ROAD TOLL SYSTEM
First Claim
1. A road toll system comprising:
- a vehicle-mounted unit having a satellite navigation receiver implementing a position tracking function to obtain a position tracking information;
a device for determining a route taken by the vehicle based on the position tracking information;
at least one sensor for detecting a local vehicle condition which is independent of satellite navigation signals and providing sensor information, and which local vehicle condition is dependent on one of an absolute position of the vehicle and a change in position of the vehicle; and
a device for validating authenticity of the position tracking information using the sensor information.
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0 Petitions
Accused Products
Abstract
A road toll system comprising a vehicle-mounted unit having a satellite navigation receiver (52) implementing a position tracking function. The system further comprises means for determining the routes taken by the vehicle based on the position tracking information and a sensor (54,56,57,58,60,61,62) for detecting a local vehicle condition which is independent of the satellite navigation signals, and which local vehicle condition is dependent on the absolute position of the vehicle or a change in the position of the vehicle. The authenticity of the position tracking information is validated using the sensor information. This system uses a satellite navigation receiver to enable infrastructure-free road tolling to be implemented. The system further provides a way of preventing a so-called fake GPS attack, i.e. providing false GPS data to reduce the road tolls payable. This is achieved by providing validation of the GPS position information by comparing with independent information collected by the vehicle.
99 Citations
25 Claims
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1. A road toll system comprising:
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a vehicle-mounted unit having a satellite navigation receiver implementing a position tracking function to obtain a position tracking information; a device for determining a route taken by the vehicle based on the position tracking information; at least one sensor for detecting a local vehicle condition which is independent of satellite navigation signals and providing sensor information, and which local vehicle condition is dependent on one of an absolute position of the vehicle and a change in position of the vehicle; and a device for validating authenticity of the position tracking information using the sensor information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 24)
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15. A method for validating position tracking information provided by a vehicle-mounted unit having a satellite navigation receiver, the method comprising:
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determining a route taken by a vehicle based on the position tracking information provided by the vehicle mounted unit; detecting a local vehicle condition which is independent of satellite navigation signals, and which local vehicle condition is dependent on one of an absolute position of the vehicle and a change in position of the vehicle; and validating the authenticity of the position tracking information using the sensor information. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 25)
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Specification