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Title:
INERTIAL TRACKING BASED DETERMINATION OF THE POSITION OF A MOBILE DEVICE CARRIED BY A USER IN A GEOGRAPHICAL AREA
Document Type and Number:
WIPO Patent Application WO/2016/042296
Kind Code:
A3
Abstract:
A mobile device (100) caried by a user has sensors providing acceleration and orientation information. These are processed to provide trajectory for the device. The processing includes improved methods using different modules (1, 2, 3,5, 6, 7) for classifying the motion (1) and detecting a user's steps (5), tracking the orientation (3) and acceleration (2) of the device (100), estimating the length of the user's steps (6) and estimating the heading (7) of the user. The trajectories are compared to a map and corrected by the constraints provided by the map. Parameters of the methods of producing the trajectories are optimised on the basis of maximising probability of the trajectory found by the map matching given the indicated trajectory.

Inventors:
TRIGONI, Agathoniki (54 Franklin Road, Oxford OX3 7SA, OX3 7SA, GB)
XIAO, Zhuoling (Department of Computer Science, University of OxfordWolfson Building,Parks Road, Oxford OX1 3QD, OX1 3QD, GB)
Application Number:
GB2015/052615
Publication Date:
June 30, 2016
Filing Date:
September 10, 2015
Export Citation:
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Assignee:
ISIS INNOVATION LIMITED (Buxton Court, 3 West Way, Oxford OX2 0SZ, OX2 0SZ, GB)
International Classes:
G01C21/12; G01C21/20; G01C22/00
Domestic Patent References:
WO2011063285A12011-05-26
WO2014074837A12014-05-15
Foreign References:
US20130106697A12013-05-02
US20140067262A12014-03-06
US20130338961A12013-12-19
US20020002863A12002-01-10
US20110087450A12011-04-14
EP2527791A12012-11-28
US20120136573A12012-05-31
US20120072166A12012-03-22
US20130332065A12013-12-12
US20130332064A12013-12-12
Other References:
MELANIA SUSI ET AL: "Motion Mode Recognition and Step Detection Algorithms for Mobile Phone Users", SENSORS, vol. 13, no. 2, 24 January 2013 (2013-01-24), pages 1539 - 1562, XP055130598, DOI: 10.3390/s130201539
XIAO ZHUOLING ET AL: "Lightweight map matching for indoor localisation using conditional random fields", IPSN-14 PROCEEDINGS OF THE 13TH INTERNATIONAL SYMPOSIUM ON INFORMATION PROCESSING IN SENSOR NETWORKS, IEEE, 15 April 2014 (2014-04-15), pages 131 - 142, XP032613203, ISBN: 978-1-4799-3146-0, [retrieved on 20140630], DOI: 10.1109/IPSN.2014.6846747
Attorney, Agent or Firm:
LEGG, Cyrus James Grahame et al. (Abel & Imray, 20 Red Lion StreetLondon,GB, WC1R 4PQ, WC1R 4PQ, GB)
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