Systems And Methods For IP And VoIP Device Location Determination
First Claim
1. A method of verifying a previously determined position of a device connected to a network relative to a fixed coordinate system, said method comprising the steps of:
- determining position of said device relative to said fixed coordinate system;
gathering a first set of information regarding attachment of said device to said network indicative of an attachment to said network at said determined position;
storing said first set of gathered information;
receiving a request for location information of said device;
gathering a second set of information regarding attachment of said device to said network indicative of a unique attachment to said network;
comparing said first set of information to said second set of information; and
verifying in near real time that said device is at said previously determined position if said comparison results in surpassing a predetermined threshold of characteristic similarity.
1 Assignment
0 Petitions
Accused Products
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.
53 Citations
13 Claims
-
1. A method of verifying a previously determined position of a device connected to a network relative to a fixed coordinate system, said method comprising the steps of:
-
determining position of said device relative to said fixed coordinate system; gathering a first set of information regarding attachment of said device to said network indicative of an attachment to said network at said determined position; storing said first set of gathered information; receiving a request for location information of said device; gathering a second set of information regarding attachment of said device to said network indicative of a unique attachment to said network; comparing said first set of information to said second set of information; and verifying in near real time that said device is at said previously determined position if said comparison results in surpassing a predetermined threshold of characteristic similarity. - View Dependent Claims (2, 3, 4)
-
-
5. A method of selecting a process of determining the position of a device connected to a computer network relative to a fixed coordinate system, said method comprising the steps of:
-
estimating a position of a device relative to a fixed coordinate system to a first level of accuracy by communicating over a computer network with a network operations center, wherein said network operations center contains a database of locations of other devices on said computer network; obtaining data over said computer network regarding characteristics of a positioning system relative to said position estimated to said first level of accuracy; attempting to receive a plurality of signals from said positioning system; determining the quality of said plurality of signals from said positioning system; and selecting between, based on said quality level of said signals from said positioning system, a first process where a time a reference of said positioning system is obtained over said computer network and a second process where said time reference of said positioning system is obtained from said positioning system. - View Dependent Claims (6, 7)
-
-
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. - View Dependent Claims (9, 10, 11, 12, 13)
-
Specification