EP0847154A2 - 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
EP0847154A2
EP0847154A2 EP97116921A EP97116921A EP0847154A2 EP 0847154 A2 EP0847154 A2 EP 0847154A2 EP 97116921 A EP97116921 A EP 97116921A EP 97116921 A EP97116921 A EP 97116921A EP 0847154 A2 EP0847154 A2 EP 0847154A2
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.)
Granted
Application number
EP97116921A
Other languages
German (de)
English (en)
Other versions
EP0847154A3 (fr
EP0847154B1 (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 to send messages with fluctuating traffic as Radio data signals (RDS), for which the messages specially marked groups are provided.
  • RDS Radio data signals
  • Radio data system an additional and inaudible transmission of digital data parallel to Broadcast programs in a data channel.
  • Specifications of the radio data system for FM radio are among others in the publication Tech. 3244-E, March 1984 of the European Runfunk Union (EBU).
  • Radio receivers with suitable RDS decoders can transmitted data in addition to audio reception with the Record and decode the same receiver.
  • For the Data transmission is 32 groups of 104 bits each provided, each of the transmitted groups one each certain service is assigned.
  • Group 8a is for Time for the transmission of digitally coded Traffic announcements provided
  • a traffic announcement can take the form of up to five 8A groups be encoded.
  • the ALERT-C protocol used for coding allows up to four 8A groups per RDS cycle that is off there are a total of twelve groups. Enough with that Transmission capacity available for other services stands, the broadcasters therefore limit the number of the 8A groups usually only one 8A group per RDS cycle.
  • the transmission of coded traffic reports is repeated cyclically in order to also add new ones Give recipients access to the inventory. The one for the transmission of all coded traffic reports The necessary time period is therefore called the TMC cycle.
  • the messages are used to increase transmission security repeated both directly and within the cycle.
  • the Repetition frequency is proportional to the priority of Notification, that is, an incorrect driver notification is becoming more common repeated as a site report.
  • 8A group per RDS cycle sufficient for the transmission of all messages.
  • With big Evolution leads to the addition of a highly prioritized Report, however, to a strong delay in the remaining messages.
  • the available channel capacity per RDS cycle insufficient in such cases.
  • the object of the present invention is therefore in these Special cases more RDS channel capacity for broadcasting the digitally coded traffic reports (TMC reports) for To make available.
  • This object is achieved in the method according to the invention solved in that the number of specially marked Groups per RDS cycle between a minimum and a maximum permissible number is changeable and that the number depending on the volume of messages and / or on Occurrence of messages marked as urgent is raised or lowered.
  • the inventive method has the advantage that Service providers the scarce RDS channel capacity better and that the channel for the TMC messages cannot for the highest expected number of traffic reports needs to be dimensioned.
  • the inventive method can for different Messages with fluctuating volumes, such as Radio text, paging and for transparent data channels will.
  • a preferred application is that the messages are digitally coded traffic reports (TMC messages) are and that the specially marked Groups are 8A groups, preferably providing that the number of 8A groups per RDS cycle is between one and four is changeable and / or that as urgent marked messages are X messages.
  • a RDS coder is controlled by a cycle generator that the Groups of radio data signals according to their Indicates intended use
  • the task becomes solved that the messages can be fed to the cycle generator and that in the cycle generator means for detecting the Volume of reports and / or volume of as urgently marked messages and for the generation of RDS cycles are provided, the number of specifically labeled groups per RDS cycle between one minimum and a maximum permissible number depending of the occurrence of the reports and / or the occurrence of as urgently marked messages up or is reduced.
  • the cycle generator is used by these groups weak message volume only one used. They don't used 8A groups are skipped in the RDS cycle, what an already defined known property of the RDS encoder is.
  • a high-priority message - a so-called X message like eXtrem urgently - in the TMC cycle recorded (Fig. 1)
  • the cycle generator generates initially twice as many 8A groups per time unit as previously and so achieved that now another in the RDS coder 8A group is used for the transmission.
  • the RDS cycle now consists of thirteen groups. Enough this capacity is not sufficient, the cycle generator can do this Number dynamic up to the maximum number of predefined ones Increase 8A groups in the RDS cycle. After deleting the X message or if the number of reports decreases, the required channel capacity through the cycle generator again be gradually lowered to the normal level.
  • Figures 1 and 2 are over a period of about six seconds schematically represented radio data signals, the non-hatched cuts other than 8A groups represent. 11.4 groups / s are sent. With a cross hatching is marked 8A groups, while skipped 8A groups are hatched horizontally are. A 4A group that is hatched vertically, includes a minute mark.
  • Fig. 3 shows a flow chart for explaining a Embodiment of the method according to the invention, wherein after a start 1 at 2 a message from one Communication unit read into the cycle generator and is decoded. At 3 it is checked whether the message is a Urgency indicator (X-urgent). Is this the case, the program branches at 4 depending whether the X mode has been activated.
  • X mode means that compared to the normal mode more than one 8A group in the Data stream is inserted.
  • Fig. 4 shows schematically a device for implementation the inventive method with a RDS cycle generator 14 and an RDS coder 15.
  • the RDS coder various messages to be sent are fed, for what Inputs 17 for messages other than TMC messages are provided.
  • the TMC messages are sent from input 16 first fed to the RDS cycle generator 14, the Function is known per se, but related to that with functions described with FIG. 3 was expanded.
  • RDS cycle generator 14 are the RDS coder to the RDS cycles adapted to the volume of messages.
  • the coded RDS signals can be taken from a transmitter be fed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Circuits Of Receivers In General (AREA)
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 true EP0847154A2 (fr) 1998-06-10
EP0847154A3 EP0847154A3 (fr) 2000-05-10
EP0847154B1 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)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004066583A1 (fr) * 2003-01-23 2004-08-05 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004066583A1 (fr) * 2003-01-23 2004-08-05 Matsushita Electric Industrial Co., Ltd. Appareil de transmission de donnees media et appareil de reception de donnees media

Also Published As

Publication number Publication date
DE19650429A1 (de) 1998-06-10
EP0847154A3 (fr) 2000-05-10
DE59712544D1 (de) 2006-04-06
ES2255092T3 (es) 2006-06-16
EP0847154B1 (fr) 2006-01-11

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