System for localizing objects in an indoor environment using a wireless communication network

Patent metadata

Field	Value
Publication number	US-2023171728-A1
Application number	US-202217984308-A
Country	US
Kind code	A1
Filing date	Nov 10, 2022
Priority date	Nov 30, 2021
Publication date	Jun 1, 2023
Grant date	—

Abstract

A system for localizing an object in an indoor environment. The system uses a plurality of wireless access points and at least one cooperative mobile network device. The cooperative mobile network device is connected to at least one of the wireless access points. The wireless access points and the cooperative mobile network device sense first and second signal propagation data of wireless signals transmitted via the wireless communication network. The cooperative mobile network device evaluates the second signal propagation data and determines its own position based on the data and the positions of the wireless access points. A position of an object is obtained based on the evaluated first and second signal propagation data, the positions of the wireless access points and the determined position of the cooperative mobile network device.

First claim

1 . A system for localizing an object in an indoor environment, the system comprising:
a wireless communication infrastructure, configured to enable wireless communication inside the indoor environment via a wireless communication network, the wireless communication infrastructure comprising:
a plurality of wireless access points, configured to provide mobile network devices with access to the wireless communication network;
at least one cooperative mobile network device in communication with at least one of the plurality of wireless access points; and
a processing device;
wherein each of the wireless access points is configured to sense first signal propagation data of wireless signals transmitted via the wireless communication network; wherein the cooperative mobile network device is configured to sense second signal propagation data of wireless signals transmitted via the wireless communication network; wherein the cooperative mobile network device is configured to evaluate the second signal propagation data and to determine its own position based on the evaluated second signal propagation data and positions of the wireless access points; and wherein the processing device is configured to evaluate the first signal propagation data and to extract localization data indicative of the position of an object located in the indoor environment based on the evaluated first signal propagation data, on the evaluated second signal propagation data, on the determined position of the cooperative mobile network device, and on the positions of the wireless access points.

2 . The system of claim 1 , wherein the at least one cooperative mobile network device is configured to simultaneously at least one of establish or utilize connections to at least two wireless access points.

3 . The system of claim 1 , wherein at least one of the first signal propagation data or the second signal propagation data comprises correlation data of at least one of the wireless access points or the cooperative mobile network device.

4 . The system of claim 1 , wherein at least one of the first signal propagation data sensed by the wireless access points or the second signal propagation data sensed by the at least one cooperative mobile network device comprises channel state information, CSI.

5 . The system of claim 1 , wherein at least one of the first signal propagation data sensed by the wireless access points or the second signal propagation data sensed by the cooperative mobile network device comprises at least one of a spatial, a frequency related, an amplitude related or a time related variation of wireless signals within the indoor environment.

6 . The system of claim 1 , wherein at least one of the wireless access points or the cooperative mobile network device are Wifi enabled devices according to a Wifi standard in IEEE 802.11.

7 . The system of claim 1 ,
wherein the processing device is configured to execute a machine learning algorithm on the first signal propagation data and the second signal propagation data, the machine learning algorithm being configured to extract the localization data based on training data; and wherein the training data are obtained by at least one of an object position measurement system a predetermined test object arrangement within the indoor environment.

8 . The system of claim 7 , wherein the machine learning algorithm is configured to extract positions of static objects within the indoor environment.

9 . The system of claim 1 , wherein the extraction of localization data comprises an evaluation of time series and a spectral analysis to detect moving objects.

10 . The system of claim 1 ,
wherein at least one of the first signal propagation data sensed by the wireless access points or the second signal propagation data sensed by the cooperative mobile network device is obtained from wireless signals reflected from a passive object, the passive object not sending any wireless signals, and wherein the localization data is indicative of the position of the passive object.

11 . The system of claim 1 ,
wherein at least one of the first signal propagation data sensed by the wireless access points or the second signal propagation data sensed by the cooperative mobile network device is obtained by at least one of the wireless access points or the cooperative mobile network device passively capturing wireless signals exchanged between a non-cooperative mobile network device and the wireless access point to which the non-cooperative mobile network device is connected; and wherein the localization data is indicative of the position of the non-cooperative wireless network device.

12 . The system of claim 1 , wherein at least one of the first signal propagation data or the second signal propagation data is provided as raw data from a physical layer of the wireless communication infrastructure.

13 . The system of claim 1 , wherein the indoor environment is a passenger cabin of an aircraft.

14 . An aircraft, comprising:
a passenger cabin; and a system according to claim 1 .

Assignees

• Airbus Sas

Inventors

• Geyer Fabien
• Multerer Thomas
• Schupke Dominic

Classifications

• G01S13/878

  Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector (G01S13/874 takes precedence) · CPC title

• G01S13/765 Primary

  with exchange of information between interrogator and responder · CPC title

• H04W64/003 Primary

  locating network equipment · CPC title

• G01S13/003

  Bistatic radar systems; Multistatic radar systems · CPC title

• H04W64/006 Primary

  with additional information processing, e.g. for direction or speed determination · CPC title