Method and apparatus for re-originating emergency calls on failure conditions

• US 7,756,254 B1
• Filed: 12/31/2005
• Issued: 07/13/2010
• Est. Priority Date: 12/31/2005
• Status: Active Grant

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Croak, Marian, Eslambolchi, Hossein
• Primary Examiner(s): PATEL, HEMANT SHANTILAL
• Application Number:
  US11/322,454
• Time in Patent Office: 1,655 Days
• Field of Search: 379/93.25, 379/93.03, 379/37, 379/39, 379/40, 379/42, 379/45, 379/46, 379/50, 379/221.03, 379/221.04, 370351-356, 455/404.1, 455/414.1, 455/445, 709227-229, 709/239
• US Class Current: 379/46
• 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 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

A method and apparatus for enabling a signaling message to be sent in response to an emergency call, e.g., an E911 call, set up message to provide information as to whether or not the E911 call has been successfully completed are disclosed. An indicator of a failed call setup will trigger the call to be re-originated transparently to an emergency center where live operators can handle the call on a 24hours/day basis. In one embodiment, an emergency center is a call center that is operated by a network provider or a third party provider to support emergency calls when a PSAP cannot be reached by a caller for various reasons. The emergency center is capable forwarding a call to the appropriate PSAP for call termination on behalf of the E911 caller.

Claims

1. A method for re-originating an emergency call in a communication network, comprising:

receiving a call setup message associated with an emergency call;

re-originating said emergency call to an emergency center, wherein said emergency center is operated by a network provider of said communication network or a third party emergency answering service provider, if said emergency call failed to be completed to a Public Safety Answering Point (PSAP) by said communication network, wherein said re-originating comprises;

receiving a signaling message indicating that said emergency call to said PSAP has not been completed successfully; and

rerouting said call setup message to said emergency center for call completion; and

forwarding said call setup message to said PSAP via said emergency center to complete said emergency call in response to said receiving said signaling message indicating that said emergency call to said PSAP has not been completed successfully.

2. The method of claim 1, wherein said communication network is a Voice over Internet Protocol (VoIP) network or a Service over Internet Protocol (SoIP) network.

3. The method of claim 1, wherein said emergency call is an Enhanced 911 (E911) call.

4. The method of claim 1, wherein said call setup message to said emergency center is rerouted by a Call Control Element (CCE).

5. The method of claim 1, wherein said PSAP is identified by a Call Control Element (CCE) by communicating with an Enhanced 911 (E911) Application Server (AS).

6. The method of claim 1, wherein said emergency center provides a live operator to answer emergency calls on a 24 hours a day basis.

7. A computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to perform steps of a method for re-originating an emergency call in a communication network, comprising:

receiving a call setup message associated with an emergency call;

re-originating said emergency call to an emergency center, wherein said emergency center is operated by a network provider of said communication network or a third party emergency answering service provider, if said emergency call failed to be completed to a Public Safety Answering Point (PSAP) by said communication network, wherein said re-originating comprises;

receiving a signaling message indicating that said emergency call to said PSAP has not been completed successfully; and

rerouting said call setup message to said emergency center for call completion; and

forwarding said call setup message to said PSAP via said emergency center to complete said emergency call in response to said receiving said signaling message indicating that said emergency call to said PSAP has not been completed successfully.

8. The computer-readable medium of claim 7, wherein said communication network is a Voice over Internet Protocol (VoIP) network or a Service over Internet Protocol (SoIP) network.

9. The computer-readable medium of claim 7, wherein said emergency call is an Enhanced 911 (E911) call.

10. The computer-readable medium of claim 7, wherein said call setup message to said emergency center is rerouted by a Call Control Element (CCE).

11. The computer-readable medium of claim 7, wherein said PSAP is identified by a Call Control Element (CCE) by communicating with an Enhanced 911 (E911) Application Server (AS).

12. The computer-readable medium of claim 7, wherein said emergency center provides a live operator to answer emergency calls on a 24 hours a day basis.

13. An apparatus for re-originating an emergency call in a communication network, comprising:

means for receiving a call setup message associated with an emergency call;

means for re-originating said emergency call to an emergency center, wherein said emergency center is operated by a network provider of said communication network or a third party emergency answering service provider, if said emergency call failed to be completed to a Public Safety Answering Point (PSAP) by said communication network, wherein said re-originating means comprises;

means for receiving a signaling message indicating that said emergency call to said PSAP has not been completed successfully; and

means for rerouting said call setup message to said emergency center for call completion; and

means for forwarding said call setup message to said PSAP via said emergency center to complete said emergency call in response to said receiving said signaling message indicating that said emergency call to said PSAP has not been completed successfully.

14. The apparatus of claim 13, wherein said communication network is a Voice over Internet Protocol (VoIP) network or a Service over Internet Protocol (SoIP) network.

15. The apparatus of claim 13, wherein said emergency call is an Enhanced 911 (E911) call.