Injection of location object into routing SIP message
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.
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).