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GNSS/DSRC OBU for e-Toll
Vladimir Vejvoda
consortium includes companiesPRINCIP and ICE. The main activitiesare both in the field of transporttelematic and the development ofvehicle electronics.
GNSS/DSRC On Board Unit
• EC/2004/52• EC/1999/60• CARDME, PISTA, CESARE,TIS• CEN278 (EN 12253,12795,12834,13372)• Communication modules
– DSRC (5.8GHz)– GNSS (16channels, SuperSense)– GSM (GPRS TS 03.60/23.060)
Modules inside OBU
Power connector
FROG: Fuzzy-probabilistic resolution of Routes Or Gantries
FROG: MapBlock
Benefits of dividing mapinto MapBlocks• Easier updates of map.
• System is functional without full map set.
• Map is smaller to download.
FROG: map data
Visualization of FROG1mapmatching on real data.
FROG: map matching
• Probabilistic map matching
• Uses road topology
• Fast and high-performance
Map matching produce events
• Utilized road leg
• Virtual gantry activated
• GPS no signal
FROG: expert system
Diagnostic expert system
• Validates events in log
• Resolution of toll routes
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
FROG: expert system
Tests: GPS position error
Tests: available GPS satellites
Tests: available GSM - BTS
Tests: DSRC
• Fine-tuning of the communication between DSRCand control processor
• Laboratory stage of enforcement tests by means ofa portable bi-directional DSRC communicator.
• Tests in the real ETC environment
Conclusions
The present testing has proved that OBU itself,GNSS signal availability and quality of GPRSservices on the tested infrastructure fulfil therequirements for proper ETC system operation.
Thank you very much for your attention
