# US 11,445,350 B2 · Method and apparatus for providing emergency codes to a mobile device

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- Number: US 11,445,350 B2
- Document ID: US11445350B2
- Status: Granted
- Kind: B2
- Application number: 17/013,304
- Filed: 2020-09-04
- Published: 2021-02-25
- Granted: 2022-09-13
- Earliest claimed: 2017-04-03
- Assignees: BlackBerry Limited
- Applicants: BlackBerry Limited
- Inventors: Adrian Buckley; Jan Hendrick Lucas Bakker
- Web page: https://patentgrep.com/patent/US11445350B2

## CPC

- H04W 4/90: Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
- H04W 4/50: Service provisioning or reconfiguring
- H04W 12/0431: Key distribution or pre-distribution; Key agreement
- H04W 12/06: Authentication
- H04W 48/14: using user query {or user detection}
- 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 at a user equipment for obtaining emergency codes using a non-Third Generation Partnership Project (3GPP) network, the method including sending a request message to a network node, the request message containing an indication; and receiving, at the user equipment, a response message, the response message including at least one mobile country code (MCC), and the response message indicating an emergency number, type or category information, wherein the emergency number, type or category information is associated with the at least one MCC, and wherein the at least one MCC indicates a portion of a Public Land Mobile Network (PLMN) code to which the emergency number, type or category information applies.

## Claims

### Claim 1

A method using Internet Key Exchange Protocol version 2 (IKEv2) procedures at an evolved packet data gateway (ePDG) for providing emergency numbers, the method comprising:
receiving an IKEv2 request message comprising a request for emergency number information from a user equipment (UE); and
transmitting to the user equipment an IKEv2 response message, the IKEv2 response message including an indicator of an empty list of emergency numbers and a mobile country code (MCC), and wherein the IKEv2 response message causes the UE to overwrite a previously received list of local emergency numbers.

### Claim 2 (depends on 1)

The method of claim 1, wherein the IKEv2 request message is an IKE_AUTH request.

### Claim 3 (depends on 1)

The method of claim 1, wherein the IKEv2 request message comprises a CFG_REQUEST configuration payload.

### Claim 4 (depends on 1)

The method of claim 1, wherein the IKEv2 response message is an IKE_AUTH response.

### Claim 5 (depends on 1)

The method of claim 1, wherein the IKEv2 response message comprises a CFG_REPLY configuration payload.

### Claim 6

An evolved packet data gateway (ePDG) comprising
a processor;
a communication subsystem supporting the Internet Key Exchange Protocol version 2 (IKEv2) for providing emergency numbers, wherein the ePDG is configured to:
receive a request message comprising a request for emergency number information from a user equipment (UE); and
transmit to the user equipment, a response message, the response message including an indicator of an empty list of emergency numbers and a mobile country code (MCC), wherein the response message causes the UE to overwrite a previously received list of local emergency numbers.

### Claim 7 (depends on 6)

The ePDG of claim 6, wherein the IKEv2 request message is an IKE_AUTH request.

### Claim 8 (depends on 6)

The ePDG of claim 6, wherein the IKEv2 request message comprises a CFG_REQUEST configuration payload.

### Claim 9 (depends on 6)

The ePDG of claim 6, wherein the IKEv2 response message is an IKE_AUTH response.

### Claim 10 (depends on 6)

The ePDG of claim 6, wherein the IKEv2 response message comprises a CFG_REPLY configuration payload.

### Claim 11

A non-transitory computer-readable medium containing instructions which, when executed, cause an evolved packet data gateway (ePDG) to perform operations comprising:
receiving a request message comprising a request for emergency number information from a user equipment (UE); and
transmitting to the user equipment, a response message, the response message including an indicator of an empty list of emergency numbers and a mobile country code (MCC), wherein the response message causes the UE to overwrite a previously received list of local emergency numbers.

### Claim 12 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the IKEv2 request message is an IKE_AUTH request.

### Claim 13 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the IKEv2 request message comprises a CFG_REQUEST configuration payload.

### Claim 14 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the IKEv2 response message is an IKE_AUTH response.

### Claim 15 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the IKEv2 response message comprises a CFG_REPLY configuration payload.