Patent · US Expired

Method to calculate true round trip propagation delay and user equipment location in WCDMA/UTRAN

US6681099B1 · kind B1 · utility

90Cited by

7References

33Claims

0Family size

Assignee

Nokia Networks Oy · FI

Inventors

Yrjo Keranen · Topeno, FI
Timo Viero · Espoo, FI

Key dates

Filing date	May 15, 2000
Grant date	Jan 20, 2004
Priority date	—
Expiry date	May 15, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG01S2013/466
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method of determining the location of a user equipment includes determining a round trip time for downlink from at least three nodes to a user equipment, determining the transmission timing delay at the user equipment for the round trip time of each of the three nodes, and determining a distance from each of the at least three nodes using the round trip time and the transmission timing delay.

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