Systems and methods for providing emergency callback procedures

• US 9,374,455 B2
• Filed: 11/10/2014
• Issued: 06/21/2016
• Est. Priority Date: 05/28/2009
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Hursey, John
• Primary Examiner(s): Kincaid, Lester
• Assistant Examiner(s): Gu, Andy
• Application Number:
  US14/537,258
• Publication Number:
  US 20150140946A1
• Time in Patent Office: 589 Days
• Field of Search: 455/401.1
• US Class Current: 1/1
• CPC Class Codes: H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
• CPC Class Codes: H04M 3/38 Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections queuing arrangements H04Q3/64
• 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 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/50 for emergency connections
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

Enhanced services, such as call restriction, call forwarding, anonymous call rejection, and proprietary services, may interfere with an emergency callback potentially preventing the callback from reaching the intended destination. Systems and methods for processing emergency calls to eliminate emergency callback failure in response to an emergency call being released are provided herein.

Claims

1. A method comprising:

receiving, by a gateway mobile switching center from a safety answering point, an emergency callback comprising a calling party number set to a number associated with the safety answering point and further comprising a calling party category set to an emergency service call category;

processing, by the gateway mobile switching center, the emergency callback received in response to an unexpected release of an established emergency call between the safety answering point and a mobile device to reestablish communication between the safety answering point and the mobile device;

issuing, by the gateway mobile switching center based at least in part on the emergency service call category of the emergency callback received from the safety answering point, a special use send routing information message to a home location register, the special use send routing information message comprising a call blocking parameter to suppress call blocking features enabled for a calling party of the established emergency call, the call blocking features comprising a call restriction service, a bar all incoming calls service, and an anonymous call rejection service;

processing, by the gateway mobile switching center, a special use send routing information acknowledgement message received by the gateway mobile switching center from the home location register in response to the special use send routing information message comprising the call blocking parameter, the special use send routing information acknowledgement message comprising a mobile station roaming number obtained from a mobile switching center; and

routing, by the gateway mobile switching center, the emergency callback to the mobile device based upon the mobile station roaming number included in the special use send routing information acknowledgement message received from the home location register.

2. The method of claim 1, wherein the emergency callback further comprises a called party number set to a temporary routing number.

3. The method of claim 2, further comprising:

transmitting, by the gateway mobile switching center, a request to an emergency callback platform for a mobile subscriber integrated services digital network number that matches the temporary routing number; and

receiving, by the gateway mobile switching center, a response from the emergency callback platform, the response comprising the mobile subscriber integrated services digital network number and the calling party category set to the emergency service call category.

4. The method of claim 1, wherein the call blocking parameter is configured to suppress the call restriction service.

5. The method of claim 4, wherein the call restriction service comprises a call forwarding service.

6. The method of claim 4, wherein the call restriction service comprises the bar all incoming calls service.

7. The method of claim 4, wherein the call restriction service comprises the anonymous call rejection service.

8. The method of claim 4, wherein the call restriction service comprises an intelligent network service.

9. The method of claim 4, wherein the call restriction service comprises a proprietary service.

10. A gateway mobile switching center comprising:

a processor; and

a memory that stores instructions that, when executed by the processor, cause the processor to perform operations comprising;

receiving, from a safety answering point, an emergency callback comprising a calling party number set to a number associated with the safety answering point and further comprising a calling party category set to an emergency service call category,

processing the emergency callback received from the safety answering point in response to an unexpected release of an emergency call between the safety answering point and a mobile device to reestablish communication between the safety answering point and the mobile device,

issuing, based at least in part on the emergency service call category of the emergency callback received from the safety answering point, a special use sending routing information message to a home location register, the special use sending routing information message comprising a call blocking parameter to suppress call blocking features enabled for an emergency calling party, the call blocking features comprising a call restriction service, a bar all incoming calls service, and an anonymous call rejection service,

processing a special use send routing information acknowledgement message received by the gateway mobile switching center from the home location register in response to the special use send routing information message comprising the call blocking parameter, the special use send routing information acknowledgement message comprising a mobile station roaming number, and

routing the emergency callback to a mobile device based upon the mobile station roaming number included in the special use send routing information acknowledgement message received from the home location register.

11. The gateway mobile switching center of claim 10, wherein the emergency callback further comprises a called party number set to a temporary routing number.

12. The gateway mobile switching center of claim 11, wherein the operations further comprise:

transmitting, to an emergency callback platform, a request for a mobile subscriber integrated services digital network number that matches the temporary routing number; and

receiving, from the emergency callback platform, a response comprising the mobile subscriber integrated services digital network number and the calling party category set to the emergency service call category.

13. The gateway mobile switching center of claim 10, wherein the call blocking parameter is configured to suppress the call restriction service.

14. The gateway mobile switching center of claim 13, wherein the call restriction service comprises a call forwarding service.

15. The gateway mobile switching center of claim 13, wherein the call restriction service comprises the bar all incoming calls service.

16. The gateway mobile switching center of claim 13, wherein the call restriction service comprises the anonymous call rejection service.

17. A non-transitory computer readable medium storing instructions that, when executed by a gateway mobile switching center comprising a processor, cause the processor to perform operations comprising:

receiving, from a safety answering point, an emergency callback comprising a calling party number set to a number associated with the safety answering point and further comprising a calling party category set to an emergency service call category;

processing the emergency callback received from the safety answering point in response to an unexpected release of an emergency call between the safety answering point and a mobile device to reestablish communication between the safety answering point and the mobile device;

issuing, based at least in part on the emergency service call category of the emergency callback received from the safety answering point, a special use sending routing information message to a home location register, the special use sending routing information message comprising a call blocking parameter to suppress call blocking features enabled for an emergency calling party, the call blocking features comprising a call restriction service, a bar all incoming calls service, and an anonymous call rejection service;

processing a special use send routing information acknowledgement message received by the gateway mobile switching center from the home location register in response to the special use send routing information message comprising the call blocking parameter, the special use send routing information acknowledgement message comprising a mobile station roaming number; and

routing the emergency callback to a mobile device based upon the mobile station roaming number included in the special use send routing information acknowledgement message received from the home location register.

18. The non-transitory computer readable medium of claim 17, wherein the emergency callback further comprises a called party number set to a temporary routing number.

19. The non-transitory computer readable medium of claim 18, wherein the operations further comprise:

transmitting, to an emergency callback platform, a request for a mobile subscriber integrated services digital network number that matches the temporary routing number; and

receiving, from the emergency callback platform, a response comprising the mobile subscriber integrated services digital network number and the calling party category set to the emergency service call category.

20. The non-transitory computer readable medium of claim 17, wherein the call blocking parameter is configured to suppress the call restriction service.