EP0900432A1 - Procede et recepteur pour la selection geographique de messages codes numeriquement - Google Patents

Procede et recepteur pour la selection geographique de messages codes numeriquement

Info

Publication number
EP0900432A1
EP0900432A1 EP98912263A EP98912263A EP0900432A1 EP 0900432 A1 EP0900432 A1 EP 0900432A1 EP 98912263 A EP98912263 A EP 98912263A EP 98912263 A EP98912263 A EP 98912263A EP 0900432 A1 EP0900432 A1 EP 0900432A1
Authority
EP
European Patent Office
Prior art keywords
selection information
information
selection
messages
receiver
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
EP98912263A
Other languages
German (de)
English (en)
Other versions
EP0900432B1 (fr
Inventor
Dietmar Kell
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 EP0900432A1 publication Critical patent/EP0900432A1/fr
Application granted granted Critical
Publication of EP0900432B1 publication Critical patent/EP0900432B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/092—Coding or decoding of the information
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/093—Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
    • 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 for the geographical selection of digitally coded messages which are broadcast by a plurality of transmitters and contain location information which is compared in receivers with selection information which is dependent on the respective position of the receivers, and a receiver with a device for the selection of digitally coded messages .
  • Spoken traffic announcements have been known for a long time to inform motorists. These have various disadvantages, for example delays and inaccuracies, which are associated with the manual and thus also subjective recording and forwarding of the information. So it happens, for example, that a driver gets into a traffic jam that has not (yet) been announced, or that, despite a traffic jam warning, he can drive on the road in question relatively trouble-free when he arrives at the designated point. A more precise recording and faster transmission has become possible with the aid of the system for the transmission of digitally coded traffic reports that has become known in recent years.
  • Digitally coded traffic reports - hereinafter also referred to as TMC messages - can be transmitted using the radio data system (RDS), which enables additional and inaudible transmission of digital data in parallel with radio programs in a data channel.
  • RDS radio data system
  • Specifications of the radio data system for VHF radio can be found in Tech. 3244 - E, March 1984 of the European Runfunk Union (EBU). Broadcast receivers with suitable RDS decoders can record and decode transmitted data in addition to audio reception with the same receiver.
  • TMC system When the TMC system is introduced, a very large number of TMC messages can be expected, of which only a small part is of interest to the respective driver.
  • An essential quality feature of future recipients for Digitally coded messages will therefore be used to filter out or select the messages relevant to the driver from the large number of messages received, and thus to protect the driver from information overload.
  • a position-related selection is advantageous, but requires knowledge of the position of the recipient, that is, the vehicle.
  • the position possibly also an approximate position.
  • the position can be entered manually using area and route codes, which is too inflexible and cumbersome for longer journeys.
  • Coupling the RDS / TMC receiver with a navigation system - for example GPS - requires additional technical effort and thus more costs.
  • the object of the present invention is to enable a position-related selection without additional operating effort and with the least possible technical effort.
  • this object is achieved in that the transmitters also transmit selection information which characterizes their respective transmission area and which is compared in the receiver with location information contained in the messages.
  • the method according to the invention uses only the data that is already present in the receiver for decoding the messages.
  • the accuracy achieved is less than that of a navigation system, but it is quite high enough for the selection of messages.
  • a change in the frequency or the program information codes of one or more transmitters is irrelevant for the method according to the invention, as long as those emitted by the transmitter Selection information is retained.
  • the method can be used particularly advantageously with receivers of this type which automatically search for stations and tune reception conditions to the strongest station of a desired program.
  • the method according to the invention can also be used in so-called one-tuner devices since no field strength measurements have to be carried out on other frequencies.
  • the service can also be selected on the basis of the selection information, in particular the area codes. If the system knows the destination of the trip, for example, it can select the TMC service whose area code contains the destination, since this ensures that all messages relevant to the route are selected.
  • the method is also not dependent on certain RDS details and can also be used on other transmission media, e.g. DAB, AMDS.
  • the selection information is location codes from areas defined for the coding and decoding of the messages, which at least partially fall within the transmission range.
  • These location codes - also referred to below as area codes - can be used directly by the recipient as a selection criterion, since all the locations defined for the coding and decoding of the messages are referenced to such area codes. That means: only those messages pass the filter whose primary or secondary location is within the area defined by the area code.
  • a second embodiment of the method according to the invention is that the selection information is coordinates and radii of the transmission areas. The radius simplifies the range of the respective transmitter. In order to use this selection information in the receiver, the location coordinates for each location code must also be saved. Since this is also a prerequisite for a graphical representation of the traffic situation, such data are often already included in the list of locations and can also be used for the method according to the invention.
  • the second configuration may be more advantageous, since the area of coverage could only be described inaccurately either by specifying a large area (federal state) or with many small areas. Since each code requires 16 bits of transmission capacity, the decision to make the imprecise solution will often be made when determining the sender.
  • the accuracy is greatest.
  • the same selection information it is also possible for the same selection information to be broadcast in each case by a group of transmitters.
  • the selection information and reference information for the selection information are transmitted in system messages of a data stream containing the digitally coded messages.
  • the TMC signal according to ALERTC contains four system messages, which are differentiated by the first two bits of block C.
  • the first of these variants with code 00 can be used for transmission in this development the selection information is used. It is preferably provided that the following information is transmitted in a first data block: an identifier that selection information is transmitted, the number of a location list required for decoding the messages in the receiver and information about the type of selection information.
  • the information about the type of selection information is also transmitted by a bit, which indicates whether the Selection information consists of location codes of areas or coordinates and radii.
  • the first data block also transmits how many location codes are followed by areas. A location code of an area can be transmitted in at least one further data block.
  • the development of the method according to the invention can be designed such that the radius is transmitted in the first data block and the coordinates are transmitted in a further data block.
  • a receiver according to the invention with a device for the selection of digitally coded messages which are broadcast by a plurality of transmitters, contain location information and are selected in the receiver according to selection information dependent on the respective position of the receiver, the object according to the invention is achieved in that the receiver also has a Device for receiving selection information which is broadcast by transmitters and characterizes the transmission range of the respective transmitter, and a facility for comparing the
  • the size of the selection area can be reduced by using the intersection of the selection information received for selection when receiving several transmitters with overlapping selection information.
  • FIG. 1 is a block diagram of a receiver according to the invention
  • FIG. 5 shows a flowchart for the selection of messages based on received selection information.
  • the receiver shown in FIG. 1 has an antenna 1, a receiver 2, a stereo decoder 4, an LF amplifier 5 and power amplifiers 6, 7 and loudspeakers 8, 9 in a manner known per se.
  • the stereo multiplex signal emitted by the receiving part 2 becomes in addition to the stereo decoder 4 fed to an RDS decoder 3, the output of which is connected to a microcomputer 13.
  • the microcomputer 13 is used for decoding, management, preparation for the reproduction and selection of the TMC messages.
  • a keyboard 14 and a display device (display) 15 are connected to the microcomputer 13.
  • the selected TMC messages can be output either via the display 15 or as a voice output, for which purpose the microcomputer 13 is connected to an input 10 of the LF amplifier 5 via a speech synthesizer 16.
  • Figures 2a and 2b each show system messages from two blocks C and D according to the TMC specifications, in which the first two bits are set to 00, which in the exemplary embodiment is intended to mean that these system messages for the transmission of the
  • Selection information can be used. For this purpose, 30 bits are initially available in block C.
  • the 6 bits following 00 represent a location table number LTN (location list number), since according to TMC specifications different location lists are possible and the method according to the invention takes this into account.
  • LTN location list number
  • An area code is transmitted in the following data block D of 16 bits, namely the location code of an area located in the location list mentioned in LTN.
  • the X coordinate and Y coordinate are transmitted with 8 bits each. The area covered by the location list is thus divided into 256x256 fields. These can then be addressed individually using the X and Y coordinates.
  • FIG. 3 schematically shows the travel of a vehicle from a point A to a point B.
  • the vehicle comes within range of the transmitters x, y, z and passes through the areas G1 to G7.
  • the vehicle After the start of the journey, the vehicle first comes into the transmission range of transmitter x. Its transmission area is covered by the area codes G1 to G6, so that all messages from this area are selected.
  • the receiver switches to transmitter y, which is now more receivable. This indicates areas G2, G3, G5 and G6 as transmission areas. By comparing with the areas of the still receivable transmitter x, the receiver can now narrow the selection to the areas G2 and G3 and only outputs messages for these areas.
  • the vehicle leaves the area of the transmitter y, but now finds the transmitter z. Although it is weaker to receive than the transmitter x, the chooses Receiver this transmitter because the target point E is in area 7 and only the transmitter z references this area. The selection then only takes into account the messages from areas G3 and G4, which corresponds to the intersection of the areas specified by transmitters x and z. From point D, additional messages from the target area are selected, since the transmitter x can no longer be received and the intersection is therefore no longer required.
  • FIG. 4 shows a flowchart for evaluating received selection information, which will also be called selection codes in the following.
  • Communication unit picked up and decoded.
  • it is a branch depending on whether it is a group of selection codes SC. If this is not the case, ie if there is a normal TMC message, it is decoded at 24 and selected at 25 according to the selection table currently in memory. This selection table is the result of selection codes received previously.
  • an 8A group is fetched and decoded in the program part 22 by the communication unit and, in turn, checked at 23 whether it is a group of selection codes SC. If this is the case, it is checked at 28 whether the bit CID (FIG. 2) is set to 0 or 1. If the bit CID is 0, the selection codes contain location codes with which the selection table is updated at 29.
  • TJ TJ>CO> UA X XI CO • H • r ⁇ XJ rö 3> T) TJ CO XI ⁇ 2 Oi ⁇ W o P> TJ TJ
  • the program continues at 47. However, if the location is outside the area, the message is marked as not selected at 49.

Landscapes

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

Abstract

L'invention concerne un procédé et un récepteur pour la sélection géographique de messages codés numériquement qui sont émis par plusieurs émetteurs et contiennent des informations locales qui sont, dans des récepteurs, comparées avec des informations de sélection dépendant de la position respective de chaque récepteur. Selon l'invention, il est prévu que les émetteurs émettent en outre des informations de sélection identifiant leur zone d'émission respective, lesquelles sont comparées, dans le récepteur, avec les informations locales contenues dans les messages.
EP98912263A 1997-03-15 1998-02-18 Procede et recepteur pour la selection geographique de messages codes numeriquement Expired - Lifetime EP0900432B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19710863A DE19710863A1 (de) 1997-03-15 1997-03-15 Verfahren und Empfänger zur geographischen Selektion von digital codierten Meldungen
DE19710863 1997-03-15
PCT/DE1998/000473 WO1998041959A1 (fr) 1997-03-15 1998-02-18 Procede et recepteur pour la selection geographique de messages codes numeriquement

Publications (2)

Publication Number Publication Date
EP0900432A1 true EP0900432A1 (fr) 1999-03-10
EP0900432B1 EP0900432B1 (fr) 2003-09-03

Family

ID=7823538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98912263A Expired - Lifetime EP0900432B1 (fr) 1997-03-15 1998-02-18 Procede et recepteur pour la selection geographique de messages codes numeriquement

Country Status (4)

Country Link
EP (1) EP0900432B1 (fr)
JP (1) JP2000510987A (fr)
DE (2) DE19710863A1 (fr)
WO (1) WO1998041959A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036771A1 (fr) * 1998-12-14 2000-06-22 Mannesmann Ag Systeme de transmission binaire
DE19930780A1 (de) * 1999-07-03 2001-01-18 Bosch Gmbh Robert Verfahren zum Empfang von digitalen Signalen über ein Funknetz und Empfangsvorrichtung für über Funkkanäle übertragene digitale Signale
DE10015935A1 (de) * 2000-03-30 2001-10-04 Bosch Gmbh Robert Verfahren zur Übertragung einer Position einer Verkehrsinformation, insbesondere einer Verkehrsstörung
DE10015765A1 (de) * 2000-03-30 2001-10-04 Mannesmann Vdo Ag Verfahren zur Auswahl eines Rundfunksenders für dynamische Fahrzeugnavigation
KR20060119746A (ko) 2005-05-18 2006-11-24 엘지전자 주식회사 교통상태에 대한 정보를 제공하고 이를 이용하는 방법 및장치
KR101061460B1 (ko) 2005-05-18 2011-09-02 엘지전자 주식회사 소통상태에 대한 예측정보를 제공하고 이를 이용하는 방법및 장치
KR20060119742A (ko) * 2005-05-18 2006-11-24 엘지전자 주식회사 도로 정보를 제공하고 이를 이용하는 방법 및 장치
WO2008083862A1 (fr) 2007-01-10 2008-07-17 Tomtom International B.V. Procédé permettant d'indiquer les retards de trafic, programme informatique et système de navigation afférent
WO2008083744A1 (fr) * 2007-01-10 2008-07-17 Tomtom International B.V. Dispositif et procédé de navigation pour affichage d'un document à con tenu riche
DE102007013561A1 (de) * 2007-03-21 2008-09-25 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben eines Navigationssystems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926180A1 (de) * 1989-08-08 1991-02-14 Bosch Gmbh Robert Verfahren zur fahrtroutenselektiven wiedergabe digital codierter, von einem sender zu einem fahrzeugempfaenger uebertragener verkehrsnachrichten sowie fahrzeugempfaenger
NL9000533A (nl) * 1990-03-07 1991-10-01 Philips Nv Werkwijze voor de overdracht van radio-data-systeemsignalen met verkeersprogramma-identificatie en ontvanger voor dergelijke radio-data-systeemsignalen.
FR2689667B1 (fr) * 1992-04-01 1995-10-20 Sagem Recepteur de bord d'aide a la navigation d'un vehicule automobile.
DE4230294A1 (de) * 1992-09-10 1994-03-17 Bosch Gmbh Robert Verfahren zur Auswahl routenrelevante Meldungen bei RDS Radios
DE4445582C2 (de) * 1994-12-20 2002-05-29 Deutsche Automobilgesellsch Verfahren und Einrichtung zur Ausgabe von Verkehrsstörungsmeldungen in einem Fahrzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9841959A1 *

Also Published As

Publication number Publication date
DE59809470D1 (de) 2003-10-09
WO1998041959A1 (fr) 1998-09-24
DE19710863A1 (de) 1998-09-17
EP0900432B1 (fr) 2003-09-03
JP2000510987A (ja) 2000-08-22

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