EP1023713B1 - Method and consideration of supplementary traffic information in a navigation device which is installed in a vehicle - Google Patents

Method and consideration of supplementary traffic information in a navigation device which is installed in a vehicle Download PDF

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Publication number
EP1023713B1
EP1023713B1 EP98962173A EP98962173A EP1023713B1 EP 1023713 B1 EP1023713 B1 EP 1023713B1 EP 98962173 A EP98962173 A EP 98962173A EP 98962173 A EP98962173 A EP 98962173A EP 1023713 B1 EP1023713 B1 EP 1023713B1
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Prior art keywords
route
vehicle
coding
sections
transmitted
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EP98962173A
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German (de)
French (fr)
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EP1023713A2 (en
Inventor
Bernd Hessing
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096805Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
    • G08G1/096811Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed offboard
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096805Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
    • G08G1/096811Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed offboard
    • G08G1/096816Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed offboard where the complete route is transmitted to the vehicle at once

Definitions

  • the invention relates to a method for taking additional Traffic information for the function of a one internal digital road map containing vehicle-fixed Guidance device of a motor vehicle by handover from the starting point and destination to a central computer and Transfer one in the central computer taking into account the supplementary traffic information created route planning on the vehicle-fixed route guidance device of the motor vehicle.
  • Vehicle-fixed route guidance devices are known and have been since at least in use in luxury vehicles for a few years.
  • the route guidance devices contain a navigation system, the current position of the motor vehicle to be able to determine. This is generally a satellite navigation with the evaluation of vehicle sensors combined. They also contain route guidance devices at least one digital road map, for example as a CD-Rom is part of the route guidance system.
  • the vehicle-mounted route guidance devices work autonomously, however, are unable to get current traffic information to consider.
  • a location coding is used with which all traffic-relevant nodes of a country can be specified that are listed in a "location table".
  • the protocol contains a coding of the direction and the extent, so the traffic disruption to define the area described.
  • the traffic information are transmitted in the RDS system in addition to a radio broadcast and can be sent as a TMC signal (Traffic message channel) stored, decoded and output in a suitable form become.
  • TMC signal Traffic message channel
  • the digital maps used in the route guidance system provided with the details of the "location table” to determine to be able to determine whether the route calculated in individual cases is affected by current traffic information.
  • the automatic utilization of the traffic information in the vehicle-fixed Route guidance system is because of that considerable effort is only possible to a limited extent. The system allows does not take traffic forecasts into account and can only do that events for route planning restricted to the TMC locations consider.
  • Such a system is e.g. known from EP-A-564 353.
  • the present invention is therefore based on the problem off, the transmission of a centrally calculated route planning to simplify a vehicle-fixed route guidance device and enable it within shorter transmission times.
  • the internal digital road map of the route guidance device is provided with information for a location code that the Transfer of route planning by specifying by Location coding defined route sections takes place between The starting point and destination are and that the transferred Route sections in the internal digital road map the route guidance device are modified so that preferred over other, non-transmitted route sections at the then in the vehicle-fixed route guidance device performed route search are taken into account.
  • the transmission takes place in the central computer certain optimized route by transmitting route sections, which are encoded with a location code into the vehicle-mounted route guidance device can be loaded.
  • the vehicle-fixed route guidance device Contains information about the location code used, by already providing the internal digital road map with details the location coding used is provided.
  • the transferred Route sections are, if necessary after an implementation of the transmitted Location codes in the internal digital map location codes used by tables or algorithms to Modification of the internal digital road map used by assigning them as high priority route sections for the function of the vehicle-fixed route guidance device is used become.
  • the high priority can be achieved, for example, by the Allocation of a very high possible average speed to be marked.
  • the transmitted route sections can, but do not have to connect seamlessly.
  • any Gaps between the route sections are fixed by the vehicle Route guidance facility completed.
  • the vehicle-fixed route guidance device the way from the starting point to the entry point of the route section to be traveled first determine and appropriate guidance output. The same applies when leaving the last given Section of the route for reaching the specific destination. Accordingly, the vehicle-mounted route guidance device any gaps between the transmitted route sections fill up and your own, independent of the central computer Carry out navigation at the starting point and for the destination, if the starting point and / or destination are not coincidental match a location contained in the location table.
  • TMC encoded traffic disturbances When TMC encoded traffic disturbances are received, the stored preferred route to be checked. In case of a traffic disruption lies on a preferred route section the modification of the affected route section changed that preference is lifted and the traffic disruption is taken into account. There may then be a local cancellation, without the rest of the preferred route in the vehicle-fixed Route guidance device would be lost and from the headquarters (chargeable) would have to be recalculated.
  • the coding of the route sections is put together from a coding for a specific position a certain street, a coding for the direction the road and a coding of the extent of the route section in the street.
  • This structure corresponds to the coding the traffic information encoded for RDS transmission provided location coding.
  • Figure 1 shows functional blocks of a vehicle-fixed route guidance device 1, into which an input device 2 a destination can be entered. Calculated for the destination entered a route computer 3 with the help of a self-location current position and with the help of an associated with it digital map a route with driving recommendations on a Output device 4 is communicated to the driver.
  • a TMC block 5 shows that the in the route computer used digital map with a TMC location table is provided, with the help of all important traffic nodes coded (16 bit) and clearly identified.
  • the destination and entered by the input device 2 if necessary, one also entered with the input device 2 Starting point or one from the self-location facility in the Route calculator 3 determined starting point are together with a request for an optimized route calculation a remote data transmission interface 6 passed.
  • About the Remote data transmission interface 6 communicates with the vehicle Route guidance device 1 with a remote data transmission interface 7 a control center 8, in which a central computer 9 based on the received request for the invoice a route between a given starting point and calculates a route for a destination entered.
  • current traffic information in a modification level 10 are stored to modify the in Central computer 9 used digital road map.
  • the powerful central computer 9 can do everything in this way relevant traffic information for the possible routes take into account, so that an adapted to the current traffic situation optimized route can be calculated.
  • the optimized route is from the central computer 9 on the Remote data transmission interfaces 7, 6 to the vehicle fixed Transfer guidance device 1. This happens according to the invention by transmission of route sections that between the starting point and the destination completely have to be driven through.
  • These route sections are according to the invention characterized by a location code for which preferably a TMC location table 11 is used which the TMC location table 5 of the vehicle-fixed route guidance device 1 corresponds.
  • the route sections are therefore preferred by a location coding from the location table 11 (16 bit) a direction for the direction of travel on the Road (1 bit) and the extent of the area on the road (3 bit) defined. If the area to be traveled is larger be than to be transmitted through the three expansion bits the area is divided and as several route sections transfer.
  • a start 21 of the vehicle-fixed route guidance device gives an entry 22 for a destination free.
  • a handover step 23 the entered destination and the self-located Position of the motor vehicle on the remote data transmission interface 6 passed. After that the vehicle remains fixed Route guidance device 1 in a waiting state up to a receiving step 24.
  • a start step 41 for the control center 8 puts it into one Waiting state for a request 23 from a vehicle fixed Route guidance device 1, which in a reception step 42 received by the remote data transmission interface 7 becomes.
  • About mathematical traffic models 43, the current Taking traffic information into account is an optimally individual Route 44 calculated.
  • This route is in one coding step 45 divided into route sections and with a TMC location coding characterized.
  • the coded route sections are transmitted in a transmission step 46 by remote data transmission transmitted and in the vehicle-fixed route guidance device 1 received with the receiving step 24.
  • the function of the Control center 8 is completed after transmission step 46, so that for this request the end 47 of the function of the center is reached.
  • the internal digital map of the route computer 3 modified in step 25.
  • the route sections transmitted from the control center 8 are modified in the internal digital map so that in the subsequent independent route calculation 26 are preferably used by the route computer 3.
  • the result is a route that first follows that of the Central also contains 8 planned route sections, by means of a corresponding arrival and destination navigation as well through navigation to close any connection gaps supplemented by the vehicle-fixed route guidance device become.
  • a subsequent checking step 29 it is checked whether whether there is a major deviation from the predicted route a recalculation of the route based on the current one Location of the vehicle.
  • a recalculation can also be caused by temporal influences (breaks, expiry a specified time span, planned travel time exceeded) become necessary. If this is the case, the functional sequence the moment after entering destination 22 deferred and a new route calculation using the Central 8 requested. If no recalculation 29 is required, is checked in test step 30 whether the destination has been reached is. If this is not the case, steps 27 to 29 repeatedly until the destination is reached. Is this Destination reached, in step 31, the current one Modification of the internal digital travel order Road map (step 25) canceled so that the original state the vehicle-fixed route guidance device 1 restored is. Then the function of the vehicle-fixed route guidance device 1 completed for this job so that the functional sequence is set to "end" 32.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Navigation (AREA)
  • Traffic Control Systems (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Berücksichtigung ergänzender Verkehrsinformationen für die Funktion einer eine interne digitale Straßenkarte enthaltenden fahrzeugfesten Zielführungseinrichtung eines Kraftfahrzeugs durch Übergabe von Ausgangspunkt und Fahrtziel an einen Zentralrechner und Übertragung einer im Zentralrechner unter Berücksichtigung der ergänzenden Verkehrsinformationen erstellten Routenplanung auf die fahrzeugfeste Zielführungseinrichtung des Kraftfahrzeugs.The invention relates to a method for taking additional Traffic information for the function of a one internal digital road map containing vehicle-fixed Guidance device of a motor vehicle by handover from the starting point and destination to a central computer and Transfer one in the central computer taking into account the supplementary traffic information created route planning on the vehicle-fixed route guidance device of the motor vehicle.

Fahrzeugfeste Zielführungseinrichtungen sind bekannt und seit einigen Jahren jedenfalls in Fahrzeugen der Oberklasse in Benutzung. Die Zielführungseinrichtungen enthalten ein Navigationssystem, um die jeweilige momentane Position des Kraftfahrzeugs feststellen zu können. Hierzu wird im allgemeinen eine Satellitennavigation mit der Auswertung von Fahrzeugsensoren kombiniert. Weiterhin enthalten Zielführungseinrichtungen wenigstens eine digitale Straßenkarte, die beispielsweise als CD-Rom Bestandteil der Zielführungseinrichtung ist. Die fahrzeugfesten Zielführungseinrichtungen arbeiten autonom, sind jedoch nicht in der Lage, aktuelle Verkehrsinformationen zu berücksichtigen. Vehicle-fixed route guidance devices are known and have been since at least in use in luxury vehicles for a few years. The route guidance devices contain a navigation system, the current position of the motor vehicle to be able to determine. This is generally a satellite navigation with the evaluation of vehicle sensors combined. They also contain route guidance devices at least one digital road map, for example as a CD-Rom is part of the route guidance system. The vehicle-mounted route guidance devices work autonomously, however, are unable to get current traffic information to consider.

Durch die europäische Vornorm ENV12313-1 ist es bekannt, Verkehrsinformationen in einem standardisierten Protokoll zu übertragen. Dabei wird eine Ortscodierung verwendet, mit der alle verkehrsrelevanten Knoten eines Landes angebbar sind, die in einer "Location-Tabelle" aufgeführt sind. Neben der Codierung des Ortes enthält das Protokoll eine Codierung der Richtung und der Ausdehnung, um so das durch die Verkehrsstörung beschriebene Gebiet zu definieren. Die Verkehrsinformationen werden im RDS-System neben einer Rundfunksendung übertragen und können im Empfängergerät als TMC-Signal (Traffic message channel) abgespeichert, decodiert und in geeigneter Form ausgegeben werden. Für eine etwaige Berücksichtigung der Verkehrsinformationen durch die Zielführungseinrichtung werden die in der Zielführungseinrichtung verwendeten digitalen Karten mit den Angaben der "Location-Tabelle" versehen, um feststellen zu können, ob die im Einzelfall vorherberechnete Route von einer aktuellen Verkehrsinformation betroffen ist. Die automatische Verwertung der Verkehrsinformation in dem fahrzeugfesten Zielführungssystem ist wegen des damit verbundenen erheblichen Aufwandes nur begrenzt möglich. Das System erlaubt keine Berücksichtigung von Verkehrsprognosen und kann nur die auf die TMC Locations beschränkten Ereignisse zur Routenplanung berücksichtigen.Due to the European standard ENV12313-1 it is known traffic information in a standardized protocol transfer. A location coding is used with which all traffic-relevant nodes of a country can be specified that are listed in a "location table". In addition to the coding of the location, the protocol contains a coding of the direction and the extent, so the traffic disruption to define the area described. The traffic information are transmitted in the RDS system in addition to a radio broadcast and can be sent as a TMC signal (Traffic message channel) stored, decoded and output in a suitable form become. For any consideration of traffic information through the route guidance system the digital maps used in the route guidance system provided with the details of the "location table" to determine to be able to determine whether the route calculated in individual cases is affected by current traffic information. The automatic utilization of the traffic information in the vehicle-fixed Route guidance system is because of that considerable effort is only possible to a limited extent. The system allows does not take traffic forecasts into account and can only do that events for route planning restricted to the TMC locations consider.

Ein solches System ist z.B. aus der EP-A-564 353 bekannt.Such a system is e.g. known from EP-A-564 353.

Es wird daher versucht, eine die aktuellen Verkehrsinformationen berücksichtigende Routenberechnung durch einen Zentralrechner durchführen zu lassen und die Routenberechnung als Service, beispielsweise in einem Mobilfunksystem, anzubieten. Hierzu muß das fahrzeugfeste Zielführungssystem mit einer Einrichtung zur Datenfernübertragung versehen sein. Für die Interpretierbarkeit der zentral errechneten optimierten Route im Fahrzeug selbst muß in der Zentrale eine eindeutig verständliche digitale Karte verwendet werden. Bei einem von Mercedes-Benz in Tokyo eingesetzten derartigen Verfahren erfolgt die Übertragung der Route durch eine Aneinanderreihung der zu befahrenden Teilstücke der Route. Die Identifizierung der Teilstücke der Route werden dabei mit einer nur in Tokio anwendbaren Codierung übertragen. Nachteilig ist dabei insbesondere, daß bei komplexen Routen die benötigte Übertragungskapazität etwa linear mit der Länge der Route ansteigt. Die Übertragungskapazität erfordert den Einsatz von teuren Punkt-Zupunkt-Datenverbindungen, wobei die Übertragung einer Route für eine Stadtfahrt in Tokyo Übertragungszeiten von mindestens 45 s benötigt. Eine Datenübertragung über diese Zeitspanne ist im Fahrbetrieb nicht sicher zu gewährleisten.An attempt is therefore made to obtain the current traffic information taking into account route calculation by a central computer to be carried out and the route calculation as To offer service, for example in a mobile radio system. For this purpose, the vehicle-fixed route guidance system with a device be provided for remote data transmission. For interpretability the centrally calculated optimized route in The vehicle itself must be clearly understandable at the headquarters digital card can be used. At one of Mercedes-Benz Such methods used in Tokyo Transfer of the route by lining up the route to be traveled Parts of the route. Identification of the sections The route will only be used in Tokyo Transfer coding. A particular disadvantage is that the transmission capacity required for complex routes increases approximately linearly with the length of the route. The transmission capacity requires the use of expensive point-to-point data connections, being the transmission of a route for a city trip in Tokyo transfer times of at least 45 s required. There is data transmission over this period to ensure safe driving.

Die vorliegende Erfindung geht somit von der Problemstellung aus, die Übertragung einer zentral errechneten Routenplanung auf eine fahrzeugfeste Zielführungseinrichtung zu vereinfachen und innerhalb kürzerer Übertragungszeiten zu ermöglichen.The present invention is therefore based on the problem off, the transmission of a centrally calculated route planning to simplify a vehicle-fixed route guidance device and enable it within shorter transmission times.

Ausgehend von dieser Problemstellung ist ein Verfahren der eingangs erwähnten Art erfindungsgemäß dadurch gekennzeichnet, daß die interne digitale Straßenkarte der Zielführungseinrichtung mit Angaben für eine Ortscodierung versehen ist, daß die Übertragung der Routenplanung durch die Angabe von durch die Ortscodierung definierten Routenabschnitten erfolgt, die zwischen Ausgangspunkt und Fahrtziel liegen und daß die übertragenen Routenabschnitte in der internen digitalen Straßenkarte der Zielführungseinrichtung so modifiziert werden, daß sie gegenüber anderen, nicht übertragenen Routenabschnitten bevorzugt bei der anschließend in der fahrzeugfesten Zielführungseinrichtung durchgeführten Routensuche berücksichtigt werden.Proceeding from this problem is a procedure of characterized at the outset characterized according to the invention, that the internal digital road map of the route guidance device is provided with information for a location code that the Transfer of route planning by specifying by Location coding defined route sections takes place between The starting point and destination are and that the transferred Route sections in the internal digital road map the route guidance device are modified so that preferred over other, non-transmitted route sections at the then in the vehicle-fixed route guidance device performed route search are taken into account.

Erfindungsgemäß erfolgt die Übertragung der im Zentralrechner bestimmten optimierten Route durch die Übertragung von Routenabschnitten, die in mit einem Ortscode codierter Form in die fahrzeugfeste Zielführungseinrichtung geladen werden. Voraussetzung hierfür ist, daß die fahrzeugfeste Zielführungseinrichtung Informationen über den verwendeten Ortscode enthält, indem die interne digitale Straßenkarte bereits mit Angaben der verwendeten Ortscodierung versehen ist. Die übertragenen Routenabschnitte werden, ggf. nach einer Umsetzung der übertragenen Orts-Codes in die in der internen digitalen Karte verwendeten Orts-Codes durch Tabellen oder Algorithmen, zur Modifizierung der internen digitalen Straßenkarte verwendet, indem diese als Routenabschnitte mit einer hohen Priorität für die Funktion der fahrzeugfesten Zielführungseinrichtung genutzt werden. Die hohe Priorität kann beispielsweise durch die Zuordnung einer sehr hohen möglichen Durchschnittsgeschwindigkeit gekennzeichnet sein. Die übertragenen Routenabschnitte können, müssen aber nicht nahtlos aneinander anschließen. Sie müssen lediglich die Gesamtroute eindeutig festlegen. Etwaige Lücken zwischen den Routenabschnitten werden durch die fahrzeugfeste Zielführungseinrichtung ausgefüllt. Ebenso müß die fahrzeugfeste Zielführungseinrichtung den Weg vom Ausgangspunkt zum Eintrittspunkt des als erstes zu durchfahrenen Routenabschnitts bestimmen und entsprechende Führungshinweise ausgeben. Ähnliches gilt beim Verlassen des letzten vorgegebenen Routenabschnitts für die Erreichung des konkreten Fahrtziels. Demzufolge muß die fahrzeugfeste Zielführungseinrichtung etwaige Lücken zwischen den übertragenen Routenabschnitten auffüllen und eine eigene, vom Zentralrechner unabhängige Navigation am Ausgangspunkt und für das Fahrtziel durchführen, falls Ausgangspunkt und/oder Fahrtziel nicht zufällig mit einem in der Location-Tabelle enthaltenen Ort übereinstimmen. Neben dem Vorteil, daß zur Funktion des erfindungsgemäßen Verfahrens die als optimal errechnete Route nicht vollständig übertragen werden muß, ergibt sich der Vorteil, daß nur die Straßenabschnitte, für die Verkehrsinformationen vorliegen über Tabellen (z.B. TMC-Location-Tabelle) zwischen der Zentrale und der fahrzeugfesten Zielführungseinrichtung vereinbart und synchronisiert sein müssen.According to the invention, the transmission takes place in the central computer certain optimized route by transmitting route sections, which are encoded with a location code into the vehicle-mounted route guidance device can be loaded. requirement this is that the vehicle-fixed route guidance device Contains information about the location code used, by already providing the internal digital road map with details the location coding used is provided. The transferred Route sections are, if necessary after an implementation of the transmitted Location codes in the internal digital map location codes used by tables or algorithms to Modification of the internal digital road map used by assigning them as high priority route sections for the function of the vehicle-fixed route guidance device is used become. The high priority can be achieved, for example, by the Allocation of a very high possible average speed to be marked. The transmitted route sections can, but do not have to connect seamlessly. she only have to clearly define the overall route. any Gaps between the route sections are fixed by the vehicle Route guidance facility completed. Likewise, the vehicle-fixed route guidance device the way from the starting point to the entry point of the route section to be traveled first determine and appropriate guidance output. The same applies when leaving the last given Section of the route for reaching the specific destination. Accordingly, the vehicle-mounted route guidance device any gaps between the transmitted route sections fill up and your own, independent of the central computer Carry out navigation at the starting point and for the destination, if the starting point and / or destination are not coincidental match a location contained in the location table. In addition to the advantage that the function of the method according to the invention the route calculated as optimal is not complete must be transferred, there is the advantage that only the Road sections for which traffic information is available via tables (e.g. TMC location table) between the headquarters and the vehicle-fixed route guidance device agreed and have to be synchronized.

Beim Empfang von TMC codierten Verkehrsstörungen kann die gespeicherte bevorzugte Route überprüft werden. Falls eine Verkehrsstörung auf einem bevorzugten Routenabschnitt liegt, kann die Modifikation des betroffenen Routenabschnitts so geändert werden, daß die Bevorzugung aufgehoben und die Verkehrsstörung berücksichtigt wird. Es erfolgt dann ggfs. eine lokale Aufhebung, ohne daß der Rest der bevorzugten Route in der fahrzeugfesten Zielführungseinrichtung verloren ginge und von der Zentrale (kostenpflichtig) neu errechnet werden müßte.When TMC encoded traffic disturbances are received, the stored preferred route to be checked. In case of a traffic disruption lies on a preferred route section the modification of the affected route section changed that preference is lifted and the traffic disruption is taken into account. There may then be a local cancellation, without the rest of the preferred route in the vehicle-fixed Route guidance device would be lost and from the headquarters (chargeable) would have to be recalculated.

In einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens wird die Codierung der Routenabschnitte zusammengesetzt aus einer Codierung für eine bestimmte Position auf einer bestimmten Straße, einer Codierung für die Richtung auf der Straße und einer Codierung der Ausdehnung des Routenabschnitts auf der Straße. Diese Struktur der Codierung entspricht der für die RDS-Übertragung codierter Verkehrsinformationen vorgesehenen Ortscodierung. Es ist aber auch möglich, einen Routenabschnitt anders zu codieren, beispielsweise durch die Angabe einer Straße und der geografischen Koordinaten für den Eintrittspunkt und den Austrittspunkt eines übertragenen Routenabschnitts.In a preferred embodiment of the invention The coding of the route sections is put together from a coding for a specific position a certain street, a coding for the direction the road and a coding of the extent of the route section in the street. This structure corresponds to the coding the traffic information encoded for RDS transmission provided location coding. But it is also possible to code a route section differently, for example by the specification of a street and the geographic coordinates for the entry point and the exit point of a broadcast Route section.

Aufgrund der durch das erfindungsgemäße Verfahren erheblich reduzierten Datenmenge können die vom Zentralrechner bestimmten Routenabschnitte kostengünstig in einem System für Kurznachrichten übertragen werden, beispielsweise als SMS-(Short Message System) Signale. Der Aufbau teurer Punkt-Zu-Punkt-Verbindungen ist daher nicht erforderlich. Bei der Übertragung der Routenabschnitte mit SMS-Signalen ist es unkritisch, wenn nicht alle zu übertragenden Routenabschnitte in einem einzigen SMS-Signal unterzubringen sind, da unproblematisch mehrere SMS-Signale für die Übertragung der Routenabschnitte benutzt werden können.Considerable due to the inventive method reduced data volume can be determined by the central computer Route sections inexpensively in a short message system transmitted, for example as SMS (Short Message System) signals. Establishing expensive point-to-point connections is therefore not necessary. When transferring of the route sections with SMS signals, it is not critical if not all route sections to be transmitted in one SMS signals are to be accommodated, since several are unproblematic SMS signals used for the transmission of the route sections can be.

Durch die Verwendung eines leistungsfähigen Zentralrechners ist es somit möglich, eine individuelle, unter Berücksichtigung aller vorliegenden aktuellen Verkehrsinformationen, einschließlich etwaiger für den Routenverlauf prognostizierten Verkehrsinformationen, optimierte Routenplanung zu erstellen. Diese wird erfindungsgemäß durch die Übertragung von Routenabschnitten in die fahrzeugfeste Zielführungseinrichtung geladen. Gegenüber der Angabe von unbedingt zu durchfahrenden Zielpunkten hat das Laden der Routenabschnitte des Vorteil, daß die fiktiven Zwischen-Zielpunkte nicht unbedingt angefahren werden müssen, da die fahrzeugfeste Zielführungseinrichtung auf etwaige Abweichungen flexibel unter Benutzung der durch die übertragenen Routenabschnitte des Zentralrechners modifizierten internen digitalen Straßenkarte reagieren kann.By using a powerful central computer it is therefore possible to consider an individual all current traffic information, including any predicted for the route Create traffic information, optimized route planning. According to the invention, this is achieved by the transmission of route sections loaded into the vehicle-mounted route guidance device. Compared to the specification of those to be driven through Target points have the advantage of loading the route sections, that the fictitious intermediate destination points are not necessarily approached have to be because the vehicle-fixed route guidance device flexible to any deviations using the through the transmitted route sections of the central computer modified internal digital road map can respond.

Die Erfindung soll im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:

Figur 1 -
schematische Funktionsblöcke für eine fahrzeugfeste Zielführungseinrichtung, die über eine Datenfernübertragung mit einem Zentralrechner zusammenwirkt
Figur 2 -
einen Funktionsablauf für die in Figur 1 dargestellte Anordnung.
The invention will be explained in more detail below with reference to an embodiment shown in the drawing. Show it:
Figure 1 -
schematic functional blocks for a vehicle-fixed route guidance device that interacts with a central computer via remote data transmission
Figure 2 -
a functional flow for the arrangement shown in Figure 1.

Figur 1 zeigt Funktionsblöcke einer fahrzeugfesten Zielführungseinrichtung 1, in die über eine Eingabevorrichtung 2 ein Fahrziel eingebbar ist. Für das eingegebene Fahrtziel errechnet ein Routenrechner 3 mit Hilfe einer Selbstortung der momentanen Position und mit Hilfe einer mit ihm verbundenen digitalen Karte eine Route, die mit Fahrempfehlungen an einer Ausgabeeinrichtung 4 dem Fahrer mitgeteilt wird.Figure 1 shows functional blocks of a vehicle-fixed route guidance device 1, into which an input device 2 a destination can be entered. Calculated for the destination entered a route computer 3 with the help of a self-location current position and with the help of an associated with it digital map a route with driving recommendations on a Output device 4 is communicated to the driver.

Durch einen TMC-Block 5 ist dargestellt, daß die in dem Routenrechner verwendete digitale Karte mit einer TMC-Ortstabelle versehen ist, mit deren Hilfe alle wichtigen Verkehrsknoten codiert (16 Bit) und eindeutig identifiziert sind.A TMC block 5 shows that the in the route computer used digital map with a TMC location table is provided, with the help of all important traffic nodes coded (16 bit) and clearly identified.

Das durch die Eingabeeinrichtung 2 eingegebene Fahrtziel und ggf. ein mit der Eingabevorrichtung 2 ebenfalls eingegebener Ausgangspunkt oder ein von der Selbstortungseinrichtung im Routenrechner 3 ermittelter Ausgangspunkt werden zusammen mit einer Anforderung für eine optimierte Routenberechnung auf eine Datenfernübertragungs-Schnittstelle 6 geleitet. Über die Datenfernübertragungs-Schnittstelle 6 kommuniziert die fahrzeugfeste Zielführungseinrichtung 1 mit einer Datenfernübertragungs-Schnittstelle 7 einer Zentrale 8, in der ein Zentralrechner 9 aufgrund der empfangenen Anforderung für die Rechnung einer Route zwischen einem vorgegebenen Ausgangspunkt und einem eingegebenen Fahrtziel eine Fahrtroute berechnet. Bei der Berechnung der Fahrtroute durch den Zentralrechner 9 werden aktuelle Verkehrsinformationen, die in einer Modifikationsstufe 10 abgespeichert sind, zur Modifizierung der im Zentralrechner 9 verwendeten digitalen Straßenkarte verwendet. Der leistungsfähige Zentralrechner 9 kann auf diese Weise alle für die möglichen Fahrtrouten relevanten Verkehrsinformationen berücksichtigen, so daß eine an die aktuelle Verkehrslage angepaßte optimierte Fahrtroute errechnet werden kann.The destination and entered by the input device 2 if necessary, one also entered with the input device 2 Starting point or one from the self-location facility in the Route calculator 3 determined starting point are together with a request for an optimized route calculation a remote data transmission interface 6 passed. About the Remote data transmission interface 6 communicates with the vehicle Route guidance device 1 with a remote data transmission interface 7 a control center 8, in which a central computer 9 based on the received request for the invoice a route between a given starting point and calculates a route for a destination entered. at the calculation of the route by the central computer 9 current traffic information in a modification level 10 are stored to modify the in Central computer 9 used digital road map. The powerful central computer 9 can do everything in this way relevant traffic information for the possible routes take into account, so that an adapted to the current traffic situation optimized route can be calculated.

Die optimierte Fahrtroute wird vom Zentralrechner 9 über die Datenfernübertragungs-Schnittstellen 7, 6 auf die fahrzeugfeste Zielführungseinrichtung 1 übertragen. Dies geschieht erfindungsgemäß durch Übertragung von Routenabschnitten, die zwischen dem Ausgangspunkt und dem Fahrtziel vollständig durchfahren werden müssen. Diese Routenabschnitte werden erfindungsgemäß durch eine Ortscodierung gekennzeichnet, für die vorzugsweise eine TMC-Location-Tabelle 11 verwendet wird, die der TMC-Location-Tabelle 5 der fahrzeugfesten Zielführungseinrichtung 1 entspricht. Die Routenabschnitte werden daher vorzugsweise durch eine Ortscodierung aus der Location-Tabelle 11 (16 Bit) eine Richtungsangabe für die Fahrtrichtung auf der Straße (1 Bit) und die Ausdehnung des Bereichs auf der Straße (3 Bit) definiert. Sollte der zu durchfahrende Bereich größer sein als durch die drei Ausdehnungs-Bit zu übertragen sind, wird der Bereich unterteilt und als mehrere Routenabschnitte übertragen.The optimized route is from the central computer 9 on the Remote data transmission interfaces 7, 6 to the vehicle fixed Transfer guidance device 1. this happens according to the invention by transmission of route sections that between the starting point and the destination completely have to be driven through. These route sections are according to the invention characterized by a location code for which preferably a TMC location table 11 is used which the TMC location table 5 of the vehicle-fixed route guidance device 1 corresponds. The route sections are therefore preferred by a location coding from the location table 11 (16 bit) a direction for the direction of travel on the Road (1 bit) and the extent of the area on the road (3 bit) defined. If the area to be traveled is larger be than to be transmitted through the three expansion bits the area is divided and as several route sections transfer.

Mit den übertragenen Routenabschnitten wird die digitale Karte in dem Routenrechner 3 der fahrzeugfesten Zielführungseinrichtung 1 modifiziert, wie dies anhand des in Figur 2 dargestellten Funktionsablaufs erläutert wird. With the transmitted route sections, the digital map in the route computer 3 of the vehicle-fixed route guidance device 1 modified, as this is shown in FIG. 2 Functional sequence is explained.

Ein Start 21 der fahrzeugfesten Zielführungseinrichtung gibt eine Eingabe 22 für ein Fahrtziel frei. In einem Übergabeschritt 23 werden das eingegebene Fahrtziel und die selbstgeortete Position des Kraftfahrzeugs auf die Datenfernübertragungsschnittstelle 6 übergeben. Danach verbleibt die fahrzeugfeste Zielführungseinrichtung 1 in einem Wartezustand bis zu einem Empfangsschritt 24.A start 21 of the vehicle-fixed route guidance device gives an entry 22 for a destination free. In a handover step 23 the entered destination and the self-located Position of the motor vehicle on the remote data transmission interface 6 passed. After that the vehicle remains fixed Route guidance device 1 in a waiting state up to a receiving step 24.

Ein Startschritt 41 für die Zentrale 8 versetzt diese in einen Wartezustand für eine Anfrage 23 von einer fahrzeugfesten Zielführungseinrichtung 1, die in einem Empfangsschritt 42 durch die Datenfernübertragungs-Schnittstelle 7 empfangen wird. Über mathematische Verkehrsmodelle 43, die die aktuellen Verkehrsinformationen berücksichtigen, wird eine optimal individuelle Route 44 berechnet. Diese Route wird in einem Codierschritt 45 in Routenabschnitte unterteilt und mit einer TMC-Ortscodierung charakterisiert. Die codierten Routenabschnitte werden in einem Übertragungsschritt 46 per Datenfernübertragung übertragen und in der fahrzeugfesten Zielführungseinrichtung 1 mit dem Empfangsschritt 24 empfangen. Die Funktion der Zentrale 8 ist nach dem Übertragungsschritt 46 abgeschlossen, so daß für diese Anfrage das Ende 47 der Funktion der Zentrale erreicht ist.A start step 41 for the control center 8 puts it into one Waiting state for a request 23 from a vehicle fixed Route guidance device 1, which in a reception step 42 received by the remote data transmission interface 7 becomes. About mathematical traffic models 43, the current Taking traffic information into account is an optimally individual Route 44 calculated. This route is in one coding step 45 divided into route sections and with a TMC location coding characterized. The coded route sections are transmitted in a transmission step 46 by remote data transmission transmitted and in the vehicle-fixed route guidance device 1 received with the receiving step 24. The function of the Control center 8 is completed after transmission step 46, so that for this request the end 47 of the function of the center is reached.

Mit den im Schritt 24 empfangenen Routenabschnitten wird die interne digitale Karte des Routenrechners 3 im Schritt 25 modifiziert. Die von der Zentrale 8 übertragenen Routenabschnitte werden in der internen digitalen Karte so modifiziert, daß sie bei der anschließenden eigenständigen Routenberechnung 26 durch den Routenrechner 3 bevorzugt verwendet werden. Es ergibt sich daher eine Route, die zunächst die von der Zentrale 8 vorgesehenen Routenabschnitte ebenfalls enthält, die durch eine entsprechende Anfahrt- und Zielnavigation sowie durch eine Navigation zum Schließen etwaiger Verbindungslücken mittels der fahrzeugfesten Zielführungseinrichtung ergänzt werden. With the route sections received in step 24 the internal digital map of the route computer 3 modified in step 25. The route sections transmitted from the control center 8 are modified in the internal digital map so that in the subsequent independent route calculation 26 are preferably used by the route computer 3. The result is a route that first follows that of the Central also contains 8 planned route sections, by means of a corresponding arrival and destination navigation as well through navigation to close any connection gaps supplemented by the vehicle-fixed route guidance device become.

Mit anschließenden Selbstortungen und Routenprüfungen 27 wird ständig die eigene Position des Kraftfahrzeugs und die etwaige Übereinstimmung mit der vorausberechneten Route überprüft, und es werden entsprechende Fahrempfehlungen 28 über die Ausgabeeinrichtung 4 ausgegeben, wobei neue Informationen über auf der Route liegende Verkehrsstörungen berücksichtigt werden können.With subsequent self-location and route checks 27 constantly the own position of the motor vehicle and any Checked in accordance with the pre-calculated route, and there are corresponding driving recommendations 28 via the output device 4 issued, with new information on traffic incidents along the route are taken into account can.

In einem anschließenden Überprüfungsschritt 29 wird überprüft, ob eine größere Abweichung von der vorausberechneten Fahrtroute eine Neuberechnung der Fahrtroute aufgrund des aktuellen Standortes des Fahrzeuges erforderlich macht. Eine Neuberechnung kann auch durch zeitliche Einflüsse (Pausen, Ablauf einer vorgegebenen Zeitspanne, geplante Fahrtzeit überschritten) erforderlich werden. Ist dies der Fall, wird der Funktionsablauf auf den Moment nach der Eingabe des Fahrziels 22 zurückgestellt und eine neue Routenberechnung mit Hilfe der Zentrale 8 angefordert. Ist keine Neuberechnung 29 erforderlich, wird im Prüfschritt 30 abgefragt, ob das Fahrtziel erreicht ist. Ist dies nicht der Fall, werden die Schritte 27 bis 29 wiederholt, bis das Fahrtziel erreicht wird. Ist das Fahrtziel erreicht, wird im Schritt 31 die für den aktuellen Fahrtauftrag vorgenommene Modifikation der internen digitalen Straßenkarte (Schritt 25) aufgehoben, so daß der Ursprungszustand der fahrzeugfesten Zielführungseinrichtung 1 wiederhergestellt ist. Danach ist die Funktion der fahrzeugfesten Zielführungseinrichtung 1 für diesen Auftrag abgeschlossen, so daß der Funktionsablauf auf "Ende" 32 gesetzt wird.In a subsequent checking step 29, it is checked whether whether there is a major deviation from the predicted route a recalculation of the route based on the current one Location of the vehicle. A recalculation can also be caused by temporal influences (breaks, expiry a specified time span, planned travel time exceeded) become necessary. If this is the case, the functional sequence the moment after entering destination 22 deferred and a new route calculation using the Central 8 requested. If no recalculation 29 is required, is checked in test step 30 whether the destination has been reached is. If this is not the case, steps 27 to 29 repeatedly until the destination is reached. Is this Destination reached, in step 31, the current one Modification of the internal digital travel order Road map (step 25) canceled so that the original state the vehicle-fixed route guidance device 1 restored is. Then the function of the vehicle-fixed route guidance device 1 completed for this job so that the functional sequence is set to "end" 32.

Beispiel:Example:

Ausgangspunkt eines Kraftfahrzeugs ist der Hafen in Husum. Eingegeben wird das Fahrtziel Bad Segeberg, Bahnhof. Standort und Fahrtziel werden per Datenfernübertragung zwischen den Schnittstellen 6, 7 in dem Übermittlungsschritt 23 übermittelt und von einer Zentrale 8 im Empfangsschritt 42 empfangen. Die Zentrale 8 bietet die Erstellung individueller optimierter Fahrtrouten als Service an und errechnet die individuelle optimale Route. Die Übertragung dieser Route erfolgt durch die Übertragung folgender Routenabschnitte:

  • B 201 von Husum zur Auffahrt Schleswig/Schuby. TMC-Location: 25761, Richtung: -,Extent:2
  • A 7 von Schleswig/Schuby nach Bad Bramstedt. TMC-Location: 12390, Richtung: -,Extent:14 (als zwei Strecken zu übertragen)
  • B 206 von Bad Bramstedt nach Bad Segeberg. TMC-Location: 21634, Richtung: -,Extent:2.
The starting point of a motor vehicle is the port in Husum. The destination Bad Segeberg, train station is entered. The location and destination are transmitted by remote data transmission between the interfaces 6, 7 in the transmission step 23 and received by a control center 8 in the reception step 42. The control center 8 offers the creation of individually optimized travel routes as a service and calculates the individual optimal route. This route is transmitted by transmitting the following route sections:
  • B 201 from Husum to the Schleswig / Schuby driveway. TMC location: 25761, direction: -, extent: 2
  • A 7 from Schleswig / Schuby to Bad Bramstedt. TMC location: 12390, direction: -, extent: 14 (to be transmitted as two routes)
  • B 206 from Bad Bramstedt to Bad Segeberg. TMC location: 21634, direction: -, extent: 2.

Diese Route wird in einem SMS-Signal wie folgt übertragen:

Bit 1..16:
Protocol Discriminator, BulkFlag und MessageType nach prENV/278/4/3/0015
Bit 17..32:
Service Id. CountryCode und DatabaseId zur Vereinbarung der verwendeten TMC-Location-Tabelle entsprechend allgemein verwendeten TMC-Verfahren.
Bit 33..52:
Teilstrecke von Bad Bramstedt nach Bad Segeberg.
Bit 53..72:
Teilstrecke von Schleswig/Schuby nach Bordesholm.
Bit 72..92:
Teilstrecke von Bordesholm nach Bad Bramstedt.
Bit 93..112:
Teilstrecke von Husum nach Schleswig/Schuby.
Bit 113..1120:
Unbenutzt.
This route is transmitted in an SMS signal as follows:
Bit 1..16:
Protocol Discriminator, BulkFlag and MessageType according to prENV / 278/4/3/0015
Bit 17..32:
Service Id. CountryCode and DatabaseId to agree the TMC location table used in accordance with generally used TMC procedures.
Bit 33..52:
Section from Bad Bramstedt to Bad Segeberg.
Bit 53..72:
Section from Schleswig / Schuby to Bordesholm.
Bit 72..92:
Section from Bordesholm to Bad Bramstedt.
Bit 93..112:
Section from Husum to Schleswig / Schuby.
Bit 113..1120:
Unused.

Nachdem diese Routenabschnitte in dem Sendeschritt 46 von der Zentrale 8 gesendet und im Empfangsschritt 24 von der fahrzeugfesten Zielführungseinrichtung 1 empfangen worden ist, wird bei der Routensuche 26 des Routenrechners 3 die Zeitspanne zur Passage eines übertragenen Routenabschnitts in der Modifikationsstufe 25 deutlich heruntergesetzt. Für die nicht übertragenen Routenabschnitte, die zur Ergänzung der Gesamtroute erforderlich sind, wird der normale Zielführungsalgorithmus des Routenrechners 3 benutzt.After these route sections in the transmission step 46 from the Central 8 sent and in the receiving step 24 of the vehicle fixed Route guidance device 1 has been received, the time span during the route search 26 of the route computer 3 for the passage of a transmitted route section in the Modification level 25 significantly reduced. Not for them transferred route sections, which supplement the overall route are required, the normal route guidance algorithm the route computer 3 used.

Claims (9)

  1. Method for taking into account supplementary traffic information for the functioning of a routing device (1) of a motor vehicle which contains an internal digital roadmap and is fixed to the vehicle, by transferring the starting point and destination to a central processing unit (9) and transmitting a route plan, produced in the central processing unit (9) taking into account the supplementary traffic information, to the routing device (1) of the motor vehicle which is fixed to the vehicle, characterized in that the internal digital roadmap of the routing device (1) is provided with information for locality coding, in that the transmission of the route plan is carried out by specifying route sections which are defined by the locality coding and which lie between the starting point and the destination, and in that the transmitted route sections are modified in the internal digital roadmap of the routing device (1) in such a way that they are taken into account in the route search which is subsequently carried out in the routing device which is fixed to the vehicle, as opposed to other route sections which are not transmitted.
  2. Method according to Claim 1, characterized in that the coding of the route sections is performed as a combination of coding for a specific position on a specific road, coding for the direction on the road and coding of the extent of the route section on the road.
  3. Method according to Claim 2, characterized in that the coding of the route sections is performed with TMC location codes.
  4. Method according to Claim 1, characterized in that the coding of the route sections is performed by specifying entry and exit points on a road.
  5. Method according to one of Claims 1 to 4, characterized in that the coded route sections are transmitted by means of an SMS transmission.
  6. Method according to one of Claims 1 to 5, characterized in that the modification of a route section is rescinded by the routing device which is fixed to the vehicle, on the basis of the reception of information relating to traffic obstruction for this route section.
  7. Method according to one of Claims 1 to 6, characterized in that the modification of the transferred route sections is cancelled after the destination is reached.
  8. Method according to one of Claims 1 to 7, characterized in that when specific chronological and/or local deviations from the route plan of the control centre are exceeded, a renewed route plan is automatically triggered by the control centre.
  9. Method according to one of Claims 1 to 8, characterized in that when a renewed route plan is transmitted by the control centre, the previous modification of the transmitted route sections is cancelled.
EP98962173A 1997-10-25 1998-10-22 Method and consideration of supplementary traffic information in a navigation device which is installed in a vehicle Expired - Lifetime EP1023713B1 (en)

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DE19747230A DE19747230A1 (en) 1997-10-25 1997-10-25 Method for taking additional traffic information into account in a vehicle-mounted route guidance device
DE19747230 1997-10-25
PCT/DE1998/003098 WO1999022354A2 (en) 1997-10-25 1998-10-22 Method and consideration of supplementary traffic information in a navigation device which is installed in a vehicle

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DE (2) DE19747230A1 (en)
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US6321162B1 (en) 2001-11-20
ES2182384T3 (en) 2003-03-01
DE59805208D1 (en) 2002-09-19
WO1999022354A2 (en) 1999-05-06
WO1999022354A3 (en) 1999-08-05
EP1023713A2 (en) 2000-08-02
DE19747230A1 (en) 1999-05-12

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