ROAD TOLL SYSTEM
First Claim
1. A road toll system comprising:
- a satellite navigation receiver implementing a position tracking function;
a first data processor for determining a route taken based on satellite navigation data provided from the receiver, the satellite navigation data being associated with a variable identity, and for determining a road toll level; and
a second data processor for receiving the road toll level provided by the first data processor,wherein the satellite navigation receiver is adapted to obtain the determined road toll level from the second data processor using the variable identity.
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Accused Products
Abstract
A road toll system comprises a vehicle-mounted unit having a satellite navigation receiver. A first data processing means determines a route taken 5 based on satellite navigation data provided from the receiver, and the satellite navigation data is associated with a variable identity. A road toll level is derived. A second data processing means receives the road toll level provided by the first data processing means, and the satellite navigation obtains the determined road toll level from the second data processing means using the 10 variable identity. This provides a thin client scenario (the receiver does not implement the map calculations), but with data security corresponding to a thick client solution. Thus, the map matching and trip cost computation steps are delegated by the on-board unit to an external unit, but this delegation is performed anonymously, so that no data sent for external processing 15 compromises the privacy of the data.
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Citations
19 Claims
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1. A road toll system comprising:
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a satellite navigation receiver implementing a position tracking function; a first data processor for determining a route taken based on satellite navigation data provided from the receiver, the satellite navigation data being associated with a variable identity, and for determining a road toll level; and a second data processor for receiving the road toll level provided by the first data processor, wherein the satellite navigation receiver is adapted to obtain the determined road toll level from the second data processor using the variable identity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of calculating a road toll within a road toll system, the method comprising:
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using a satellite navigation receiver to implement a position tracking function; determining a route taken based on satellite navigation data provided by the receiver to a first processor, the satellite navigation data being associated with a variable identity, and determining a road toll level; receiving the road toll level provided by the first data processor at a second data processor; and obtaining the determined road toll level at the receiver from the second data processor using the variable identity. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification