EP1118068A1 - Method and array for selecting traffic information services that can be received with at least one mobile receiver - Google Patents

Method and array for selecting traffic information services that can be received with at least one mobile receiver

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Publication number
EP1118068A1
EP1118068A1 EP00956071A EP00956071A EP1118068A1 EP 1118068 A1 EP1118068 A1 EP 1118068A1 EP 00956071 A EP00956071 A EP 00956071A EP 00956071 A EP00956071 A EP 00956071A EP 1118068 A1 EP1118068 A1 EP 1118068A1
Authority
EP
European Patent Office
Prior art keywords
route
receiver
area
transmitter
list
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00956071A
Other languages
German (de)
French (fr)
Other versions
EP1118068B1 (en
Inventor
Heinrich Schmidt
Katrin Brinkmann
Ralf Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication date
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1118068A1 publication Critical patent/EP1118068A1/en
Application granted granted Critical
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/093—Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/094—Hardware aspects; Signal processing or signal properties, e.g. frequency bands

Definitions

  • the invention relates to a method and arrangements for selecting traffic information services receivable with at least one mobile receiver, which are relevant for a route previously determined by a navigation device connected with at least one receiver.
  • Traffic information services can also be transmitted via transmission media other than RDS broadcasting, for example via digital radio (DAB) or via mobile radio networks in accordance with the GSM standard.
  • DAB digital radio
  • this object is achieved in that for the determined route, service information is identified from a stored list, which identifies the services with traffic reports relevant to the route. that in the case of several services, a table is created which contains the service information which has been read out sorted according to an evaluation and which can be changed when the route is being followed, and that a receiver is set in each case to the most highly rated service.
  • the evaluation can take place according to features which characterize the services and can be received together with the services themselves or can be read out from a memory at the receiver.
  • the DAB tuner can preferably be set, for example, in areas which are supplied by the DAB, in the remaining areas the RDS tuner and on selected routes or on special request of the user, commercial services which are transmitted via GSM. It is also possible to save and use traffic reports received by several services for each area.
  • a further development of the present invention makes it possible, when searching for a route, with the aid of a navigation device, to select the service which can be received by a receiver such that the reception of relevant traffic reports is optimized as far as possible over the entire route.
  • At least one receiver is a radio receiver for receiving stations with traffic reports, for the determined route, program identification codes are read out from a stored list, which transmitters identify traffic reports relevant to the determined route that in the case of several read program identification codes, a table is created which contains the read Contains program identification codes sorted according to an evaluation and which can be changed when the route is being followed, and that the radio receiver is set in each case to the most highly rated receivable transmitter.
  • this method can be used after a slight adjustment to the technical specification of the service.
  • Navigation devices which also calculate the route taking into account the current traffic situation, can - provided that traffic reports are supplied to them to a sufficient extent - correct the route based on the traffic reports both when starting a journey and when a route is initially calculated during the journey. Furthermore, a recalculation of the route may be necessary during a journey if the vehicle (whether wanted or unwanted) deviates from the calculated route. Regardless of this, the method according to the invention enables the setting of the best transmitters available for this purpose.
  • the stored list for the program identification codes contains information about the reception area, the area covered by the message content (message area), the known frequencies and about any other message selection carried out by the transmitter.
  • the table of the stations to be set is determined and updated by comparing positions on the route with area information in the list.
  • the entries in the table determined in this way are sorted in such a way that transmitters with the most suitable message content are at the top.
  • the sorted table is transferred to a control device of the radio receiver and is used there as the basis for a station search, the station at the top being searched for first.
  • Broadcasters often have different preferences when selecting the traffic reports they broadcast. For example, there are stations that only broadcast local traffic reports or those that broadcast traffic reports for a larger area. These properties of the transmitters can be used with another further development in that when sorting the respective class of the roads to be driven is related to the other message selection of the transmitter, which identifies the road classes for which the respective transmitter sends traffic reports.
  • a particularly favorable option for the geographic selection of the various transmitters or PI codes without the relatively complex storage of coordinates can be done according to an advantageous embodiment in that the list of geographic areas into which a digital road map for the navigation device is divided, the associated
  • Program identification codes are listed and that when the route is tracked, the program identification codes are read out and sorted in regions.
  • the radio receiver has two receiving parts which can be set independently of one another.
  • Fig. 1 a radio receiver and a
  • Fig. 2 shows a section of a road map
  • FIG. 4 shows as a flowchart a program designed to carry out the method according to the invention for a microprocessor located in the navigation device.
  • the radio receiver shown in FIG. 1 has a receiving part 2 with an antenna 1, the output of which is connected on the one hand via an LF processor 4 and output stages 5, 6 to speakers 7, 8 and on the other hand via an RDS decoder 3 to a microprocessor 13 ,
  • This is used to control the entire radio receiver and is designed, among other things, to select and decode individual information, for example program identification codes (PI codes) and digital traffic reports, from the 3 decoded RDS signal.
  • PI codes program identification codes
  • digital traffic reports from the 3 decoded RDS signal.
  • the microprocessor 13 is also connected to a keyboard 14 and a display 15, with which various inputs (transmitter setting, volume, muting received stations) and required information (operating state of the receiver, station set, traffic reports shown as text) can be given.
  • the microprocessor 13 also has an output which is connected to a control input of the receiving part 2 so that the receiving part 2 can be set to 14 by hand or to transmitters stored in the microprocessor 13.
  • the microprocessor 13 of the radio receiver is connected via a bidirectional data connection 10 to a navigation device which can also be controlled by a microprocessor, not shown.
  • the information required for the route search or for adapting the route search to the respective course of the journey is taken from a mass storage device 18, for example a CD-ROM, and a GPS locating device 17.
  • TMC messages In addition to a digital road map, a section of which is shown in FIG. 2, there is a list in the mass memory 18 of those transmitters which broadcast digitally coded traffic reports (TMC messages).
  • the list is arranged according to Pl codes and contains for each Pl code a reception area, a message area, frequencies on which programs are broadcast with the respective Pl code, and the other message selection carried out by the broadcaster - e.g. only local, regional and national reports.
  • the list shown in detail in FIG. 3a) shows entries of the five transmitters Sa to Se with the PI codes PI1 to PI5.
  • the reception areas of the transmitters Sa to Se are shown in FIG. 2 in the same way as the transmitters.
  • the file is particularly simple in that areas of the digital map (FIG. 2) are subdivided into areas - also called PI areas in the following - and that the responsible transmitters are identified in the list for each of these areas.
  • the list according to FIG. 3a) shows, for example, that the transmitter Sa transmits traffic reports for the area C2 and the transmitter Sb transmits traffic reports for the areas C1, C2 and B2. This eliminates the need to assign the message areas of the individual transmitters to the geographic coordinates.
  • the navigation device 16 determines on the basis of its own position in which PI area the vehicle is located and can then jump directly to the corresponding section of the PI code table, where it then finds one or more PI codes, for example in 3a) for the area C2, the PI codes PH to PI4.
  • the route is first checked to determine which road classes are used, whether they are highways or inner-city roads, for example. This process is explained in more detail below with reference to FIGS. 2 and 3. 2 shows a section of a total of 16 PI areas A1 to D4 of the digital road map. For a journey from a location X to a location Y, a route search has shown that first of all an inner-city road 21 to an autobahn interchange 22, then a journey on the freeway 23 to the interchange 24 and finally an inter-urban road 25 are used again becomes. Another road 26, which also leads from X to Y, is not proposed to the driver, since this winding route is longer and also takes more time.
  • the reception areas of the transmitters Sa to Se are indicated as circles or ellipses. If the largest part of a PI area falls within the reception area, this is listed in the table according to FIG. 3a) for the respective transmitter.
  • the transmitters Sa and Se are local transmitters, while the transmitters Sb, Sc and Sd can be received nationwide.
  • the receiver is in area C2.
  • the stations Sa to Sd should be receivable there. Since the first route 21 is not a freeway, the local transmitter Sa is first given the highest priority. The remaining stations are evaluated in the subsequent PI areas B2 and A2 after evaluating their reception. Since the Transmitter Sd can be received in all three PI areas, the transmitters are transferred to the microprocessor 13 of the radio receiver in the order Sa, Sd, Sb, Sc shown in FIG. 3b).
  • transmitter Sd Even before reaching the freeway at 22, the ratio between inner-city or local streets 21 to the freeway 23 drops so much that the prioritization of the transmitter Sa is omitted. This will set transmitter Sd next, although transmitters Sb and transmitter Sc may offer higher field strengths. The transmitter Sd remains set until the transition to the PI area A2. There, the navigation device determines that predominantly secondary routes are used for the remaining route, and therefore prioritizes the transmitter Se (FIG. 3c) which is cheapest for this PI area, which then remains tuned to the destination Y.
  • FIG. 4 shows as a flow chart a program which is provided in a microprocessor of the navigation device for carrying out the method according to the invention.
  • the route is calculated at 33 with the result X, 22, 24, Y.
  • the program then waits for an entry as to whether dynamic route guidance is desired. If this is not the case, the program is ended at 35. However, if dynamic route guidance is desired, the PI areas are determined at 36, in the present case C2, B2 and A2.
  • associated PI codes are then determined using the table in accordance with FIG. 3a.
  • the program branches depending on whether the number of NPI of the PI codes determined is greater than zero. If no suitable PI code was found beforehand, no list is passed on to the radio receiver. In this case, the radio receiver must be on its own - that is, with the usual procedure - search for suitable stations with traffic reports.
  • branch 38 is followed by the transfer of the PI list (FIG. 3b) to the radio receiver.
  • the program ends at 35.
  • the position and thus the route still to be traveled are updated at 41.
  • Received TMC messages are also taken into account, so that other routes may be selected in the event of traffic disruptions. If the receiver has come into a new PI area due to the trip on the originally calculated route or on a newly calculated route, after branching 42 it is again detected at 36 which PI areas the further trip is going to be followed by a new one at 37 The associated PI codes are determined. As long as the receiver has not yet reached a new area at 42 and the destination has not yet been reached, the position and the route are updated at 41 without the PI codes having to be redetermined.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Navigation (AREA)
  • Traffic Control Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Stored Programmes (AREA)

Abstract

In a method and systems for selecting traffic information services that are receivable by at least one mobile receiver and are relevant for a route previously determined by a navigational device linked to at least one receiver, service information, which identifies the services having traffic messages relevant for the route, is read out from a stored list for the determined route. In the case of a plurality of services, a table is created that includes the read-out service information, which is sorted according to a valuation and is able to be modified as the route is followed. A receiver is set, in each case, to the highest-rated service.

Description

Verfahren und Anordnung zur Selektion von mit mindestens einem mobilen Empfänger empfangbaren VerkehrsInformationsdienstenMethod and arrangement for selecting traffic information services receivable with at least one mobile receiver
Die Erfindung betrifft ein Verfahren und Anordnungen zur Selektion von mit mindestens einem mobilen Empfänger empfangbaren Verkehrsinformationsdiensten, die für eine von einer mit mindestens einem Empfänger verbundenen Navigationseinrichtung zuvor ermittelte Route relevant sind.The invention relates to a method and arrangements for selecting traffic information services receivable with at least one mobile receiver, which are relevant for a route previously determined by a navigation device connected with at least one receiver.
Moderne Navigationseinrichtungen für Kraftfahrzeuge sind heute in der Lage, Routen auch unter Berücksichtigung der jeweiligen Verkehrslage zu berechnen. Dazu sind den Navigationseinrichtungen Meldungen über die Verkehrslage zuzuführen, wozu als Meldungsquelle Rundfunksender mit digital codierten Verkehrsmeldungen (TMC-Meldungen, TMC = Traffic Message Channel) und weitere Quellen und Dienste nutzbar sind. Dazu ist es jedoch erforderlich, den Empfänger, der mit der Navigationseinrichtung verbunden ist, auf einen Dienst einzustellen, der für das von der Route durchquerte geographische Gebiet relevante Verkehrsmeldungen sendet. Wird eine solche Einstellung quasi zufällig vorgenommen, kann es vorkommen, daß ein Dienst eingestellt wird, der die für die jeweilige Route relevanten Meldungen nicht oder nur selten sendet.Modern navigation devices for motor vehicles are now able to calculate routes taking into account the respective traffic situation. For this purpose, messages about the traffic situation are to be supplied to the navigation devices, for which purpose radio broadcasters with digitally coded traffic reports (TMC messages, TMC = Traffic Message Channel) and other sources and services can be used. To do this, however, it is necessary to set the receiver that is connected to the navigation device to a service that sends traffic reports relevant to the geographic area traversed by the route. If such a setting is made almost randomly, it can happen that a service is set that does not or only rarely sends the messages relevant to the respective route.
Durch DE 44 42 413 A1 ist ein Verfahren zur Einstellung eines mobilen Rundfunkempfängers und ein Rundfunkempfänger bekanntgeworden, bei dem die jeweils von einer Navigationseinrichtung ermittelte Position zum Auslesen von Programmidentifikations-Codes aus einer Liste benutzt wird, so daß ein Sender gefunden wird, der für die ermittelte Position relevante Informationen sendet. Hiermit sind zwar gute Ergebnisse erzielbar, wenn der Benutzer eines Rundfunkempfängers für seine jeweilige Position gültige Verkehrsmeldungen empfangen will und dazu den richtigen Sender benötigt. Die Einstellung von mehreren Rundfunksendern entlang der jeweils berechneten Route, wobei sich sowohl die Sendereinstellung als auch die Routensuche dynamisch verhalten, ist bei dem bekannten Verfahren jedoch nicht möglich.From DE 44 42 413 A1 a method for setting a mobile radio receiver and a radio receiver has become known, in which the position determined by a navigation device is used to read program identification codes from a list, so that a transmitter is found which is suitable for the determined position sends relevant information. Good results can be achieved with this if the user of a radio receiver wants to receive traffic announcements valid for his respective position and therefore requires the correct transmitter. However, the setting of several radio transmitters along the respective calculated route, with both the transmitter setting and the route search behaving dynamically, is not possible with the known method.
Die Übertragung von Verkehrsinformationsdiensten ist auch über andere Übertragungsmedien als RDS-Rundfunk, beispielsweise über digitalen Hörfunk (DAB) oder über Mobilfunknetze nach dem GSM-Standard möglich.Traffic information services can also be transmitted via transmission media other than RDS broadcasting, for example via digital radio (DAB) or via mobile radio networks in accordance with the GSM standard.
Aufgabe der vorliegenden Erfindung ist es, bei einer Routensuche mit Hilfe einer Navigationseinrichtung unter den zur Verfügung stehenden Übertragungsmedien und/oder Sendern eine Auswahl zu treffen, welche eine optimale Versorgung mit Verkehrsinformationen über die gesamte Route ermöglicht.It is an object of the present invention to make a selection from the available transmission media and / or transmitters when searching for a route using a navigation device, which enables an optimal supply of traffic information about the entire route.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß für die ermittelte Route aus einer gespeicherten Liste Diensteinformationen ausgelesen werden, welche die Dienste mit für die Route relevanten Verkehrsmeldungen kennzeichnen, daß im Falle von mehreren Diensten eine Tabelle erstellt wird, welche die ausgelesenen Diensteinformationen nach einer Bewertung sortiert enthält und welche bei der Verfolgung der Route veränderbar ist, und daß ein Empfänger jeweils auf den am höchsten bewerteten Dienst eingestellt wird.According to the invention, this object is achieved in that for the determined route, service information is identified from a stored list, which identifies the services with traffic reports relevant to the route. that in the case of several services, a table is created which contains the service information which has been read out sorted according to an evaluation and which can be changed when the route is being followed, and that a receiver is set in each case to the most highly rated service.
Die Bewertung kann nach Merkmalen erfolgen, welche die Dienste charakterisieren und zusammen mit den Diensten selbst empfangen oder aus einem Speicher beim Empfänger ausgelesen werden können.The evaluation can take place according to features which characterize the services and can be received together with the services themselves or can be read out from a memory at the receiver.
Mit dem erfindungsgemäßen Verfahren kann beispielsweise in Gebieten, die vom DAB versorgt sind, bevorzugt der DAB-Tuner eingestellt werden, in den restlichen Gebieten der RDS-Tuner und auf ausgewählten Strecken oder auf besondere Anforderung des Nutzers kommerzielle Dienste, die über GSM übertragen werden. Es ist ferner möglich, für jeweils ein Gebiet auch von mehreren Diensten empfangene Verkehrsmeldungen zu speichern und zu nutzen.With the method according to the invention, the DAB tuner can preferably be set, for example, in areas which are supplied by the DAB, in the remaining areas the RDS tuner and on selected routes or on special request of the user, commercial services which are transmitted via GSM. It is also possible to save and use traffic reports received by several services for each area.
Eine Weiterbildung der vorliegenden Erfindung ermöglicht es, bei einer Routensuche mit Hilfe einer Navigationseinrichtung die von einem Empfänger empfangbaren Dienst derart auszuwählen, daß möglichst über die gesamte Route der Empfang von relevanten Verkehrsmeldungen optimiert ist .A further development of the present invention makes it possible, when searching for a route, with the aid of a navigation device, to select the service which can be received by a receiver such that the reception of relevant traffic reports is optimized as far as possible over the entire route.
Dies wird im derzeitigen Rundfunk zum Beispiel dadurch erreicht, daß mindestens ein Empfänger ein Rundf nkempfänger zum Empfang von Sendern mit Verkehrsmeldungen ist, daß für die ermittelte Route aus einer gespeicherten Liste Programmidentifikations-Codes ausgelesen werden, welche Sender mit für die ermittelte Route relevanten Verkehrsmeldungen kennzeichnen, daß im Falle von mehreren ausgelesenen Programmidentifikations-Codes eine Tabelle erstellt wird, welche die ausgelesenen Programmidentifikations-Codes nach einer Bewertung sortiert enthält und welche bei einer Verfolgung der Route veränderbar ist, und daß der Rundfunkempfänger jeweils auf den am höchsten bewerteten empfangbaren Sender eingestellt wird.This is achieved in current broadcasting, for example, in that at least one receiver is a radio receiver for receiving stations with traffic reports, for the determined route, program identification codes are read out from a stored list, which transmitters identify traffic reports relevant to the determined route that in the case of several read program identification codes, a table is created which contains the read Contains program identification codes sorted according to an evaluation and which can be changed when the route is being followed, and that the radio receiver is set in each case to the most highly rated receivable transmitter.
Bei den weiteren Diensten, beispielsweise beim DAB, ist dieses Verfahren nach geringfügiger Anpassung an die technische Spezifikation des Dienstes anwendbar.In the case of the other services, for example the DAB, this method can be used after a slight adjustment to the technical specification of the service.
Navigationseinrichtungen, welche die Route auch unter Berücksichtigung der aktuellen Verkehrslage berechnen, können - sofern ihnen Verkehrsmeldungen in ausreichendem Maße zugeführt werden -, sowohl beim Start einer Fahrt als auch bei einer zunächst einmal berechneten Route während der Fahrt die Route aufgrund der Verkehrsmeldungen korrigieren. Ferner kann während einer Fahrt eine Neuberechnung der Route erforderlich werden, wenn das Fahrzeug (ob gewollt oder ungewollt) von der berechneten Route abweicht. Das erfindungsgemäße Verfahren ermöglicht unabhängig davon die Einstellung der besten für diesen Zweck verfügbaren Sender.Navigation devices, which also calculate the route taking into account the current traffic situation, can - provided that traffic reports are supplied to them to a sufficient extent - correct the route based on the traffic reports both when starting a journey and when a route is initially calculated during the journey. Furthermore, a recalculation of the route may be necessary during a journey if the vehicle (whether wanted or unwanted) deviates from the calculated route. Regardless of this, the method according to the invention enables the setting of the best transmitters available for this purpose.
Vorzugsweise ist bei dem erfindungsgemäßen Verfahren vorgesehen, daß die gespeicherte Liste für die Programmidentifikations-Codes Informationen über das Empfangsgebiet, das von den Meldungsinhalten abgedeckte Gebiet (Meldungsgebiet ) , die bekannten Frequenzen und über eine vom Sender durchgeführte sonstige Meldungsselektion enthält .It is preferably provided in the method according to the invention that the stored list for the program identification codes contains information about the reception area, the area covered by the message content (message area), the known frequencies and about any other message selection carried out by the transmitter.
Häufig sind für ein und das gleiche geographische Gebiet mehrere Sender relevant. Um auch dabei eine Optimierung durchzuführen, ist bei einer anderen Weiterbildung vorgesehen, daß die Tabelle der einzustellenden Sender durch Vergleich von Positionen auf der Route mit Gebietsangaben in der Liste ermittelt und aktualisiert wird. Vorzugsweise werden die Eintragungen in der so ermittelten Tabelle derart sortiert, daß Sender mit am besten passenden Meldungsinhalten an oberster Stelle stehen.Often several transmitters are relevant for the same geographic area. In order to carry out an optimization here as well, another development provides that the table of the stations to be set is determined and updated by comparing positions on the route with area information in the list. Preferably the entries in the table determined in this way are sorted in such a way that transmitters with the most suitable message content are at the top.
Im einzelnen kann dabei ferner vorgesehen sein, daß die sortierte Tabelle an eine Steuereinrichtung des Rundfunkempfängers übergeben wird und dort als Basis für eine Sendersuche dient, wobei der an der obersten Stelle stehende Sender zuerst gesucht wird.In particular, it can also be provided that the sorted table is transferred to a control device of the radio receiver and is used there as the basis for a station search, the station at the top being searched for first.
Sender haben häufig verschiedene Präferenzen bei der Selektion der von ihnen ausgestrahlten Verkehrsmeldungen. So gibt es beispielsweise Sender, die lediglich lokale Verkehrsmeldungen aussenden oder solche, die Verkehrsmeldungen für einen größeren Bereich abstrahlen. Diese Eigenschaften der Sender können mit einer anderen Weiterbildung dadurch genutzt werden, daß bei der Sortierung die jeweilige Klasse der zu befahrenden Straßen in Relation zu der sonstigen Meldungsselektion des Senders steht, welche die Straßenklassen kennzeichnet, für welche der jeweilige Sender Verkehrsmeldungen sendet.Broadcasters often have different preferences when selecting the traffic reports they broadcast. For example, there are stations that only broadcast local traffic reports or those that broadcast traffic reports for a larger area. These properties of the transmitters can be used with another further development in that when sorting the respective class of the roads to be driven is related to the other message selection of the transmitter, which identifies the road classes for which the respective transmitter sends traffic reports.
Eine besonders günstige Möglichkeit zur geographischen Selektion der verschiedenen Sender bzw. Pl-Codes ohne die relativ aufwendige Speicherung von Koordinaten kann gemäß einer vorteilhaften Ausgestaltung dadurch erfolgen, daß in der Liste zu geographischen Gebieten, in welche eine digitale Straßenkarte für die Navigationseinrichtung aufgeteilt ist, die zugehörigenA particularly favorable option for the geographic selection of the various transmitters or PI codes without the relatively complex storage of coordinates can be done according to an advantageous embodiment in that the list of geographic areas into which a digital road map for the navigation device is divided, the associated
Programmidentifikations-Codes aufgeführt sind und daß bei einer Verfolgung der Route gebietsweise die Programmidentifikations-Codes ausgelesen und sortiert werden. Bei dieser vorteilhaften Ausgestaltung ist eine recht genaue Berücksichtigung der Straßenklassen dadurch möglich, daß bei der Sortierung die jeweilige Klasse der zu befahrenden Straßen in Relation zu der sonstigen Meldungsselektion des Senders steht, welche die Größe des Gebiets bezeichnet, für welche der jeweilige Sender Verkehrsmeldungen sendet, und daß bei verschiedenen Straßenklassen innerhalb eines Gebiets diejenige zur Sortierung verwendet wird, welche innerhalb des Gebiets überwiegt.Program identification codes are listed and that when the route is tracked, the program identification codes are read out and sorted in regions. In this advantageous embodiment, it is possible to take the road classes very precisely into account by sorting the respective class of roads to be driven in relation to the other message selection of the transmitter, which denotes the size of the area for which the respective transmitter sends traffic reports, and that for different road classes within an area, the one that predominates within the area is used for sorting.
Eine sichere Übereinstimmung des Aktualisierungsstandes der Liste und der digitalen Straßenkarte ist bei einer vorteilhaften Anordnung zur Durchführung des erfindungsgemäßen Verfahrens dadurch gewährleistet, daß die Liste auf dem selben Datenträger gespeichert ist wie eine digitale Straßenkarte, vorzugsweise auf einer optisch abtastbaren Scheibe (CD-ROM).In an advantageous arrangement for carrying out the method according to the invention, a reliable match of the update status of the list and the digital road map is ensured in that the list is stored on the same data carrier as a digital road map, preferably on an optically scannable disk (CD-ROM).
Zur laufenden Anpassung der Route an möglicherweise schnell wechselnde Verkehrslagen kann ein häufiger Zugriff auf TMC-Sender erforderlich sein. Damit dies nicht mit störenden Unterbrechungen des Empfangs der übrigen Programme verbunden ist, ist bei einer anderen vorteilhaften Anordnung zur Durchführung des erfindungsgemäßen Verfahrens vorgesehen, daß der Rundfunkempfänger zwei unabhängig voneinander einstellbare Empfangsteile aufweist.Frequent access to TMC transmitters may be required to continuously adapt the route to traffic conditions that may change quickly. So that this is not associated with disruptive interruptions in the reception of the other programs, another advantageous arrangement for carrying out the method according to the invention provides that the radio receiver has two receiving parts which can be set independently of one another.
Ausführungsbeispiele der Erfindung sind in der Zeichnung anhand mehrerer Figuren dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigt:Exemplary embodiments of the invention are shown in the drawing using several figures and are explained in more detail in the following description. It shows:
Fig. 1 einen Rundfunkempfänger und eineFig. 1 a radio receiver and a
Navigationseinrichtung, die zur Durchführung des erfindungsgemäßen Verfahrens eingerichtet sind, Fig. 2 einen Ausschnitt aus einer Straßenkarte zurNavigation device that is set up to carry out the method according to the invention, Fig. 2 shows a section of a road map
Erläuterung des erfindungsgemäßen Verfahrens,Explanation of the method according to the invention,
Fig. 3 eine bei dem erfindungsgemäßen Verfahren benutzte PI-Liste und Tabellen und3 shows a PI list and tables and used in the method according to the invention
Fig. 4 als Flußdiagramm ein zur Durchführung des erfindungsgemäßen Verfahrens ausgelegtes Programm für einen in der Navigationseinrichtung befindlichen Mikroprozessor .4 shows as a flowchart a program designed to carry out the method according to the invention for a microprocessor located in the navigation device.
Der in Fig. 1 dargestellte Rundfunkempfänger weist einen Empfangsteil 2 mit einer Antenne 1 auf, dessen Ausgang einerseits über einen NF-Prozessor 4 und Endstufen 5, 6 mit Lautsprechern 7, 8 und andererseits über einen RDS-Decoder 3 mit einem Mikroprozessor 13 verbunden ist. Dieser dient zur Steuerung des gesamten Rundfunkempfängers und ist unter anderem dafür ausgelegt, aus dem bei 3 decodierten RDS-Signal einzelne Informationen, beispielsweise Programmidentifikations-Codes (Pl-Codes) und digitale Verkehrsmeldungen, zu selektieren und diese zu decodieren.The radio receiver shown in FIG. 1 has a receiving part 2 with an antenna 1, the output of which is connected on the one hand via an LF processor 4 and output stages 5, 6 to speakers 7, 8 and on the other hand via an RDS decoder 3 to a microprocessor 13 , This is used to control the entire radio receiver and is designed, among other things, to select and decode individual information, for example program identification codes (PI codes) and digital traffic reports, from the 3 decoded RDS signal.
Der Mikroprozessor 13 ist ferner mit einer Tastatur 14 und einem Display 15 verbunden, mit welchen diverse Eingaben (Sendereinstellung, Lautstärke, Stummschaltung von empfangenen Sendern) vorgenommen und erforderliche Informationen (Betriebszustand des Empfängers, eingestellter Sender, als Text dargestellte Verkehrsmeldungen) gegeben werden können. Der Mikroprozessor 13 verfügt ferner über einen Ausgang, der mit einem Steuereingang des Empfangsteils 2 verbunden ist, damit das Empfangsteil 2 auf bei 14 per Hand oder auf im Mikroprozessor 13 gespeicherte Sender eingestellt werden kann. Der Mikroprozessor 13 des Rundfunkempfängers ist über eine bidirektionale Datenverbindung 10 mit einer Navigationseinrichtung verbunden, die ebenfalls von einem nicht dargestellten Mikroprozessor steuerbar ist. Die zur Routensuche bzw. die zur Anpassung der Routensuche an den jeweiligen Fahrtverlauf erforderlichen Informationen werden einem Massespeicher 18, beispielsweise einem CD-ROM, und einem GPS-Ortungsgerät 17 entnommen. Neben einer digitalen Straßenkarte, von der in Fig. 2 ein Ausschnitt dargestellt ist, befindet sich im Massespeicher 18 eine Liste derjenigen Sender, welche digital codierte Verkehrsmeldungen (TMC-Meldungen) ausstrahlen. Die Liste ist nach Pl-Codes geordnet und enthält zu jeweils einem Pl-Code ein Empfangsgebiet, ein Meldungsgebiet, Frequenzen, auf welchen Programme mit dem jeweiligen Pl-Code gesendet werden, und die vom Sender durchgeführte sonstige Meldungsselektion - beispielsweise nur lokale, regionale und nationale Meldungen.The microprocessor 13 is also connected to a keyboard 14 and a display 15, with which various inputs (transmitter setting, volume, muting received stations) and required information (operating state of the receiver, station set, traffic reports shown as text) can be given. The microprocessor 13 also has an output which is connected to a control input of the receiving part 2 so that the receiving part 2 can be set to 14 by hand or to transmitters stored in the microprocessor 13. The microprocessor 13 of the radio receiver is connected via a bidirectional data connection 10 to a navigation device which can also be controlled by a microprocessor, not shown. The information required for the route search or for adapting the route search to the respective course of the journey is taken from a mass storage device 18, for example a CD-ROM, and a GPS locating device 17. In addition to a digital road map, a section of which is shown in FIG. 2, there is a list in the mass memory 18 of those transmitters which broadcast digitally coded traffic reports (TMC messages). The list is arranged according to Pl codes and contains for each Pl code a reception area, a message area, frequencies on which programs are broadcast with the respective Pl code, and the other message selection carried out by the broadcaster - e.g. only local, regional and national reports.
Die in Fig. 3a) ausschnittsweise dargestellte Liste zeigt Einträge der fünf Sender Sa bis Se mit den Pl-Codes PI1 bis PI5. Die Empfangsbereiche der Sender Sa bis Se sind in Fig. 2 gleichlautend mit den Sendern dargestellt. Bei dem Ausführungsbeispiel ist die Datei dadurch besonders einfach aufgebaut, daß Gebiete der digitalen Karte (Fig. 2) in Bereiche - im folgenden auch PI-Bereiche genannt - unterteilt sind und daß für jeden dieser Bereiche die zuständigen Sender in der Liste gekennzeichnet sind. So geht aus der Liste nach Fig. 3a) beispielsweise hervor, daß der Sender Sa für den Bereich C2 Verkehrsmeldungen und der Sender Sb Verkehrsmeldungen für die Bereiche C1 , C2 und B2 ausstrahlt. Dadurch entfällt eine Zuordnung der Meldungsbereiche der einzelnen Sender zu den geographischen Koordinaten. Die Navigationseinrichtung 16 bestimmt auf der Basis der eigenen Position, in welchem PI-Bereich sich das Fahrzeug aufhält, und kann dann direkt zu dem entsprechenden Abschnitt der PI-Code-Tabelle springen, wo es dann einen oder mehrere Pl-Codes findet, beispielsweise in Fig. 3a) für den Bereich C2 die Pl-Codes PH bis PI4.The list shown in detail in FIG. 3a) shows entries of the five transmitters Sa to Se with the PI codes PI1 to PI5. The reception areas of the transmitters Sa to Se are shown in FIG. 2 in the same way as the transmitters. In the exemplary embodiment, the file is particularly simple in that areas of the digital map (FIG. 2) are subdivided into areas - also called PI areas in the following - and that the responsible transmitters are identified in the list for each of these areas. The list according to FIG. 3a) shows, for example, that the transmitter Sa transmits traffic reports for the area C2 and the transmitter Sb transmits traffic reports for the areas C1, C2 and B2. This eliminates the need to assign the message areas of the individual transmitters to the geographic coordinates. The navigation device 16 determines on the basis of its own position in which PI area the vehicle is located and can then jump directly to the corresponding section of the PI code table, where it then finds one or more PI codes, for example in 3a) for the area C2, the PI codes PH to PI4.
Sind mehrere Pl-Codes vorhanden, erfolgt zunächst eine Prüfung der Fahrtroute um zu bestimmen, welche Straßenklassen benutzt werden, ob es sich beispielsweise um Autobahnen oder innerstädtische Straßen handelt. Dieser Vorgang wird im folgenden anhand der Figuren 2 und 3 näher erläutert. Fig. 2 zeigt einen Ausschnitt von insgesamt 16 PI-Bereichen A1 bis D4 der digitalen Straßenkarte. Für eine Fahrt von einem Ort X zu einem Ort Y hat eine vorgenommene Routensuche ergeben, daß zunächst von X eine innerörtliche Straße 21 bis zu einer Autobahnanschlußstelle 22, dann eine Fahrt auf der Autobahn 23 bis zur Anschlußstelle 24 und schließlich wieder eine innerörtliche Straße 25 benutzt wird. Eine andere Straße 26, die ebenfalls von X nach Y führt, wird dem Fahrer nicht vorgeschlagen, da diese kurvenreiche Strecke länger ist und auch mehr Zeit beansprucht. Als Kreise bzw. Ellipsen sind die Empfangsbereiche der Sender Sa bis Se angedeutet. Fällt der größte Teil eines PI-Bereichs in den Empfangsbereich, ist dieser in der Tabelle nach Fig. 3a) bei dem jeweiligen Sender aufgeführt.If there are several PI codes, the route is first checked to determine which road classes are used, whether they are highways or inner-city roads, for example. This process is explained in more detail below with reference to FIGS. 2 and 3. 2 shows a section of a total of 16 PI areas A1 to D4 of the digital road map. For a journey from a location X to a location Y, a route search has shown that first of all an inner-city road 21 to an autobahn interchange 22, then a journey on the freeway 23 to the interchange 24 and finally an inter-urban road 25 are used again becomes. Another road 26, which also leads from X to Y, is not proposed to the driver, since this winding route is longer and also takes more time. The reception areas of the transmitters Sa to Se are indicated as circles or ellipses. If the largest part of a PI area falls within the reception area, this is listed in the table according to FIG. 3a) for the respective transmitter.
Die Sender Sa und Se sind lokale Sender, während die Sender Sb, Sc und Sd überregional empfangbar sind. Beim Start befindet sich der Empfänger im Gebiet C2. Nach der Liste sollten dort die Sender Sa bis Sd empfangbar sein. Da die erste Strecke 21 keine Autobahn ist, wird der lokale Sender Sa zunächst am höchsten priorisiert. Die restlichen Sender werden nach Auswertung der Empfangbarkeit in den anschließenden PI-Bereichen B2 und A2 bewertet. Da der Sender Sd in allen drei PI-Bereichen empfangbar ist, werden die Sender in der in Fig. 3b) dargestellten Reihenfolge Sa, Sd, Sb, Sc an den Mikroprozessor 13 des Rundfunkempfängers übergeben.The transmitters Sa and Se are local transmitters, while the transmitters Sb, Sc and Sd can be received nationwide. At the start, the receiver is in area C2. According to the list, the stations Sa to Sd should be receivable there. Since the first route 21 is not a freeway, the local transmitter Sa is first given the highest priority. The remaining stations are evaluated in the subsequent PI areas B2 and A2 after evaluating their reception. Since the Transmitter Sd can be received in all three PI areas, the transmitters are transferred to the microprocessor 13 of the radio receiver in the order Sa, Sd, Sb, Sc shown in FIG. 3b).
Schon vor Erreichen der Autobahn bei 22 sinkt das Verhältnis zwischen innerstädtischen bzw. lokalen Straßen 21 zur Autobahn 23 so stark, daß die Priorisierung des Senders Sa entfällt. Dadurch wird als nächstes der Sender Sd eingestellt, obwohl Sender Sb und Sender Sc eventuell höhere Feldstärken bieten. Der Sender Sd bleibt bis zum Übergang in den PI-Bereich A2 eingestellt. Dort stellt die Navigationseinrichtung fest, daß für die restliche Strecke wieder überwiegend Nebenstrecken benutzt werden, und priorisiert daher den für diesen PI-Bereich günstigsten Sender Se (Fig. 3c)), der dann bis zum Ziel Y eingestellt bleibt .Even before reaching the freeway at 22, the ratio between inner-city or local streets 21 to the freeway 23 drops so much that the prioritization of the transmitter Sa is omitted. This will set transmitter Sd next, although transmitters Sb and transmitter Sc may offer higher field strengths. The transmitter Sd remains set until the transition to the PI area A2. There, the navigation device determines that predominantly secondary routes are used for the remaining route, and therefore prioritizes the transmitter Se (FIG. 3c) which is cheapest for this PI area, which then remains tuned to the destination Y.
Fig. 4 zeigt als Flußdiagramm ein Programm, das in einem Mikroprozessor der Navigationseinrichtung zur Durchführung des erfindungsgemäßen Verfahrens vorgesehen ist. Nach einem Start bei 31 und Eingabe von X und Y bei 32 erfolgt bei 33 die Routenberechnung mit dem Ergebnis X, 22, 24, Y. Danach wartet das Programm auf eine Eingabe, ob eine dynamische Zielführung gewünscht wird. Ist dieses nicht der Fall, wird das Programm bei 35 beendet. Wird jedoch eine dynamische Zielführung erwünscht, erfolgt bei 36 die Bestimmung der PI-Bereiche, im vorliegenden Fall C2, B2 und A2.4 shows as a flow chart a program which is provided in a microprocessor of the navigation device for carrying out the method according to the invention. After starting at 31 and entering X and Y at 32, the route is calculated at 33 with the result X, 22, 24, Y. The program then waits for an entry as to whether dynamic route guidance is desired. If this is not the case, the program is ended at 35. However, if dynamic route guidance is desired, the PI areas are determined at 36, in the present case C2, B2 and A2.
Bei 37 werden dann anhand der Tabelle gemäß Fig. 3a zugehörige Pl-Codes ermittelt. Bei 38 verzweigt sich das Programm in Abhängigkeit davon, ob die Anzahl NPI der ermittelten Pl-Codes größer als Null ist. Ist zuvor kein passender Pl-Code gefunden worden, wird keine Liste an den Rundfunkempfänger übergeben. In diesem Fall muß der Rundfunkempfänger auf sich selbst gestellt - das heißt mit den bisher üblichen Verfahren - nach geeigneten Sendern mit Verkehrsmeldungen suchen.At 37, associated PI codes are then determined using the table in accordance with FIG. 3a. At 38, the program branches depending on whether the number of NPI of the PI codes determined is greater than zero. If no suitable PI code was found beforehand, no list is passed on to the radio receiver. In this case, the radio receiver must be on its own - that is, with the usual procedure - search for suitable stations with traffic reports.
Wurden jedoch Pl-Codes gefunden, folgt auf die Verzweigung 38 die Übergabe der PI-Liste (Fig. 3b)) an den Rundfunkempfänger. Bei 40 wird geprüft, ob das Ziel erreicht ist, und zutreffendenfalls das Programm bei 35 beendet. Solange das Ziel jedoch nicht erreicht ist, erfolgt bei 41 eine Aktualisierung der Position und damit auch der noch zurückzulegenden Route. Hierbei werden auch empfangene TMC-Meldungen berücksichtigt, so daß gegebenenfalls bei Verkehrsstörungen andere Routen gewählt werden. Ist der Empfänger durch die Fahrt auf der ursprünglich berechneten Route oder auf einer neu berechneten Route in einen neuen PI-Bereich gekommen, wird nach der Verzweigung 42 bei 36 erneut erfaßt, durch welche PI-Bereiche die weitere Fahrt geht, worauf bei 37 eine neue Bestimmung der zugehörigen Pl-Codes erfolgt. Solange der Empfänger bei 42 noch keinen neuen Bereich erreicht und auch das Ziel noch nicht erreicht ist, erfolgt bei 41 die Aktualisierung der Position und der Route, ohne daß es einer Neubestimmung der Pl-Codes bedarf. However, if PI codes were found, branch 38 is followed by the transfer of the PI list (FIG. 3b) to the radio receiver. At 40 it is checked whether the goal has been reached and, if applicable, the program ends at 35. However, as long as the destination has not been reached, the position and thus the route still to be traveled are updated at 41. Received TMC messages are also taken into account, so that other routes may be selected in the event of traffic disruptions. If the receiver has come into a new PI area due to the trip on the originally calculated route or on a newly calculated route, after branching 42 it is again detected at 36 which PI areas the further trip is going to be followed by a new one at 37 The associated PI codes are determined. As long as the receiver has not yet reached a new area at 42 and the destination has not yet been reached, the position and the route are updated at 41 without the PI codes having to be redetermined.

Claims

Ansprüche Expectations
1. Verfahren zur Selektion von mit mindestens einem mobilen Empfänger empfangbaren Verkehrsinformationsdiensten, die für eine von einer mit mindestens einem Empfänger verbundenen Navigationseinrichtung zuvor ermittelte Route relevant sind, dadurch gekennzeichnet, daß für die ermittelte Route aus einer gespeicherten Liste Diensteinformationen ausgelesen werden, welche die Dienste mit für die Route relevanten Verkehrsmeldungen kennzeichnen, daß im Falle von mehreren Diensten eine Tabelle erstellt wird, welche die ausgelesenen Diensteinformationen nach einer Bewertung sortiert enthält und welche bei der Verfolgung der Route veränderbar ist, und daß ein Empfänger jeweils auf den am höchsten bewerteten Dienst eingestellt wird .1. A method for selecting traffic information services which can be received with at least one mobile receiver and which are relevant for a route previously determined by a navigation device connected to at least one receiver, characterized in that service information which the services are read from a stored list for the determined route indicate with traffic announcements relevant to the route that, in the case of several services, a table is created which contains the service information read out sorted by an evaluation and which can be changed when the route is being followed, and that a receiver is set to the most highly rated service becomes .
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mindestens ein Empfänger ein Rundfunkempfänger zum Empfang von Sendern mit Verkehrsmeldungen ist, daß für die ermittelte Route aus einer gespeicherten Liste Programmidentifikations-Codes ausgelesen werden, welche Sender mit für die ermittelte Route relevanten Verkehrsmeldungen kennzeichnen, daß im Falle von mehreren ausgelesenen Programmidentifikations-Codes eine Tabelle erstellt wird, welche die ausgelesenen2. The method according to claim 1, characterized in that at least one receiver is a radio receiver for receiving transmitters with traffic reports, that program identification codes are read for the determined route from a stored list, which transmitters identify traffic messages relevant to the determined route, that in the case of several read program identification codes, a table is created which contains the read
Programmidentifikations-Codes nach einer Bewertung sortiert enthält und welche bei einer Verfolgung der Route veränderbar ist, und daß der Rundfunkempfänger jeweils auf den am höchsten bewerteten empfangbaren Sender eingestellt wird . Contains program identification codes sorted according to an evaluation and which can be changed when the route is being followed, and that the radio receiver is set in each case to the most highly rated receivable transmitter.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die gespeicherte Liste für die Programmidentifikations-Codes Informationen über das Empfangsgebiet, das von den Meldungsinhalten abgedeckte Gebiet (Meldungsgebiet), die bekannten Frequenzen und über eine vom Sender durchgeführte sonstige Meldungsselektion enthält.3. The method according to claim 2, characterized in that the stored list for the program identification codes contains information about the reception area, the area covered by the message content (message area), the known frequencies and a message selection carried out by the transmitter.
4. Verfahren nach einem der Ansprüche 2 oder 3 , dadurch gekennzeichnet, daß die Tabelle der einzustellenden Sender durch Vergleich von Positionen auf der Route mit Gebietsangaben in der Liste ermittelt und aktualisiert wird.4. The method according to any one of claims 2 or 3, characterized in that the table of the stations to be set is determined and updated by comparing positions on the route with area information in the list.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Eintragungen in der so ermittelten Tabelle derart sortiert werden, daß Sender mit am besten passenden Meldungsinhalten an oberster Stelle stehen.5. The method according to claim 4, characterized in that the entries in the table thus determined are sorted in such a way that transmitters with the most suitable message contents are at the top.
6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die sortierte Tabelle an eine Steuereinrichtung des Rundfunkempfängers übergeben wird und dort als Basis für eine Sendersuche dient, wobei der an der obersten Stelle stehende Sender zuerst gesucht wird.6. The method according to claim 5, characterized in that the sorted table is passed to a control device of the radio receiver and is used there as the basis for a station search, the station at the top being searched for first.
7. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß bei der Sortierung die jeweilige Klasse der zu befahrenden Straßen in Relation zu der sonstigen Meldungsselektion des Senders steht, welche die Straßenklassen kennzeichnet, für welche der jeweilige Sender Verkehrsmeldungen sendet.7. The method according to claim 5, characterized in that the sorting of the respective class of roads to be driven is in relation to the other message selection of the transmitter, which identifies the road classes for which the respective transmitter sends traffic reports.
8. Verfahren nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß in der Liste zu geographischen Gebieten, in welche eine digitale Straßenkarte für die Navigationseinrichtung aufgeteilt ist, die zugehörigen Programmidentifikations-Codes aufgeführt sind und daß bei einer Verfolgung der Route gebietsweise die Programmidentifikations-Codes ausgelesen und sortiert werden .8. The method according to any one of claims 2 or 3, characterized in that in the list of geographic areas, in which a digital road map is divided for the navigation device, the associated program identification codes are listed and that when the route is tracked regionally Program identification codes can be read out and sorted.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß bei der Sortierung die jeweilige Klasse der zu befahrenden Straßen in Relation zu der sonstigen Meldungsselektion des Senders steht, welche die Größe des Gebiets bezeichnet, für welche der jeweilige Sender Verkehrsmeldungen sendet, und daß bei verschiedenen Straßenklassen innerhalb eines Gebiets diejenige zur Sortierung verwendet wird, welche innerhalb des Gebiets überwiegt.9. The method according to claim 8, characterized in that the sorting of the respective class of the roads to be traveled is in relation to the other message selection of the transmitter, which denotes the size of the area for which the respective transmitter sends traffic reports, and that at different Road classes within an area that are used for sorting that predominate within the area.
10. Anordnung zur Durchführung des erfindungsgemäßen Verfahrens, dadurch gekennzeichnet, daß die Liste auf dem selben Datenträger gespeichert ist wie eine digitale Straßenkarte, vorzugsweise auf einer optisch abtastbaren Scheibe (CD-ROM) .10. Arrangement for performing the method according to the invention, characterized in that the list is stored on the same data carrier as a digital road map, preferably on an optically scannable disc (CD-ROM).
11. Anordnung zur Durchführung des erfindungsgemäßen Verfahrens, dadurch gekennzeichnet, daß der Rundfunkempfänger zwei unabhängig voneinander einstellbare Empfangsteile aufweist. 11. Arrangement for performing the method according to the invention, characterized in that the radio receiver has two independently adjustable receiving parts.
EP00956071A 1999-07-31 2000-07-06 Method and array for selecting traffic information services that can be received with at least one mobile receiver Expired - Lifetime EP1118068B1 (en)

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