Integrated services user part (ISUP)/session initiation protocol (SIP) gateway for unlicensed mobile access (UMA) emergency services call flow

• US 8,489,064 B2
• Filed: 12/30/2011
• Issued: 07/16/2013
• Est. Priority Date: 07/18/2005
• Status: Expired due to Fees

• Current Assignee: TeleCommunication Systems Inc (Comtech Telecommunications Corporation)
• Original Assignee: TeleCommunication Systems Inc (Comtech Telecommunications Corporation)
• Inventors: Mitchell, Don
• Primary Examiner(s): Gauthier, Gerald
• Assistant Examiner(s): King, Simon
• Application Number:
  US13/341,461
• Publication Number:
  US 20120100826A1
• Time in Patent Office: 564 Days
• Field of Search: 455/404.1, 379/37, 370/352
• US Class Current: 455/404.1
• CPC Class Codes: G01S 5/0018 Transmission from mobile station to base station
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/1033 Signalling gateways
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/401 wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04M 2242/04 for emergency applications
• CPC Class Codes: H04M 2242/14 with services dependent on location where the service is an information service H04M2242/15; services independent of location H04M3/42229
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04M 3/42348 Location-based services which utilize the location information of a target
• 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
• CPC Class Codes: H04M 7/123 where the packet-switched network is an Internet Protocol Multimedia System-type network
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/025 using location based information parameters
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• 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 64/00 : Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 76/50 : for emergency connections
• CPC Class Codes: H04W 80/02 : Data link layer protocols
• CPC Class Codes: H04W 88/16 : Gateway arrangements

Abstract

An ISUP/SIP gateway is implemented to encapsulate SS7 location requests from a switched telephone network into an Internet protocol SIP message including one or more location objects. The ISUP/SIP gateway is implemented between a mobile switching center (MSC) and a VoIP positioning center (VPC) to provide support of unlicensed mobile access (UMA) voice over Internet Protocol (VoIP) call routing, e.g., for E9-1-1, 4-1-1, 2-1-1, etc. The disclosed location objects that are encapsulated into a SIP message includes calling party number, called party number, CGI, International Mobile Subscriber Identity (IMSI), mobility indicator, and/or access point MAC address. At the SIP/ISUP gateway, SS7 integrated services user part (ISUP) location request messages are encapsulated within SIP. The SIP encapsulated location request message is then routed over the Internet to a destination VoIP positioning center (VPC).

Claims

1. A method of providing location based support for an emergency call, comprising:

receiving, at a Session Initiation Protocol (SIP) gateway, a request for geographic location information associated with an unlicensed mobile access (UMA) wireless device initiating an emergency call;

encapsulating, at said SIP gateway, said request in a SIP message; and

retrieving, via said SIP encapsulated request transmitted from said SIP gateway to a voice over Internet protocol (VoIP) positioning center, routing information associated with said emergency call.

2. The method of providing location based support for an emergency call according to claim 1, wherein:

said emergency call originates at a dual-mode phone.

3. The method of providing location based support for an emergency call according to claim 2, wherein:

said dual-mode phone is capable of initiating said emergency call via a WiFi network.

4. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

a calling party number.

5. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

a calling party number; and

a called party number.

6. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

an access point MAC address.

7. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

calling party number;

called party number; and

access point MAC address.

8. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

calling party number; and

called party number;

wherein said request conforms to common gateway interface (CGI).

9. The method of providing location based support for an emergency call according to claim 8, wherein said encapsulated request further comprises:

an access point MAC address.

10. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

calling party number;

called party number; and

International Mobile Subscriber Identity (IMSI).

11. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

calling party number; and

mobility indicator.

12. The method of providing location based support for an emergency call according to claim 11, wherein said encapsulated request further comprises:

an access point MAC address.

13. The method of providing location based support for an emergency call according to claim 1, wherein said encapsulated request comprises:

calling party number; and

International Mobile Subscriber Identity (IMSI).

14. A Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call, comprising:

a receiver, at a Session Initiation Protocol (SIP) gateway, to receive a request for geographic location information associated with an unlicensed mobile access (UMA) wireless device initiating an emergency call;

an encapsulator, at said SIP gateway, to encapsulate said request in a SIP message; and

a retriever to retrieve, via a voice over Internet protocol (VoIP) positioning center, routing information associated with said emergency call.

15. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein:

said emergency call originates at a dual-mode phone.

16. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 15, wherein:

said dual-mode phone is capable of initiating said call via a WiFi network.

17. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

a calling party number.

18. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

a calling party number; and

a called party number.

19. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

an access point MAC address.

20. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

calling party number;

called party number; and

access point MAC address.

21. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

calling party number; and

called party number.

22. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 21, wherein said encapsulated request further comprises:

an access point MAC address.

23. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

calling party number;

called party number; and

International Mobile Subscriber Identity (IMSI).

24. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

calling party number; and

mobility indicator.

25. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 24, wherein said encapsulated request further comprises:

an access point MAC address.

26. The Session Initiation Protocol (SIP) gateway for providing location based support for an emergency call according to claim 14, wherein said encapsulated request comprises:

calling party number; and

International Mobile Subscriber Identity (IMSI).