Injection of location object into routing SIP message

• US 20080261619A1
• Filed: 09/26/2007
• Published: 10/23/2008
• Est. Priority Date: 09/26/2006
• Status: Abandoned Application

• Current Assignee: TeleCommunication Systems Inc (Comtech Telecommunications Corporation)
• Original Assignee: TeleCommunication Systems Inc (Comtech Telecommunications Corporation)
• Inventors: Johnson, Darrin, Hines, John Gordon, Croy, Jonathan A.
• Application Number:
  US11/902,845
• Publication Number:
  US 20080261619A1
• Time in Patent Office: Days
• US Class Current: 455/456.1
• CPC Class Codes: H04L 2101/385 Uniform resource identifier for session initiation protocol [SIP URI]
• CPC Class Codes: H04L 61/30 Managing network names, e.g. use of aliases or nicknames name-to-address mapping H04L61/45
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/52 specially adapted for the location of the user terminal
• 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: H04Q 2213/1307 Call setup
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13141 Hunting for free outlet, circuit or channel
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/13337 Picturephone, videotelephony
• CPC Class Codes: H04Q 2213/13348 Channel/line reservation
• CPC Class Codes: H04Q 2213/13389 LAN, internet
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services

Abstract

The function of determination of location is separated from the function of gathering information based on determined location by use of a Location Object (LO) proxy between an initiating VoIP capable device and a positioning center. The LOProxy queries an appropriate location database using a location key, and injects a PIDF-LO into a routing SIP message otherwise without location. A SIP request without location is received from a VoIP capable device. The SIP request contains messages indicating the type of location generator or service needed. A location key (like a telephone number or SIP URI), in addition to the type of location generator or service needed, is included in a SIP request. A location object (LO) broker may be used between a routing SIP message and a positioning center to direct a routing SIP message to an appropriate one of a plurality of location object (LO) proxies.

Claims

1. A method for separating determination of location from gathering information based on determined location, comprising:

receiving an incoming Session Internet Protocol (SIP) message at a location object proxy;

determining location of an initiator of said SIP message;

injecting a location object into said SIP message; and

passing said SIP message with location object (LO) to a positioning center.

2. The method for separating determination of location from gathering information based on determined location according to claim 1, wherein said determining location comprises:

querying a database with a unique location key; and

receiving in response a location of an initiator of said SIP message.

3. The method for separating determination of location from gathering information based on determined location according to claim 2, wherein said database comprises:

a static location database.

4. The method for separating determination of location from gathering information based on determined location according to claim 2, wherein said unique location key comprises:

a telephone number.

5. The method for separating determination of location from gathering information based on determined location according to claim 2, wherein said unique location key comprises:

a uniform resource identifier (URI).

6. Apparatus to separate determination of location from gathering information based on determined location, comprising:

means for receiving an incoming Session Internet Protocol (SIP) message at a location object proxy;

means for determining location of an initiator of said SIP message;

means for injecting a location object into said SIP message; and

means for passing said SIP message with location object (LO) to a positioning center.

7. The apparatus to separate determination of location from gathering information based on determined location according to claim 6, wherein said means for determining location comprises:

means for querying a database with a unique location key; and

means for receiving in response a location of an initiator of said SIP message.

8. The apparatus to separate determination of location from gathering information based on determined location according to claim 7, wherein said database comprises:

a static location database.

9. The apparatus to separate determination of location from gathering information based on determined location according to claim 7, wherein said unique location key comprises:

a telephone number.

10. The apparatus to separate determination of location from gathering information based on determined location according to claim 7, wherein said unique location key comprises:

a uniform resource identifier (URI).