Patent · US Active

Method for performing measurements and positioning in a network based WLAN positioning system

US8848565B2 · kind B2 · utility

3Cited by
4References
17Claims
0Family size

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Key dates

Filing dateJul 12, 2012
Grant dateSep 30, 2014
Priority date—
Expiry dateJan 18, 2033

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04W64/00
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A network based positioning (NBP) system that improves the accuracy of wireless positioning systems by concurrently performing RTT ranging operations and associated TDOA operations to generate a number of difference measurement values from which the position of a station device (STA) can be determined using, for example, multilateration techniques. Because the RTT values and their corresponding TDOA values both include the turn-around time (TAT) of the STA, subtracting TDOA values from their corresponding RTT values generates difference measurement values that do not include such TAT values of the STA. In this manner, the STA position can be determined without estimating the STA's TAT.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.