Method for Determining Traffic Flow Data in a Road Network
First Claim
1. A method for determining traffic flow data in a road network with road segments of which at least some are equipped with radio beacons for DSRC radio communications with vehicle-mounted on-board units, which are configured to determine their position and record measurement data of their vehicle or their environment, comprising the following steps carried out by an on-board unit:
- a) passing a first radio beacon and receiving a request message, which at least includes a start location and a stop location, from the first radio beacon via a first DSRC radio communication;
b) determining if a position of the on-board unit is within a predetermined range of the start location, and starting recording of measurement data;
c) determining if the position of the on-board unit is within a predetermined range of the stop location, and stopping the recording of the measurement data; and
d) transmitting the recorded measurement data to a next radio beacon that is passed by the on-board unit along its way via a second DSRC radio communication.
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Accused Products
Abstract
Determining traffic flow data in a road network comprising passing a first radio beacon and receiving a request message that at least includes a start location and a stop location; determining if an on-board unit position is within a predetermined range of the start location, and responsively starting a recording of measurement data; determining if the on-board unit position is within a predetermined range of the stop location, and responsively stopping the recording of the measurement data; and transmitting the recorded measurement data to a next radio beacon that is passed by the on-board unit.
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Citations
14 Claims
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1. A method for determining traffic flow data in a road network with road segments of which at least some are equipped with radio beacons for DSRC radio communications with vehicle-mounted on-board units, which are configured to determine their position and record measurement data of their vehicle or their environment, comprising the following steps carried out by an on-board unit:
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a) passing a first radio beacon and receiving a request message, which at least includes a start location and a stop location, from the first radio beacon via a first DSRC radio communication; b) determining if a position of the on-board unit is within a predetermined range of the start location, and starting recording of measurement data; c) determining if the position of the on-board unit is within a predetermined range of the stop location, and stopping the recording of the measurement data; and d) transmitting the recorded measurement data to a next radio beacon that is passed by the on-board unit along its way via a second DSRC radio communication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification