<p>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.</p>
申请公布号
EP2074840(A4)
申请公布日期
2015.08.05
申请号
EP20070852431
申请日期
2007.09.26
申请人
TELECOMMUNICATION SYSTEMS, INC.
发明人
HINES, JOHN GORDON;JOHNSON, DARRIN;CROY, JONATHAN A.