EP0762679A1 - Méthode et dispositif pour la détermination de la position géographique d'un récepteur de radiodiffusion - Google Patents

Méthode et dispositif pour la détermination de la position géographique d'un récepteur de radiodiffusion 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)
English (en)
Inventor
Stefan Lau
Dietmar Dipl.-Ing. Kell (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP95114082A priority Critical patent/EP0762679A1/fr
Publication of EP0762679A1 publication Critical patent/EP0762679A1/fr
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)
EP95114082A 1995-09-08 1995-09-08 Méthode et dispositif pour la détermination de la position géographique d'un récepteur de radiodiffusion Ceased EP0762679A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95114082A EP0762679A1 (fr) 1995-09-08 1995-09-08 Méthode et dispositif pour la détermination de la position géographique d'un récepteur de radiodiffusion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95114082A EP0762679A1 (fr) 1995-09-08 1995-09-08 Méthode et dispositif pour la détermination de la position géographique d'un récepteur de radiodiffusion

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EP0762679A1 true EP0762679A1 (fr) 1997-03-12

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EP95114082A Ceased EP0762679A1 (fr) 1995-09-08 1995-09-08 Méthode et dispositif pour la détermination de la position géographique d'un récepteur de radiodiffusion

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866576A2 (fr) * 1997-03-20 1998-09-23 GRUNDIG Aktiengesellschaft Récepteur RDS pour l'évaluation de messages d'information routière
EP1022704A1 (fr) * 1999-01-22 2000-07-26 Rover Group Limited Système d'informations routier pour véhicules
FR2928795A1 (fr) * 2008-03-12 2009-09-18 Qisda Corp Procede de determination d'une region dans laquelle se situe un recepteur de radiodiffusion
US8023914B2 (en) 2007-01-31 2011-09-20 Qlada Corporation Method for determining region where broadcasting receiver is located
EP2903188A1 (fr) * 2014-01-29 2015-08-05 Continental Automotive GmbH Système et procédé de reconnaissance de régions géographiques pour récepteur mobile et procédé

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007029A1 (fr) 1989-11-03 1991-05-16 Robert Bosch Gmbh Recepteur radio, en particulier autoradio
EP0446985A1 (fr) * 1990-03-07 1991-09-18 Koninklijke Philips Electronics N.V. Procédé de transmission de signaux de système de données de radio avec identification de programmes routiers et récepteur pour ces signaux de système de données de radio
EP0539708A2 (fr) * 1991-10-31 1993-05-05 Robert Bosch Gmbh Récepteur de radiodiffusion, en particulier récepteur pour véhicules
EP0586897A1 (fr) * 1992-09-10 1994-03-16 Robert Bosch Gmbh Procédé de sélection d'annonces selon l'itinéaraire emprunté dans les récepteurs RD
DE4233210A1 (de) * 1992-10-02 1994-04-07 Bosch Gmbh Robert Rundfunkempfänger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007029A1 (fr) 1989-11-03 1991-05-16 Robert Bosch Gmbh Recepteur radio, en particulier autoradio
EP0446985A1 (fr) * 1990-03-07 1991-09-18 Koninklijke Philips Electronics N.V. Procédé de transmission de signaux de système de données de radio avec identification de programmes routiers et récepteur pour ces signaux de système de données de radio
EP0539708A2 (fr) * 1991-10-31 1993-05-05 Robert Bosch Gmbh Récepteur de radiodiffusion, en particulier récepteur pour véhicules
EP0586897A1 (fr) * 1992-09-10 1994-03-16 Robert Bosch Gmbh Procédé de sélection d'annonces selon l'itinéaraire emprunté dans les récepteurs RD
DE4233210A1 (de) * 1992-10-02 1994-04-07 Bosch Gmbh Robert Rundfunkempfänger

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866576A2 (fr) * 1997-03-20 1998-09-23 GRUNDIG Aktiengesellschaft Récepteur RDS pour l'évaluation de messages d'information routière
EP0866576A3 (fr) * 1997-03-20 2000-08-30 GRUNDIG Aktiengesellschaft Récepteur RDS pour l'évaluation de messages d'information routière
EP1022704A1 (fr) * 1999-01-22 2000-07-26 Rover Group Limited Système d'informations routier pour véhicules
US8023914B2 (en) 2007-01-31 2011-09-20 Qlada Corporation Method for determining region where broadcasting receiver is located
FR2928795A1 (fr) * 2008-03-12 2009-09-18 Qisda Corp Procede de determination d'une region dans laquelle se situe un recepteur de radiodiffusion
EP2903188A1 (fr) * 2014-01-29 2015-08-05 Continental Automotive GmbH Système et procédé de reconnaissance de régions géographiques pour récepteur mobile et procédé

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