EP1141909B1 - Method for transmitting traffic information - Google Patents

Method for transmitting traffic information Download PDF

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Publication number
EP1141909B1
EP1141909B1 EP99964397A EP99964397A EP1141909B1 EP 1141909 B1 EP1141909 B1 EP 1141909B1 EP 99964397 A EP99964397 A EP 99964397A EP 99964397 A EP99964397 A EP 99964397A EP 1141909 B1 EP1141909 B1 EP 1141909B1
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EP
European Patent Office
Prior art keywords
segment
segments
traffic
traffic information
situation
Prior art date
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Revoked
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EP99964397A
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German (de)
French (fr)
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EP1141909A1 (en
Inventor
Werner Dr.Rer.Nat. Schulz
Stefan Dr. Vieweg
Christian Dipl.Ing. Berwanger
Ralf Kriesinger
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ATX Europe GmbH
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Vodafone GmbH
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Priority claimed from DE19941648A external-priority patent/DE19941648C2/en
Application filed by Vodafone GmbH filed Critical Vodafone GmbH
Publication of EP1141909A1 publication Critical patent/EP1141909A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/55—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for traffic information
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]

Definitions

  • the invention relates to a method for transmitting traffic information and Devices for performing the method.
  • RDS-TMC relating to a road traffic network Traffic information from a traffic information center to a terminal transmit, one for each segment of the road network relevant traffic information is transmitted and the segment-wise transmitted Traffic information in the terminal with a coding / decoding table there into one suitable form for the representation for the terminal user are recoded.
  • This widespread procedure is however in the transmission of traffic information very complex with regard to the amount of information to be transmitted, in particular when transmitting over several segments of the road network unchanged traffic information.
  • the object of the present invention is to create a method and Devices that are as simple and inexpensive as possible Allow transmission of traffic information.
  • the task is completed by solved the subjects of the independent claims.
  • the invention enables traffic information to be transmitted several segments of a road network with less to be transmitted Amount of information.
  • Traffic information to be transmitted is in particular States of one or more segments of the road network, such as for example the travel time in this segment, the average speed there, the number of vehicles, the length of the traffic jam, construction sites, ghost drivers, Weather conditions.
  • the transmission according to the invention is both for over several segments constant states (and thus traffic information to be transmitted) such as also for traffic information regarding spatially successive segments suitable with different states.
  • For the transmission of traffic information regarding one over several spatial successive segments of a road network continuous For example, the state of the first or last of these segments, the number of Segments and condition indicated.
  • segment table in the terminal (expediently in the same form as in the Traffic Information Center).
  • segment table expediently the in Road network successive segments consecutive Segment numbers.
  • a segment number can be added to the segment number Representation instruction for a (for example optically representable or acoustically digital map); for example, a chain of Segments (which in the real road network have one or more lanes one or more directions of a freeway) represent a lane in represent a two-dimensional representation of the road network.
  • On Segment can represent a motorway section, so that when a Traffic information stating the segment and its state in the in Terminal segment table stored a text sequence for this segment (like e.g. A57 motorway between Düsseldorf and Cologne) is selected, possibly a text sequence in addition to the state (for example "traffic jam") is selected and these are output acoustically.
  • the transmission is expediently carried out by radio, in particular mobile radio. Especially Short message transmission is suitable.
  • radio in particular mobile radio.
  • Short message transmission is suitable.
  • digital cellular network is broadcasting (cell broadcast) possible.
  • Figure 1 shows a section of a road network with one from the left to right-hand road, consisting of segments 1 to 4 (whereby here the number of a segment is also identical as its reference number is used), a bottom-up street with the segments 5, 6, 7, 8 and one formed at the intersection of segments 1 to 4 Street with the further street branching off from segments 5 to 8 Street with segments 9, 10 etc. as well as one from bottom to top Street with segments 11, 12.
  • the traffic information in the control center coded with a table and with an identical one Table in the terminal for presentation to the user (for example optically in a two-dimensional digital map of the road network or acoustically) recoded. If, for example, in segments 1, 2, 3 the left to right there is a low average speed in the road running in FIG. 1, can one segment identification of one of the three segments and one for this State coding representing the state of the segment are transmitted, as is usual with RDS-TMC.
  • Identification of segment 1 for example "1"
  • the number of the Transmitted traffic information designated segments 1 to 3, ie a "3” and either a state of all segments transmitted here (1 to 3) or in the Sequence of the segments (1 to 3) each the state of a segment.
  • This is it is necessary for the control center and the terminal to be identical Numbering order of the segments is fixed. As Figure 1 illustrates, this is along the street from left to right with increasing numbers possible. However, it becomes problematic at intersections, especially forks, as in Figure 1 left.
  • FIG. 2 there is a segment to represent the sequence Pointer to the next segment to be regarded as the next segment in the direction of travel specified, namely segment 1, segment 2, segment 2, Segment 3, segment 4, etc.
  • an indication representing a terminal user such as "A8 - Stuttgart” etc. shown, which is output with traffic information for this segment can be.
  • the text information provided is particularly for one acoustic output suitable.
  • For an issue on a digital card is a To provide a reference to the digital map (such as coordinates). For example, if in Terminal of the traffic information center for segment chain segment 1, 2, 3 one Status information (traffic jam) is transmitted, the segment 1, the number 3 and the Status information "0", which is decoded with a status table, as "traffic jam" transmitted.
  • FIG. 3 shows a block diagram of the elements of the center and the terminal and represents the transmission of information from the control center to the terminal
  • Traffic information center 20 receives or generates traffic information to be transmitted, which are stored in the memory 21.
  • the traffic information can particularly rely on information from stationary detectors along roads of the traffic network, on mobile detectors in vehicles in the traffic network as well based on other sources.
  • Traffic information 21 to be transmitted is stored in the traffic information package generation device 22 coded according to the invention.
  • a segment table 23 (for example according to Figure 2) used.
  • the ones to be transferred Traffic information 21, relating to traffic jams in segment 1, traffic jams in segment 2 and Traffic jams in segment 3 are thus coded as "1, 3, 0, end” (where 1 Segment 1 means 3 means 3 segments and 0 means average speed 0 means congestion and "end” is an end flag).
  • the end flag is here used for illustration only.
  • the specialist are for clear identification other protocol-related variants are known at the end of the message.
  • This encoded information is used by the transmission device 33 for transmission transmitted.
  • the transmission device 33 can, for example, be a mobile radio transmission device or an access to a mobile radio transmission device.
  • these are in the terminal 24 received by the receiver 25 and decoded by a decoder 26.
  • the decoder uses a segment table 27 (which of the Corresponds to segment table 23).
  • the decoded traffic information can the Users. They can also be saved (36). Traffic information can in particular also be used to calculate an optimized Route in the terminal 24 can be used by optimal travel times or if possible few traffic jams etc. are aimed for.
  • a status information ("0") for all segments (1, 2, 3) of a segment chain can also individually for each segment (1, 2, 3) of the designated (“1 3") segment chain whose state ("0 0 0") are specified.
  • the distinction can be made from Be hit by a flag transmitted at the beginning or by Comparison of the number (here once / or three times "0") of the state information before one (Binary) "end” flag with the transmitted chain segment number "3".
  • the invention can be implemented as a program in the control center and in the terminal, However, it is not limited to this and can also be used as an electronic circuit be formed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Traffic Control Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

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.</PTEXT>

Description

Die Erfindung betrifft ein Verfahren zur Übertragung von Verkehrsinformationen und Vorrichtungen zur Durchführung des Verfahrens.The invention relates to a method for transmitting traffic information and Devices for performing the method.

Dem Fachmann ist bekannt, durch RDS-TMC ein Straßenverkehrsnetz betreffende Verkehrsinformationen von einer Verkehrsinformationszentrale an ein Endgerät zu übermitteln, wobei für jeweils ein Segment des Straßenverkehrsnetzes eine dieses betreffende Verkehrsinformation übermittelt wird und die segmentweise übermittelten Verkehrsinformationen im Endgerät mit einer dortigen Kodier-/Dekodiertabelle in eine zur Darstellung für den Endgerätbenutzer geeignete Form umkodiert werden. Dieses weitverbreitete Verfahren ist jedoch bei der Übermittlung von Verkehrsinformationen sehr aufwendig hinsichtlich der zu übertragenden Informationsmenge, insbesondere bei der Übertragung von über mehrere Segmente des Straßenverkehrsnetzes unveränderten Verkehrsinformationen.The person skilled in the art is familiar with RDS-TMC relating to a road traffic network Traffic information from a traffic information center to a terminal transmit, one for each segment of the road network relevant traffic information is transmitted and the segment-wise transmitted Traffic information in the terminal with a coding / decoding table there into one suitable form for the representation for the terminal user are recoded. This widespread procedure is however in the transmission of traffic information very complex with regard to the amount of information to be transmitted, in particular when transmitting over several segments of the road network unchanged traffic information.

Aufgabe der vorliegenden Erfindung ist die Schaffung eines Verfahrens bzw. von Vorrichtungen, welche möglichst einfach und kostengünstig eine effiziente Übertragung von Verkehrsinformationen ermöglichen. Die Aufgabe wird jeweils durch die Gegenstände der unabhängigen Ansprüche gelöst.The object of the present invention is to create a method and Devices that are as simple and inexpensive as possible Allow transmission of traffic information. The task is completed by solved the subjects of the independent claims.

Die Erfindung ermöglicht eine Übertragung von Verkehrsinformationen betreffend mehrere Segmente eines Straßenverkehrsnetzes mit geringer zu übertragender Informationsmenge. Zu übertragende Verkehrsinformationen sind insbesondere Zustände eines oder mehrerer Segmente des Straßenverkehrsnetzes, wie beispielsweise die Reisezeit in diesem Segment, die dortige Durchschnittsgeschwindigkeit, die Zahl der Fahrzeuge, die Staulänge, Baustellen, Geisterfahrer, Wetterbedingungen. The invention enables traffic information to be transmitted several segments of a road network with less to be transmitted Amount of information. Traffic information to be transmitted is in particular States of one or more segments of the road network, such as for example the travel time in this segment, the average speed there, the number of vehicles, the length of the traffic jam, construction sites, ghost drivers, Weather conditions.

Die erfindungsgemäße Übertragung ist sowohl für über mehrere Segmente gleichbleibende Zustände (und damit zu übertragende Verkehrsinformationen) wie auch für Verkehrsinformationen betreffend räumlich aufeinanderfolgende Segmente mit unterschiedlichen Zuständen geeignet.The transmission according to the invention is both for over several segments constant states (and thus traffic information to be transmitted) such as also for traffic information regarding spatially successive segments suitable with different states.

Zur Übermittlung von Verkehrsinformationen betreffend einen über mehrere räumlich aufeinanderfolgende Segmente eines Straßenverkehrsnetzes kontinuierlichen Zustand wird beispielsweise das erste oder letzte dieser Segmente, die Zahl der Segmente und der Zustand angegeben. Zur Übermittlung von Verkehrsinformationen betreffend unterschiedliche Zustände (Durchschnittsgeschwindigkeiten etc.) mehrerer räumlich aufeinanderfolgender Segmente eines Straßenverkehrsnetzes wird zweckmäßig das erste oder letzte dieser aufeinanderfolgenden Segmente, die Zahl der Segmente und in der räumlichen Reihenfolge der Segmente jeweils für mindestens ein Segment (zweckmäckig genau ein Segment) dessen Zustand angegeben. In beiden Fällen entfällt vorteilhafterweise die Notwendigkeit der Identifikation jedes der Segmente mit Ausnahme des ersten oder letzten Segmentes, so daß die zu übertragende Informationsmenge erheblich reduziert wird.For the transmission of traffic information regarding one over several spatial successive segments of a road network continuous For example, the state of the first or last of these segments, the number of Segments and condition indicated. For the transmission of traffic information regarding different states (average speeds, etc.) of several spatially successive segments of a road network expediently the first or last of these successive segments, the number of the segments and in the spatial order of the segments for at least one segment (expediently exactly one segment) its condition specified. In both cases, the need for Identification of each of the segments with the exception of the first or last segment, so that the amount of information to be transmitted is significantly reduced.

Im Endgerät liegt eine Segmenttabelle (zweckmäßig in identischer Form wie in der Verkehrsinformationszentrale) vor. In der Segmenttabelle weisen zweckmäßig die im Straßenverkehrsnetz aufeinanderfolgenden Segmente aufeinanderfolgende Segmentnummern auf. Zu den Segmentnummern der Segmente kann eine Darstellungsanweisung für eine (beispielsweise optisch darstellbare oder akustisch inbezugnehmbare) digitale Karte gespeichert sein; beispielsweise kann eine Kette von Segmenten (welche im realen Straßenverkehrsnetz eine oder mehrere Fahrbahnen einer oder mehrerer Fahrtrichtungen einer Autobahn repräsentieren) eine Fahrbahn in einer zweidimensionalen Darstellung des Straßenverkehrsnetzes repräsentieren. Ein Segment kann einen Autobahnabschnitt repräsentieren, so daß bei Übertragung einer Verkehrsinformation unter Angabe des Segmentes und dessen Zustandes in der im Endgerät gespeicherten Segmenttabelle eine Textsequenz zu diesem Segment (wie beispielsweise Autobahn A57 zwischen Düsseldorf und Köln) herausgesucht wird, eventuell zusätzlich zum Zustand eine Textsequenz (beispielsweise "Stau") herausgesucht wird und diese akustisch ausgegeben werden. There is a segment table in the terminal (expediently in the same form as in the Traffic Information Center). In the segment table expediently the in Road network successive segments consecutive Segment numbers. A segment number can be added to the segment number Representation instruction for a (for example optically representable or acoustically digital map); for example, a chain of Segments (which in the real road network have one or more lanes one or more directions of a freeway) represent a lane in represent a two-dimensional representation of the road network. On Segment can represent a motorway section, so that when a Traffic information stating the segment and its state in the in Terminal segment table stored a text sequence for this segment (like e.g. A57 motorway between Düsseldorf and Cologne) is selected, possibly a text sequence in addition to the state (for example "traffic jam") is selected and these are output acoustically.

Die Übertragung erfolgt zweckmäßig per Funk, insbesondere Mobilfunk. Besonders geeignet ist dabei eine Kurznachrichtenübertragung. In digitalen Mobilfunknetzes ist eine Rundspruch-Übertragung (Cellbroadcast) möglich.The transmission is expediently carried out by radio, in particular mobile radio. Especially Short message transmission is suitable. In digital cellular network is broadcasting (cell broadcast) possible.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Dabei zeigt:

Fig. 1
einen Ausschnitt eines Straßenverkehrsnetzes mit in jeweils mehrere Segmente unterteilten Straßen,
Fig. 2
eine Segmenttabelle im Endgerät und der Informationszentrale,
Fig. 3
wesentliche Elemente der Zentrale, des Endgerätes sowie die Übertragung als Blockschaltbild.
Further features and advantages of the invention result from the subclaims and the following description of an exemplary embodiment with reference to the drawing. It shows:
Fig. 1
a section of a road network with streets divided into several segments,
Fig. 2
a segment table in the terminal and the information center,
Fig. 3
essential elements of the control center, the terminal and the transmission as a block diagram.

Figur 1 zeigt einen Ausschnitt eines Straßenverkehrsnetzes mit einer von links nach rechts verlaufenden Straße, bestehend aus den Segmenten 1 bis 4 (wobei hier jeweils die Nummer eines Segmentes auch identisch als dessen Bezugszeichen verwendet wird), einer von unten nach oben verlaufenden Straße mit den Segmenten 5, 6, 7, 8 und einer sich an der Kreuzung der aus den Segmenten 1 bis 4 gebildeten Straße mit der aus den Segmenten 5 bis 8 gebildeten Straße abzweigenden weiteren Straße mit den Segmenten 9, 10 usw. sowie eine von unten nach oben verlaufende Straße mit den Segmenten 11, 12.Figure 1 shows a section of a road network with one from the left to right-hand road, consisting of segments 1 to 4 (whereby here the number of a segment is also identical as its reference number is used), a bottom-up street with the segments 5, 6, 7, 8 and one formed at the intersection of segments 1 to 4 Street with the further street branching off from segments 5 to 8 Street with segments 9, 10 etc. as well as one from bottom to top Street with segments 11, 12.

Um Verkehrsinformationen betreffend Segmente von Straßen des ausschnittsweise dargestellten Verkehrsnetzes möglichst effizient von einer Verkehrsinformationszentrale an ein Endgerät übertragen zu können, werden die Verkehrsinformationen in der Zentrale erfindungsgemäß mit einer Tabelle kodiert und mit einer identischen Tabelle im Endgerät für die Darstellung für den Benutzer (beispielsweise optisch in einer zweidimensionalen digitalen Karte des Straßenverkehrsnetzes oder akustisch) umkodiert. Wenn beispielsweise in den Segmenten 1, 2, 3 der von links nach rechts in Figur 1 verlaufenden Straße eine niedrige Durchschnittsgeschwindigkeit vorliegt, kann jeweils eine Segmentidentifikation eines der drei Segmente und hierzu eine den Zustand des Segmentes repräsentierende Zustandskodierung übertragen werden, wie dies bei RDS-TMC üblich ist. Erfindungsgemäß wird in diesem Falle die Identifikation des Segmentes 1 (beispielsweise "1"), die Zahl der von der übertragenen Verkehrsinformation bezeichneten Segmente 1 bis 3, also eine "3" und entweder ein Zustand aller hier übertragenen Segmente (1 bis 3) oder in der Reihenfolge der Segmente (1 bis 3) jeweils der Zustand eines Segmentes. Hierzu ist es erforderlich, daß für die Zentrale und das Endgerät identisch die Numerierungsreihenfolge der Segmente festliegt. Wie Figur 1 verdeutlicht, ist dies entlang der von links nach rechts verlaufenden Straße mit aufsteigender Numerierung möglich. Problematisch wird es jedoch an Kreuzungen, insbesondere Gabelungen, wie in Figur 1 links.To get traffic information regarding segments of streets of the excerpt presented traffic network as efficiently as possible from a traffic information center To be able to transmit to a terminal, the traffic information in the control center according to the invention coded with a table and with an identical one Table in the terminal for presentation to the user (for example optically in a two-dimensional digital map of the road network or acoustically) recoded. If, for example, in segments 1, 2, 3 the left to right there is a low average speed in the road running in FIG. 1, can one segment identification of one of the three segments and one for this State coding representing the state of the segment are transmitted, as is usual with RDS-TMC. According to the invention in this case Identification of segment 1 (for example "1"), the number of the Transmitted traffic information designated segments 1 to 3, ie a "3" and either a state of all segments transmitted here (1 to 3) or in the Sequence of the segments (1 to 3) each the state of a segment. This is it is necessary for the control center and the terminal to be identical Numbering order of the segments is fixed. As Figure 1 illustrates, this is along the street from left to right with increasing numbers possible. However, it becomes problematic at intersections, especially forks, as in Figure 1 left.

Deshalb werden im Endgerät (und zweckmäßig identisch in der Verkehrszentrale) Tabellen gemäß Figur 2 und/oder 3 zur Dekodierung verwendet.Therefore, in the terminal (and expediently identical in the traffic control center) Tables according to Figure 2 and / or 3 used for decoding.

in Figur 2 ist zu einem Segment zur Repräsentation der Reihenfolge jeweils ein Pointer auf das als in Fahrtrichtung nächste Segment zu betrachtende Folge-Segment angegeben, nämlich zum Segment 1 das Segment 2, zum Segment 2 das Segment 3, zum Segment das Segment 4 usw. Zusätzlich zur die Reihenfolge der Segmente repräsentierenden Pointer-Angabe ist hier auch eine eine Ausgabe an einen Endgerätbenutzer repräsentierende Angabe, wie "A8 - Stuttgart" usw. dargestellt, welche mit Verkehrsinformationen zu diesem Segment ausgegeben werden kann. Die angegebenen Textinformationen sind insbesondere für eine akustische Ausgabe geeignet. Für eine Ausgabe auf einer digitalen Karte ist ein Bezug zur digitalen Karte (wie z.B. Koordinaten) vorzusehen. Wenn beispielsweise im Endgerät der Verkehrsinformationszentrale zur Segmentkette Segment 1, 2, 3 eine Zustandsinformation (Stau) übermittelt wird, wird das Segment 1, die Zahl 3 und die Zustandsinformation "0", welche mit einer Zustandstabelle dekodiert wird , als "Stau" übermittelt.in FIG. 2 there is a segment to represent the sequence Pointer to the next segment to be regarded as the next segment in the direction of travel specified, namely segment 1, segment 2, segment 2, Segment 3, segment 4, etc. In addition to the order of Pointer information representing segments is also an output here an indication representing a terminal user, such as "A8 - Stuttgart" etc. shown, which is output with traffic information for this segment can be. The text information provided is particularly for one acoustic output suitable. For an issue on a digital card is a To provide a reference to the digital map (such as coordinates). For example, if in Terminal of the traffic information center for segment chain segment 1, 2, 3 one Status information (traffic jam) is transmitted, the segment 1, the number 3 and the Status information "0", which is decoded with a status table, as "traffic jam" transmitted.

Figur 3 stellt als Blockschaltbild die Elemente der Zentrale und des Endgerätes sowie die Übertragung von Informationen von der Zentrale zum Endgerät dar. Die Verkehrsinformationszentrale 20 erhält oder generiert zu übertragende Verkehrsinformationen, die im Speicher 21 gespeichert sind. Die Verkehrsinformationen können insbesondere auf Informationen von stationären Detektoren entlang Straßen des Verkehrsnetzes, auf mobilen Detektoren in Fahrzeugen im Verkehrsnetz sowie auf anderen Quellen basieren.Figure 3 shows a block diagram of the elements of the center and the terminal and represents the transmission of information from the control center to the terminal Traffic information center 20 receives or generates traffic information to be transmitted, which are stored in the memory 21. The traffic information can particularly rely on information from stationary detectors along roads of the traffic network, on mobile detectors in vehicles in the traffic network as well based on other sources.

Zu übertragende Verkehrsinformationen 21 werden in der Verkehrsinformationspaket-Generationseinrichtung 22 erfindungsgemäß kodiert. Hierzu wird eine Segmenttabelle 23 (beispielsweise gemäß Figur 2) verwendet. Die zu übertragenden Verkehrsinformationen 21, betreffend Stau im Segment 1, Stau im Segment 2 und Stau im Segment 3, werden somit beispielsweise kodiert als "1, 3, 0, Ende" (wobei 1 Segment 1 bedeutet, 3 drei Segmente bedeutet und 0 Durchschnittsgeschwindigkeit 0 entsprechend Stau bedeutet und "Ende" ein Ende-Flag ist). Das Ende-Flag wird hier nur zur Illustration verwendet. Dem Fachman sind zur eindeutigen Kennzeichnung des Meldungsendes auch andere protokolltechnische Varianten bekannt. Diese kodierten Informationen werden der Übertragungseinrichtung 33 zum Senden übermittelt. Die Sendeeinrichtung 33 kann beispielsweise eine Mobilfunk-Sendeeinrichtung oder ein Zugang zu einer Mobilfunk-Sendeeinrichtung sein. Nach der Übertragung per Funk, insbesondere Mobilfunk, werden diese im Endgerät 24 vom Empfänger 25 empfangen und von einer Dekodiereinrichtung 26 dekodiert. Hierzu verwendet die Dekodiereinrichtung eine Segmenttabelle 27 (welche der Segmenttabelle 23 entspricht). Die dekodierten Verkehrsinformationen können dem Benutzer dargestellt werden. Sie können auch gespeichert (36) werden. Verkehrsinformationen können insbesondere auch zur Berechnung einer optimierten Route im Endgerät 24 verwendet werden, indem optimale Reisezeiten oder möglichst wenige Staus etc. angestrebt werden.Traffic information 21 to be transmitted is stored in the traffic information package generation device 22 coded according to the invention. For this, a segment table 23 (for example according to Figure 2) used. The ones to be transferred Traffic information 21, relating to traffic jams in segment 1, traffic jams in segment 2 and Traffic jams in segment 3 are thus coded as "1, 3, 0, end" (where 1 Segment 1 means 3 means 3 segments and 0 means average speed 0 means congestion and "end" is an end flag). The end flag is here used for illustration only. The specialist are for clear identification other protocol-related variants are known at the end of the message. This encoded information is used by the transmission device 33 for transmission transmitted. The transmission device 33 can, for example, be a mobile radio transmission device or an access to a mobile radio transmission device. To the transmission by radio, in particular mobile radio, these are in the terminal 24 received by the receiver 25 and decoded by a decoder 26. For this purpose, the decoder uses a segment table 27 (which of the Corresponds to segment table 23). The decoded traffic information can the Users. They can also be saved (36). Traffic information can in particular also be used to calculate an optimized Route in the terminal 24 can be used by optimal travel times or if possible few traffic jams etc. are aimed for.

Anstatt einer Zustandsangabe ("0") für alle Segmente (1, 2, 3) einer Segmentkette kann auch für jedes Segment (1, 2, 3) der bezeichneten ("1 3") Segmentkette einzeln dessen Zustand ("0 0 0") angegeben werden. Die Unterscheidung kann vom Endgerät durch ein am Anfang übertragenes Flag getroffen werden oder durch Vergleich der Zahl (hier einmal/oder dreimal "0") der Zustandsangaben vor einem (binären) "Ende"-Flag mit der übermittelten Kettensegmentzahl-Angabe "3". Die Erfindung kann in der Zentrale und im Endgerät als Programm realisiert werden, ist jedoch nicht hierauf beschränkt und kann auch als elektronische Schaltung ausgebildet werden.Instead of a status information ("0") for all segments (1, 2, 3) of a segment chain can also individually for each segment (1, 2, 3) of the designated ("1 3") segment chain whose state ("0 0 0") are specified. The distinction can be made from Be hit by a flag transmitted at the beginning or by Comparison of the number (here once / or three times "0") of the state information before one (Binary) "end" flag with the transmitted chain segment number "3". The invention can be implemented as a program in the control center and in the terminal, However, it is not limited to this and can also be used as an electronic circuit be formed.

Claims (20)

  1. Method for the transmission of traffic information relating to a road traffic network, from a traffic information control centre (20) to at least one terminal (24),
    such that a digital map of the traffic network is provided at the traffic information control centre and at the terminal, with section of streets or roads or groups of roads represented in each case as a segment in the said digital map,
    and in which transmitted traffic information, as for example "1, 3, 0, end", represents at least the situation, as for example "0"; "traffic jam", prevailing in at least one segment (1 to 12) of the traffic network and specifies the identity of that segment or those segments,
    such that the traffic information (21) to be transmitted from the control centre (20) is assembled therein in such manner that the traffic information, as for example average speed "0", to be transmitted concerning the situation in traffic segments that are part of a chain of traffic network segments (1 - 2 - 3) numbered sequentially in the traffic network, is assembled into a traffic information packet, as for example "1, 3, 0, end", in which packet the segments and their situation are indicated by the following:
    the identity ("1") of a traffic segment ("1") at one end ("1"; "3") of the chain (1 - 2 - 3) of traffic segments;
    a segment chain number indication ("3") representing the total number of segments (1 - 2 - 3) in the said chain, and
    at least one situation code, as for example "0"; "traffic jam"; "0 0 0", indicating the situation in at least one of the said segments.
  2. Method according to Claim 1,
    characterised in that
    a situation code, as for example "0"; "traffic jam", is contained in a traffic information block (24) which indicates the situation in all the segments (1 - 2 - 3 comprised in the chain.
  3. Method according to Claim 1,
    characterised in that
    for each traffic network segment (1, 2, 3) a respective situation code, as for example "0 0 0", is indicated for the said segment in the sequence of the traffic segments in the chain.
  4. Method according to any of the preceding claims,
    characterised in that
    a defined end-of-message sign is transmitted after the last situation code transmitted in a traffic information packet.
  5. Method according to any of the preceding claims,
    characterised in that
    during the decoding at the terminal, besides the first or last segment ("1") specified, a number of additional segments corresponding to the chained segment number indication transmitted, in increasing segment numeration sequence in a table at the terminal, are regarded as designated in relation to the situation information.
  6. Method according to any of the preceding claims,
    characterised in that
    a traffic information packet contains a code that indicates whether only one situation code is being transmitted for all the segments, or whether there is one situation code for each respective segment.
  7. Method according to any of the preceding claims,
    characterised in that
    a chained segment number indication is transmitted with a sign, such that when the sign is negative the segments designated are those before the identified segment in the segment numeration sequence, and when the sign is positive the segments designated are those after the identified segment in the segment numeration sequence.
  8. Method according to any of the preceding claims,
    characterised in that
    at the traffic information control centre a sequence indicator is defined for all traffic information packets that concern the same segments, which is in each case transmitted in the packets.
  9. Method according to any of Claims 1 to 8,
    characterised in that
    in a table for the digital map at the terminal and at the control centre, it is indicated for each segment (1) by at least one pointer (2) which segment or segments in the traffic network are located in a given travelling direction ahead of, or ahead of and behind the said segment.
  10. Method according to Claim 9,
    characterised in that
    for each segment, the segment before and the segment after the said segment are stored
  11. Method according to either of Claims 9 or 10,
    characterised in that
    the segment table according to Claim 9 is a constituent of a digital map stored at the terminal and at the control centre.
  12. Method according to any of the preceding claims,
    characterised in that
    a situation code to be transmitted is the travelling speed or travel time, or the deviation of the travelling speed or travel time from an expected value, or a value derived therefrom.
  13. Method according to any of the preceding claims,
    characterised in that
    a situation code relates to the weather, roadworks, etc. in a segment.
  14. Method according to any of the preceding claims,
    characterised in that
    a situation code is discretely quantised.
  15. Method according to Claim 14,
    characterised in that
    a situation code is quantised into at most 10 and in particular at most 5 steps.
  16. Method according to any of the preceding claims,
    characterised in that
    transmission takes place by radio, in particular by RDS.
  17. Method according to any of Claims 1 to 15,
    characterised in that
    transmission takes place by mobile radio, in particular by a mobile radio cell broadcast technique as for example GSM-SMS-CB.
  18. Traffic information control centre, in particular for implementing the method according to any of the preceding claims,
    comprising a transmitting device (23) or means of access thereto for the transmission of traffic information (34) to at least one terminal (24),
    having a memory (23) that contains a digital map of the segments of a traffic network,
    with a device (22) to generate traffic information packets for the production of traffic information (34) to be transmitted, the said device (22) being designed such that the traffic information (34) it generates for transmission (33) comprises the following:
    the identity of a segment (1) located at one end of a chain (1, 2, 3) of segments numbered sequentially (1, 2, 3),
    a chained segment number indication (3) representing the total number of segments in the said chain (1, 2, 3), and
    at least one additional code ("traffic jam") relating to the situation in at least one of the said segments.
  19. Terminal, in particular for implementing the method according to any of Claims 1 to 17,
    having a receiver (25) to receive traffic information packets (34) transmitted from a traffic information control centre (20),
    comprising an output device (36) for the visual and/or acoustic output of traffic information or route information to a terminal user,
    with a decoding device (26) for decoding the traffic information packet (34) received for output (36) or for preparing the route information to be issued, the said device (26) being designed such that the traffic information packets received, comprising the identity of a segment at one end of a chain of traffic segments, a chained segment number indicator representing the number of segments in the chain, and a situation code concerning the situation in at least one segment, are decoded into a form that can be displayed to the terminal user or a form suitable for the representation of navigation information.
  20. Terminal according to Claim 19,
    characterised in that
    the receiver is a mobile radio unit or a connection for a mobile radio unit.
EP99964397A 1998-12-14 1999-11-29 Method for transmitting traffic information Revoked EP1141909B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19859522 1998-12-14
DE19859522 1998-12-14
DE19941648 1999-08-27
DE19941648A DE19941648C2 (en) 1998-12-14 1999-08-27 Method for transmitting traffic information relating to a road traffic network from a traffic information center to at least one terminal, and traffic information center and terminal for carrying out the method
PCT/DE1999/003879 WO2000039773A1 (en) 1998-12-14 1999-11-29 Method for transmitting traffic information

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EP1141909A1 EP1141909A1 (en) 2001-10-10
EP1141909B1 true EP1141909B1 (en) 2002-09-04

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EP (1) EP1141909B1 (en)
AT (1) ATE223608T1 (en)
WO (1) WO2000039773A1 (en)

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US6633808B1 (en) 2003-10-14
ATE223608T1 (en) 2002-09-15
EP1141909A1 (en) 2001-10-10
WO2000039773A1 (en) 2000-07-06

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