EP0274650B1 - Système de transmission bidirectionnel d'informations entre une station de contrôle au sol et une station mobile - Google Patents

Système de transmission bidirectionnel d'informations entre une station de contrôle au sol et une station mobile Download PDF

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Publication number
EP0274650B1
EP0274650B1 EP87117888A EP87117888A EP0274650B1 EP 0274650 B1 EP0274650 B1 EP 0274650B1 EP 87117888 A EP87117888 A EP 87117888A EP 87117888 A EP87117888 A EP 87117888A EP 0274650 B1 EP0274650 B1 EP 0274650B1
Authority
EP
European Patent Office
Prior art keywords
frequency
mhz
station
output
pilot
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
EP87117888A
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German (de)
English (en)
French (fr)
Other versions
EP0274650A1 (fr
Inventor
Jacques Mainardi
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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Filing date
Publication date
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Priority to AT87117888T priority Critical patent/ATE85565T1/de
Publication of EP0274650A1 publication Critical patent/EP0274650A1/fr
Application granted granted Critical
Publication of EP0274650B1 publication Critical patent/EP0274650B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/16—Continuous control along the route
    • B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
    • B61L3/227—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation using electromagnetic radiation

Definitions

  • the invention relates to a bidirectional information transmission system between a mobile station and a ground control station; by information it must be understood that these are analog and / or digital signals, corresponding generally to sounds, images, instructions, measurements, etc.
  • the mobile station which travels along a known path is for example a train, a funicular, an elevator, a motor car, an enclosure monitoring cart, etc., and the control station is fixed, on the ground .
  • the transmissions are made for example using a waveguide arranged along the path followed by the mobile station provided with a transmitting and receiving antenna moving along the waveguide.
  • a waveguide transmission device can be found in the publication "Wave guide communication system for centralized railway traffic control” by T. KAWAKAMI et al, IEEE trans. on vehicular communications, Sept. 1964, p.1-18.
  • the object of the invention is to avoid such interference.
  • the invention also aims to transmit, in each direction of ground / vehicle transmission, a signal allowing the control of transmissions in each direction.
  • the subject of the invention is a bidirectional information transmission system between a ground control station connected to a waveguide and a mobile station of a vehicle connected to an antenna moving along the waveguide, each station comprising a transmitter / receiver unit, the stations transmitting in different frequency bands and the ground station transmitting in the band with the highest frequencies, characterized in that each transmitter / receiver unit comprises a pilot generator delivering a pilot frequency, a microwave generator delivering a frequency carrier multiple of the pilot frequency, a coupler connected as an input to the microwave generator and having an output connected to a transmit mixer and another output connected to a receive mixer, circuits transmitters each connected to the pilot generator and each delivering a frequency subcarrier multiple of the pilot frequency, the subcarriers having different frequencies, regularly spaced, the frequency difference between two successive subcarriers being equal to the pilot frequency and the frequencies of the subcarriers being less than the frequency of the carrier , a transmitting coupler connected at the input to the transmitting circuits and at the output at the transmitting mixer, a circulator connected to
  • the various signals to be transmitted are synchronized with one another and frequency controlled.
  • a pilot frequency fp equal to the difference in frequency between the image carrier and the sound carrier in television is used.
  • this difference is 6.5 MHz; the transmission system is therefore controlled by this frequency or its multiples.
  • the invention also provides for the transmission in each direction of a safety signal serving for the control of transmissions, this safety signal being an unmodulated carrier, of well defined frequency.
  • the various transmissions currently defined relate to images (television), the accompanying sound of images (television sound), sounds in general and in particular telephone conversations, data in digital form, in particular for exchanges of instructions, data, or orders between the ground station and the vehicles, the safety signal.
  • the multiplex sound channel transmits the various sounds, in particular the transmission of telephone conversations, according to a multiplexing technique, and for example according to the well known pulse modulation and coding technique, MIC.
  • the different carriers are separated by a constant difference equal to fp, pilot frequency, the carrier of the safety signal having the highest frequency.
  • the channel allocated to vehicle / ground transmissions is between 2411.5 MHz and 2444 MHz, the video channel being at 2418 MHz, and the channel assigned to ground / vehicle transmissions is between 2457 MHz and 2489.5 MHz, the video channel being at 2463.5 MHz.
  • Each of the different frequencies of the transmission channels of each channel is obtained by the addition of an intermediate frequency called a subcarrier, with a frequency F of a carrier delivered by a microwave generator, the frequencies of the subcarriers and the frequency F being multiples of the pilot frequency fp.
  • these intermediate frequencies will be located in VHF band III, and CATV super-band (CATV for community antenna Television), or in UHF bands IV and V.
  • CATV community antenna Television
  • UHF IV and V bands will be used, so that the intermediate frequencies will be of the order of 600 MHz.
  • the intermediate frequencies will be; 572 MHz, 578.5 MHz, 585 MHz, 591.5 MHz and 598 MHz, the intermediate frequency of 572 MHz being that of the video channel.
  • the intermediate frequencies will be: 617.5 MHz, 624 MHz, 630.5 MHz, 637 MHz and 643.5 MHz, the intermediate frequency of 617.5 MHz being that of the video channel.
  • the frequency F of the microwave carrier is then 1846 MHz for each direction of transmission, which gives a central frequency Fo of 2450.5 MHz.
  • the safety signal subcarrier is used in each direction of transmission so that an automatic gain control circuit delivers a port voltage at said subcarrier, the level of which has undergoes the same fluctuations as the levels of the other subcarriers which are transmitted in the same channel.
  • FIG. 1 schematically represents a transmitter / receiver assembly of a ground station, connected to a waveguide 25 disposed along a railway track, 26 representing an antenna of a railway vehicle, said antenna moving along of the waveguide.
  • the transmission mixer MTX is connected to a transmission coupler 18 from which it receives signals each carried by a subcarrier; the MRX reception mixer is connected to a reception coupler 27 to which it delivers signals carried by subcarriers of the vehicle.
  • the transmission mixer MTX receives the frequency signal F from the coupler 22 and signals from the transmission coupler 18, the frequencies of the subcarriers of these signals being lower than the frequency F of the microwave signal; these frequencies are for example located in the V band of the UHF frequencies.
  • the frequency of each signal delivered by the emission coupler is added to the frequency F, and the resulting signals are delivered to the circulator 24 which directs them to the waveguide 25.
  • the frequency of each signal is likewise added to the frequency F and the resulting signals are transmitted by the antenna 26 and transmitted by the waveguide 25 to the circulator 24 of the ground station, which directs them to the reception mixer.
  • This pilot frequency is distributed by a coupler 2 to phase comparators, 8, 9, 10, 11, 12 and 20 of any known type, and for example of the MC 14152 type from the company MOTOROLA.
  • the phase comparators 8 to 12 are connected at output to oscillator circuits 3 to 7, respectively, these oscillator circuits each having a modulation input and being for example of the TDA 5660 type from the company SIEMENS.
  • the frequencies of these oscillator circuits are, for example 617.5 MHz, 624 MHz, 630.5 MHz, 637 MHz, 643.5 MHz; these frequencies are those of the subcarriers, and it will be noted that the subcarrier at 643.5 MHz which corresponds to the safety signal is not modulated.
  • the oscillator circuits 3 and 4 which correspond to the video and accompanying sound channels receive modulation signals corresponding respectively to the image and to the sound; the oscillator circuit 5 which is reserved for multiplex sound is modulated by a multiplex whose channels of a frame are each assigned to a distinct sound channel, such as for example a telephone conversation or the transmission of a sound program.
  • the oscillator circuit 6 assigned to the digital transmission is modulated by a binary coded information multiplex.
  • Each oscillator circuit 3 to 7 is connected at the output to the emission coupler 18 on the one hand, and to the phase comparator which is associated with it by means of a frequency divider 13 to 17 on the other hand.
  • the reception coupler 27 outputs the various modulated subcarriers of the signals transmitted by the vehicle, to receivers 28, 29, 30, 31, 32.
  • the frequencies of these subcarriers are for example 572 MHz for the video channel, 578.5 MHz for a reserve channel, 585 MHz for the multiplex sound channel, 591.5 MHz for the digital channel and 598 MHz for the safety signal channel.
  • the security receiver 28 receives the 598 MHz subcarrier from the security signal and is connected at the output on the one hand to a filter 33 and on the other to an automatic gain control circuit 34.
  • the filter 33 is connected to a frequency divider 35 which is a divider by 92 delivering a safety signal at 6.5 MHz to a control circuit 36.
  • the automatic gain control circuit 34 is connected at output to the receivers 29, 30, 31, 32.
  • the receiver 29 is a conventional television receiver which receives a video signal from the receive coupler 27 on the frequency of 572 MHz.
  • the multiplex sound receiver 30 delivers a digital multiplex to a demultiplexer 38 which delivers the different sound channels on different links, in binary form; the link 39 corresponds to the accompanying audio channel of the video channel and is connected to a decoder 40 which outputs the accompanying sound in analog form at the television receiver 29.
  • the digital receiver 31 delivers information in binary form; receiver 32 is a reserve receiver operating at 578.5 MHz since this frequency is not used by the vehicle for the accompanying sound of the video channel at 572 MHz.
  • FIG. 2 schematically represents a transmitter / receiver assembly of a vehicle, said assembly being connected to the antenna 26 moving along the waveguide 25.
  • a circuit constituted by a circulator 74, a filter 73, a reception mixer MRX1, a coupler 72, a microwave generator 69, a transmission mixer MTX1, a reception coupler 75 and a coupler show 68.
  • the circulator 74 is connected on the one hand to the emission mixer MTX1 and on the other hand to the reception mixer MRX1 by the filter 73; the microwave generator 69 is connected at the output to the coupler 72 itself connected at the output on the one hand to the transmission mixer MTX1 and on the other hand to the reception mixer MRX1; the transmission coupler 68 is connected at the output to the transmission mixer MTX1, and the reception coupler 75 is connected at the input to the reception mixer MRX1.
  • the circulator 74 routes the signals received to the reception mixer MRX1 which, by subtracting the frequency F, delivers the subcarriers at 617.5 MHz, 624 MHz, 630.5 MHz, 637 MHz and 643 to the reception coupler 75. , 5 MHz, with their modulation, only the safety subcarrier at 643.5 MHz not being modulated as indicated in the description of FIG. 1.
  • the reception coupler 75 is connected to a safety receiver 76 which receives the subcarrier at 643.5 MHz, to a television receiver 77 which is a normal television set and receives the subcarriers at 617.5 and 624 MHz corresponding to the video channel and to the accompanying sound channel , to a multiplex sound receiver 78 which delivers a digital multiplex on a link 86, and to a digital receiver 79 which delivers information on a link 87 in binary form.
  • the safety receiver 76 is connected at the output on the one hand to a filter 81 and on the other hand to an automatic gain control circuit 80 itself connected at the output to the receivers 77, 78, 79.
  • the filter 81 is connected to a frequency divider 82 which is a divider by 92 and delivers a signal at 6.5 MHz to a phase comparator 83.
  • An oscillator 85 very stable, of the VCXO type, delivers a signal at 6.5 MHz, this signal being applied to the phase comparator 83, connected as an output to a control input of the oscillator 85 via a filter 84.
  • the oscillator 85 is also connected at the output to a coupler 52 itself connected at the output to phase comparators 58, 59, 60, 61, 62 and 70 of the same type as those of the ground station.
  • the phase compartments 58 to 62 are connected at output to oscillator circuits 53, 54, 55, 56, 57, respectively, these oscillator circuits each having a modulation input and being of the same type as the oscillator circuits of the ground station , and each corresponding to a transmission channel.
  • the frequencies of the oscillator circuits 53 to 57 are, for example, 572 MHz, 578.5 MHz, 591.5 MHz and 598 MHz; these frequencies are those of the subcarriers and it will be noted that the subcarrier at 598 MHz which corresponds to the safety signal is not modulated.
  • the oscillator circuit 53 of subcarrier at 572 MHz corresponds to the video channel; as previously indicated, the accompanying sound is transmitted at the same time as other sounds by the oscillator circuit 55 of subcarrier at 585 MHz corresponding to the multiplex sound channel.
  • the oscillator circuit 54 of subcarrier at 578.5 MHz is therefore not used for the accompanying sound, and is in reserve, or else it may not exist.
  • the oscillator circuit 56 with a subcarrier at 591.5 MHz corresponds to the digital channel and is modulated by a multiplex of binary coded information.
  • the oscillator circuit 57, of subcarrier at 598 MHz corresponds to the safety signal channel and is not modulated.
  • Each oscillator circuit 53 to 57 is connected at the output to the emission coupler 68 on the one hand, and to the phase comparator which is associated with it by means of a frequency divider 63 to 67, on the other hand.
  • the frequency dividers 63 to 67 are dividers by 88, 89, 90, 91, 92, respectively. There is indeed at the output of each divider a signal at 6.5 MHz.
  • the oscillator circuits are five in number, but obviously this number can be different depending on the application, that is to say the type of mobile; for example in the case of enclosure monitoring, the mobile cart can include one or more television cameras, and possibly a digital channel, one or more microphones, but will not include a television set; the safety channel subcarrier always has the highest frequency of all the subcarriers. Of course the number of receivers will be increased accordingly.
  • the frequency F of the microwave carrier can be different from 1846 MHz, while remaining a multiple of the pilot frequency fp.

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  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Radio Relay Systems (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Near-Field Transmission Systems (AREA)
  • Radio Transmission System (AREA)
  • Transmitters (AREA)
EP87117888A 1986-12-08 1987-12-03 Système de transmission bidirectionnel d'informations entre une station de contrôle au sol et une station mobile Expired - Lifetime EP0274650B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87117888T ATE85565T1 (de) 1986-12-08 1987-12-03 Zweiweginformationsuebertragungsanlage zwischen einer ueberwachungsstelle am boden und einer mobilen stelle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617137 1986-12-08
FR8617137A FR2607769B1 (fr) 1986-12-08 1986-12-08 Systeme de transmission bidirectionnel d'informations entre une station au sol et une station sur un vehicule ferroviaire

Publications (2)

Publication Number Publication Date
EP0274650A1 EP0274650A1 (fr) 1988-07-20
EP0274650B1 true EP0274650B1 (fr) 1993-02-10

Family

ID=9341660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117888A Expired - Lifetime EP0274650B1 (fr) 1986-12-08 1987-12-03 Système de transmission bidirectionnel d'informations entre une station de contrôle au sol et une station mobile

Country Status (8)

Country Link
US (1) US4910793A (es)
EP (1) EP0274650B1 (es)
JP (1) JPH0817343B2 (es)
AT (1) ATE85565T1 (es)
CA (1) CA1272762A (es)
DE (1) DE3784155T2 (es)
ES (1) ES2038649T3 (es)
FR (1) FR2607769B1 (es)

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JPH0642638B2 (ja) * 1989-02-09 1994-06-01 株式会社東芝 無線通信装置
US5136225A (en) * 1989-04-14 1992-08-04 Gec Alsthom Sa Device for guiding vehicles on a virtual track
FR2675761B1 (fr) * 1991-04-24 1995-05-19 Sncf Systeme de transmission d'informations entre le sol et des mobiles notamment dans les communications sol-trains.
US5619248A (en) * 1993-07-06 1997-04-08 Plessey Semiconductors Limited Video signal distribution system microwave radio link for transmitting double sideband phase modulated carrier signal
US5768693A (en) * 1995-02-28 1998-06-16 Telecommunications Equipment Corporation Method and apparatus for controlling frequency of a multi-channel transmitter
FR2755338B1 (fr) * 1996-10-24 1999-01-08 Matra Transport International Systeme cellulaire de transmission radioelectrique d'information entre une infrastructure et des mobiles
JP3755262B2 (ja) * 1997-11-14 2006-03-15 三菱電機株式会社 エレベータ信号伝送装置
FR2773424B1 (fr) 1998-01-06 2000-02-04 Alsthom Cge Alcatel Procede de securisation d'une communication entre deux mobiles et emetteur associe
CA2401209A1 (en) * 2000-02-25 2001-08-30 Henry B. Lewin Rail communications system
FR2818385B1 (fr) * 2000-12-15 2004-06-04 Thomson Csf Radar large bande et modulateur, notamment pour commuter des ondes hyperfrequence sur une tres courte duree
US6830224B2 (en) 2001-02-26 2004-12-14 Railroad Transportation Communication Technologies (Rtct) Llc Rail communications system
US8702043B2 (en) 2010-09-28 2014-04-22 General Electric Company Rail vehicle control communication system and method for communicating with a rail vehicle
US9637147B2 (en) 2009-03-17 2017-05-02 General Electronic Company Data communication system and method
US8532850B2 (en) * 2009-03-17 2013-09-10 General Electric Company System and method for communicating data in locomotive consist or other vehicle consist
US9379775B2 (en) 2009-03-17 2016-06-28 General Electric Company Data communication system and method
US8798821B2 (en) 2009-03-17 2014-08-05 General Electric Company System and method for communicating data in a locomotive consist or other vehicle consist
US8825239B2 (en) 2010-05-19 2014-09-02 General Electric Company Communication system and method for a rail vehicle consist
US8935022B2 (en) 2009-03-17 2015-01-13 General Electric Company Data communication system and method
US8655517B2 (en) 2010-05-19 2014-02-18 General Electric Company Communication system and method for a rail vehicle consist
ATE479301T1 (de) * 2007-02-14 2010-09-15 Mitsubishi Electric Corp System und verfahren zum bereitstellen von kommunikation auf einem telekommunikationsgerät in einem transportmittel
US8583299B2 (en) * 2009-03-17 2013-11-12 General Electric Company System and method for communicating data in a train having one or more locomotive consists
US8651434B2 (en) 2010-10-26 2014-02-18 General Electric Company Methods and systems for rail communication
US10144440B2 (en) 2010-11-17 2018-12-04 General Electric Company Methods and systems for data communications
US9513630B2 (en) 2010-11-17 2016-12-06 General Electric Company Methods and systems for data communications
US8914170B2 (en) 2011-12-07 2014-12-16 General Electric Company System and method for communicating data in a vehicle system
US9153861B2 (en) * 2013-08-07 2015-10-06 GM Global Technology Operations LLC Using a vehicle structure as a medium for communication and power distribution
KR101646951B1 (ko) * 2014-08-26 2016-08-10 신우이.엔.지 주식회사 양방향 및 전이중 통신이 가능한 지상과 차상간의 통신장치, 그리고 그 제어방법
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Also Published As

Publication number Publication date
FR2607769B1 (fr) 1989-02-03
JPS63160432A (ja) 1988-07-04
EP0274650A1 (fr) 1988-07-20
DE3784155T2 (de) 1993-05-27
CA1272762A (fr) 1990-08-14
US4910793A (en) 1990-03-20
DE3784155D1 (de) 1993-03-25
ES2038649T3 (es) 1993-08-01
FR2607769A1 (fr) 1988-06-10
ATE85565T1 (de) 1993-02-15
JPH0817343B2 (ja) 1996-02-21

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