E-911 Redirection System and Method

• US 20170353892A1
• Filed: 06/01/2016
• Published: 12/07/2017
• Est. Priority Date: 06/01/2016
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.), Interwise Ltd. (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.), Interwise Ltd. (AT&T, Inc.)
• Inventors: Elia, Barry J., Kapeluto, Zahi
• Granted Patent: US 10,225,766 B2
• Time in Patent Office: Days
• CPC Class Codes: H04M 1/2535 adapted for voice communication over an Internet Protocol [IP] network Voice over Internet Protocol (VoIP) network equipment and services H04M7/006; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04M 1/72418 for supporting emergency services
• CPC Class Codes: H04W 36/0022 for transferring data sessions between adjacent core network technologies
• CPC Class Codes: H04W 36/00224 between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
• CPC Class Codes: H04W 4/025 using location based information parameters
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

A method includes receiving a request to initiate an emergency call, directing, the mobile device to initiate the emergency call using a cellular network, receiving a network not available indication that the emergency call cannot be completed using the cellular network, selecting location information of the mobile device and requesting the emergency call be initiated by a VoIP client on the mobile device using the location information obtained from the selecting step.

Claims

1. A method comprising:

Receiving, by an application running on a mobile device, a request to initiate an emergency call;

Directing, by the application, the mobile device to initiate the emergency call using a cellular network;

Receiving, by the application, a network not available indication that the emergency call cannot be completed using the cellular network;

Selecting, by the application, location information of the mobile device; and

Requesting, by the application, the emergency call be initiated by a VoIP client on the mobile device using the location information obtained from the selecting step.

2. The method of claim 1 wherein the requesting step is performed by the application receiving a retry command entered from the mobile device.

3. The method of claim 1 wherein the selecting step is based on the most accurate location information available when the emergency call is being placed.

4. The method of claim 3 wherein the most accurate location information available is based on GPS or assisted GPS functionality in the mobile device.

5. The method of claim 3 wherein the most accurate location information available is determined by the cellular network.

6. The method of claim 3 wherein the most accurate location information available is based on location determined by a VoIP client operating on the mobile device.

7. The method of claim 3 wherein the location of the mobile device is first determined by the cellular network and then relayed to a public service access point using the VoIP network.

8. A mobile device comprising:

a processor; and

a memory coupled with the processor, the memory having stored thereon executable instructions that when executed by the processor cause the processor to effectuate operations comprising;

Receiving a request to initiate an emergency call;

Directing the mobile device to initiate the emergency call using a cellular network;

Receiving a network not available indication that the emergency call cannot be completed using the cellular network;

Selecting location information of the mobile device; and

Requesting the emergency call be initiated by a VoIP client on the mobile device using the location information obtained from the selecting step.

9. The mobile device of claim 8 wherein the requesting step is performed by receiving a retry command entered from the mobile device.

10. The mobile device of claim 8 wherein the selecting step is based on the most accurate location information available when the emergency call is being placed.

11. The mobile device of claim 10 wherein the most accurate location information available is based on GPS or assisted GPS functionality in the mobile device.

12. The method of claim 10 wherein the most accurate location information available is determined by the cellular network.

13. The method of claim 10 wherein the most accurate location information available is based on location determined by a VoIP client operating on the mobile device.