Presentation by M. Charlier and B. Quoitin, UMONS

1. TEKK Tour Digital Wallonia 2017
Towards Large-Scale, High-Density Indoor
Ultra Wideband Geolocation Systems
M. Charlier and B. Quoitin
(bruno.quoitin@umons.ac.be)
Computer Networking Research Unit
Faculty of Sciences
University of Mons

2. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 2/17
Computer Networking
Research Unit
IoT Lab
Sensors,
signal
processing,
embedded
Wireless
data
transmission
Network
integration
Cloud
storage
Data
processing

3. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 3/17
data
collection
point
Core IoT Components
●
Design, improve and integrate core IoT components
– node-to-node communications, routing, software energy efficiency, …
●
Focus on standard IoT protocols (IETF)
– IPv6, 6LoWPAN, RPL, CoAP
Sensing region
(building, city, field,
industry, body, ...)
border
router
Internet
remote
user
radio
Battery
sensor
nodes
T°C, humidity,
presence, CO2
, ...
source
relays

4. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 4/17
(Indoor) Positioning Systems
http://www.bordersystem.be/
http://www.digitalmeetsculture.net

5. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 5/17
(Indoor) Positioning Systems
●
Global Positioning System (GPS)
– does not work well indoors
●
Wifi / Bluetooth-based
– narrowband (a few 10s of MHz)
– ranging based on signal strength
●
UWB (Ultra Wideband)
– use of very short RF pulses ; bandwidth
larger than 500 MHz ; low power spectral
density
– works well in multi-path environments
accuracy ~ meters
accuracy ~ decimeters
accuracy ~ centimeters

6. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 6/17
UWB-based Positioning
●
Architecture of System
A1
A3
A2
fixed
anchors

7. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 7/17
UWB-based Positioning
●
Architecture of System
A1
A3
A2
M1
fixed
anchors
mobile
nodes
M2

8. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 8/17
UWB-based Positioning
●
Architecture of System
A1
A3
A2
M1
fixed
anchors
mobile
nodes
M2
low-cost prototype (BoM < 50 EUR/node)
off-the-shelf UWB transceivers, embedded platform
open-source implementation in popular RTOS

9. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 9/17
UWB-based Positioning
●
Architecture of System
A1
A3
A2
M1
fixed
anchors
mobile
nodes
M2
two-way-ranging

10. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 10/17
UWB-based Positioning
●
Architecture of System
A1
A3
A2
M1
fixed
anchors
mobile
nodes
M2

11. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 11/17
UWB-based Positioning
●
Architecture of System
A1
A3
A2
M1
fixed
anchors
mobile
nodes
M2

12. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 12/17
UWB-based Positioning
12000 ranging samples
error ≤ 3cm for 50% of samples
error ≤ 5cm for 90% of samples

13. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 13/17
UWB-based Positioning
2D localization
most errors ≤ 5cm

14. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 14/17
We are heading for...

15. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 15/17
We are heading for...
●
increased coverage O(10000 m2
)
●
larger number of anchors O(100)
●
larger number of mobile nodes O(1000)
●
higher ranging / positioning rate O(100/s)
●
…

16. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 16/17
We are heading for...
●
increased coverage ~ 10000 m2
●
larger number of anchors ~ 100
●
larger number of mobile nodes ~ 1000
●
higher ranging / positioning rate ~ 100/s
●
…
How ?
– channel access scheduling (e.g. time-division multiplexing)
– non-ranging based techniques : Time Difference of Arrival (TDoA), Angle of
Arrival (AoA), hybrid methods, ...
– sensor fusion : mobile node’s accelerometer / compass, received signal strength,
…
– ...

17. M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 17/17
Thank you for your attention !
Questions ?