Abstract: A system and method for Dedicated Short-Range Communication (DSRC) between beacons and onboard units of a road toll system, wherein the beacons have a system-wide key and the onboard units have only individual keys, which are respectively formed from the system-wide key on the basis of a derivation code specific to the onboard units, wherein upon a communication from the onboard unit the derivation code is transmitted to the beacon in order to enable the beacon to emulate the individual key to encrypt/decrypt the communication with the onboard unit and/or for access to data stored in the onboard unit, and wherein upon communications with consecutive beacons the onboard unit transmits varying derivation codes.

Abstract: Onboard unit for charging occupant number-dependent tolls for a vehicle in the context of a road toll system, comprising a Doppler radar or UWB impulse radar that can be directed onto the vehicle interior for measuring movements and generating at least one measurement signal representing these; and an evaluation device, which is configured to detect signal patterns in the measurement signal that are typical for heart or respiratory activity of an occupant, to count those signal patterns which occur simultaneously at an observation time, and to calculate toll data as a function of that count value.

Abstract: Onboard unit for charging occupant number-dependent tolls for a vehicle in the context of a road toll system, comprising a Doppler radar or UWB impulse radar that can be directed onto the vehicle interior for measuring movements and generating at least one measurement signal representing these; and an evaluation device, which is configured to detect signal patterns in the measurement signal that are typical for heart or respiratory activity of an occupant, to count those signal patterns which occur simultaneously at an observation time, and to calculate toll data as a function of that count value.

Abstract: A system and method for Dedicated Short-Range Communication (DSRC) between beacons and onboard units of a road toll system, wherein the beacons have a system-wide key and the onboard units have only individual keys, which are respectively formed from the system-wide key on the basis of a derivation code specific to the onboard units, wherein upon a communication from the onboard unit the derivation code is transmitted to the beacon in order to enable the beacon to emulate the individual key to encrypt/decrypt the communication with the onboard unit and/or for access to data stored in the onboard unit, and wherein upon communications with consecutive beacons the onboard unit transmits varying derivation codes.