System and methods for IP and VoIP device location determination
US7961717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2006 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Mar 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2242/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 broad band 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.