Patent ID: 9035798
Filing Date: 2015-05-19
Classification: G07C,G08C,G08G

Abstract:
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.