| 摘要 |
#CMT# #/CMT# The device has dedicated short range communication short range communication (DSRC) transceiver that establishes a DSRC radio interface. A marking vehicle (5) detects traffic or toll violation of on-board unit (3) or of vehicle (2), and transmits a marker to on-board unit through DSRC radio interface, if violation exists. The on-board unit determines the position to periodically broadcast position messages containing the respective current position upon receipt of marker. A control unit detects vehicle based on position messages broadcast by on-board unit. #CMT# : #/CMT# An independent claim is included for a control method for road toll system. #CMT#USE : #/CMT# Control device for road toll system based on on-board units carried by vehicles such as truck or passenger car. #CMT#ADVANTAGE : #/CMT# The on-board unit determines the position to periodically broadcast position messages, thus prevents violating vehicles that are not picked up within an acceptable time frame from incessantly continuing to broadcast the position messages. The on-board units (OBU) are equipped with little additional functionality so as to wirelessly identify themselves, quasi on their own, as an OBU of a marked violating vehicle. Hence, the automatic controls of vehicles, including the on-board units are carried out even in large, broadly branched road systems that contain high-speed and opposing traffic routes. The control units include comparatively little equipment because they do not ascertain violations, but only detect emissions of marked OBUs and thus track down violation vehicles. Thus, because of the low equipment requirements, the control units are provided in large numbers and also specifically conduct time-consuming local inspections. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of the operating principle of the control devices. 1 : Road toll system 2 : Vehicle 3 : OBUs 4 : Back office 5 : Marking vehicle. |
