Mannesmann Aktiengesellschaft

Werner Schulz

Stefan Vieweg

Josef Heimann

Uwe Albrecht

Christian Berwanger

Ralf Kriesinger

Christian Hort

Ralf Kolb

Klaus M&ouml;hlenkamp

Uwe K&ouml;hler

J&uuml;rgen Gaida

Bettina Hoischen

Thomas Muller

Thorsten Gill

Wolfgang Iierbig

Karlheinz Schlottbom

Derk Meyer

Christel Sievers

A digital card of a highway network is provided in the form of a traffic file in a traffic data control center and in a terminal. Sections of streets or lanes or groups of streets or lanes are each represented as a segment in the digital card. Data pertaining to a chain of segments which follow each other in a numerical sequence in the highway network are combined in the control center into traffic data packets. Each traffic data packet contains (a) an identifier symbol representing the identity of the segment at one end of the chain, (b) a numerical chain segment symbol representing the total number of segments in numerical sequence in the chain, and (c) at least one condition symbol representing the condition of at least one of the segments in the chain The traffic data packets are transmitted to the terminal, where they are decoded and route information is output to a terminal user.

Method for transmitting traffic information

Optimized, universal transmission of traffic information and the coding thereof by different terminals is permitted in a simple, inexpensive and efficient manner by apparatuses and a method for transmitting traffic information relating to a road traffic network from a traffic information control center to at least one terminal. In the control center, the segments of the road traffic network which are affected by the traffic information are either coded using a location coordinate table, available in the control center, in a form which represents the location of the segments, or are coded using a segment table, available in the control center, in a form which represents the identity of the segments without their location. The control center transmits to the terminal a selection information item which indicates which of the two above codings is used in the transmitted information.

Binary transmission system

The invention relates to a process for data exchange via a communications channel between a central unit, which processes, stores and provides data, and a data terminal device. Initially, a permanently unchanged application-independent query structure (general query structure) is stored both in the central unit and in the data terminal device, as are a small number of permanently unchanged application-independent response formats. For each application, the specific query structure is defined on the basis of the general query structure and is stored in the central unit in the form of a parameter set. As needed, the data terminal device requests from the center unit, via the communications channel, a specific query structure not yet stored in the data terminal device and receives and stores the applicable parameter set. To implement a query functionality, the applicable specific query structure is created in the data terminal device from the general query structure on the basis of the applicable parameter set and, after being at least partially filled out with values by the user, is transmitted to the central unit. The data terminal device makes responses transmitted from the central unit in response to queries available to the user based on one of the stored response formats, which is designated in the particular response.

Method and device for data transmission between a central unit and a data terminal

Method and terminal unit for the spatial allocation of information referring to one location

A method and system for providing and transmitting individualized traffic information from a traffic network to a user via a telephone network and at least one voice channel. Traffic information is requested by the user from an information center that is capable of searching a traffic database and includes a voice generator for transmitting searched traffic information to the user in spoken form using the voice channel. The user request to the information center is character coded and a reference code is assigned to the traffic information being searched responsive to the user's request (call) and then transmitted to the user.

Method and system for providing and transmitting individualized traffic information

Condensing of information is achieved by a terminal device, a traffic center and a method for informing a user of a terminal device about the traffic situation in a traffic network using traffic information transmitted from a traffic center to the terminal device over a communications channel. Traffic information relating to at least one section in the traffic network is converted to information relating to zone in the traffic network, and zone-oriented traffic information is displayed to the user of the terminal device.

Transmission of localized traffic information

The redundancy of transmitted traffic information or of traffic information which is to be transmitted is optimized by a method for transmitting traffic information from a traffic information center to at least one terminal device in a vehicle via a publicly receivable (e.g., DAB, RDS-TMC) communications channel or via a private communications channel (e.g., mobile radio), wherein a first reference zone is defined at or around the known or presumed stopping place of at least one vehicle to which information is to be conveyed at a first time point. At least a second reference zone is defined at or around at least one presumed stopping place of the vehicle at a second time point lying in the future in relation to the first time point. Traffic information generated for a reference zone and for a respective future time point with forecasting and/or traffic information determined for the current time point and for the respective current reference zone are/is compiled. Data representing traffic information with the time point to which it relates and/or the reference zone to which it relates are transmitted.

Method for transmitting traffic information and devices for implementing said method

A method for determing travel route data, especially within the framework of navigation of a vehicle, using a digital map which is kept in a central control station and in which static and dynamic parameters are stored by route section for the detected traffic routes, wherein the static parameters include at least structural features of the respective traffic route. The dynamic parameters include at least one conductance value and one load function of the respective section of the traffic route. The dynamic parameters are derived one time for the presetting of starting values from the structural features and, from that point, are continuously adapted to the real conditions of the respective sections of the traffic route with ensured availability of dynamic data independent from static parameters. The travel route data are determined on the basis of the relevant dynamic parameters.

Method for determining itinerary data

A process for the wireless transmission of data to a traffic sensor for assessing traffic in segments of a road network includes collecting data in a plurality of floating cars that travel in traffic and have sensor system for collecting the data. A current driving profile is formed in each floating car from the collected data. Actual values of characteristic driving profile properties are derived from the current driving profile and expected values of the characteristic driving profile properties are formed based on preestablished traffic situation information. A difference between the actual values and the expected values is determined and if the difference is determined to be a serious deviation from the expected values based on preestablished decision criteria, the data collected by the sensors is transmitted to a traffic center.

Method and device for transmitting data on traffic assessment

A method and system for forecasting traffic flows at selected locations or in selected sections of road network, which method includes continually determining actual location positions of a plurality of vehicles of a spot check vehicle fleet, storing on the vehicles the determined actual positions as route data of a route traveled by the vehicles, transmitting the route data at intervals from more than one vehicle to a traffic computer containing a digital road map, and determining traffic flow data from the route data using the traffic computer. The traffic flow data includes information concerning traffic density. The inventive method then continues with assigning the traffic flow data to the selected locations and/or sections using the traffic computer, determining and/or updating statistical traffic flow data as time-dependent empirical values from the traffic flow data using the computer, registering actual driving activity data with driving activity sensors over a predefined physical area surrounding the selected locations and sections, transmitting the actual driving activity data to the traffic computer, and forecasting the traffic flows, using the computer, by starting from the actual driving activity data and extrapolating associated traffic flow data and factoring in the time-dependent empirical values.

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Meerbusch, Germany

Werner Schulz