EP3439206B1 - Anzeige länderabhängiger geschwindigkeitsbeschränkungen - Google Patents

Anzeige länderabhängiger geschwindigkeitsbeschränkungen Download PDF

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Publication number
EP3439206B1
EP3439206B1 EP17184250.3A EP17184250A EP3439206B1 EP 3439206 B1 EP3439206 B1 EP 3439206B1 EP 17184250 A EP17184250 A EP 17184250A EP 3439206 B1 EP3439206 B1 EP 3439206B1
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EP
European Patent Office
Prior art keywords
country
speed limits
radio
determining
codes
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Active
Application number
EP17184250.3A
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English (en)
French (fr)
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EP3439206A1 (de
Inventor
Philipp Schmauderer
Christoph Benz
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Harman Becker Automotive Systems GmbH
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Harman Becker Automotive Systems GmbH
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Priority to EP17184250.3A priority Critical patent/EP3439206B1/de
Publication of EP3439206A1 publication Critical patent/EP3439206A1/de
Application granted granted Critical
Publication of EP3439206B1 publication Critical patent/EP3439206B1/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/49—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations
    • H04H60/51—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations of receiving stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H04H60/43—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]

Definitions

  • the present invention relates to a method and an apparatus for informing the driver of a vehicle on general speed limits that are to be observed in a country in that the driver is driving the vehicle.
  • General speed limits are hold for different classes (categories) of roads and streets and in different kinds of towns/villages in different countries or states.
  • General (permanent) speed limits have to be distinguished from temporary speed limits that are indicated on particular traffic signs. For example, in Europe borders of different countries may frequently be passed during one single trip. Since the speed limits heavily differ from one country to another a driver must be informed on the relevant speed limits. Usually, at a border between one country and another, the valid speed limits are shown on particular designed signs. However, usually the general speed limits that are valid in a country are only shown once, namely, at or close to the border. Once the driver has passed the border he may forget the information about the general speed limit presented at the border or the driver may have overseen it at all.
  • Document WO 00/05091 A1 discloses a vehicle behaviour modification method that determines the position of a vehicle and outputs positional information to vehicle systems in order to modify their behaviour (e.g. speed may automatically be set according to detected country and road type limits).
  • the position determining means comprises at least one receiver responsive to transmitted signals and processing means for processing the at least one signal in order to determine the vehicle's position.
  • the receiver may scan the local FM broadcast band or digital audio broadcasts in order to determine the data signals piggybacked onto the broadcast transmissions, for example RDS signals and then access a database to identify in which country each identified station transmits from.
  • Document DE 19802594 A1 discloses a method for controlling operation of a motor vehicle depending on the country the vehicle is travelling in as determined from a PI code of an RDS signal. Control signals, including speed control signals, are output based on the determined country.
  • the present invention addresses the above-mentioned object and provides a method of outputting general speed limits in a vehicle (in which, in particular, no navigation system is installed), comprising the steps of
  • the radio receiver is an RDS (Radio Data System) radio receiver (different from any navigation system) for receiving radio signals and playing back the content transmitted by radio stations, in particular, VHF (FM) radio stations or radio stations transmitting according to the North American radio broadcast data system (RBDS) standard (also referred to as NRSC-4).
  • RDS Radio Data System
  • FM FM
  • RBDS North American radio broadcast data system
  • the structure of a PI code in Europe is defined in the standard EN 50067.
  • a PI code is a 16 bit code wherein the country of the sending radio station is encoded at the first position (nibble) of the code. The second position represents an area code.
  • the outputting of the general speed limits may be performed automatically upon determination of the country or it may be performed in response to a corresponding input (speech input or manual input, for example) received from the driver of the vehicle.
  • the user/driver is reliably provided with information on general (permanent) speed limits that are valid in the country in which he/she is driving the vehicle, particularly, in a case in that the vehicle is not equipped with a navigation system.
  • the general speed limits may comprise speed limits of different classes/categories of roads and streets and/or towns and villages.
  • Information on the countries and the speed limits may be stored in a database and the step of determining the country may comprise looking-up the country and/or determining the general speed limits in a look-up table stored in a database and determining the general speed limits may comprise looking-up the general speed limits in a look-up table stored in a database, for example the look-up table stored in the database.
  • each country may be associated with a particular code that is also included in the PI codes at the first positions of the same.
  • the general speed limits may be associated with the determined countries in the look-up table.
  • general speed limits may be associated with the first nibbles of the PI codes directly that are decoded based on information that is not stored in the look-up table.
  • the radio receiver may comprise a suitably configured decoder for decoding the PI codes and, thereby, determining the country.
  • the step of determining the country is based on a statistic of the PI codes of the received radio signals. If the vehicle is driving close to a border between two countries it may happen that multiple radio signals transmitted from radio stations on both sides of the border are received by the radio receiver. In this case, the determination of the country the vehicle is driving in can be performed based on some appropriate statistical measure(s), e.g., a mean value or a standard deviation of the received PI codes.
  • speed limits associated with more than one country may be output to user. If, for example, within some standard deviation as many radio signals are received from one country as from another country the speed limits of these two countries may be output. In the case that speed limits of more than one country are output it can also be output that the driver is driving close to a boundary of two or more countries. Alternatively, the more restrictive ones of the speed limits associated with the more than country might be output.
  • radio signals including the PI codes are received from multiple radio stations and the step of determining the country is based on (reception) strengths of radio signals including the PI codes.
  • reception of the radio signals from multiple radio stations content stemming from one radio station only may be played back by the radio receiver.
  • Statistic measures of the strengths of the radio signals may be calculated and used when determining the country.
  • radio signals of (significantly) different strengths are received, one or more of the radio signals with the highest strengths only may be used for determining the country.
  • the relatively low number (or even only one) radio signals indicating the second country may be chosen for determining the country.
  • the country may be determined based on the first (second) PI code, if the strengths of the radio signals including the first PI code are higher (lower) than the strengths of the radio signals including the second PI code. Again, if there is no unique determination of a country possible (based on the statistics and strengths of the received radio signals), speed limits of more than one country may be output.
  • determining of the country is based on a change of PI codes occurring during reception of radio signals from a single radio station with constant reception frequency. Such a situation may occur when the vehicle passes a border while travelling in a tunnel connecting respective parts of a first and a second country close to the border.
  • a computer program product comprising one or more computer readable media having computer-executable instructions for performing one or more of the steps of the method according to one of the above-described examples.
  • an apparatus installed in a vehicle in particular, an automobile (particularly, not being equipped with a navigation system), comprising
  • the output means may comprise a display, for example, a display of the radio receiver and/or a loudspeaker, for example, a loudspeaker of the radio receiver. At least one of the output means and the processor may be part of the apparatus.
  • the apparatus may further comprise a database and the processor may be configured for determining the country by looking-up the country and/or the general speed limits in a look-up table stored in the database.
  • the radio receiver is configured for receiving radio signals including the PI codes from multiple radio stations and the processor is configured for determining the country based on a statistic of the PI codes of the received radio signals.
  • the processor may be configured for determining strengths of radio signals received by the radio receiver and including the PI codes and it may be configured for determining the country based on the determined strengths of the radio signals.
  • the processor is configured for determining the country based on a change of PI codes occurring during reception of radio signals from a single radio station with constant reception frequency by the radio receiver.
  • FIG 1 shows a radio broadcast network 100 including radio stations 101, 102 and 103 for transmitting radio signals.
  • the radio transmission broadcasts are typically transmitted as stereo-multiplex signals in the FM frequency band.
  • Radio data system (RDS) data can be broadcast by the radio stations 101, 102 and 103, to display information relating to the radio broadcast. For example, the station name, song title, and/or artist can be included in the RDS data.
  • the radio signals include PI codes indicating the country of the radio station.
  • the RDS standard is defined in the European Committee for Electrotechnical Standardization, EN 50067 standard.
  • Another exemplary utilization of the RDS data of this disclosure is represented by the North American radio broadcast data system (RBDS) standard (also referred to as NRSC-4).
  • RBDS North American radio broadcast data system
  • a radio receiver 104 that is installed in a vehicle 105 receives the radio signals / RDS data.
  • the radio receiver 104 comprises a data processor 201 for determining a country based on the (first nibble) of the PI codes of the received radio signals as shown in Figure 2 .
  • the radio receiver 104 comprises a database 202 and an antenna unit 203 for receiving the radio signals.
  • data associating the first nibble of the PI codes of the radio signals and countries is provided.
  • the data processor 201 determines the first nibble of the PI codes of the radio signals received by means of the antenna unit 203 and determines the corresponding country based on the data stored in the database 202.
  • the data processor 201 looks-up the country for a determined first nibble of a PI code of a received radio signal in a look-up table stored in the database 202.
  • the database 201 is part of the radio receiver 104, alternatively, the database 102 may be provided separately of and in data connection with the radio receiver 104.
  • the data processor 201 determines general speed limits that are valid in the determined country. Determination of the speed limits may also be performed by means of a look-up table, for example, the above-mentioned look-up table. Alternatively, the country may be determined based on the first nibble of the PI code based on information stored in an internal memory of the data processor 201 or the radio receiver 104 and the general speed limits only are retrieved by looking-up a look-up table stored in the database 202.
  • the general speed limits may comprise speed limits of different classes/categories of roads and streets and/or towns and villages, for example, highways/motorways, national highways, country roads, built-up areas, etc.
  • the determined general speed limits may be output visually or acoustically either automatically upon determination of the country/general speed limits or in response to a user request made manually or verbally by a driver of the vehicle 105.
  • the relevant speed limits can be displayed on a display 204 of the radio receiver 104.
  • a warning may be output when the vehicle 105 travels with a velocity that exceeds one of the determined general speed limits, for example, the highest one of the determined general speed limits.
  • FIG. 3 shows an embodiment of a radio receiver 300 for receiving and processing radio signals and for decoding and further processing RDS data in some more detail.
  • the RDS data may be RDS-TMC data and may comprise traffic announcements, data about alternative frequencies of the tuned transmitter, etc.
  • the radio signals include PI codes.
  • the first nibble represents a country code, for example, "D" for Germany and "F” for France.
  • the radio receiver 300 comprises an antenna 301 for receiving a radio signal.
  • the received radio signal is transmitted via a tuner 302 and an Intermediate Frequency stage 303 to a stereo decoder 304 and an RDS decoder 305.
  • the tuner 302 is controlled by a tuning circuit 306 which is set by a control circuit 307 that is connected to a control device 308 by which a user may make user inputs.
  • the control circuit 307 is, for example, a processing circuit with peripheral circuits (not shown in Figure 2 ).
  • the stereo decoder 304 produces low-frequency stereo signals which are supplied via an audio amplifier 309 to two loudspeakers 310 and 311.
  • the RDS decoder 305 extracts RDS-TMC (Traffic Message Channel) data from the low-frequency signal produced by the Intermediate Frequency stage 303.
  • the RDS-TMC data and, further, a clock signal are delivered to the control circuit 307 by the RDS decoder 305.
  • a memory 312, a display 313 and a speech synthesizer circuit 314 are provided.
  • a CD drive (not shown in Figure 3 ), a car telephone (not shown in Figure 3 ), etc. may, additionally, be coupled to the control circuit 307.
  • the RDS decoder 305 is configured to decode RDS data, particularly, the PI code.
  • the control circuit 306 is configured to determine a country in which the vehicle is driving based on the (first nibble of) the Programme Identification, PI, codes and to determine and output, for example, via the display 313 or (via the speech synthesizer circuit 314 and the audio amplifier 309) the loudspeakers 310 and 311, the general speed limits that are valid in the determined country.
  • the general speed limits are determined based on data (providing associations between the country that is determined based on the PI code and the general speed limits) and stored in the memory 312 or another database (not shown).
  • a method of outputting general speed limits in a vehicle comprises the step of receiving 401 by a radio receiver installed in a vehicle a radio signal from a radio station (see Figure 4 ).
  • the radio signal transports RDS content and includes a PI code wherein the country of the radio station is encoded in the first nibble.
  • the first nibble of the radio signal is determined 402 upon reception of the radio signal in order to determine the country.
  • general speed limits that are valid in the country are determined.
  • the general speed limits may be looked up in a database installed in the vehicle and associating general speed limits with countries wherein the particular general speed limits are valid.
  • the general speed limits that are determined based on the determined country are output 404 to a driver of a vehicle, for example, by means of a display or a loudspeaker installed in the vehicle. If, for example, the country is determined to be Austria, the output of the general speed limits comprises indications that in built-up areas a passenger car may not travel faster than 50 km/h, on a national highway a passenger car may not travel faster than 100 km/h and on a highway/motorway a passenger car may not travel faster than 130 km/h, etc.
  • the information on the general speed limits may be restricted to general speed limits for the kind of vehicle involved.
  • FIG. 5 Another embodiment of a method of outputting general speed limits in a vehicle is illustrated in Figure 5 .
  • a plurality of radio signals is received 501 by a radio receiver installed in a vehicle from multiple radio stations.
  • the radio signals transport RDS content and include PI codes wherein the countries of the radio stations are encoded in the respective first nibbles of the PI codes.
  • the country associated with each of the radio signals/stations is determined 502 based on the PI codes. Determination may be performed by a suitably configured decoder or by looking-up a database associating PI codes with countries.
  • a statistic is calculated 503 for the determined countries and based on the calculated statistics general speed limits are determined 504.
  • the thus determined general speed limits are output 505 to a user, for example, by means of a display or a loudspeaker installed in the vehicle.
  • radio signals from n radio stations of m countries are received.
  • the country will be determined to be the one in which the vehicle is travelling from which the most radio signals are received. If, for example, most of the radio signals are received from two of the m countries and a comparable number of radio signals are received from these two countries the country might be determined to be the one in which the vehicle is travelling from which the most different radio stations are sending the received radio signals. If, for example, the most radio signals are received from one radio station of one of the m countries but a relatively high number of radio signals is received from a relatively high number of the n radio stations of another one of the m countries is received, then, the other one of the m countries might be determined to be the one in which the vehicle is travelling. Any radio signals received with a frequency below a particular threshold may be disregarded when determining the country the vehicle is travelling in.
  • a plurality of radio signals is received 601 by a radio receiver installed in a vehicle from multiple radio stations.
  • the radio signals transport RDS content and include PI codes wherein the countries of the radio stations are encoded in the respective first nibbles of the PI codes.
  • the country associated with each of the radio signals/stations is determined 602 based on the PI codes. Determination may be performed by a suitably configured decoder or by looking-up a database associating PI codes with countries.
  • the strengths of the received radio signals are determined 603.
  • the determining of the countries 602 may automatically be done by decoding of the PI codes. Alternatively, the determining of the countries 602 might only be done for radio signals with signal strengths exceeding a particular threshold. In this case, step 603 is to be performed before step 602.
  • step 603 is to be performed before step 602.
  • Based on the determined signal strengths general speed limits are determined and output 604 that are associated with a particular country that is determined based in the signal strengths of the radio signals. In the embodiment illustrated in Figure 6 the country associated with radio signals of highest signal strengths is determined to be the one in which the vehicle is travelling and, therefore, the general speed limits associated with that country are output in step 604.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Navigation (AREA)
  • Traffic Control Systems (AREA)
  • Circuits Of Receivers In General (AREA)

Claims (10)

  1. Verfahren zum Ausgeben allgemeiner Geschwindigkeitsbeschränkungen in einem Fahrzeug, Folgendes umfassend:
    Empfangen von Funksignalen einschließlich Programmidentifikations(PI)-Codes von mehreren Funkstationen mittels eines im Fahrzeug installierten Funkempfängers;
    Bestimmen eines Landes, in dem das Fahrzeug fährt, basierend auf den empfangenen PI-Codes; und
    Bestimmen und Ausgeben der allgemeinen Geschwindigkeitsbeschränkungen, die in dem bestimmten Land gültig sind; und wobei
    das Verfahren dadurch gekennzeichnet ist, dass das Bestimmen des Landes entweder auf a) statistischen Messungen der PI-Codes der von den mehreren Funkstationen empfangenen Funksignale oder auf b) Stärken der Funksignale, die die durch den Funkempfänger empfangenen PI-Codes beinhalten, basiert.
  2. Verfahren nach Anspruch 1, wobei die allgemeinen Geschwindigkeitsbeschränkungen Geschwindigkeitsbeschränkungen verschiedener Klassen von Wegen und Straßen und/oder Städten und Dörfern umfassen.
  3. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Bestimmen des Landes und/oder das Bestimmen der allgemeinen Geschwindigkeitsbeschränkungen das Nachschlagen des Landes und/oder der allgemeinen Geschwindigkeitsbeschränkungen in einer in einer Datenbank gespeicherten Nachschlagetabelle umfasst.
  4. Verfahren nach einem der Ansprüche 1 bis 3, wobei das Bestimmen des Landes auf einer Änderung von PI-Codes basiert, die während des Empfangs von Funksignalen von einer einzelnen Funkstation mit konstanter Empfangsfrequenz auftritt.
  5. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Ausgeben der allgemeinen Geschwindigkeitsbeschränkungen das Anzeigen der allgemeinen Geschwindigkeitsbeschränkungen auf einer Anzeigeeinrichtung des Funkempfängers umfasst.
  6. Computerprogramm, umfassend Anweisungen, die, wenn das Programm durch einen Computer ausgeführt wird, den Computer veranlassen, die Schritte des Verfahrens nach einem der Ansprüche 1-5 auszuführen.
  7. Vorrichtung, die in einem Fahrzeug, insbesondere einem Automobil, installiert ist, Folgendes umfassend:
    einen Funkempfänger, der für das Empfangen von Funksignalen von mehreren Funkstationen konfiguriert ist, wobei die Funksignale Programmidentifikations(PI)-Codes beinhalten;
    einen Prozessor, der konfiguriert ist, um ein Land zu bestimmen, in dem das Fahrzeug basierend auf den empfangenen PI-Codes fährt, und um allgemeine Geschwindigkeitsbeschränkungen zu bestimmen, die in dem bestimmten Land gültig sind; und
    Ausgabemittel, die durch den Prozessor gesteuert werden und zum Ausgeben der bestimmten allgemeinen Geschwindigkeitsbeschränkungen konfiguriert sind; und wobei
    die Vorrichtung dadurch gekennzeichnet ist, dass der Prozessor entweder a) zum Bestimmen des Landes basierend auf statistischen Messungen der PI-Codes der von den mehreren Funkstationen empfangenen Funksignale oder b) zum Bestimmen der Stärken der Funksignale beinhaltend die PI-Codes und zum Bestimmen des Landes basierend auf den Stärken der Funksignale konfiguriert ist.
  8. Vorrichtung nach Anspruch 7, wobei die allgemeinen Geschwindigkeitsbeschränkungen Geschwindigkeitsbeschränkungen verschiedener Klassen von Wegen und Straßen und/oder Städten und Dörfern umfassen.
  9. Vorrichtung nach Anspruch 7 oder 8, ferner umfassend eine Datenbank und wobei der Prozessor zum Bestimmen des Landes und/oder zum Bestimmen der allgemeinen Geschwindigkeitsbeschränkungen durch Nachschlagen des Landes und/oder der allgemeinen Geschwindigkeitsbeschränkungen in einer in der Datenbank gespeicherten Nachschlagetabelle konfiguriert ist.
  10. Vorrichtung nach einem der Ansprüche 7 bis 9, wobei der Prozessor zum Bestimmen des Landes basierend auf einer Änderung von PI-Codes konfiguriert ist, die während des Empfangs von Funksignalen von einer einzelnen Funkstation mit konstanter Empfangsfrequenz durch den Funkempfänger auftritt.
EP17184250.3A 2017-08-01 2017-08-01 Anzeige länderabhängiger geschwindigkeitsbeschränkungen Active EP3439206B1 (de)

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EP3439206B1 true EP3439206B1 (de) 2021-12-15

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000005091A1 (en) * 1998-07-24 2000-02-03 Lucas Industries Plc Apparatus for modifying the operation of a vehicle based on the vehicle's position

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802594B4 (de) * 1998-01-23 2006-04-13 Volkswagen Ag Verfahren zum Steuern von Einrichtungen eines Kraftfahrzeuges

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000005091A1 (en) * 1998-07-24 2000-02-03 Lucas Industries Plc Apparatus for modifying the operation of a vehicle based on the vehicle's position

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