EP0847154B1 - Méthode et dispositif pour transmettre des messages avec un débit variable comme un signal RDS - Google Patents

Méthode et dispositif pour transmettre des messages avec un débit variable comme un signal RDS Download PDF

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Publication number
EP0847154B1
EP0847154B1 EP19970116921 EP97116921A EP0847154B1 EP 0847154 B1 EP0847154 B1 EP 0847154B1 EP 19970116921 EP19970116921 EP 19970116921 EP 97116921 A EP97116921 A EP 97116921A EP 0847154 B1 EP0847154 B1 EP 0847154B1
Authority
EP
European Patent Office
Prior art keywords
messages
rds
cycle
groups
marked
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.)
Expired - Lifetime
Application number
EP19970116921
Other languages
German (de)
English (en)
Other versions
EP0847154A3 (fr
EP0847154A2 (fr
Inventor
Heinrich Schmidt
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
Publication of EP0847154A2 publication Critical patent/EP0847154A2/fr
Publication of EP0847154A3 publication Critical patent/EP0847154A3/fr
Application granted granted Critical
Publication of EP0847154B1 publication Critical patent/EP0847154B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/16—Arrangements for broadcast or for distribution of identical information repeatedly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/55—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]

Definitions

  • the invention relates to a method and a device for transmitting messages with fluctuating volumes as radio-data signals (RDS), in which specially designated groups are provided for the messages.
  • RDS radio-data signals
  • the Radio Data System enables additional and inaudible transmission of digital data in parallel to broadcast programs in one data channel.
  • Specifications of the radio data system for VHF radio are inter alia in the publication Tech. 3244 - E, March 1984 of the European Union Broadcasting Union (EBU).
  • Radio receivers with suitable RDS decoders can record and decode transmitted data in addition to audio reception with the same receiver.
  • For data transmission 32 groups of 104 bits each are provided, with each of the transmitted groups being assigned a specific service. Group 8a is currently for the transmission of digitally coded traffic announcements.
  • a traffic announcement can be encoded in the form of up to five 8A groups.
  • the ALERT-C protocol used for coding permits up to four 8A groups per RDS cycle, which consists of a total of twelve groups. Therefore, in order for enough transmission capacity to be available for other services, broadcasters generally limit the number of 8A groups to only one 8A group per RDS cycle.
  • the transmission of the coded traffic reports is repeated cyclically in order to give newly added receivers access to the message inventory. The period required for the transmission of all coded traffic messages is therefore called the TMC cycle.
  • the messages are repeated to increase transmission reliability both directly and within the cycle.
  • the frequency of repetition is proportional to the priority of the message, that is, a wrong message is repeated more frequently than a jobsite message.
  • one 8A group per RDS cycle is sufficient for the transmission of all messages.
  • the addition of a high-priority message leads to a strong delay in the remaining messages.
  • the available channel capacity is insufficient in such cases.
  • the object of the present invention is therefore to provide more RDS channel capacity for the transmission of digitally coded traffic reports (TMC messages) in these special cases.
  • This object is achieved in the method according to the invention in that the number of specially designated groups per RDS cycle between a minimum and a maximum allowable number is variable and that the number depending on the occurrence of the messages and / or from The amount of messages flagged as urgent.
  • the inventive method has the advantage that the service provider can better exploit the scarce RDS channel capacity and that the channel for the TMC messages need not be sized for the highest expected number of traffic reports.
  • the method according to the invention can be used for various messages with fluctuating volumes, such as radio text, paging and for transparent data channels.
  • the messages are digitally encoded traffic announcements (TMC messages) and that the specially designated groups are 8A groups, it is preferred that the number of 8A groups per RDS cycle be between one and four is changeable and / or that the urgent messages are X-messages.
  • a further development of the method according to the invention is that, after receipt of a message intended for transmission, it is checked whether this message is marked as urgent, if appropriate the number of specially marked groups per cycle is increased, if the maximum permissible number has not already been reached, and that it does not check, if appropriate, whether a message marked as urgent should be deleted, reducing, if appropriate, the number of specially designated groups per RDS cycle.
  • the 8A groups additionally programmed in the RDS cycle can be regarded as a special channel which is only used by high-priority messages. This allows the service provider to guarantee a minimum access time for these types of messages, which is independent of the particular message inventory.
  • the object is achieved in that the messages are supplied to the cycle generator and that in the cycle generator means for Detecting the occurrence of messages and / or the occurrence of messages marked as urgent and generating RDS cycles, the number of specially marked groups per RDS cycle between a minimum and a maximum allowed number depending on the occurrence of the messages and / or the occurrence of messages marked as urgent.
  • the maximum number of 8A groups tolerated by the broadcaster is set in the RDS cycle. This number is a maximum of four, but may also be in the implementation of the invention two or three. From the cycle generator only one of these groups is used in case of weak message volume. The unused 8A groups are skipped in the RDS cycle, which is an already known feature of the RDS coder.
  • the cycle generator If a high-priority message - a so-called X-message, as eXtrem urgent - in the TMC cycle recorded (Fig. 1), the cycle generator generates twice as many 8A groups per unit time as before and reached so that now in the RDS -Coder another 8A group is used for the transmission.
  • the RDS cycle is now temporarily made up of thirteen groups. If this capacity is insufficient, the cycle generator can increase this number dynamically up to the maximum number of predefined 8A groups in the RDS cycle. After deleting the X-message or when the number of messages is reduced, the required channel capacity can be gradually reduced to the normal level by the cycle generator.
  • radio data signals are schematically illustrated over a period of about six seconds, with the non-hatched sections representing other than 8A groups. 11.4 groups / s will be sent. Cross-hatching indicates 8A groups while skipped 8A groups are hatched horizontally. A 4A group, which is hatched vertically, includes a minute mark.
  • X mode means that more than one 8A group is inserted into the data stream compared to normal mode.
  • the message is inserted into the message list or deleted at 10. Then it is queried at 11 whether there are further messages. If applicable, the program will be at 2 repeated, otherwise at 12 ended.
  • RDS cycle generator 14 schematically shows a device for carrying out the method according to the invention with an RDS cycle generator 14 and an RDS coder 15.
  • the RDS coder is supplied with various messages to be sent, for which inputs 17 are provided for messages other than TMC messages.
  • the TMC messages are first fed from the input 16 to the RDS cycle generator 14, the function of which is known per se but has been extended by the functions described in connection with FIG.
  • the RDS cycles are thus supplied to the RDS cycles thus adapted to the message volume.
  • the coded RDS signals may be extracted and fed to a transmitter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Circuits Of Receivers In General (AREA)

Claims (6)

  1. Procédé pour transmettre des messages avec un débit variable comme des signaux RDS, des groupes caractérisés spéciaux étant prévus pour les messages,
    caractérisée en ce que
    le nombre de groupes caractérisés spéciaux par cycle RDS peut passer d'un nombre minimal autorisé à un nombre maximal autorisé, et le nombre est augmenté ou diminué en fonction du débit des messages et/ou du débit des messages caractérisés comme urgents.
  2. Procédé selon la revendication 1,
    caractérisée en ce que
    les messages sont des messages de trafic codés numériquement (TMC) et en ce que les groupes caractérisés spéciaux sont des groupes 8A.
  3. Procédé selon la revendication 2,
    caractérisée en ce que
    le nombre de groupes 8A par cycle RDS peut passer de un à quatre.
  4. Procédé selon l'une des revendications 2 à 3,
    caractérisée en ce que
    les messages caractérisés comme urgents sont des messages X.
  5. Procédé selon l'une des revendications précédentes,
    caractérisée en ce qu'
    après l'entrée d'un message devant être émis, on vérifie s'il est caractérisé comme urgent, dans l'affirmative le nombre de groupes caractérisés spéciaux par cycle est augmenté si le nombre maximal autorisé n'est pas déjà atteint, et si ce n'est pas le cas on vérifie si un message caractérisé comme urgent doit être effacé, le nombre de groupes caractérisés spéciaux par cycle RDS étant diminué dans l'affirmative.
  6. Dispositif pour transmettre des messages avec un débit variable comme des signaux RDS, des groupes caractérisés spéciaux étant prévus pour les messages, un codeur RDS (15) étant commandé par un générateur de cycle (14) qui caractérise les groupes de signaux RDS en fonction de leur affectation,
    caractérisé en ce que
    les messages peuvent être amenés au générateur de cycle (14) et des moyens pour détecter le débit des messages et/ou le débit des messages caractérisés comme urgents et pour créer des cycles RDS sont prévus dans le générateur de cycle (14), le nombre de groupes caractérisés spéciaux par cycle RDS pouvant être diminué ou augmenté d'un nombre minimal à un nombre maximal autorisé en fonction du débit des messages/et/ou du débit des messages caractérisés comme urgents.
EP19970116921 1996-12-05 1997-09-30 Méthode et dispositif pour transmettre des messages avec un débit variable comme un signal RDS Expired - Lifetime EP0847154B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996150429 DE19650429A1 (de) 1996-12-05 1996-12-05 Verfahren und Einrichtung zum Senden von Meldungen mit schwankendem Aufkommen als Radio-Daten-Signale
DE19650429 1996-12-05

Publications (3)

Publication Number Publication Date
EP0847154A2 EP0847154A2 (fr) 1998-06-10
EP0847154A3 EP0847154A3 (fr) 2000-05-10
EP0847154B1 true EP0847154B1 (fr) 2006-01-11

Family

ID=7813707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970116921 Expired - Lifetime EP0847154B1 (fr) 1996-12-05 1997-09-30 Méthode et dispositif pour transmettre des messages avec un débit variable comme un signal RDS

Country Status (3)

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EP (1) EP0847154B1 (fr)
DE (2) DE19650429A1 (fr)
ES (1) ES2255092T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1586187A1 (fr) * 2003-01-23 2005-10-19 Matsushita Electric Industrial Co., Ltd. Appareil de transmission de donnees media et appareil de reception de donnees media

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9023307D0 (en) * 1990-10-25 1990-12-05 British Broadcasting Corp Multichannel operation of rds

Also Published As

Publication number Publication date
DE59712544D1 (de) 2006-04-06
EP0847154A3 (fr) 2000-05-10
ES2255092T3 (es) 2006-06-16
EP0847154A2 (fr) 1998-06-10
DE19650429A1 (de) 1998-06-10

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