# US 2026/0089618 A1 · Method and apparatus for implementing service area restriction

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- Number: US 2026/0089618 A1
- Document ID: US20260089618A1
- Status: Published application
- Kind: A1
- Application number: 19/113,404
- Filed: 2022-09-28
- Published: 2026-03-26
- Earliest claimed: 2022-09-28
- Assignees: Beijing Xiaomi Mobile Software Co., Ltd.
- Applicants: Beijing Xiaomi Mobile Software Co., Ltd.
- Inventors: Yuxin MAO; Yang SHEN
- Web page: https://patentgrep.com/patent/US20260089618A1

## CPC

- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04W 48/18: Selecting a network or a communication service
- H04W 48/16: Discovering, processing access restriction or access information
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method for implementing service area restriction, performed by a terminal, includes: in response to receiving service area restriction information sent by a network device, performing a service area restriction rule, in which the service area restriction information includes tracking area identities (TAIs) of a registered public land mobile network (RPLMN) and TAIs of at least one equivalent registered public land mobile network (eRPLMN).

## Claims

### Claim 1

A method for implementing service area restriction, performed by a terminal, comprising:
performing a service area restriction rule in response to receiving service area restriction information sent by a network device;
wherein the service area restriction information comprises tracking area identities (TAIs) of a registered public land mobile network (RPLMN) and TAIs of at least one equivalent registered public land mobile network (eRPLMN).

### Claim 2 (depends on 1)

The method according to claim 1, wherein the service area restriction information comprises a non-allowed area, and performing the service area restriction rule comprises:
in response to the TAIs of the RPLMN being all included in the non-allowed area, determining that the terminal is in the non-allowed area; and
determining that the terminal accesses any of the at least one eRPLMN using a non-allowed area restriction; or
wherein the service area restriction information comprises an allowed area, and performing the service area restriction rule comprises:
in response to none of the TAIs of the RPLMN being included in the allowed area, determining that the terminal is in a non-allowed area; and
determining that the terminal accesses any of the at least one eRPLMN using a non-allowed area restriction.

### Claim 3

(canceled)

### Claim 4 (depends on 2)

The method according to claim 2, wherein determining that the terminal accesses any of the at least one eRPLMN using the non-allowed area restriction comprises:
in a case that the terminal is in the non-allowed area when the terminal uses the RPLMN, determining that the terminal is still in the non-allowed area when the terminal uses any of the at least one eRPLMN.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the service area restriction information comprises a non-allowed area, and performing the service area restriction rule comprises:
in response to at least one of the TAIs of the RPLMN not being included in the non-allowed area, determining that the terminal is in an allowed area; and
determining whether the terminal is in the allowed area according to a predefined rule in response to using any of the at least one eRPLMN; or
wherein the service area restriction information comprises an allowed area, and performing the service area restriction rule comprises:
in response to at least one of the TAIs of the RPLMN being included in the allowed area, determining that the terminal is in the allowed area; and
determining whether the terminal is in the allowed area according to a predefined rule in response to using any of the at least one eRPLMN.

### Claim 6

(canceled)

### Claim 7 (depends on 5)

The method according to claim 5, wherein the predefined rule comprises:
in a case that the terminal uses any of the at least one eRPLMN,
in response to the TAIs of the eRPLMN being all included in the non-allowed area, or in response to none of the TAIs of the eRPLMN being included in the allowed area, determining that the terminal is in the non-allowed area when the terminal uses the eRPLMN;
in response to at least one of the TAIs of the eRPLMN being not included in the non-allowed area, or in response to at least one of the TAIs of the eRPLMN being included in the allowed area, determining that the terminal is in the allowed area when the terminal uses the eRPLMN.

### Claim 8 (depends on 5)

The method according to claim 5, wherein the predefined rule comprises:
in response to using any of the at least one eRPLMN, in a case that the terminal is in the allowed area when the terminal uses the RPLMN, determining that the terminal is still in the allowed area when the terminal uses any of the at least one eRPLMN.

### Claim 9

A method for implementing service area restriction, performed by a network device, comprising:
sending service area restriction information to a terminal; and
performing a service area restriction rule on the terminal according to the service area restriction information, in response to receiving a signaling sent by the terminal,
wherein the service area restriction information comprises tracking area identities (TAIs) of a registered public land mobile network (RPLMN) and TAIs of at least one equivalent registered public land mobile network (eRPLMN).

### Claim 10 (depends on 9)

The method according to claim 9, wherein the service area restriction information comprises a non-allowed area, and performing the service area restriction rule on the terminal comprises:
in response to the TAIs of the RPLMN being all included in the non-allowed area, determining that the terminal is in the non-allowed area; and
determining that the terminal accesses any of the at least one eRPLMN using a non-allowed area restriction; or
wherein the service area restriction information comprises an allowed area, and performing the service area restriction rule on the terminal comprises:
in response to none of the TAIs of the RPLMN being included in the allowed area, determining that the terminal is in a non-allowed area; and
determining that the terminal accesses any of the at least one eRPLMN using a non-allowed area restriction.

### Claim 11

(canceled)

### Claim 12 (depends on 10)

The method according to claim 10, wherein determining that the terminal accesses any of the at least one eRPLMN using the non-allowed area restriction comprises:
in a case that the terminal is in the non-allowed area when the terminal uses the RPLMN, determining that the terminal is still in the non-allowed area when the terminal uses any of the at least one eRPLMN.

### Claim 13 (depends on 9)

The method according to claim 9, wherein the service area restriction information comprises a non-allowed area, and performing the service area restriction rule on the terminal comprises:
in response to at least one of the TAIs of the RPLMN not being included in the non-allowed area, determining that the terminal is in an allowed area; and
determining whether the terminal is in the allowed area according to a predefined rule in response to using any of the at least one eRPLMN; or
wherein the service area restriction information comprises an allowed area, and performing the service area restriction rule on the terminal comprises:
in response to at least one of the TAIs of the RPLMN being included in the allowed area, determining that the terminal is in the allowed area; and
determining whether the terminal is in the allowed area according to a predefined rule in response to using any of the at least one eRPLMN.

### Claim 14

(canceled)

### Claim 15 (depends on 13)

The method according to claim 13, wherein the predefined rule comprises:
in a case that the terminal uses any of the at least one eRPLMN,
in response to the TAIs of the eRPLMN being all included in the non-allowed area, or in response to none of the TAIs of the eRPLMN being included in the allowed area, determining that the terminal is in the non-allowed area when the terminal uses the eRPLMN;
in response to at least one of the TAIs of the eRPLMN being not included in the non-allowed area, or in response to at least one of the TAIs of the eRPLMN being included in the allowed area, determining that the terminal is in the allowed area when the terminal uses the eRPLMN.

### Claim 16 (depends on 13)

The method according to claim 13, wherein the predefined rule comprises:
in response to using any of the at least one eRPLMN, in a case that the terminal is in the allowed area when the terminal uses the RPLMN, determining that the terminal is still in the allowed area when the terminal uses any of the at least one eRPLMN.

### Claim 17 (depends on 9)

The method according to claim 9, wherein performing the service area restriction rule on the terminal comprises:
obtaining current location information of the terminal; and
determining whether the current location information is comprised in the service area restriction information.

### Claim 18 (depends on 17)

The method according to claim 17, further comprising:
in response to determining whether the current location information is included in the service area restriction information, performing at least one of:
in response to the current location information being included in a non-allowed area of the RPLMN, determining that the terminal accesses the RPLMN or any of the at least one eRPLMN using a non-allowed area restriction;
in response to the current location information being included in an allowed area of the RPLMN, determining that the terminal accesses the RPLMN or any of the at least one eRPLMN using an allowed area restriction; or
in response to the current location information being included in the allowed area of the RPLMN and in the non-allowed area of any of the at least one eRPLMN, determining that a corresponding allowed area restriction is used when the terminal accesses the RPLMN, and a corresponding non-allowed area restriction is used when the terminal accesses the eRPLMN.

### Claim at position 19

-20. (canceled)

### Claim 21

A terminal, comprising:
a processor; and
a memory storing a computer program executable by the processor,
wherein the processor is configured to:
perform a service area restriction rule in response to receiving service area restriction information sent by a network device;
wherein the service area restriction information comprises tracking area identities (TAIs) of a registered public land mobile network (RPLMN) and TAIs of at least one equivalent registered public land mobile network (eRPLMN).

### Claim 22 (depends on 9)

A network device, comprising:
a processor; and
a memory storing a computer program executable by the processor, wherein the processor is configured to perform the method according to claim 9.

### Claim at position 22

-25. (canceled)

### Claim 26 (depends on 21)

The terminal according to claim 21, wherein the service area restriction information comprises a non-allowed area, and the processor is further configured to:
in response to the TAIs of the RPLMN being all included in the non-allowed area, determine that the terminal is in the non-allowed area; and
determine that the terminal accesses any of the at least one eRPLMN using a non-allowed area restriction; or
wherein the service area restriction information comprises an allowed area, and the processor is further configured to:
in response to none of the TAIs of the RPLMN being included in the allowed area, determine that the terminal is in a non-allowed area; and
determine that the terminal accesses any of the at least one eRPLMN using a non-allowed area restriction.

### Claim 27 (depends on 26)

The terminal according to claim 26, wherein the processor is further configured to:
in a case that the terminal is in the non-allowed area when the terminal uses the RPLMN, determine that the terminal is still in the non-allowed area when the terminal uses any of the at least one eRPLMN.

### Claim 28 (depends on 21)

The terminal according to claim 21, wherein the service area restriction information comprises a non-allowed area, and the processor is further configured to:
in response to at least one of the TAIs of the RPLMN not being included in the non-allowed area, determine that the terminal is in an allowed area; and
determine whether the terminal is in the allowed area according to a predefined rule in response to using any of the at least one eRPLMN; or
wherein the service area restriction information comprises an allowed area, and the processor is further configured to:
in response to at least one of the TAIs of the RPLMN being included in the allowed area, determine that the terminal is in the allowed area; and
determine whether the terminal is in the allowed area according to a predefined rule in response to using any of the at least one eRPLMN.

### Claim 29 (depends on 28)

The terminal according to claim 28, wherein the predefined rule comprises:
in a case that the terminal uses any of the at least one eRPLMN,
in response to the TAIs of the eRPLMN being all included in the non-allowed area, or in response to none of the TAIs of the eRPLMN being included in the allowed area, determining that the terminal is in the non-allowed area when the terminal uses the eRPLMN;
in response to at least one of the TAIs of the eRPLMN being not included in the non-allowed area, or in response to at least one of the TAIs of the eRPLMN being included in the allowed area, determining that the terminal is in the allowed area when the terminal uses the eRPLMN; or
in response to using any of the at least one eRPLMN, in a case that the terminal is in the allowed area when the terminal uses the RPLMN, determining that the terminal is still in the allowed area when the terminal uses any of the at least one eRPLMN.