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1. (WO2017156574) ESTIMATING LOCATIONS OF MOBILE DEVICES IN A WIRELESS TRACKING SYSTEM

Pub. No.:    WO/2017/156574    International Application No.:    PCT/AU2017/050220
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Sat Mar 11 00:59:59 CET 2017
IPC: G01S 5/00
H04W 64/00
Applicants: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
Inventors: HEDLEY, Mark
LI, Shenghong
Title: ESTIMATING LOCATIONS OF MOBILE DEVICES IN A WIRELESS TRACKING SYSTEM
Abstract:
A wireless tracking system comprises mobile devices and stationary devices at known locations. The system receives a first radio measurement indicative of a first propagation path length and receives sensor data indicative of the movement of the first mobile device. The sensor data is of a type different to the radio measurement. The system then determines a historical location of the first mobile device based on the first radio measurement and the sensor data and determines error data indicative of a difference between a historical radio measurement and the historical location and stores the error data associated with the historical location. The system can then receive a second radio measurement indicative of a second propagation path length of radio frequency radiation and determine an estimated location of the second mobile device based on the second radio measurement and the stored error data.