Date post: | 21-Jan-2018 |
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TEKK Tour Digital Wallonia 2017
Towards Large-Scale, High-Density IndoorUltra Wideband Geolocation Systems
M. Charlier and B. Quoitin([email protected])
Computer Networking Research UnitFaculty of SciencesUniversity of Mons
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 2/17
Computer Networking Research Unit
IoT Lab
Sensors,signal
processing,embedded
Wirelessdata
transmission
Networkintegration
Cloudstorage
Dataprocessing
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 3/17
datacollection
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, ...)
borderrouter
Internet
remoteuser
radio
Bat
tery
sensornodes
T°C, humidity, presence, CO
2, ...
source
relays
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 4/17
(Indoor) Positioning Systems
http://www.bordersystem.be/
http://www.digitalmeetsculture.net
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
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 6/17
UWB-based Positioning
● Architecture of System
A1
A3
A2
fixedanchors
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 7/17
UWB-based Positioning
● Architecture of System
A1
A3
A2
M1fixed
anchorsmobilenodes
M2
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 8/17
UWB-based Positioning
● Architecture of System
A1
A3
A2
M1fixed
anchorsmobilenodes
M2
low-cost prototype (BoM < 50 EUR/node)off-the-shelf UWB transceivers, embedded platformopen-source implementation in popular RTOS
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 9/17
UWB-based Positioning
● Architecture of System
A1
A3
A2
M1fixed
anchorsmobilenodes
M2
two-way-ranging
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 10/17
UWB-based Positioning
● Architecture of System
A1
A3
A2
M1fixed
anchorsmobilenodes
M2
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 11/17
UWB-based Positioning
● Architecture of System
A1
A3
A2
M1fixed
anchorsmobilenodes
M2
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
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 13/17
UWB-based Positioning
2D localizationmost errors ≤ 5cm
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 14/17
We are heading for...
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)● …
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,
…– ...
M. Charlier and B. Quoitin (UMONS) TEKK Tour Digital Wallonia 2017 17/17
Thank you for your attention !
Questions ?