Systems and methods for ip and voip device location determination

Abstract

A method and system for precise position determination of general Internet Protocol (IP) network-connected devices. A method enables use of remote intelligence located at strategic network points to distribute relevant assistance data to IP devices with embedded receivers. Assistance is tailored to provide physical timing, frequency and real time signal status data using general broadband communication protocols. Relevant assistance data enables several complementary forms of signal processing gain critical to acquire and measure weakened or distorted in-building Global Navigation Satellite Services (GNSS) signals and to ultimately extract corresponding pseudo-range time components. A method to assemble sets of GNSS measurements that are observed over long periods of time while using standard satellite navigation methods, and once compiled, convert using standard methods each pseudo-range into usable path distances used to calculate a precise geographic position to a known degree of accuracy.

1 .- 7 . (canceled) 
     
     
         8 . A method of presenting a located call from an IP device connected to an IP network to an emergency services dispatch center, said method comprising the steps of:
 dialing an emergency telephone number from an IP device connected to an IP network to generate a call, wherein said device is capable of receiving signals from a positioning system;   connecting said IP device through said IP network to a network interconnection capable of interconnecting said IP network to a public-switched-telephone-network (PSTN);
 connecting said IP device to an emergency services network attached to said PSTN; 
 providing a location of said IP device to said emergency services network; 
 selecting an appropriate emergency services dispatch center based at least in part on said location; 
 transmitting said location from said emergency services network to said emergency services dispatch center; and 
 presenting said call to said selected emergency services dispatch center. 
   
     
     
         9 . A method as set forth in  claim 8 , wherein said network interconnection is an IP network to PSTN gateway. 
     
     
         10 . A method as set forth in  claim 8 , wherein said network interconnection is a media gateway. 
     
     
         11 . A method as set forth in  claim 8 , wherein said providing comprises:
 interrogating an IP device location database.   
     
     
         12 . A method as set forth in  claim 8 , wherein said providing is performed by said IP device. 
     
     
         13 . A method as set forth in  claim 8 , wherein said providing comprises:
 including the position of said IP device in standard SIP protocol signaling messaging in a VOIP emergency call request into said IP network.