DETERMINING A LOCAL EMERGENCY DIAL-STRING

• US 20070206730A1
• Filed: 01/26/2007
• Published: 09/06/2007
• Est. Priority Date: 02/20/2006
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Polk, James M.
• Granted Patent: US 8,068,586 B2
• Time in Patent Office: Days
• US Class Current: 379/37
• CPC Class Codes: H04L 61/4505 using standardised directories; using standardised directory access protocols
• CPC Class Codes: H04L 61/4535 using an address exchange platform which sets up a session between two nodes, e.g. rendezvous servers, session initiation protocols [SIP] registrars or H.323 gatekeepers
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems

Abstract

Determining a local emergency dial-string includes determining location information of an endpoint in a network. The location information indicates a current location of the endpoint. An emergency dial-string is received. The emergency dial-string is determined according to the location information, and the emergency dial-string operates to contact an emergency service associated with the current location of the endpoint.

Claims

1. A method for determining a local emergency dial-string, comprising:

determining location information of an endpoint in a network, the location information indicating a current location of the endpoint; and

receiving an emergency dial-string, the emergency dial-string determined according to the location information, the emergency dial-string operates to contact an emergency service associated with the current location of the endpoint.

2. The method of claim 1, further comprising attaching to the network, the attachment initiating determination of the emergency dial-string.

3. The method of claim 1, further comprising sending a request for the emergency dial-string.

4. The method of claim 1, further comprising sending a request for the emergency dial-string, the request comprising the location information of the endpoint.

5. The method of claim 1, wherein determining location information comprises implementing a self-discovery procedure to determine the location information.

6. The method of claim 1, wherein determining location information comprises sending a request for the location information to a Dynamic Host Configuration Protocol (DHCP) server.

7. The method of claim 1, wherein the emergency dial-string identifies the emergency service associated with the emergency-dial string.

8. The method of claim 1, wherein receiving the emergency dial-string comprises receiving the emergency dial-string from a selected one of a DHCP server and a registrar server.

9. The method of claim 1, wherein receiving the emergency dial-string comprises receiving the emergency dial-string in a DHCP response from a DHCP server.

10. The method of claim 1, wherein receiving the emergency dial-string comprises receiving the emergency dial-string in a Session Initiation Protocol (SIP) response from a registrar server.

11. The method of claim 1, wherein receiving the emergency dial-string comprises:

receiving a first emergency dial-string for a first emergency service; and

receiving a second emergency dial-string for a second emergency service.

12. Logic embodied in a computer readable medium for determining a local emergency dial-string, the logic operable to:

determine location information of an endpoint in a network, the location information indicating a current location of the endpoint; and

receive an emergency dial-string, the emergency dial-string determined according to the location information, the emergency dial-string operates to contact an emergency service associated with the current location of the endpoint.

13. The logic of claim 12, further operable to attach to the network, the attachment initiating determination of the emergency dial-string.

14. The logic of claim 12, further operable to send a request for the emergency dial-string.

15. The logic of claim 12, further operable to send a request for the emergency dial-string, the request comprising the location information of the endpoint.

16. The logic of claim 12, wherein determining location information comprises implementing a self-discovery procedure to determine the location information.

17. The logic of claim 12, wherein determining location information comprises sending a request for the location information to a Dynamic Host Configuration Protocol (DHCP) server.

18. The logic of claim 12, wherein the emergency dial-string identifies the emergency service associated with the emergency-dial string.

19. The logic of claim 12, wherein receiving the emergency dial-string comprises receiving the emergency dial-string from a selected one of a DHCP server and a registrar server.

20. The logic of claim 12, wherein receiving the emergency dial-string comprises receiving the emergency dial-string in a DHCP response from a DHCP server.

21. The logic of claim 12, wherein receiving the emergency dial-string comprises receiving the emergency dial-string in a Session Initiation Protocol (SIP) response from a registrar server.

22. The logic of claim 12, wherein receiving the emergency dial-string comprises:

receiving a first emergency dial-string for a first emergency service; and

receiving a second emergency dial-string for a second emergency service.

23. A system for determining a local emergency dial-string, comprising:

an endpoint operable to;

determine location information in a network, the location information indicating a current location of the endpoint; and

receive an emergency dial-string, the emergency dial-string determined according to the location information, the emergency dial-string operates to contact an emergency service associated with the current location of the endpoint; and

a Dynamic Host Configuration Protocol (DHCP) server operable to provide the location information of the endpoint.

24. The system of claim 23, the endpoint further operable to attach to the network, the attachment initiating determination of the emergency dial-string.

25. The system of claim 23, the endpoint further operable to send a request for the emergency dial-string.

26. The system of claim 23, the endpoint further operable to send a request for the emergency dial-string, the request comprising the location information of the endpoint.

27. The system of claim 23, the endpoint further operable to implement a self-discovery procedure to determine the location information.

28. The system of claim 23, the DHCP server further operable to:

receive a request for the emergency dial-string from the endpoint;

determine the emergency dial-string according to the location information; and

send the emergency dial-string to the endpoint.

29. The system of claim 23, further comprising a registrar server operable to:

receive a request for the emergency dial-string from the endpoint;

determine the emergency dial-string according to the location information; and

send the emergency dial-string to the endpoint.

30. The system of claim 29, the registrar server further operable to:

send the location information to an external server; and

receive the emergency dial-string from the external server according to the location information.

31. The system of claim 23, the endpoint further operable to:

receive a first emergency dial-string for a first emergency service; and

receive a second emergency dial-string for a second emergency service.

32. A system for determining a local emergency dial-string, comprising:

means for determining location information of an endpoint in a network, the location information indicating a current location of the endpoint; and

means for receiving an emergency dial-string, the emergency dial-string determined according to the location information, the emergency dial-string operates to contact an emergency service associated with the current location of the endpoint.