Location object proxy broker

• US 20080267172A1
• Filed: 09/26/2007
• Published: 10/30/2008
• 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: Croy, Jonathan, Johnson, Darrin, Hines, John
• Application Number:
  US11/902,861
• Publication Number:
  US 20080267172A1
• Time in Patent Office: Days
• US Class Current: 370/352
• 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 adding a standard presence information data format location object (PIDF-LO) data element to a SIP message comprises:

receiving an inbound SIP message without location from a VoIP capable device, said SIP message containing an indication as to a type of location generator or service requested; and

using a unique location key in addition to the said type of location generator or service needed to add a PIDF-LO (LO) to said SIP message.

2. The method for adding a standard presence information data format location object (PIDF-LO) data element to a SIP message according to claim 1, wherein said unique location key comprises:

a telephone number.

3. The method for adding a standard presence information data format location object (PIDF-LO) data element to a SIP message according to claim 1, wherein said unique location key comprises:

a SIP uniform resource identifier (URI).

4. Apparatus for adding a standard presence information data format location object (PIDF-LO) data element to a SIP message comprises:

means for receiving an inbound SIP message without location from a VoIP capable device, said SIP message containing an indication as to a type of location generator or service requested; and

means for adding a PIDF-LO (LO) to said SIP message, using a unique location key in addition to the said type of location generator or service needed.

5. The apparatus for adding a standard presence information data format location object (PIDF-LO) data element to a SIP message according to claim 4, wherein said unique location key comprises:

a telephone number.

6. The apparatus for adding a standard presence information data format location object (PIDF-LO) data element to a SIP message according to claim 4, wherein said unique location key comprises:

a SIP uniform resource identifier (URI).

7. A method for directing a routing SIP message to a proper location object proxy, comprising:

injecting a location object (LO) broker between a routing SIP message and a positioning center required to gather location information relating to a location of an initiator of said SIP message;

determining an appropriate one of a plurality of location object (LO) proxies to handle said routing SIP message; and

directing said routing SIP message to said determined appropriate one of said plurality of location object (LO) proxies.