Method for locating mobile devices in a common frame of reference

US10356556B2 · kind B2 · utility

Assignee

• Comissariat a l'Energie Atomique et aux Energies Alternatives · FR

Inventors

• Alex Pereira Da Silva · Saint-Martin-d'Hères, FR
• Sylvain Leirens · Grenoble, FR

Key dates

• Filing date: Oct 3, 2018
• Grant date: Jul 16, 2019
• Expiry date: Oct 3, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W4/33
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method for locating mobile devices, a trajectory (T1, T2) is reconstructed modelling a movement made by each mobile device during which the mobile device carries out measurements of an indicator linked to the distance separating it from access terminals (B1-B5) to a communication network. From these measurements, the locations of the terminals are calculated in a frame of reference linked to each mobile device. A procrustean analysis is then performed to determine, for each mobile device, a geometric transformation that transforms the locations of the terminals in the frame of reference linked to the mobile device into locations transformed in a common frame of reference. From this determination, the location of each terminal transformed in the common frame of reference is superimposed with a location of the terminal in the common frame of reference. Finally, the corresponding geometric transformation is applied to the trajectory of each mobile device.