Mannesmann Aktiengesellschaft

Ralph Wolters

Ronald Barker

G&uuml;nther Weber

A method for monitoring the correct operation of an electronic debiting appliance which is arranged in a vehicle and makes log entries on a mobile memory module in the context of a use accounting system for the use of a road network or for the entering of a stipulated geographical zone by the vehicle. The use of the road or geographical zone which is subject to charges is automatically recognized by the debiting appliance on the basis of data which is held in a carried memory device and identifies the roads or geographical zones which are subject to charges, and on the basis of data which can be received wirelessly in the vehicle from a navigation satellite system for the purpose of determining the particular current geographical vehicle position. A control device is used which is also set up for receiving data from the navigation satellite system. Besides the time of address, both the control device and the debiting appliance also record the respective data received from the navigation satellite system at this time on the respective nonvolatile memory. During the later control on the debits entered on the mobile storage medium in the vehicle being controlled, a check is carried out to determine whether the navigation satellite system's data recorded in the nonvolatile memory in this vehicle at the time of address by the control device corresponds to the navigation satellite system's data recorded for this time by the control device itself.

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Schonstett, Germany

Ralph Wolters