Kapsch Trafficcom Ag

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Jasja Tijink

Thomas Scheider

Oliver Nagy

Refi-Tugrul Güner

Franz Weimann

Jan Kersten

Michael Polt

Herbert Scheiber

Methods are provided for updating a digital road map in which road segments having segment lengths are stored. At least two vehicles are equipped with at least one respective onboard unit generating position readings. If a first set of position readings of a first onboard unit can be associated with a road segment, a first path length is determined based on the position readings of the first set. If a second set of position readings of a second onboard unit can be associated with the road segment, a second path length is determined based on the position readings of the second set. An average path length is calculated based on at least the first and second path lengths. If the average path length deviates from the stored segment length, the average path length is stored as an updated stored segment length of this road segment in the digital road map.

Method for updating a digital road map

Methods are provided for determining the length of a path traveled by a vehicle using an onboard unit that generates a sequence of position readings and a related position quality index for each position reading. A set of consecutive position readings is extracted from the sequence. Position readings are discarded having position quality indices falling below a threshold. A set quality index is determined based on the number of position readings of the set or on the position quality indices. If the set quality index exceeds a threshold, the path length is determined based on mutual distances of consecutive position readings of the set. Otherwise, the path length is determined using a digital road map composed of road segments by associating the position readings of the set with at least one road segment, and determining the path length based on the segment length of the at least one road segment.

Method for determining the length of a path traveled by a vehicle

A method for authenticating vehicle devices that can conduct dedicated short-range communications with beacons of a road tolling system. The beacons have a system-wide key and the vehicle devices only have individual keys. A supply of pairs of individual keys and associated derivation identifiers is stored in the vehicle device, and for consecutive communications the vehicle device selects a different pair from the supply in each case and uses said pair for the respective communication. The vehicle device is triggered by an interrogation device to perform at least the part of a radio communication in which the vehicle device sends the selected derivation identifier, and the selected derivation identifier is received in the interrogation device and is compared with derivation identifiers of the supply stored in the interrogation device. The vehicle device is then authenticated in the case of consistency of the comparison.

Method for authenticating onboard units

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Mödling, Austria

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