EP0762679A1 - Method and means for determining the location of a broadcast receiver - Google Patents

Method and means for determining the location of a broadcast receiver Download PDF

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Publication number
EP0762679A1
EP0762679A1 EP95114082A EP95114082A EP0762679A1 EP 0762679 A1 EP0762679 A1 EP 0762679A1 EP 95114082 A EP95114082 A EP 95114082A EP 95114082 A EP95114082 A EP 95114082A EP 0762679 A1 EP0762679 A1 EP 0762679A1
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EP
European Patent Office
Prior art keywords
transmitter
received
receiver
frequencies
areas
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.)
Ceased
Application number
EP95114082A
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German (de)
French (fr)
Inventor
Stefan Lau
Dietmar Dipl.-Ing. Kell (Fh)
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP95114082A priority Critical patent/EP0762679A1/en
Publication of EP0762679A1 publication Critical patent/EP0762679A1/en
Ceased legal-status Critical Current

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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
    • H04H60/37—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 segments of broadcast information, e.g. scenes or extracting programme ID
    • 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
    • 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]
    • 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
    • H04H60/53—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 destinations

Definitions

  • the invention relates to a method for determining the location of a radio receiver and a radio receiver according to the type of the main claims.
  • a radio receiver has already become known from WO91 / 07029, by means of which it is possible to determine the region in which the radio receiver is located.
  • the reception frequency band is searched and all radio stations that can be received in this frequency band are recorded.
  • the region in which the radio receiver is located On the basis of the radio stations received, their identification and their frequency, it is concluded that the region in which the radio receiver is located. This conclusion is made by a comparison with receivable transmitters and their frequencies, which are stored in a memory of the radio receiver. If a radio band is now relatively busy, it takes a certain amount of time until all of the radio stations have been recorded and evaluated. This time can be perceived as disturbing.
  • the method according to the invention and the device according to the invention with the features of the main claims has the advantage that the location of the receiver may already be possible by evaluating a single frequency, possibly with the aid of a few further frequencies. This enables the location of the radio receiver to be determined very quickly, so that any interruptions in the radio program which may be necessary for this are very short and are hardly perceived by the radio listener.
  • switched further frequencies which are not or only insufficiently received, are stored in a buffer and are queried again if no clear large area has been determined by means of the received frequencies and their transmitter identification. This makes it possible to evaluate frequencies that cannot be received for a short time due to shadowing, for example. These frequencies are therefore not lost for the location evaluation. Furthermore, it is advantageous to store switched further frequencies that are received with a field strength that exceed a predetermined value in a receive buffer. This makes it possible to determine the large area in a particularly simple manner, since only the reception buffer result has to be compared with the memory contents in order to arrive at one or more large areas in which the radio receiver is located.
  • This also makes it easy to check whether the radio receiver is still in the large area that was originally determined.
  • By checking only the frequencies stored in the reception buffer it is namely possible to quickly determine whether a moving radio receiver, for example a car radio, has already left a certain large area or is still in the same.
  • the transmitter category of the transmitter in the large-capacity memory, which makes it possible to select the relevant frequencies intelligently by first selecting frequencies with a large area coverage / reception probability of the relevant large areas.
  • the finest location resolution has been reached.
  • the buffer of the non-buffer is also favorable delete received stations and determine a new selection of the frequencies to be switched with regard to the newly selected large areas. It is also advantageous to evaluate the PI code of the frequency set by the control unit in order to obtain a rough preselection of the relevant large areas.
  • FIG. 1 shows the division into large traffic areas and into transmitter classes
  • FIG. 2 shows a radio receiver according to the invention
  • FIGS. 3 and 4 show structure diagrams of a program for the system unit.
  • FIG. 1 shows various large traffic areas VK_GR1 to VK_GR5 of a specific area. In the exemplary embodiment, it is part of the center of the Federal Republic of Germany, which is determined by the areas between Aachen and Hanover in east-west expansion and Osnabrück to Siegen in a north-south orientation.
  • the traffic areas VK_GR cover an area with a diameter of approx. 30 to 50 km. They are freely defined in terms of the density of messages, for example traffic reports and existing transmitter structures, which determine the resolution of the area.
  • FIG. 1 also shows various transmitters which are assigned to different classes. Class 0 transmitters are represented by dashed circles, such as the spreading area of transmitter 11, which is located approximately in Bielefeld.
  • Checkout 0 transmitters are transmitters that have a high transmission power and on the other hand have a large transmission range.
  • Class 1 transmitters shown in dash-dotted lines, such as transmitter 12, on the other hand, have a lower transmission power and a shorter range.
  • Class 2 transmitters for example transmitter 13, are transmitters of lower power which are mainly used for serving local areas. As a result, they have a limited reach.
  • the distribution area cannot be precisely defined, since, for example, overreach, these transmitters can have a distribution that goes far beyond the distribution, which is shown in broken lines for example at the transmitter 11. These ranges are dependent on weather conditions and can therefore hardly be influenced.
  • Category 0 transmitters are characterized by the fact that they cover the traffic area almost completely.
  • the larger traffic area 3 is also still touched by the transmitter 11, but since this is only a small area, it has category 3 in the larger traffic area 3 on.
  • the transmitter 13 can, for example, only be received in the large traffic area 5. However, it does not cover the entire large traffic area there, but only a part, so that the transmitter 13 is assigned to category 2.
  • the transmitter 12 also only partially covers the large traffic area 5, so that category 2 is granted to it there. To a small extent, it can also be received in the large traffic area 1, so that it is in the Large traffic area 1 is rated with category 3, since it covers only a very small sub-area of large traffic area 1.
  • Figure 1 shows the typical transmitter distribution in a certain area.
  • the transmitters work on different frequencies so that interference between the transmitters is excluded. However, it is possible for local transmitters to operate on the same frequency if it is ensured that the local transmitters are so far apart that there is no mutual interference between the transmitters. The same can of course also be found for class 0 transmitters, if only it is ensured that the area is so large that transmitters of the top class do not interfere with each other. For example, it is perfectly possible to use the same frequency in Northern Germany and Bavaria to transmit stations that have a large spread in the FM range, since usually North German transmitters on FM cannot be received in southern Germany and vice versa.
  • Each transmitter also digitally transmits a transmitter identifier that allows the transmitter to be clearly identified.
  • RDS information according to the radio data system, under which a so-called PI code is also transmitted, which enables clear station identification.
  • the PI code contains information about the country in which the station is located and an individual number for each program that the station broadcasts. For example, if the PI code of a transmitter is NDR3 (Nord Wegr Rundfunk 3), it can easily be ascertained that the radio receiver is located in northern Germany and not in southern Germany.
  • the radio receiver is shown in more detail in Figure 2. With 1 the tuner and IF part of the radio receiver is designated.
  • the tuner 1 is in with the system unit 5 in Connection.
  • the received signal is transmitted from the tuner 1 to the system unit 5.
  • the frequencies to be switched on are specified to the tuner 1 by the system unit 5.
  • an RDS demodulator 2 is provided with which it is possible to evaluate and break down the RDS information received by the tuner.
  • the system unit 5 provides the digitally received data to the RDS demodulator 2 for evaluation.
  • the RDS demodulator in particular determines the PI code and reports it back to the system unit 5.
  • the system unit 5 can be operated by an operating unit 3.
  • this control unit 3 can be used to switch the device on and off and to indicate the direction of travel, for example in the form of cardinal points. This facilitates the later selection of large traffic areas.
  • the system unit 5 addresses a large traffic storage area 4. Subdivided into major traffic areas 1 to n, the information is stored in this memory 4 as to which frequencies are occupied by transmitters, for example in major traffic area 1, which PI code these transmitters have and to which class and to which category they relate to this major area.
  • a memory 6 is present in the radio receiver, which enumerates the neighboring large traffic areas for predetermined large traffic areas. For example, the main traffic areas 1 are adjacent to the main traffic areas 2, 3 and 5.
  • the radio receiver also has buffers 7, 8 and 9, which are managed by the system unit.
  • Buffer 7 contains the number of transmitters that actually have to be receivable in a particular large traffic area, but were not received. These are stored in buffer 7 by frequency and category.
  • the system unit 5 sets a frequency in the tuner 1 that should be receivable in the large traffic area 1 and is not received, the information required for this is stored in the buffer 7.
  • the transmitters that are received are stored in buffer 8.
  • the associated frequency and the category are stored in the reception buffer 8.
  • the large traffic areas that can be assigned on the basis of the received stations are stored in the buffer 9. If the number of large traffic areas stored in the buffer 9 is 1, or if a frequency of the highest category, in the exemplary embodiment 3, has been evaluated, the search is ended since the finest resolution of the radio receiver with regard to its large traffic areas has now been reached.
  • the structograms being convertible into programs which are stored in the system unit 5 and processed with regard to the location of the radio receiver. If the radio receiver is switched on, it will either be set to a certain frequency and play the program that is being transmitted on this frequency or start a station search and bring the next receivable station to the operator of the radio device. This frequency f 0 is from of the system unit 5 at point 20. At the same time, the RDS demodulator 2 evaluates the received signal and determines the PI code which it receives at the frequency f 0 . This information is also made available by the RDS decoder 2 to the system unit 5.
  • the system unit 5 calls the memory 4, in which all frequencies, the associated PI code and the class are stored, sorted by large traffic areas.
  • the entire memory is searched and the large traffic areas are determined which contain the set frequency f 0 and the PI code determined by the RDS demodulator 2.
  • These large traffic areas are stored at point 34 in buffer 9 both in terms of numbers and in relation to the greater area.
  • the received frequency and the category are written into the buffer 8, the lowest category being selected which occurs in the memory 4 in accordance with the PI code and frequency.
  • This next frequency is selected by taking a frequency of the same category as that of the transmitter received on frequency f 0 , but which can be received in fewer large areas than were selected. There is no frequency in this category that is a decrease which would result in large areas, the lists of the identified large traffic areas are searched for frequencies of the next higher category.
  • any measure is suitable for reducing the large traffic areas by means of which it is possible to reduce the number of large traffic areas stored in the memory 9. If, for example, three large rooms are stored, it is possible to select a frequency which can only be received in two large rooms, but not in the third large room. This could also lead to a further reduction in the large areas. If the tuner is set to frequency f 1 , then the transmitter received there is checked at point 24 at this frequency f 1 . At point 25 there is now a query as to whether the transmitter is received on frequency f 1 with the necessary field strength.
  • the corresponding frequency and the associated class are written into the memory 7 of the radio receiver at the point 26 and jumped to the point 30. If a signal with a minimum field strength was received on this transmission frequency, this frequency is written with its class into the buffer of the received transmitter 8 and the buffer 7 of the non-receivable transmitter is deleted, which is effected at point 27. A comparison is now made at point 28 with the frequency f 1 as at point 22. In this case, only the large traffic areas that are stored in the memory 9 are searched for. If this results in the fact that only one large traffic area is possible here, then this large traffic area is defined at point 29 as the area in which the radio receiver is located and which leaves the program.
  • the category of the station is checked and then the program If the highest category is present, the process jumps to point 30, where a query takes place as to whether all the frequencies of the large traffic areas stored in the memory 9, which lead to a reduction in the large traffic areas, have already been processed. If this is not the case, the system jumps back to point 24 and calls the next frequency f 2 .
  • Frequencies are then checked in rapid succession according to a predetermined selection procedure, which limit the area. This routine continues until a single large traffic area remains, which is then considered the location of the receiver, or the last received frequency contains the highest available category (finest resolution). If all available frequencies have been run through, which is determined at point 30 and a large traffic area is still not clearly identified, the program reaches point 31, where the state of the memory 7 is checked. If frequencies not yet receivable are stored in the memory 7, these are read out from the memory 7 at the point 32 in sequence and checked in the manner described above. As a result, those frequencies can also be used for evaluation that could not be received for a short time due to shadowing or interference, for example.
  • the method presented enables the location of the vehicle to be reached, usually with very few identification steps, in the best case with a single frequency.
  • the search for the location of the radio receiver is therefore very quick.
  • FIG. 4 shows the case which leads to a repetition of the location check. If the radio receiver is moved, it cannot be assumed that the location once determined will be retained.
  • the criterion for determining a new location can either be the time, that is to say that the location is checked at regular intervals in accordance with the diagram according to FIG. 3, or else, as in FIG. 4, it can be checked at point 40 whether the received location Frequency f a , which has led to the best location result, falls below a certain level. If this is the case, it is assumed that the radio receiver has moved so far from its original location that a new check is necessary.
  • the set large area is first checked, in which the transmitters stored in the buffer 8 are checked for reception.
  • the stored categories serve to reduce the defined large area. If the recipient is located in a large city and his listener is not interested in regional traffic news, for example, he can specify, for example, by means of the control unit 3 that only local information can be considered. The radio receiver will then continue the search until it has found a station in the identified large traffic area that preferably has a higher category has category 3. This makes it possible to further narrow the large traffic areas if the number of transmitters, especially in metropolitan areas, makes this possible.
  • the neighboring large traffic areas are listed for predetermined large traffic areas, it is possible to determine in which direction a moving radio receiver is moving. If, for example, when the new traffic area in which the radio receiver is located is found to be north of the original traffic area, it is determined that the radio receiver is moving north. If, for example, traffic messages from large traffic areas are to be output by the radio receiver, it may then make sense not only to output the messages of the current large traffic area, but also traffic news relating to the larger traffic area north of the current large traffic area lies. This makes it possible for the driver of a vehicle with the radio receiver to obtain information about the traffic condition in an area in a forward-looking manner, which he only reaches after a certain time.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The method involves receiving and evaluating the digitally transferred transmitter identity, esp. the PI code for the RDS system, of the selected transmitter. The set frequency and received identity are compared with stored frequencies and identities arranged according to location areas. The identified area of the received transmitter is adopted as the receiver position. When several areas are determined, the receiver location is adopted as the area with the highest received category. Additionally, the receiver is switched to a further frequency to reduce the number of identified areas and the identity used to determine which area the transmitter is in. The process is repeated until an area is positively identified or the finest resolution has been evaluated.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Verfahren zur Bestimmung des Standortes eines Rundfunkempfängers und eines Rundfunkempfängers nach der Gattung der Hauptansprüche. Aus der WO91/07029 ist bereits ein Rundfunkempfänger bekanntgeworden, mittels dem es möglich ist, die Region zu bestimmmen, in der sich der Rundfunkempfänger befindet. Zu diesem Zweck wird das Empfangsfrequenzband abgesucht und sämtliche Rundfunksender festgehalten, die in diesem Frequenzband zu empfangen sind. Aufgrund der empfangenen Rundfunksender, ihrer Identifikation und ihrer Frequenz wird auf die entsprechende Region geschlossen, in der sich der Rundfunkempfänger befindet. Dieser Rückschluß erfolgt durch einen Vergleich mit empfangbaren Sendern und deren Frequenzen, die in einem Speicher des Rundfunkempfängers abgelegt sind. Ist nun ein Rundfunkband relativ stark belegt, so dauert es eine gewisse Zeit, bis sämtliche Rundfunksender erfaßt und ausgewertet sind. Diese Zeit wird unter Umständen als störend empfunden.The invention relates to a method for determining the location of a radio receiver and a radio receiver according to the type of the main claims. A radio receiver has already become known from WO91 / 07029, by means of which it is possible to determine the region in which the radio receiver is located. For this purpose, the reception frequency band is searched and all radio stations that can be received in this frequency band are recorded. On the basis of the radio stations received, their identification and their frequency, it is concluded that the region in which the radio receiver is located. This conclusion is made by a comparison with receivable transmitters and their frequencies, which are stored in a memory of the radio receiver. If a radio band is now relatively busy, it takes a certain amount of time until all of the radio stations have been recorded and evaluated. This time can be perceived as disturbing.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung mit den Merkmalen der Hauptansprüche hat demgegenüber den Vorteil, daß der Standort des Empfängers unter Umständen bereits durch Auswertung einer einzigen Frequenz, ggf. unter Zuhilfenahme von wenigen weiteren Frequenzen möglich ist. Dies ermöglicht eine sehr schnelle Bestimmung des Standortes des Rundfunkempfängers, so daß dafür evtl. erforderliche Unterbrechungen des Rundfunkprogrammes sehr kurz sind und vom Rundfunkhörer kaum wahrgenommen werden.The method according to the invention and the device according to the invention with the features of the main claims has the advantage that the location of the receiver may already be possible by evaluating a single frequency, possibly with the aid of a few further frequencies. This enables the location of the radio receiver to be determined very quickly, so that any interruptions in the radio program which may be necessary for this are very short and are hardly perceived by the radio listener.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserung des im Hauptanspruch angegebenen Verfahrens bzw. der Vorrichtung möglich.The measures listed in the subclaims allow advantageous developments and improvements to the method and the device specified in the main claim.

Besonders vorteilhaft ist, daß geschaltete weitere Frequenzen, die nicht oder nur ungenügend empfangen werden, in einem Puffer gespeichert werden und nochmals abgefragt werden, wenn mittels der empfangenen Frequenzen und deren Senderkennung kein eindeutiger Großraum ermittelt wurde. Dadurch wird es möglich, auch solche Frequenzen auszuwerten, die beispielsweise aufgrund von Abschattungen kurzfristig nicht empfangen werden können. Diese Frequenzen gehen daher für die Standort-Auswertung nicht verloren. Weiterhin ist es vorteilhaft, geschaltete weitere Frequenzen, die mit einer Feldstärke empfangen werden, die einen vorgegebenen Wert übersteigen, in einem Empfangspuffer abzulegen. Dadurch wird es möglich, auf besonders einfache Art und Weise den Großraum zu bestimmen, da lediglich das Empfangspuffer-Ergebnis mit den Speicherinhalten verglichen werden muß, um zu einem oder mehreren Großräumen zu gelangen, in dem sich der Rundfunkempfänger befindet.It is particularly advantageous that switched further frequencies, which are not or only insufficiently received, are stored in a buffer and are queried again if no clear large area has been determined by means of the received frequencies and their transmitter identification. This makes it possible to evaluate frequencies that cannot be received for a short time due to shadowing, for example. These frequencies are therefore not lost for the location evaluation. Furthermore, it is advantageous to store switched further frequencies that are received with a field strength that exceed a predetermined value in a receive buffer. This makes it possible to determine the large area in a particularly simple manner, since only the reception buffer result has to be compared with the memory contents in order to arrive at one or more large areas in which the radio receiver is located.

Weiterhin läßt sich dadurch auf einfache Art und Weise prüfen, ob sich der Rundfunkempfänger noch in dem Großraum befindet, der ursprünglich festgestellt wurde. Durch Überprüfung lediglich der im Empfangspuffer abgelegten Frequenzen ist es nämlich schnell möglich festzustellen, ob ein bewegter Rundfunkempfänger, beispielsweise ein Autoradio, einen bestimmen Großraum bereits verlassen hat oder sich noch in demselben befindet. Günstig ist es ebenfalls, jedem Großraum benachbarte Großräume in einem Nachbarspeicher abzulegen, so daß bei einer wiederholten Ermittlung eines Großraumes bevorzugt Frequenzen geprüft werden, die in den benachbarten Großräumen erwartet werden. Dadurch wird die Suche sehr stark beschleunigt, da ein Fahrzeug üblicherweise nicht sprunghaft von einem Ort zu einem anderen wechselt. Günstig ist weiterhin, neben den Frequenzen und der Senderkennung die Senderkategorie des Senders im Großraumspeicher abzulegen.Dadurch ist eine intelligente Auswahl der relevanten Frequenzen möglich, indem zuerst Frequenzen mit großer Flächenabdeckung/Empfangswahrscheinlichkeit der relevanten Großräume ausgewählt werden. Außerdem ist, nach Auswertung einer Frequenz mit der höchsten Kategorie, die feinste Ortungsauflösung erreicht,
Günstig ist weiterhin, die Senderklasse der Frequenz im Großraumspeicher abzulegen, um bei Überreichweiten Sender geringerer Leistung (hoher Klasse) auszuwählen.
Günstig ist weiterhin, die Frequenzen einem Großraum zuzuordnen, um zu erkennen, ob die ausgewählte aufzuschaltende Frequenz zu einer Reduzierung der Großräume führen kann.
Günstig ist weiterhin, durch Angabe der Nachbarbeziehungen der Großräume bei Empfang und Wegfall von Großräumen die Fahrtrichtung bestimmen zu können.
Günstig ist weiterhin, nach Empfang einer Frequenz und deren Eintrag in Puffer empfangener Sender den Puffer der nicht empfangenen Sender zu löschen und bezüglich der neu selektierten Großräume eine neue Auswahl der zu schaltenden Frequenzen zu ermitteln.
Günstig ist weiterhin, den PI-Code der von der Bedieneinheit eingestellten Frequenz auszuwerten, um eine grobe Vorauswahl der relevanten Großräume zu erhalten.This also makes it easy to check whether the radio receiver is still in the large area that was originally determined. By checking only the frequencies stored in the reception buffer, it is namely possible to quickly determine whether a moving radio receiver, for example a car radio, has already left a certain large area or is still in the same. It is also expedient to store adjacent large rooms in a neighboring memory in each large room, so that when a large room is repeatedly determined, frequencies which are expected in the neighboring large rooms are preferably checked. This speeds up the search very much, since a vehicle usually does not jump from one place to another in a sudden manner. In addition to the frequencies and the transmitter identification, it is also favorable to store the transmitter category of the transmitter in the large-capacity memory, which makes it possible to select the relevant frequencies intelligently by first selecting frequencies with a large area coverage / reception probability of the relevant large areas. In addition, after evaluating a frequency with the highest category, the finest location resolution has been reached,
It is also advantageous to store the frequency transmitter class in the large-capacity memory in order to select transmitters of lower power (high class) in the event of overreach.
It is also favorable to assign the frequencies to a large area in order to recognize whether the selected frequency to be switched on can lead to a reduction in the large areas.
It is also favorable to be able to determine the direction of travel by specifying the neighboring relationships of the large areas when large areas are received and no longer exist.
After receiving a frequency and entering it in the buffer received transmitters, the buffer of the non-buffer is also favorable delete received stations and determine a new selection of the frequencies to be switched with regard to the newly selected large areas.
It is also advantageous to evaluate the PI code of the frequency set by the control unit in order to obtain a rough preselection of the relevant large areas.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 die Aufteilung in Verkehrsgroßräume und in Senderklassen, Figur 2 einen erfindungsgemäßen Rundfunkempfänger, Figuren 3 und Figur 4 Struktogramme eines Programms für die Systemeinheit.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. FIG. 1 shows the division into large traffic areas and into transmitter classes, FIG. 2 shows a radio receiver according to the invention, FIGS. 3 and 4 show structure diagrams of a program for the system unit.

Beschreibung des AusführungsbeispielsDescription of the embodiment

In Figur 1 sind verschiedene Verkehrsgroßräume VK_GR1 bis VK_GR5 eines bestimmten Gebietes dargestellt. Im Ausführungsbeispiel handelt es sich um einen Teil der Mitte der Bundesrepublik Deutschland, die durch die Bereiche zwischen Aachen und Hannover in Ost-West-Ausdehnung und Osnabrück bis Siegen in Nord-Süd-Ausrichtung bestimmt ist. Die Verkehrsflächengroßräume VK_GR umfassen ein Gebiet mit einem Durchmessser von ca. 30 bis 50 km. Sie sind frei definiert nach Gesichtspunkten der Meldungsdichte von z.B. Verkehrsnachrichten und vorhandenen Senderstrukturen, die die Auflösung des Gebietes bestimmen. In der Figur 1 sind des weiteren verschiedene Sender aufgezeigt, die unterschiedlichen Klassen zugeordnet sind. Sender der Klasse 0 sind durch gestrichelte Kreise dargestellt, wie beispielsweise das Ausbreitungsgebiet des Senders 11, der seinen Standort in etwa in Bielefeld hat. Sender der Kasse 0 sind Sender, die einerseits eine hohe Sendeleistung und andererseits eine große Sendereichweite haben. Sender der Klasse 1, die in strichpunktierten Linien dargestellt sind, wie beispielsweise der Sender 12, haben demgegenüber eine geringere Sendeleistung und eine weniger große Reichweite. Sender der Klasse 2, beispielweise der Sender 13, sind Sender kleinerer Leistung, die hauptsächlich zum Bedienen von lokalen Gebieten Verwendung finden. Sie haben demzufolge eine beschränkte Reichweite. Insbesondere bei Sendern der Klasse 0 läßt sich das Verbreitungsgebiet nicht exakt festlegen, da beispielsweise durch Überreichweiten diese Sender eine Verbreitung haben können, die weit über die Verbreitung hinausgeht, die beispielsweise beim Sender 11 in gestrichelten Linien eingezeichnet ist. Diese Reichweiten sind hierbei von Witterungsbedingungen abhängig und daher kaum beeinflußbar. Weiterhin sind den in Figur 1 gezeigten Sendern Kategorien zugeordnet, die ihre Bedeutung für die Verkehrsgroßräume kennzeichnen. Sender der Kategorie 0 zeichnen sich dadurch aus, daß sie den Verkehrsgroßraum nahezu vollständig abdecken. Der Sender 11 beispielsweise deckt den Verkehrsgroßraum 4 vollständig ab und weist daher die Kategorie 0 auf. Werden die Großräume nur teilweise durch einen Sender abgedeckt, so weisen diese Sender eine niedrigere Kategorie auf. Der Sendere 11 deckt beispielsweise den Verkehrsgroßraum 5 teilweise ab und hat deswegen für den Verkehrsgroßraum 5 die Kategorie 2. Der Verkehrsgroßraum 3 wird ebenfalls noch durch den Sender 11 berührt, da dies jedoch nur ein kleiner Bereich ist, weist er im Verkehrsgroßraum 3 die Kategorie 3 auf. Der Sender 13 ist beispielsweise nur im Verkehrsgroßraum 5 empfangbar. Er deckt jedoch dort nicht den gesamten Verkehrsgroßraum ab, sondern lediglich einen Teil, so daß dem Sender 13 die Kategorie 2 zugeordnet ist. Der Sender 12 deckt ebenfalls nur teilweise den Verkehrsgroßraum 5 ab, so daß ihm dort die Kategorie 2 zugebilligt wird. In geringem Umfang ist er auch im Verkehrsgroßraum 1 zu empfangen, so daß er im Verkehrsgroßraum 1 mit der Kategorie 3 bewertet wird, da er hier nur einen sehr kleinen Teilbereich des Verkehrsgroßraumes 1 abdeckt. Die Figur 1 zeigt die typische Senderverteilung in einem bestimmten Gebiet. Die Sender arbeiten auf unterschiedlichen Frequenzen, so daß Störungen der Sender untereinander ausgeschlossen sind. Jedoch ist es möglich, daß lokale Sender auf der gleichen Frequenz arbeiten, wenn sichergestellt ist, daß die lokalen Sender so weit voneinander entfernt sind, daß eine gegenseitige Störung der Sender ausgeschlossen ist. Das gleiche ist natürlich auch für Sender der Klasse 0 festzustellen, wenn nur sichergestellt ist, daß das Gebiet so groß ist, daß sich Sender der obersten Klasse untereinander nicht stören. So ist es beispielsweise durchaus möglich, in Norddeutschland und in Bayern Sendern, die im UKW-Bereich eine große Ausbreitung haben, mit der gleichen Frequenz zu belegen, da üblicherweise norddeutsche Sender auf UKW nicht in Süddeutschland empfangen werden können und umgekehrt.1 shows various large traffic areas VK_GR1 to VK_GR5 of a specific area. In the exemplary embodiment, it is part of the center of the Federal Republic of Germany, which is determined by the areas between Aachen and Hanover in east-west expansion and Osnabrück to Siegen in a north-south orientation. The traffic areas VK_GR cover an area with a diameter of approx. 30 to 50 km. They are freely defined in terms of the density of messages, for example traffic reports and existing transmitter structures, which determine the resolution of the area. FIG. 1 also shows various transmitters which are assigned to different classes. Class 0 transmitters are represented by dashed circles, such as the spreading area of transmitter 11, which is located approximately in Bielefeld. Checkout 0 transmitters are transmitters that have a high transmission power and on the other hand have a large transmission range. Class 1 transmitters, shown in dash-dotted lines, such as transmitter 12, on the other hand, have a lower transmission power and a shorter range. Class 2 transmitters, for example transmitter 13, are transmitters of lower power which are mainly used for serving local areas. As a result, they have a limited reach. In particular in the case of class 0 transmitters, the distribution area cannot be precisely defined, since, for example, overreach, these transmitters can have a distribution that goes far beyond the distribution, which is shown in broken lines for example at the transmitter 11. These ranges are dependent on weather conditions and can therefore hardly be influenced. Furthermore, the transmitters shown in FIG. 1 are assigned categories which indicate their importance for large traffic areas. Category 0 transmitters are characterized by the fact that they cover the traffic area almost completely. The transmitter 11, for example, completely covers the large traffic area 4 and therefore has the category 0. If the large areas are only partially covered by a transmitter, these transmitters have a lower category. The transmitter 11, for example, partially covers the large traffic area 5 and therefore has the category 2 for the larger traffic area 5. The larger traffic area 3 is also still touched by the transmitter 11, but since this is only a small area, it has category 3 in the larger traffic area 3 on. The transmitter 13 can, for example, only be received in the large traffic area 5. However, it does not cover the entire large traffic area there, but only a part, so that the transmitter 13 is assigned to category 2. The transmitter 12 also only partially covers the large traffic area 5, so that category 2 is granted to it there. To a small extent, it can also be received in the large traffic area 1, so that it is in the Large traffic area 1 is rated with category 3, since it covers only a very small sub-area of large traffic area 1. Figure 1 shows the typical transmitter distribution in a certain area. The transmitters work on different frequencies so that interference between the transmitters is excluded. However, it is possible for local transmitters to operate on the same frequency if it is ensured that the local transmitters are so far apart that there is no mutual interference between the transmitters. The same can of course also be found for class 0 transmitters, if only it is ensured that the area is so large that transmitters of the top class do not interfere with each other. For example, it is perfectly possible to use the same frequency in Northern Germany and Bavaria to transmit stations that have a large spread in the FM range, since usually North German transmitters on FM cannot be received in southern Germany and vice versa.

Jeder Sender überträgt weiterhin digital eine Senderkennung, die eine eindeutige Identifizierung des Senders zuläßt. In Europa übertragen nahezu alle Sender sogenannte RDS-Informationen nach dem Radio-Data-System, unter denen auch ein sogenannter PI-Code übertragen wird, der eine eindeutige Senderidentifikation ermöglicht. Der PI-Code enthält Informationen über das Land, in dem der Sender steht, sowie eine individuelle Nummer für jedes Programm, das der Sender ausstrahlt. Lautet beispielsweise der PI-Code eines Senders NDR3 (Norddeutscher Rundfunk 3), so ist ohne weiteres feststellbar, daß sich der Rundfunkempfänger im norddeutschen und nicht im süddeutschen Raum befindet.Each transmitter also digitally transmits a transmitter identifier that allows the transmitter to be clearly identified. In Europe, almost all transmitters transmit so-called RDS information according to the radio data system, under which a so-called PI code is also transmitted, which enables clear station identification. The PI code contains information about the country in which the station is located and an individual number for each program that the station broadcasts. For example, if the PI code of a transmitter is NDR3 (Norddeutscher Rundfunk 3), it can easily be ascertained that the radio receiver is located in northern Germany and not in southern Germany.

Der Rundfunkempfänger ist in Figur 2 näher dargestellt. Mit 1 ist hierbei der Tuner und ZF-Teil der Rundfunkempfängers bezeichnet. Der Tuner 1 steht mit der Systemeinheit 5 in Verbindung. Vom Tuner 1 wird das Empfangssignal zur Systemeinheit 5 übertragen. Die einzuschaltenden Frequenzen werden dem Tuner 1 von der Systemeinheit 5 vorgegeben. Des weiteren ist ein RDS-Demodulator 2 vorgesehen, mit dem es möglich ist, die RDS-Informationen, die vom Tuner empfangen werden, auszuwerten und aufzuschlüsseln. Zu diesem Zweck werden von der Systemeinheit 5 die digital empfangenen Daten dem RDS-Demodulator 2 zur Auswertung zur Verfügung gestellt. Der RDS-Demodulator ermittelt hierbei insbesondere den PI-Code und meldet ihn an die Systemeinheit 5 zurück. Die Systemeinheit 5 kann durch eine Bedieneinheit 3 bedient werden. Insbesondere kann durch diese Bedieneinheit 3 das Gerät ein- und ausgeschaltet werden sowie die Fahrtrichtung beispielsweise in Form von Himmelsrichtungen angegeben werden. Dies erleichtert die spätere Auswahl von Verkehrsgroßräumen. Des weiteren wird durch die Systemeinheit 5 ein Verkehrsgroßraumspeicher 4 angesprochen. Unterteilt nach Verkehrsgroßräumen 1 bis n sind in diesem Speicher 4 die Informationen abgelegt, welche Frequenzen beispielsweise im Verkehrsgroßraum 1 mit Sendern belegt sind, welchen PI-Code diese Sender haben und zu welcher Klasse und zu welcher Kategorie bezogen auf diesen Großraum sie gehören. Weiterhin ist ein Speicher 6 im Rundfunkempfänger vorhanden, der zu vorgegebenen Verkehrsgroßräumen die Nachbarverkehrsgroßräume aufzählt. So sind beispielsweise dem Verkehrsgroßraum 1 die Verkehrsgroßräume 2, 3 und 5 benachbart. Des weiteren ist die Himmelsrichtung angegeben, so daß in Verbindung mit der Bedieneinheit 3 bereits eine Vorauswahl der in Betracht kommenden Verkehrsgroßräume möglich ist bzw. die Fahrtrichtung zu ermitteln ist, wenn ein Großraum verlassen wird und dafür ein anderer zu ermitteln ist, der in bezug auf den vorherigen Großraum eine bestimmte Himmelsrichtung hat. Der Rundfunkempfänger weist des weiteren Puffer 7, 8 und 9 auf, die von der Systemeinheit verwaltet werden. Der Puffer 7 enthält die Anzahl der Sender, die in einem bestimmten Verkehrsgroßraum eigentlich empfangbar sein müssen, jedoch nicht empfangen wurden. Diese sind nach Frequenzen und Kategorie im Puffer 7 abgelegt.The radio receiver is shown in more detail in Figure 2. With 1 the tuner and IF part of the radio receiver is designated. The tuner 1 is in with the system unit 5 in Connection. The received signal is transmitted from the tuner 1 to the system unit 5. The frequencies to be switched on are specified to the tuner 1 by the system unit 5. Furthermore, an RDS demodulator 2 is provided with which it is possible to evaluate and break down the RDS information received by the tuner. For this purpose, the system unit 5 provides the digitally received data to the RDS demodulator 2 for evaluation. The RDS demodulator in particular determines the PI code and reports it back to the system unit 5. The system unit 5 can be operated by an operating unit 3. In particular, this control unit 3 can be used to switch the device on and off and to indicate the direction of travel, for example in the form of cardinal points. This facilitates the later selection of large traffic areas. Furthermore, the system unit 5 addresses a large traffic storage area 4. Subdivided into major traffic areas 1 to n, the information is stored in this memory 4 as to which frequencies are occupied by transmitters, for example in major traffic area 1, which PI code these transmitters have and to which class and to which category they relate to this major area. Furthermore, a memory 6 is present in the radio receiver, which enumerates the neighboring large traffic areas for predetermined large traffic areas. For example, the main traffic areas 1 are adjacent to the main traffic areas 2, 3 and 5. Furthermore, the cardinal direction is indicated, so that in conjunction with the control unit 3, a pre-selection of the traffic congestion areas in question is already possible or the direction of travel is to be determined when a large area is left and another is to be ascertained for this purpose the previous metropolitan area has a certain direction. The radio receiver also has buffers 7, 8 and 9, which are managed by the system unit. Of the Buffer 7 contains the number of transmitters that actually have to be receivable in a particular large traffic area, but were not received. These are stored in buffer 7 by frequency and category.

Wird beispielsweise durch die Systemeinheit 5 im Tuner 1 eine Frequenz eingestellt, die im Verkehrsgroßraum 1 empfangbar sein müßte und wird diese nicht empfangen, so wird die hierzu erforderliche Information im Puffer 7 abgelegt. Im Puffer 8 werden demgegenüber die Sender eingespeichert, die empfangen werden. Wird beispielsweise im Verkehrsgroßraum 1 eine erste Frequenz eingestellt und diese empfangen, so wird die dazugehörige Frequenz sowie die Kategorie im Empfangspuffer 8 abgelegt. Im Puffer 9 werden schließlich die Verkehrsgroßräume abgelegt, die aufgrund der empfangenen Sender zugeordnet werden können. Ist die Zahl der im Puffer 9 abgelegten Verkehrsgroßräume gleich 1, oder wurde eine Frequenz der höchsten Kategorie, im Ausführungsbeispiel 3, ausgewertet, so ist der Suchlauf beendet, da nunmehr die feinste Auflösung des Rundfunkempfängers bezüglich seiner Verkehrsgroßräume erreicht ist.If, for example, the system unit 5 sets a frequency in the tuner 1 that should be receivable in the large traffic area 1 and is not received, the information required for this is stored in the buffer 7. In contrast, the transmitters that are received are stored in buffer 8. If, for example, a first frequency is set in the large traffic area 1 and received, the associated frequency and the category are stored in the reception buffer 8. Finally, the large traffic areas that can be assigned on the basis of the received stations are stored in the buffer 9. If the number of large traffic areas stored in the buffer 9 is 1, or if a frequency of the highest category, in the exemplary embodiment 3, has been evaluated, the search is ended since the finest resolution of the radio receiver with regard to its large traffic areas has now been reached.

Einzelheiten der Arbeitsweise des Verkehrsrundfunkempfängers sollen nunmehr im folgenden anhand der Struktogramme in Figur 3 und 4 näher erläutert werden, wobei die Struktogramme in Programme umsetzbar sind, die in der Systemeinheit 5 abgelegt und bezüglich der Standortbestimmung des Rundfunkempfängers abgearbeitet werden. Wird der Rundfunkempfänger eingeschaltet, so wird er entweder auf einer bestimmten Frequenz eingestellt sein, und das Programm, das auf dieser Frequenz übertragen wird, wiedergeben oder aber einen Sendersuchlauf starten und den nächsten empfangbaren Sender dem Bediener des Rundfunkgerätes zu Gehör bringen. Diese Frequenz f0 wird von der Systemeinheit 5 an der Stelle 20 erfaßt. Gleichzeitig wertet der RDS-Demodulator 2 das empfangene Signal aus und ermittelt den PI-Code, den er auf der Frequenz f0 empfängt. Auch diese Information wird vom RDS-Decoder 2 der Systemeinheit 5 zur Verfügung gestellt. Im darauf folgenden Schritt 21 ruft nun die Systemeinheit 5 den Speicher 4 auf, in dem sortiert nach Verkehrsgroßräumen sämtlichen Frequenzen, der dazugehörige PI-Code sowie die Klasse abgespeichert sind. Der gesamte Speicher wird durchsucht und die Verkehrsgroßräume ermittelt, die die eingestellte Frequenz f0 sowie den PI-Code, der vom RDS-Demodulator 2 ermittelt wurde, beinhalten. Diese Verkehrsgroßräume werden an der Stelle 34 im Puffer 9 sowohl zahlenmäßig als auch bezüglich des Großraums abgelegt. Zusätzlich wird in den Puffer 8 die empfangene Frequenz und die Kategorie eingeschrieben, wobei die niedrigste Kategorie ausgewählt wird, die entsprechend PI-Code und Frequenz im Speicher 4 vorkommt. An der Abfragestelle 22 wird nun geprüft, ob zufälligerweise lediglich ein Verkehrsgroßraum an der Stelle 21 ermittelt wurde und im Verkehrsgroßraumpuffer 9 abgelegt wurde oder ein Sender der höchsten Kategorie, also der Kategorie 3 für einen Verkehrsgroßraum ermittelt wurde. Ist dies der Fall, wird an der Stelle 23 dieser Verkehrsgroßraum als Standort des Rundfunkempfängers oder die Verkehrsgroßräume verwendet, die dem Sender der höchsten Kategorie zugeordnet sind, der die feinste Auflösung erreicht hat festgelegt und das Programm beendet. Ansonsten wird von der Stelle 22 zur Stelle 24 gesprungen. An der Stelle 24 wird nun von der Systemeinheit 5 eine weitere Frequenz f1 an den Tuner 1 gegeben und diese eingestellt. Diese nächste Frequenz wird dadurch ausgewählt, daß eine Frequenz derselben Kategorie wie die des auf der Frequenz f0 empfangenen Senders genommen wird, die jedoch in weniger Großräumen zu empfangen ist, als selektiert wurden. Gibt es in dieser Kategorie keine Frequenz, die eine Verringerung der Großräume bewirken würde, so werden die Listen der festgestellten Verkehrsgroßräume nach Frequenzen der nächsten höheren Kategorie durchsucht.Details of the mode of operation of the traffic radio receiver will now be explained in more detail below with the aid of the structograms in FIGS. 3 and 4, the structograms being convertible into programs which are stored in the system unit 5 and processed with regard to the location of the radio receiver. If the radio receiver is switched on, it will either be set to a certain frequency and play the program that is being transmitted on this frequency or start a station search and bring the next receivable station to the operator of the radio device. This frequency f 0 is from of the system unit 5 at point 20. At the same time, the RDS demodulator 2 evaluates the received signal and determines the PI code which it receives at the frequency f 0 . This information is also made available by the RDS decoder 2 to the system unit 5. In the subsequent step 21, the system unit 5 then calls the memory 4, in which all frequencies, the associated PI code and the class are stored, sorted by large traffic areas. The entire memory is searched and the large traffic areas are determined which contain the set frequency f 0 and the PI code determined by the RDS demodulator 2. These large traffic areas are stored at point 34 in buffer 9 both in terms of numbers and in relation to the greater area. In addition, the received frequency and the category are written into the buffer 8, the lowest category being selected which occurs in the memory 4 in accordance with the PI code and frequency. At the interrogation point 22, it is now checked whether, by chance, only a large traffic area has been determined at the point 21 and has been stored in the large traffic buffer 9 or whether a transmitter of the highest category, that is to say category 3, has been determined for a large traffic area. If this is the case, this traffic area is used at location 23 as the location of the radio receiver or the traffic areas which are assigned to the transmitter of the highest category which has achieved the finest resolution and terminates the program. Otherwise, jump from point 22 to point 24. At the point 24, a further frequency f 1 is now given to the tuner 1 by the system unit 5 and this is set. This next frequency is selected by taking a frequency of the same category as that of the transmitter received on frequency f 0 , but which can be received in fewer large areas than were selected. There is no frequency in this category that is a decrease which would result in large areas, the lists of the identified large traffic areas are searched for frequencies of the next higher category.

Dies ist jedoch nur eine Möglichkeit vorzugehen. Prinzipiell eignet sich zur Verringerung der Verkehrsgroßräume jegliche Maßnahme, mittels der es möglich ist, die Zahl der im Speicher 9 abgelegten Verkehrsgroßräume zu verringern. Sind beispielsweise drei Großräume abgelegt, so ist es möglich, eine Frequenz zu wählen, die nur noch in zwei Großräumen, jedoch nicht im dritten Großraum zu empfangen ist. Dies könnte dann ebenfalls zu einer weiteren Reduzierung der Großräume führen. Ist der Tuner auf der Frequenz f1 eingestellt, so wird bei dieser Frequenz f1 der dort empfangene Sender an der Stelle 24 überprüft. An der Stelle 25 erfolgt nun eine Abfrage, ob der Sender auf der Frequenz f1 mit der notwendigen Feldstärke empfangen wird. Wird ein bestimmter Schwellwert nicht erreicht, so wird an der Stelle 26 die entsprechende Frequenz sowie die dazugehörige Klasse in den Speicher 7 des Rundfunkempfängers eingeschrieben und vor die Stelle 30 gesprungen. Wurde auf dieser Sendefrequenz ein Signal mit einer Mindestfeldstärke empfangen, so wird diese Frequenz mit ihrer Klasse in den Puffer der empfangenen Sender 8 eingeschrieben und der Puffer 7 der nicht empfangbaren Sender gelöscht, was an der Stelle 27 bewirkt wird. Nunmehr wird an der Stelle 28 wiederum ein Vergleich wie an der Stelle 22 mit der Frequenz f1 durchgeführt. Hierbei wird nur noch in den Verkehrsgroßräumen gesucht, die im Speicher 9 abgelegt sind. Ergibt sich hierbei, daß hier nur noch ein Verkehrsgroßraum in Frage kommt, so wird an der Stelle 29 dieser Verkehrsgroßraum als der Bereich festgelegt, in dem sich der Rundfunkempfänger befindet und das Programm verlassen. Treten wiederum mehrere Verkehrsgroßräume auf, so wird die Kategorie des Senders geprüft und das Programm dann verlassen, wenn die höchste Kategorie vorliegt.Sonst wird zur Stelle 30 gesprungen, wo eine Abfrage stattfindet, ob bereits alle im Speicher 4 abgelegten Frequenzen der im Speicher 9 befindlichen Verkehrsgroßräume, die zu einer Reduzierung der Verkehrsgroßräume führen, abgearbeitet worden sind. Ist dies nicht der Fall, so wird wieder zur Stelle 24 zurückgesprungen und die nächste Frequenz f2 aufgerufen.However, this is only one way to proceed. In principle, any measure is suitable for reducing the large traffic areas by means of which it is possible to reduce the number of large traffic areas stored in the memory 9. If, for example, three large rooms are stored, it is possible to select a frequency which can only be received in two large rooms, but not in the third large room. This could also lead to a further reduction in the large areas. If the tuner is set to frequency f 1 , then the transmitter received there is checked at point 24 at this frequency f 1 . At point 25 there is now a query as to whether the transmitter is received on frequency f 1 with the necessary field strength. If a certain threshold value is not reached, the corresponding frequency and the associated class are written into the memory 7 of the radio receiver at the point 26 and jumped to the point 30. If a signal with a minimum field strength was received on this transmission frequency, this frequency is written with its class into the buffer of the received transmitter 8 and the buffer 7 of the non-receivable transmitter is deleted, which is effected at point 27. A comparison is now made at point 28 with the frequency f 1 as at point 22. In this case, only the large traffic areas that are stored in the memory 9 are searched for. If this results in the fact that only one large traffic area is possible here, then this large traffic area is defined at point 29 as the area in which the radio receiver is located and which leaves the program. If several large traffic areas occur again, the category of the station is checked and then the program If the highest category is present, the process jumps to point 30, where a query takes place as to whether all the frequencies of the large traffic areas stored in the memory 9, which lead to a reduction in the large traffic areas, have already been processed. If this is not the case, the system jumps back to point 24 and calls the next frequency f 2 .

Es werden also in schneller Folge nach einem vorgegebenen Auswahlverfahren Frequenzen geprüft, die eine Gebietseingrenzung bewirken. Diese Routine wird so lange fortgesetzt, bis ein einziger Verkehrsgroßraum übrigbleibt, der dann als Standort des Empfängers gilt, oder die letzte empfangene Frequenz die höchste verfügbare Kategorie (feinste Auflösung) enthält. Sind sämtliche verfügbaren Frequenzen durchlaufen, was an der Stelle 30 festgestellt wird, und ist immer noch nicht ein Verkehrsgroßraum eindeutig identifiziert, so gelangt das Programm an die Stelle 31, wo der Zustand des Speichers 7 geprüft wird. Sind im Speicher 7 noch nicht empfangbare Frequenzen gespeichert, werden diese an der Stelle 32 der Reihe nach aus dem Speicher 7 ausgelesen und in der zuvor beschriebenen Weise geprüft. Dadurch können auch solche Frequenzen zur Auswertung herangezogen werden, die beispielsweise aufgrund von Abschattungen oder Störungen nur kurzfristig nicht zu empfangen waren. Spätestens hier ergibt sich in der überwiegenden Anzahl aller Fälle ein eindeutiger Verkehrsgroßraum, in dem sich der Rundfunkempfänger befindet. Nur in seltenen Ausnahmefällen, wenn man sich beispielsweise an der Grenze zweier Großräume in exponierter Lage bewegt, könnte eine Zuordnung fraglich bleiben. In diesem Fall wird an der Stelle 31 zum Beginn des Programms zurückgesprungen, wenn alle Prüfmöglichkeiten erschöpft sind. Dann wird das Verfahren nochmals von vorne begonnen, da zu erwarten ist, daß beispielsweise durch die Bewegung des Fahrzeuges sich die zur Zeit vorhandene ungünstige Lage relativ schnell ändert.Frequencies are then checked in rapid succession according to a predetermined selection procedure, which limit the area. This routine continues until a single large traffic area remains, which is then considered the location of the receiver, or the last received frequency contains the highest available category (finest resolution). If all available frequencies have been run through, which is determined at point 30 and a large traffic area is still not clearly identified, the program reaches point 31, where the state of the memory 7 is checked. If frequencies not yet receivable are stored in the memory 7, these are read out from the memory 7 at the point 32 in sequence and checked in the manner described above. As a result, those frequencies can also be used for evaluation that could not be received for a short time due to shadowing or interference, for example. At the latest here, in the majority of all cases, there is a clear traffic area in which the radio receiver is located. An assignment could only remain questionable in rare exceptional cases, for example if one moves in an exposed location at the border of two large areas. In this case, jump back to the beginning of the program at point 31 when all test options have been exhausted. Then the procedure is started again, since it is to be expected that, for example, the currently unfavorable position changes relatively quickly due to the movement of the vehicle.

Wie man erkennt, ist es durch das vorgestellte Verfahren möglich, üblicherweise mit sehr wenigen Identifikationsschritten, im günstigsten Fall bereits mit einer einzigen Frequenz zum Standort des Fahrzeugs zu gelangen. Die Suche nach dem Standort des Rundfunkempfängers geht daher sehr schnell vonstatten.As can be seen, the method presented enables the location of the vehicle to be reached, usually with very few identification steps, in the best case with a single frequency. The search for the location of the radio receiver is therefore very quick.

In Figur 4 ist der Fall dargestellt, der zu einer Wiederholung der Überprüfung des Standortes führt. Wird nämlich der Rundfunkempfänger bewegt, ist nicht davon auszugehen, daß der einmal ermittelte Standort beibehalten wird. Als Kriterium für die Ermittlung eines neuen Standortes kann entweder die Zeit dienen, d.h. daß in regelmäßigen Zeitabständen eine Überprüfung des Standortes gemäß dem Diagramm nach Figur 3 vorgenommen wird, oder aber es kann wie in Figur 4 an der Stelle 40 abgeprüft werden, ob die empfangene Frequenz fa, die zum besten Ortungsergebnis geführt hat, einen gewissen Pegel unterschreitet. Ist dies der Fall, wird davon ausgegangen, daß sich der Rundfunkempfänger so weit von seinem ursprünglichen Standort entfernt hat, daß eine neue Überprüfung notwendig ist. Hierbei wird zuerst der eingestellte Großraum überprüft, in dem die im Puffer 8 abgelegten Sender auf Empfangbarkeit geprüft werden. Sind diese Sender alle oder zumindest überwiegend empfangbar, wird auf den gleichen Großraum geschlossen. Ansonsten werden die im Speicher 6 aufgelisteten Nachbarverkehrsgroßräume des ursprünglich festgestellten Verkehrsgroßraumes in den Verkehrsgroßraumspeicher 9 umgeladen. Es sind dann im Speicher 9 wieder mehrere Verkehrsgroßräume eingespeichert, was jedoch nicht aufgrund einer mehrdeutigen Frequenzauswertung erfolgt, sondern aufgrund des Speichers 6. Aus den eingespeicherten Verkehrsgroßräumen wird nunmehr an der Stelle 42 eine Frequenz f1 ausgewählt, mittels der die Nachbarverkehrsgroßräume zu reduzieren sind. Diese Reduzierung wird weiterhin dann vereinfacht, wenn über die Bedientastatur 3 bereits die Fahrtrichtung eingegeben worden ist. Hat beispielsweise der Fahrer des Fahrzeuges durch Drücken der Taste "Süd" in der Bedieneinheit 3 erkennen lassen, daß er in Richtung Süden zu fahren gedenkt, werden von den Nachbarverkehrsgroßraumspeicher 6 nur solche Großräume in den Speicher 9 übernommen, die in Richtung Süd laufen. Befindet sich daher der Fahrer im Verkehrsgroßraum 1, würden im konkreten Fall lediglich die Verkehrsgroßräume 2 und 3 in den Speicher 9 geschrieben. Die Frequenz f1 an der Stelle 42 wird nun so ausgewählt, daß die im Speicher 9 vorhandenen Verkehrsgroßräume reduziert werden können. An der Stelle 43 wird abgefragt, ob lediglich ein Verkehrsgroßraum aufgrund der Frequenz f1 festgelegt werden kann oder ob diese Frequenz die höchste verfügbare Kategorie enthält. Ist dies der Fall, ist der neue Standort bereits ermittelt und das Programm kann beendet werden. Ansonsten wird das Programm wie in Figur 3 beschrieben, an der Stelle 24 fortgesetzt und in der dort beschriebenen Weise eine Reduktion der im Speicher 9 abgelegten Verkehrsgroßräume vorgenommen.FIG. 4 shows the case which leads to a repetition of the location check. If the radio receiver is moved, it cannot be assumed that the location once determined will be retained. The criterion for determining a new location can either be the time, that is to say that the location is checked at regular intervals in accordance with the diagram according to FIG. 3, or else, as in FIG. 4, it can be checked at point 40 whether the received location Frequency f a , which has led to the best location result, falls below a certain level. If this is the case, it is assumed that the radio receiver has moved so far from its original location that a new check is necessary. Here, the set large area is first checked, in which the transmitters stored in the buffer 8 are checked for reception. If these stations are all or at least predominantly receivable, the same large area is concluded. Otherwise, the neighboring large traffic areas listed in the memory 6 of the originally determined large traffic area are reloaded into the large traffic area memory 9. A number of large traffic areas are then again stored in the memory 9, but this is not due to an ambiguous one Frequency evaluation takes place, but on the basis of the memory 6. A frequency f 1 is now selected from the stored traffic areas at point 42, by means of which the neighboring traffic areas are to be reduced. This reduction is further simplified if the direction of travel has already been entered via the control keyboard 3. For example, if the driver of the vehicle has shown by pressing the "South" button in the control unit 3 that he intends to drive south, only those large spaces that run in the south are taken over by the neighboring large-capacity store 6. If the driver is therefore in the large traffic area 1, in the specific case only the large traffic areas 2 and 3 would be written into the memory 9. The frequency f 1 at point 42 is now selected so that the large traffic areas present in the memory 9 can be reduced. At point 43, a query is made as to whether only a large traffic area can be determined on the basis of the frequency f 1 or whether this frequency contains the highest available category. If this is the case, the new location has already been determined and the program can be ended. Otherwise, the program is continued as described in FIG. 3, at point 24 and, in the manner described there, the large traffic areas stored in memory 9 are reduced.

Die abgelegten Kategorien dienen dazu, den festgelegten Großraum zu verkleinern. Befindet sich nämlich der Empfänger in einer großen Stadt und ist sein Hörer z.B. an regionalen Verkehrsnachrichten nicht interessiert, so kann er beispielsweise durch Vorgabe mittels der Bedieneinheit 3 festlegen, daß lediglich örtliche Informationen in Betracht kommen. Der Rundfunkempfänger wird dann die Suche weiter fortsetzen, bis er im ermittelten Verkehrsgroßraum einen Sender gefunden hat, der eine höhere Kategorie, vorzugsweise die Kategorie 3 aufweist. Dadurch wird es möglich, die Verkehrsgroßräume weiter einzuengen, wenn die Zahl der Sender, insbesondere in Ballungsgebieten, dies ermöglicht.The stored categories serve to reduce the defined large area. If the recipient is located in a large city and his listener is not interested in regional traffic news, for example, he can specify, for example, by means of the control unit 3 that only local information can be considered. The radio receiver will then continue the search until it has found a station in the identified large traffic area that preferably has a higher category has category 3. This makes it possible to further narrow the large traffic areas if the number of transmitters, especially in metropolitan areas, makes this possible.

Aufgrund des Speichers 6, in dem zu vorgegebenen Verkehrsgroßräumen die Nachbarverkehrsgroßräume aufgezählt sind, ist es möglich, bei einem bewegten Rundfunkempfänger festzustellen, in welche Richtung er bewegt wird. Wird beispielsweise beim neuen Aufprüfen des Verkehrsgroßraumes, in dem sich der Rundfunkempfänger befindet, festgestellt, daß dieser nördlich vom ursprünglichen Verkehrsgroßraum ist, wird dadurch festgestellt, daß sich der Rundfunkempfänger in Richtung Norden bewegt. Sollen beispielsweise durch den Rundfunkempfänger Verkehrsnachrichten von Verkehrsgroßräumen ausgegeben werden, so kann es dann sinnvoll sein, nicht nur die Nachrichten des aktuellen Verkehrsgroßraumes auszugeben, sondern auch Verkehrsnachrichten, die den Verkehrsgroßraum betreffen, der nördlich vom aktuellen Verkehrsgroßraum liegt. Dadurch wird es dem Fahrer eines Fahrzeuges mit dem Rundfunkempfänger möglich, auch schon vorausblickend Informationen über den Verkehrszustand in einem Gebiet zu erhalten, das er erst nach einer gewissen Zeit erreicht.On the basis of the memory 6, in which the neighboring large traffic areas are listed for predetermined large traffic areas, it is possible to determine in which direction a moving radio receiver is moving. If, for example, when the new traffic area in which the radio receiver is located is found to be north of the original traffic area, it is determined that the radio receiver is moving north. If, for example, traffic messages from large traffic areas are to be output by the radio receiver, it may then make sense not only to output the messages of the current large traffic area, but also traffic news relating to the larger traffic area north of the current large traffic area lies. This makes it possible for the driver of a vehicle with the radio receiver to obtain information about the traffic condition in an area in a forward-looking manner, which he only reaches after a certain time.

Claims (11)

Verfahren zur Bestimmung des Standortes eines Rundfunkempfängers, insbesondere eines Fahrzeugempfängers, wobei durch den Rundfunkempfänger die digital übertragene Senderkennung, insbesondere der PI-Code nach dem RDS-System, des eingestellten Senders empfangen und ausgewertet wird, dadurch gekennzeichnet, daß die eingestellte Frequenz und die empfangene Senderkennung mit in einem Speicher abgelegten Frequenzen und Senderkennungen, die nach Großräumen geordnet sind, verglichen werden, und daß der Großraum bestimmt wird, in dem sich der empfangene Sender befindet und dieser als Empfängerstandort angenommen wird, daß dann, wenn mehrere Großräume ermittelt werden, die Kategorie des empfangenen Senders ausgewertet wird und diese Großräume als Empfängerstandort angenommen werden, wenn die höchste empfangene Kategorie diesem Sender zugeordnet wird, daß ansonsten der Empfänger auf eine weitere Frequenz geschaltet wird, durch die die Zahl der bestimmten Großräume reduziert wird und daß mit Hilfe der empfangenen Senderidentifikation der Großraum bestimmt wird, in dem sich der eingestellte Sender befindet und daß der Vorgang wiederholt wird, bis ein eindeutiger Großraum bestimmt ist, oder die feinste Auflösung, gekennzeichnet durch Frequenzen mit der höchsten Kategorie, ausgewertet wurde.Method for determining the location of a radio receiver, in particular a vehicle receiver, the digitally transmitted transmitter identifier, in particular the PI code according to the RDS system, of the set transmitter being received and evaluated by the radio receiver, characterized in that the set frequency and the received frequency Transmitter identification is compared with frequencies stored in a memory and transmitter identifications, which are arranged according to large areas, and that the large area in which the received transmitter is located and this is assumed to be the receiver location is determined, that if several large areas are determined, the Category of the received transmitter is evaluated and these large areas are assumed to be the receiver location if the highest received category is assigned to this transmitter, otherwise the receiver is switched to a further frequency by which the number of specific large areas is reduced ird and that with the help of the received transmitter identification the large area in which the set transmitter is located and that the process is repeated until a clear large area is determined, or the finest resolution, characterized by frequencies with the highest category, has been evaluated. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß geschaltete weitere Frequenzen, die nicht oder ungenügend empfangen werden, in einem Puffer (7) gespeichert werden und nochmals abgefragt werden, wenn mittels der empfangenen Frequenzen und deren Senderkennung kein eindeutiger Großraum ermittelt wurde.Method according to Claim 1, characterized in that switched further frequencies which are not received or are received inadequately are stored in a buffer (7) and are queried again if no clear large area has been determined by means of the received frequencies and their transmitter identification. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß geschaltete weitere Frequenzen, die mit einer Feldstärke empfangen werden, die einen vorgegebenen Wert übersteigt, in einem Speicher (8) für empfangene Sender abgelegt werden und daß der Speicher (7) für nicht empfangbare Sender gelöscht wird.Method according to Claim 1 or 2, characterized in that switched further frequencies which are received with a field strength which exceeds a predetermined value are stored in a memory (8) for received transmitters and in that the memory (7) for non-receivable transmitters is deleted. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß nach Ermittlung eines Großraums in regelmäßigen Abständen oder nach Absinken der Feldstärke des Signals der eingestellten Frequenz unter einen vorgegebenen Wert die im Speicher (8) für empfangene Sender abgelegten Frequenzen geprüft werden.Method according to Claim 3, characterized in that after a large area has been determined at regular intervals or after the field strength of the signal of the set frequency has dropped below a predetermined value, the frequencies stored in the memory (8) for received transmitters are checked. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jedem Großraum benachbarte Großräume in einem Nachbarspeicher (6) abgelegt sind und daß bei der wiederholten Ermittlung eines Großraumes bevorzugt Frequenzen geprüft werden, die in benachbarten Großräumen erwartet werden.Method according to one of the preceding claims, characterized in that each large space adjacent large spaces are stored in a neighboring memory (6) and that the repeated determination of a large space preferably checks frequencies that are expected in neighboring large spaces. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß durch hinzukommende/wegfallende Großräume die Fahrtrichtung ermittelt wird.A method according to claim 5, characterized in that the direction of travel is determined by adding / removing large spaces. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß neben den Frequenzen und der Senderkennung die Klassen der Sender und die Kategorie im Großraumspeicher (4) abgelegt sind.Method according to one of the preceding claims, characterized in that in addition to the frequencies and Sender identification, the classes of the transmitters and the category are stored in the large-capacity memory (4). Verfahren nach Anspruch 6, dadurch gekennzeichnet,daß die Senderkategorie ausgewertet wird, um zuerst Frequenzen von hoher Empfangswahrscheinlichkeit zu schalten, um die Anzahl der Schaltungen und die Großräume zu reduzieren.Method according to Claim 6, characterized in that the transmitter category is evaluated in order to switch frequencies with a high probability of reception first, in order to reduce the number of circuits and the large areas. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Senderklasse ausgewertet wird, um zuerst Frequenzen geringerer Wahrscheinlichkeit von Überreichweiten auszuwerten.Method according to Claim 6 or 7, characterized in that the transmitter class is evaluated in order first to evaluate frequencies with a lower probability of overreaching. Rundfunkempfänger, insbesondere Fahrzeugempfänger mit einem Decoder (2) zur Decodierung von digital übertragenen Senderkennungen, insbesondere den PI-Code nach dem RDS-System, dadurch gekennzeichnet, daß der Empfänger einen Speicher (4) von im Großraum empfangbaren Sendern bezüglich deren Frequenz und deren Senderkennung aufweist, daß der Rundfunkempfänger anhand der eingestellten Frequenz und deren Senderidentifikation aus den im Speicher (4) abgelegten Großräumen den Großraum bestimmt, in dem sich der empfangene Sender befindet und diesen als Empfängerstandort annimmt, daß dann, wenn mehrere Großräume bestimmt sind, der Empfänger auf eine weitere Frequenz schaltet, durch die die Zahl der bestimmten Großräume reduzierbar ist, und mit Hilfe der dann empfangenen Senderidentifikation den Großraum bestimmt, in dem sich der eingestellte Sender befindet und daß der Empfänger den Vorgang wiederholt, bis ein eindeutiger Großraum bestimmt ist.Radio receiver, in particular vehicle receiver with a decoder (2) for decoding digitally transmitted transmitter identifications, in particular the PI code according to the RDS system, characterized in that the receiver has a memory (4) of transmitters receivable in the large area with regard to their frequency and their transmitter identification shows that the radio receiver uses the set frequency and its transmitter identification from the large areas stored in the memory (4) to determine the large area in which the received transmitter is located and accepts this as the receiver location, so that when several large areas are determined, the receiver opens switches another frequency through which the number of certain large areas can be reduced, and with the help of the transmitter identification then received determines the large area in which the set transmitter is located and that the receiver repeats the process until a clear large area is determined. Rundfunkempfänger nach Anspruch 8, dadurch gekennzeichnet, daß der Empfänger einen Großraumspeicher (9) aufweist, in dem alle Großräume abgelegt sind, die bestimmt worden sind und daß der Suchvorgang beendet worden ist, wenn im Großraumspeicher (9) ein Großraum gespeichert ist.Radio receiver according to Claim 8, characterized in that the receiver has a large-capacity memory (9) in which all the large-scale areas which are determined are stored have been and that the search process has ended when a large area is stored in the large-capacity memory (9).
EP95114082A 1995-09-08 1995-09-08 Method and means for determining the location of a broadcast receiver Ceased EP0762679A1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866576A2 (en) * 1997-03-20 1998-09-23 GRUNDIG Aktiengesellschaft RDS-receiver for the evaluation of traffic information messages
EP1022704A1 (en) * 1999-01-22 2000-07-26 Rover Group Limited A traffic information system for a vehicle
FR2928795A1 (en) * 2008-03-12 2009-09-18 Qisda Corp Radiobroadcast receiver's e.g. portable digital TV, current location determining method, involves storing and defining detected candidate region as current region, when intensity in candidate region is not less than one of thresholds
US8023914B2 (en) 2007-01-31 2011-09-20 Qlada Corporation Method for determining region where broadcasting receiver is located
EP2903188A1 (en) * 2014-01-29 2015-08-05 Continental Automotive GmbH System and method for detecting geographical regions for mobile receiver and method

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WO1991007029A1 (en) 1989-11-03 1991-05-16 Robert Bosch Gmbh Radio receiver, in particular for vehicles
EP0446985A1 (en) * 1990-03-07 1991-09-18 Koninklijke Philips Electronics N.V. Method of transmitting radio data system signals with traffic program identification and receiver for such radio data system signals
EP0539708A2 (en) * 1991-10-31 1993-05-05 Robert Bosch Gmbh Broadcast receiver, in particular vehicle receiver
EP0586897A1 (en) * 1992-09-10 1994-03-16 Robert Bosch Gmbh Method for selecting route-related announcements with RDS receivers
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866576A2 (en) * 1997-03-20 1998-09-23 GRUNDIG Aktiengesellschaft RDS-receiver for the evaluation of traffic information messages
EP0866576A3 (en) * 1997-03-20 2000-08-30 GRUNDIG Aktiengesellschaft RDS-receiver for the evaluation of traffic information messages
EP1022704A1 (en) * 1999-01-22 2000-07-26 Rover Group Limited A traffic information system for a vehicle
US8023914B2 (en) 2007-01-31 2011-09-20 Qlada Corporation Method for determining region where broadcasting receiver is located
FR2928795A1 (en) * 2008-03-12 2009-09-18 Qisda Corp Radiobroadcast receiver's e.g. portable digital TV, current location determining method, involves storing and defining detected candidate region as current region, when intensity in candidate region is not less than one of thresholds
EP2903188A1 (en) * 2014-01-29 2015-08-05 Continental Automotive GmbH System and method for detecting geographical regions for mobile receiver and method

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