a message for service acceptance, a message for service rejection, or a message for deregistration request.

### Claim 9 (depends on 6)

The terminal of claim 6, wherein the at least one processor is further configured to:
store the at least one TAI into a list of the forbidden tracking areas.

### Claim 10 (depends on 6)

The terminal of claim 6, wherein the at least one processor is further configured to:
store at least one of information on a closed access group (CAG), information on a cell ID, or information on a geographical location associated with the serving PLMN or the equivalent PLMN.