Device based emergency services for cross cluster extension mobility

• US 8,311,036 B2
• Filed: 12/12/2008
• Issued: 11/13/2012
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Keller, Daniel Scott, Trasi, Atul
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): Gay, Sonia
• Application Number:
  US12/333,858
• Publication Number:
  US 20100150135A1
• Time in Patent Office: 1,432 Days
• Field of Search: 379/207.14, 379/221.01, 379/221.14, 379/221.15, 379/37, 379/45, 370/352
• US Class Current: 370/352
• CPC Class Codes: H04M 2242/04 for emergency applications
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

A system is disclosed. The system has a call data receiver arranged to receive call data comprising number data indicative of a telephone number associated with a call connection request. The system also has a translator arranged to translate the received number data to obtain translated number data indicative of another telephone number. There is also a number data associator for associating the call connection request with the translated number data.

Claims

1. A method comprising:

receiving call data at a computer, the call data comprising number data indicative of a first telephone number associated with a call connection request that originated from an internet protocol (IP) device over a voice over internet protocol (VoIP) network, the call data further comprising location data indicative of a geographical location of the IP device from which the call connection request originated instead of a geographical location that is assigned to a user of the IP device, where the first telephone number is indicative of a first emergency telephone number associated with the geographical location assigned to the user of the IP device;

translating, with the computer, the number data into translated number data indicative of a second telephone number based on the location data indicative of the geographical location of the IP device from which the call connection request originated instead of the geographical location that is assigned to the user of the IP device, where the second telephone number is indicative of a second emergency telephone number associated with the geographical location of the IP device; and

forwarding the call connection request with the computer to the second telephone number.

2. The method of claim 1 wherein translating the number data comprises applying a translation pattern to the number data.

3. The method of claim 2 wherein the translation pattern is selected from a plurality of translation patterns in accordance with the location data indicative of the geographical location of the IP device from which the call connection request originated instead of the geographical location that is assigned to the user of the IP device.

4. The method of claim 2 wherein the number data comprises a string of alphanumeric digits and applying the translation pattern comprises concatenating a site code and the string, the site code being indicative of the geographical location of the IP device.

5. The method of claim 2 wherein the number data comprises a string of alphanumeric digits, and applying the translation pattern comprises concatenating an Inter Cluster Trunk (ICT) code and the string, the ICT code being indicative of a geographical area in which the geographical location of the IP device from which the call connection request originated is located.

6. The method of claim 1 wherein translation of the number data is performed by a Calling Search Space.

18. The method of claim 1, wherein forwarding the call connection request with the computer to the second telephone number comprises forwarding the call connection request over a public switched telephone network.

7. A method comprising:

receiving a first call connection request, at a computer, the first call connection request associated with a first translated number data comprising a translation of number data indicative of a first telephone number associated with a second call connection request that originated from an internet protocol (IP) device on a Voice Over Internet Protocol (VoIP) network, the first translated number data further comprising location data indicative of a geographical location of the IP device from which the second call connection request originated instead of a geographical location that is assigned to a user of the IP device, where the first telephone number is indicative of a first emergency telephone number dialed by the user of the IP device; and

translating the first translated number data, with the computer, into a second translated number data indicative of a second telephone number based on the location data indicative of the geographical location of the IP device from which the second call connection request originated instead of the geographical location that is assigned to the user of the IP device, wherein the second telephone number indicates where the first call connection request is to be connected, where the second telephone number is indicative of a second emergency telephone number associated with the geographical location of the IP device.

8. The method of claim 7 wherein translating the first translated number data further comprises applying a translation pattern to the first translated number data.

9. The method of claim 8 wherein the first translated number data comprises a string of alphanumeric digits, and applying the translation pattern to obtain a second translated number data indicative of a second telephone number comprises matching a site code contained within the string.

10. The method of claim 8 wherein applying the translation pattern comprises stripping a pre-dot digit from the first translated number data, wherein the first translated number data comprises a string of alphanumeric digits, and stripping the pre-dot digit comprises identifying and discarding a set of alphanumeric digits that correspond to a geographical area in which the geographical location of the IP device from which the second call connection request originated is located.

11. The method of claim 7 comprising connecting the first call connection request using the second translated number data.

12. The method of claim 11 comprising associating a Calling Line Identification (CLID) with the first call connection request so that the first call connection request can be matched to the geographical location of the IP device from which the second call connection request originated.

13. The method of claim 8 wherein applying the translation pattern exploits a Calling Search Space (CSS).

14. The method of claim 13 wherein the CSS contains the translation pattern, and the translation pattern comprises a translation pattern for an emergency number.

19. The method of claim 11, wherein connecting the first call connection request using the second translated number data comprises connecting the first call connection request over a public switched telephone network.

15. A voice over Internet Protocol (VoIP) system comprising:

a call data receiver configured to receive call data comprising number data indicative of a first telephone number associated with a first call connection request that originated at an Internet Protocol (IP) device on a VoIP network, the call data further comprising location data indicative of a geographical location of the IP device from which the first call connection request originated instead of a geographical location assigned to a user of the IP device, where the first telephone number is indicative of a first emergency telephone number associated with the geographical location assigned to the user of the IP device;

a translator configured to translate the number data into translated number data indicative of a second telephone number based on the location data indicative of the geographical location of the IP device from which the first call connection request originated instead of the geographical location assigned to the user of the IP device, where the second telephone number is indicative of a second emergency telephone number associated with the geographical location of the IP device;

a number data associator configured to associate the first call connection request with the translated number data;

a call forwarder configured to forward the first call connection request to a second call connection request associated with the translated number data indicative of the second telephone number; and

a call connection request receiver configured to receive the second call connection request associated with the translated number data indicative of the second telephone number, the translated number data associated with the first call connection request and the location data indicative of the geographical location of the IP device from which the first call connection request originated instead of the geographical location assigned to the user of the IP device.

16. Logic encoded in one or more non-transitory, tangible media for execution and when executed by a processor, performs the steps of:

receiving call data comprising number data indicative of a first telephone number associated with a call connection request that originated from an internet protocol (IP) device on a voice over internet protocol (VoIP) network, the call data further comprising location data indicative of a geographical location of the IP device from which the call connection request originated instead of a location assigned to a user of the IP device, where the first telephone number is indicative of a first emergency telephone number dialed by the user of the IP device;

translating the number data into translated number data indicative of a second telephone number based on the location data indicative of the geographical location of the IP device from which the call connection request originated instead of the location assigned to the user of the IP device, where the second telephone number is indicative of a second emergency telephone number associated with the geographical location of the IP device; and

forwarding the call connection request to the second telephone number.

17. Logic encoded in one or more non-transitory, tangible media for execution and when executed by a processor, is executable to:

receive a first call connection request associated with a first translated number data comprising a translation of a first number data indicative of a first telephone number associated with a second call connection request that originated from an internet protocol (IP) device on a Voice Over Internet Protocol (VoIP) network and the first call connection request further associated with location data that indicates a geographical location of the IP device from which the second call connection request originated instead of a geographical location assigned to a user of the IP device, where the first telephone number is indicative of a first emergency telephone number associated with the geographical location assigned to the user of the IP device;

translate the first translated number data into a second translated number data indicative of a second telephone number based on the location data that indicates the geographical location of the IP device from which the second call connection request originated instead of the geographical location assigned to the user of the IP device, where the second telephone number is indicative of a second emergency telephone number associated with the geographical location of the IP device; and

forward the first call connection request to the second telephone number.