Process for obtaining traffic data
First Claim
1. A process for obtaining traffic situation data in a compressed form, while largely maintaining data reliability, comprising the steps of:
- determining a speed profile with a vehicle that moves in traffic and belongs to a sampling vehicle fleet;
wirelessly transmitting speed profile data to a traffic center from time to time;
continually determining current speed values of the vehicle, in the vehicle;
in the vehicle, determining characterizing numbers that characterize discrete segments of the vehicle speed profile from the current speed values, the characterizing numbers being characteristic of a curve of the speed actually travelled in a given segment;
continuously forming the discrete segments of the speed profile during a vehicle trip, by defining an end of a current segment, and thus a beginning of a new segment, based on results of a comparison between the speed profile of the vehicle and a speed profile of at least one virtual reference vehicle; and
when a new segment begins, storing the characterizing numbers of current segment just finished in the vehicle at least until being transmitted to the traffic center.
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Accused Products
Abstract
A process for obtaining traffic situation data in a compressed form, while largely maintaining the reliability of the data, whereby a speed profile for a vehicle that moves in traffic and belongs to a sampling vehicle fleet ("floating car") is found and transmitted wirelessly to a traffic center from time to time. The has the following features:
a) The current speed of the vehicle is found continually in the vehicle.
b) In the vehicle, characterizing numbers that characterize discrete segments of the vehicle speed profile are found from the current speed values, which characterizing numbers are characteristic of the curve of the speed actually travelled in the given segment.
c) The discrete segments of the speed profile are formed continuously during the vehicle trip, in that the end of a current segment, and thus the beginning of a new segment, is defined on the basis of the results of a comparison between the speed profile of the vehicle and the speed profile of at least one virtual reference vehicle.
d) When a new segment begins, the characterizing numbers of the segment just finished are stored in the vehicle at least until being transmitted to the traffic center.
70 Citations
23 Claims
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1. A process for obtaining traffic situation data in a compressed form, while largely maintaining data reliability, comprising the steps of:
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determining a speed profile with a vehicle that moves in traffic and belongs to a sampling vehicle fleet; wirelessly transmitting speed profile data to a traffic center from time to time; continually determining current speed values of the vehicle, in the vehicle; in the vehicle, determining characterizing numbers that characterize discrete segments of the vehicle speed profile from the current speed values, the characterizing numbers being characteristic of a curve of the speed actually travelled in a given segment; continuously forming the discrete segments of the speed profile during a vehicle trip, by defining an end of a current segment, and thus a beginning of a new segment, based on results of a comparison between the speed profile of the vehicle and a speed profile of at least one virtual reference vehicle; and when a new segment begins, storing the characterizing numbers of current segment just finished in the vehicle at least until being transmitted to the traffic center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification