EP1374437A1 - High-speed data transmission system to a digital terminal - Google Patents

High-speed data transmission system to a digital terminal

Info

Publication number
EP1374437A1
EP1374437A1 EP02759808A EP02759808A EP1374437A1 EP 1374437 A1 EP1374437 A1 EP 1374437A1 EP 02759808 A EP02759808 A EP 02759808A EP 02759808 A EP02759808 A EP 02759808A EP 1374437 A1 EP1374437 A1 EP 1374437A1
Authority
EP
European Patent Office
Prior art keywords
electrical network
passive
information
xdsl
low voltage
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.)
Withdrawn
Application number
EP02759808A
Other languages
German (de)
French (fr)
Inventor
Jean-Marc Auzizeau
Gérard TEROL
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.)
Orange SA
Original Assignee
France Telecom SA
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 France Telecom SA filed Critical France Telecom SA
Publication of EP1374437A1 publication Critical patent/EP1374437A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5437—Wired telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5454—Adapter and plugs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits

Definitions

  • the present invention relates to a system for transmitting information at high speed to a digital terminal.
  • the invention finds an advantageous application in the field of high-speed information transmission on the terminal part of the subscriber line and via the subscriber's low-voltage electrical network.
  • Information systems are currently known for transmitting on a subscriber terminal link via the subscriber's low voltage electrical network, but these require the processing of the information to be transmitted.
  • This processing of information is carried out by the installation of two modem type devices.
  • One of the modem devices is located at the entrance to the subscriber's electrical network, near the reception of information.
  • Another modem device is arranged at the entrance to the terminal used by the subscriber to process the information transmitted.
  • These so-called modem devices carry out a so-called "PLT" ("Power Une Telecommunications" or telecommunications over an electrical line) modulation upon receipt of the information, then a PLT demodulation of the said information after passing over the subscriber's electrical network.
  • PLT Power Une Telecommunications
  • the technical problem to be solved by the object of the present invention is to propose a system for transmitting information at high throughput, which overcomes the drawbacks of existing systems by allowing the subscriber to connect to a low voltage electrical network and avoiding the installation of expensive devices on said subscriber's electrical network.
  • the solution to the technical problem posed consists, according to the present invention, in that said transmission system comprises at least passive means of adaptation between an xDSL link for transmitting high speed information and a low voltage electrical network, on which at least said digital subscriber terminal is connected.
  • the high speed information transmission system avoids the installation of said PLT modem devices, which have hitherto been necessary for the transmission of information over a low voltage electrical network.
  • PLT specific modulation and demodulation are no longer used for the transport of said information over the low voltage electricity network.
  • Said passive adaptation means replace the PLT modem devices used in existing transmission systems
  • xDSL The xDSL technology (acronym for Digital Subscriber one, generic abbreviation for digital subscriber lines) is a solution for transmitting high-speed information over a digital subscriber line.
  • xDSL designates all the technological families, such as for example the VDSL, HDSL, SDSL, ADSL, ADSL-lite techniques.
  • XDSL transmissions are based on the combination of powerful modulation, coding, multiplexing, error correction and filtering techniques.
  • This xDSL technology makes it possible to transmit various high-speed services over the subscriber line, for example services on sites connected to the Internet, telephone conversation services via the Internet (services known as "Voice over IP or VoIP"). "), interactive video on demand transmission services (so-called” VoD "services).
  • An xDSL connection consists of a modem device installed in the distribution network of telecommunications services. This first modem device performs, in the network, the modulation for the xDSL link. Another xDSL modem device is installed in the subscriber's installation. This second modem device performs demodulation to a digital subscriber terminal. It allows the subscriber to access the various broadband services.
  • said passive adaptation means are arranged, on the one hand, at the entrance to the low voltage electrical network and, on the other hand, at the entrance to said digital terminal.
  • said transmission system allows the use of a low voltage electrical network, generally existing inside all constructions, with numerous access points in the premises. This makes it possible to reach all of the potential users of telecommunications services. This also allows the subscriber to freely connect to any point of the low voltage electrical network, thanks to standard electrical outlets, avoiding special wiring for the transmission of said telecommunications services.
  • said high speed information transmission system according to the invention is capable of transporting xDSL modulation over the low voltage electrical network to the digital terminal, thanks to said passive adaptation means.
  • said high speed information transmission system is capable of directly transmitting said information, thanks to said passive adaptation means.
  • said passive means of adapting the system are each a passive assembly, without active component. This passive assembly, which does not process any information, also explains the compatibility with all xDSL technologies.
  • Said passive adaptation device associated with said transmission system comprises at least low frequency filtering means on the low voltage electrical network and an isolation means between the low voltage electrical network and the xDSL link.
  • said passive adaptation device according to the invention is of very simple design. It therefore represents only a low cost, unlike PLT modem devices. In this way, a large number of subscribers access broadband services, for example services on the Internet, hitherto reserved for subscribers with expensive devices PLT modem or special cabling for the transmission of said telecommunications services.
  • Figure 1 is an overall diagram of a transmission system according to the invention.
  • FIG. 2 shows the detailed diagram of a passive adaptation device.
  • a subscriber wishing to access services requiring the transmission of high speed information, is connected to a link 1 of xDSL type. As indicated above, this link transmits information modulated by the telecommunications service distributor.
  • a separator filter 22 which separates the voice signals and the information modulated in xDSL.
  • a passive adaptation device 10 is arranged on the modulated link 1 xDSL after the separator filter 22, upon receipt of the information to be transmitted.
  • said information transported over the electricity network is still modulated in xDSL.
  • the information to be transmitted is processed by so-called PLT modem devices, which modulate and demodulate said information so as to differentiate it from the electrical signal.
  • PLT modem devices which modulate and demodulate said information so as to differentiate it from the electrical signal.
  • This requires demodulation xDSL upon receipt of said information, so as to change modulation / demodulation using the specific PLT technology for transport on low voltage electrical network.
  • Said passive adaptation device 10 is either a small box added in the installation, or is incorporated in the separator filter 22. This latter solution is easily carried out taking into account the simplicity of said passive adaptation device 10, which is described detailed in Figure 2.
  • the connection of the passive adaptation device 10 with the subscriber's electrical network is made using a standard electrical outlet.
  • the passive adaptation device 10 is connected to the subscriber's electrical network on any standard electrical outlet.
  • the passive adaptation device 10 ′ is identical in all respects to the passive adaptation device 10 set up at the arrival of the xDSL modulated link 1.
  • Said passive adaptation device 10 ′ is arranged before the xDSL modem device 23.
  • This xDSL modem device 23 demodulates the information transmitted.
  • said passive adaptation device 10 ′ is either a small box added in the installation, or is incorporated in the device 23 xDSL modem. Said passive adaptation devices 10, 10 'being identical and very simple, once again, this latter solution is easily implemented.
  • the digital subscriber terminal is for example a PC type terminal or else a digital TV decoder or any other suitable digital terminal.
  • said passive adaptation device 10, 10 ′ which isolates from the electrical signal both the separator filter 22 and therefore the telephone line with the telephone set 21, as well as the xDSL modem device 23, while letting through the modulated information for high speed xDSL transmission.
  • the two passive adaptation devices 10, 10 ′ are identical at the input of the low-voltage electrical network 2 and towards the subscriber digital terminal 30.
  • the filtering means C1, C2 of said passive adaptation device 10, 10 ′ are two capacitors C1, C2 which eliminate the low frequencies from the electrical network. These two capacitors let pass the information to be transmitted, modulated in xDSL at higher frequencies.
  • the isolation means TR is a transformer allowing the impedance adaptation between the low voltage electrical network 2 and the modulated link 1 xDSL.
  • the limiting means DZ1, DZ2 are two Zener diodes eliminating all the noise peak signals above the threshold level of said Zener diodes. These noise peak signals, called transient signals, are conventionally encountered on an electrical network.
  • the adaptation means C3 is a capacitor allowing the impedance adaptation between the modulated link 1 xDSL and the telephone set 21. If no telephone set 21 is used to establish voice communications, the capacitor C3 is removed from said devices passive 10, 10 'adaptation.
  • said adaptation device 10, 10 ' is a passive assembly, without active component. The latter does not process the information to be transmitted.
  • said passive adaptation device 10, 10 ′ does not add any error in the xDSL transmission and it provides little attenuation on the level of information to be transmitted.
  • the simplicity of the assembly and the small number of components contained in said passive devices 10 and 10 ′ of adaptation allow them easily to be installed either in the separator filter 22 on reception of the information, or in the device 23 modem xDSL to subscriber digital terminal 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The invention concerns a high-speed data transmission system to a subscriber digital terminal (30). The invention is characterised in that said system comprises at least passive adapting means (10, 10') between an xDSL (1) high-speed data transmission link and a low voltage power network (2) whereon is connected at least said subscriber digital terminal (30). The invention is applicable to high-speed transmission on the terminal portion of the subscriber line.

Description

SYSTEME DE TRANSMISSION D'INFORMATIONS A HAUTS DEBITS VERSHIGH-THROUGHPUT INFORMATION TRANSMISSION SYSTEM
UN TERMINAL NUMERIQUEA DIGITAL TERMINAL
La présente invention concerne un système de transmission d'informations à hauts débits vers un terminal numérique.The present invention relates to a system for transmitting information at high speed to a digital terminal.
L'invention trouve une application avantageuse dans le domaine de la transmission d'informations à hauts débits sur la partie terminale de la ligne d'abonné et par l'intermédiaire du réseau électrique basse tension de l'abonné.The invention finds an advantageous application in the field of high-speed information transmission on the terminal part of the subscriber line and via the subscriber's low-voltage electrical network.
On connaît actuellement des systèmes de transmission d'informations sur une liaison terminale d'abonné par l'intermédiaire du réseau électrique basse tension de l'abonné, mais ceux-ci nécessitent le traitement des informations à transmettre. Ce traitement des informations est réalisé par la mise en place de deux dispositifs de type modem. Un des dispositifs modem est disposé à l'entrée du réseau électrique de l'abonné, près de la réception des informations. Un autre dispositif modem est disposé à l'entrée du terminal utilisé par l'abonné pour exploiter les informations transmises. Ces dits dispositifs modem réalisent une modulation adaptée dite "PLT" ("Power Une Télécommunications" ou télécommunications sur ligne électrique) à la réception des informations, puis une démodulation PLT desdites informations après le passage sur le réseau électrique de l'abonné. Cette modulation adaptée PLT permet la transmission d'informations dans une bande de fréquences différente de celle du réseau électrique basse tension.Information systems are currently known for transmitting on a subscriber terminal link via the subscriber's low voltage electrical network, but these require the processing of the information to be transmitted. This processing of information is carried out by the installation of two modem type devices. One of the modem devices is located at the entrance to the subscriber's electrical network, near the reception of information. Another modem device is arranged at the entrance to the terminal used by the subscriber to process the information transmitted. These so-called modem devices carry out a so-called "PLT" ("Power Une Telecommunications" or telecommunications over an electrical line) modulation upon receipt of the information, then a PLT demodulation of the said information after passing over the subscriber's electrical network. This adapted PLT modulation allows the transmission of information in a frequency band different from that of the low voltage electrical network.
Les systèmes existants ne fonctionnent qu'en ajoutant lesdits dispositifs modem PLT sur le réseau électrique, ce qui représente un matériel supplémentaire spécifique à ce type de transmission sur réseau électrique basse tension. La mise en place desdits dispositifs modem PLT induit un coût supplémentaire. Le coût des deux dispositifs modem, qui modulent et démodulent les informations, est important pour l'abonné, ce qui limite l'utilisation desdits systèmes de transmission sur le réseau électrique basse tension. Aussi, le problème technique à résoudre par l'objet de la présente invention est de proposer un système de transmission d'informations à hauts débits, qui remédie aux inconvénients des systèmes existants en permettant à l'abonné de se raccorder sur un réseau électrique basse tension et en évitant la mise en place de dispositifs coûteux sur ledit réseau électrique de l'abonné.Existing systems only work by adding said PLT modem devices to the electrical network, which represents additional equipment specific to this type of transmission over low voltage electrical network. The installation of said PLT modem devices induces an additional cost. The cost of the two modem devices, which modulate and demodulate the information, is significant for the subscriber, which limits the use of said transmission systems on the low voltage electrical network. Also, the technical problem to be solved by the object of the present invention is to propose a system for transmitting information at high throughput, which overcomes the drawbacks of existing systems by allowing the subscriber to connect to a low voltage electrical network and avoiding the installation of expensive devices on said subscriber's electrical network.
La solution au problème technique posé consiste, selon la présente invention, en ce que ledit système de transmission comprend au moins des moyens passifs d'adaptation entre une liaison xDSL de transmission d'informations à hauts débits et un réseau électrique basse tension, sur lequel est raccordé au moins ledit terminal numérique d'abonné.The solution to the technical problem posed consists, according to the present invention, in that said transmission system comprises at least passive means of adaptation between an xDSL link for transmitting high speed information and a low voltage electrical network, on which at least said digital subscriber terminal is connected.
Ainsi, le système de transmission d'informations à hauts débits conforme à l'invention évite la mise en place desdits dispositifs modem PLT, nécessaires jusqu'à présent à la transmission d'informations sur un réseau électrique basse tension. Les modulation et démodulation spécifiques PLT ne sont plus utilisées pour le transport desdites informations sur le réseau électrique basse tension. Lesdits moyens passifs d'adaptation remplacent les dispositifs modem PLT utilisés dans les systèmes de transmission existantsThus, the high speed information transmission system according to the invention avoids the installation of said PLT modem devices, which have hitherto been necessary for the transmission of information over a low voltage electrical network. PLT specific modulation and demodulation are no longer used for the transport of said information over the low voltage electricity network. Said passive adaptation means replace the PLT modem devices used in existing transmission systems
La technologie xDSL (de l'acronyme Digital Subscriber une, abréviation générique pour les lignes numériques d'abonné) est une solution de transmission d'informations à hauts débits sur une ligne numérique d'abonné. On désigne en général par xDSL toutes les familles technologiques, comme par exemple les techniques VDSL, HDSL, SDSL, ADSL, ADSL-lite.The xDSL technology (acronym for Digital Subscriber one, generic abbreviation for digital subscriber lines) is a solution for transmitting high-speed information over a digital subscriber line. In general, xDSL designates all the technological families, such as for example the VDSL, HDSL, SDSL, ADSL, ADSL-lite techniques.
Les transmissions xDSL reposent sur l'association de techniques performantes de modulation, de codage, de multiplexage, de correction d'erreur et de filtrage. Cette technologie xDSL permet de transmettre sur la ligne d'abonné différents services à hauts débits, par exemple des services sur les sites raccordés à Internet, des services de conversation téléphonique par l'intermédiaire du réseau Internet (services dits "Voix sur IP ou VoIP"), des services interactifs de transmission de vidéo à la demande (services dits "VoD"). Un raccordement xDSL est composé d'un dispositif modem installé dans le réseau de distribution des services de télécommunications. Ce premier dispositif modem réalise, dans le réseau, la modulation pour la liaison xDSL. Un autre dispositif modem xDSL est mis en place dans l'installation de l'abonné. Ce second dispositif modem réalise la démodulation vers un terminal numérique d'abonné. Il permet à l'abonné d'accéder aux différents services à hauts débits.XDSL transmissions are based on the combination of powerful modulation, coding, multiplexing, error correction and filtering techniques. This xDSL technology makes it possible to transmit various high-speed services over the subscriber line, for example services on sites connected to the Internet, telephone conversation services via the Internet (services known as "Voice over IP or VoIP"). "), interactive video on demand transmission services (so-called" VoD "services). An xDSL connection consists of a modem device installed in the distribution network of telecommunications services. This first modem device performs, in the network, the modulation for the xDSL link. Another xDSL modem device is installed in the subscriber's installation. This second modem device performs demodulation to a digital subscriber terminal. It allows the subscriber to access the various broadband services.
Selon l'invention, lesdits moyens passifs d'adaptation sont disposés, d'une part, à l'entrée du réseau électrique basse tension et, d'autre part, à l'entrée dudit terminal numérique.According to the invention, said passive adaptation means are arranged, on the one hand, at the entrance to the low voltage electrical network and, on the other hand, at the entrance to said digital terminal.
De cette façon, ledit système de transmission permet l'utilisation d'un réseau électrique basse tension, existant généralement à l'intérieur de toutes les constructions, avec de nombreux points d'accès dans les locaux. Ceci permet d'atteindre l'ensemble des utilisateurs potentiels de services de télécommunications. Ceci permet également à l'abonné de se raccorder librement en tout point du réseau électrique basse tension, grâce aux prises électriques standard, évitant un câblage particulier pour la transmission desdits services de télécommunications.In this way, said transmission system allows the use of a low voltage electrical network, generally existing inside all constructions, with numerous access points in the premises. This makes it possible to reach all of the potential users of telecommunications services. This also allows the subscriber to freely connect to any point of the low voltage electrical network, thanks to standard electrical outlets, avoiding special wiring for the transmission of said telecommunications services.
De plus, ledit système de transmission d'informations à hauts débits conforme à l'invention est apte à transporter une modulation xDSL sur le réseau électrique basse tension jusqu'au terminal numérique, grâce aux dits moyens passifs d'adaptation.In addition, said high speed information transmission system according to the invention is capable of transporting xDSL modulation over the low voltage electrical network to the digital terminal, thanks to said passive adaptation means.
De ce fait, celui-ci est très simple à mettre en œuvre dans un système de transmission à hauts débits utilisant une liaison xDSL. On notera que ledit système de transmission d'informations à hauts débits conforme à l'invention est apte à transmettre directement lesdites informations, grâce aux dits moyens passifs d'adaptation. En effet, lesdits moyens passifs d'adaptation du système sont chacun un montage passif, sans composant actif. Ce montage passif, qui ne réalise aucun traitement des informations, explique également la compatibilité avec toutes les technologies xDSL.Therefore, it is very simple to implement in a high speed transmission system using an xDSL link. It will be noted that said high speed information transmission system according to the invention is capable of directly transmitting said information, thanks to said passive adaptation means. Indeed, said passive means of adapting the system are each a passive assembly, without active component. This passive assembly, which does not process any information, also explains the compatibility with all xDSL technologies.
Ledit dispositif passif d'adaptation associé au dit système de transmission conforme à l'invention comprend au moins des moyens de filtrage basse fréquence sur le réseau électrique basse tension et un moyen d'isolation entre le réseau électrique basse tension et la liaison xDSL.Said passive adaptation device associated with said transmission system according to the invention comprises at least low frequency filtering means on the low voltage electrical network and an isolation means between the low voltage electrical network and the xDSL link.
De fait, ledit dispositif passif d'adaptation selon l'invention est de conception très simple. Il ne représente donc qu'un faible coût, contrairement aux dispositifs modem PLT. De cette façon, une grande quantité d'abonnés accède à des services à hauts débits, par exemple des services sur Internet, réservés jusqu'à présent aux abonnés possédant les coûteux dispositifs modem PLT ou bien un câblage particulier pour la transmission desdits services de télécommunications.In fact, said passive adaptation device according to the invention is of very simple design. It therefore represents only a low cost, unlike PLT modem devices. In this way, a large number of subscribers access broadband services, for example services on the Internet, hitherto reserved for subscribers with expensive devices PLT modem or special cabling for the transmission of said telecommunications services.
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The description which follows with reference to the appended drawings, given by way of nonlimiting examples, will make it clear what the invention consists of and how it can be implemented.
La figure 1 est un schéma d'ensemble d'un système de transmission conforme à l'invention.Figure 1 is an overall diagram of a transmission system according to the invention.
La figure 2 représente le schéma détaillé de réalisation d'un dispositif passif d'adaptation. Un abonné, désirant accéder à des services nécessitant la transmission d'informations à hauts débits, est raccordé à une liaison 1 de type xDSL. Comme indiqué plus haut, cette liaison transmet des informations modulées par le distributeur de services de télécommunications. Le système de transmission à hauts débits vers un terminal numérique 30 d'abonné, conforme à l'invention, est présenté en figure 1 dans son ensemble.Figure 2 shows the detailed diagram of a passive adaptation device. A subscriber, wishing to access services requiring the transmission of high speed information, is connected to a link 1 of xDSL type. As indicated above, this link transmits information modulated by the telecommunications service distributor. The high-speed transmission system to a digital subscriber terminal 30, in accordance with the invention, is presented in FIG. 1 as a whole.
Si l'abonné continue à utiliser un poste téléphonique 21 pour établir des communications vocales, celui-ci est raccordé à un filtre séparateur 22 qui sépare les signaux vocaux et les informations modulées en xDSL.If the subscriber continues to use a telephone set 21 to establish voice communications, this is connected to a separator filter 22 which separates the voice signals and the information modulated in xDSL.
Pour permettre le transport des informations à transmettre par le réseau électrique basse tension 2 de l'abonné, un dispositif passif 10 d'adaptation est disposé sur la liaison 1 modulée xDSL après le filtre séparateur 22, à la réception des informations à transmettre.To allow the transport of information to be transmitted by the subscriber's low-voltage electrical network 2, a passive adaptation device 10 is arranged on the modulated link 1 xDSL after the separator filter 22, upon receipt of the information to be transmitted.
Contrairement aux systèmes existants, lesdites informations transportées sur le réseau électrique sont encore modulées en xDSL. Dans les systèmes existants, les informations à transmettre sont traitées par les dispositifs modem dits PLT, qui modulent et démodulent lesdites informations de manière à les différencier du signal électrique. Ceci impose la démodulation xDSL dès la réception desdites informations, de façon à changer de modulation/démodulation en utilisant la technologie PLT spécifique pour le transport sur réseau électrique basse tension.Unlike existing systems, said information transported over the electricity network is still modulated in xDSL. In existing systems, the information to be transmitted is processed by so-called PLT modem devices, which modulate and demodulate said information so as to differentiate it from the electrical signal. This requires demodulation xDSL upon receipt of said information, so as to change modulation / demodulation using the specific PLT technology for transport on low voltage electrical network.
Ledit dispositif passif 10 d'adaptation est soit un petit boîtier ajouté dans l'installation, soit est incorporé dans le filtre séparateur 22. Cette dernière solution est aisément réalisée compte tenu de la simplicité dudit dispositif passif 10 d'adaptation, qui est décrit de façon détaillée à la figure 2. Le raccordement du dispositif passif 10 d'adaptation avec le réseau électrique de l'abonné se fait grâce à une prise électrique standard.Said passive adaptation device 10 is either a small box added in the installation, or is incorporated in the separator filter 22. This latter solution is easily carried out taking into account the simplicity of said passive adaptation device 10, which is described detailed in Figure 2. The connection of the passive adaptation device 10 with the subscriber's electrical network is made using a standard electrical outlet.
De la même manière, vers le terminal numérique 30 d'abonné, le dispositif passif 10' d'adaptation se raccorde au réseau électrique de l'abonné sur n'importe quelle prise électrique standard.In the same way, towards the digital subscriber terminal 30, the passive adaptation device 10 'is connected to the subscriber's electrical network on any standard electrical outlet.
De plus, pour simplifier encore l'installation, le dispositif passif 10' d'adaptation est en tout point identique au dispositif passif 10 d'adaptation mis en place à l'arrivée de la liaison 1 modulée xDSL.In addition, to further simplify the installation, the passive adaptation device 10 ′ is identical in all respects to the passive adaptation device 10 set up at the arrival of the xDSL modulated link 1.
Ledit dispositif passif 10' d'adaptation est disposé avant le dispositif 23 modem xDSL. Ce dispositif 23 modem xDSL démodule les informations transmises.Said passive adaptation device 10 ′ is arranged before the xDSL modem device 23. This xDSL modem device 23 demodulates the information transmitted.
De la même façon que pour le filtre séparateur, ledit dispositif passif 10' d'adaptation est soit un petit boîtier ajouté dans l'installation, soit est incorporé dans le dispositif 23 modem xDSL. Lesdits dispositifs passifs 10, 10' d'adaptation étant identiques et très simples, une nouvelle fois, cette dernière solution est aisément réalisée.In the same way as for the separating filter, said passive adaptation device 10 ′ is either a small box added in the installation, or is incorporated in the device 23 xDSL modem. Said passive adaptation devices 10, 10 'being identical and very simple, once again, this latter solution is easily implemented.
Lesdites informations sont ensuite transmises vers un terminal numérique 30 d'abonné. Selon le type d'informations concernées, le terminal numérique d'abonné est par exemple un terminal de type PC ou bien un décodeur numérique TV ou tout autre terminal numérique adéquat.Said information is then transmitted to a digital subscriber terminal 30. Depending on the type of information concerned, the digital subscriber terminal is for example a PC type terminal or else a digital TV decoder or any other suitable digital terminal.
Nous allons à présent faire une description détaillée dudit dispositif passif 10, 10' d'adaptation, qui isole du signal électrique à la fois le filtre séparateur 22 et donc la ligne téléphonique avec le poste téléphonique 21 , ainsi que le dispositif 23 modem xDSL, tout en laissant passer les informations modulées pour la transmission xDSL à hauts débits.We will now make a detailed description of said passive adaptation device 10, 10 ′, which isolates from the electrical signal both the separator filter 22 and therefore the telephone line with the telephone set 21, as well as the xDSL modem device 23, while letting through the modulated information for high speed xDSL transmission.
Pour mémoire, rappelons que les deux dispositifs passifs 10, 10' d'adaptation sont identiques à l'entrée du réseau électrique basse tension 2 et vers le terminal numérique 30 d'abonné.As a reminder, it should be recalled that the two passive adaptation devices 10, 10 ′ are identical at the input of the low-voltage electrical network 2 and towards the subscriber digital terminal 30.
Se rapportant à la figure 2, les moyens de filtrage C1 , C2 dudit dispositif passif 10, 10' d'adaptation sont deux condensateurs C1, C2 qui éliminent les basses fréquences du réseau électrique. Ces deux condensateurs laissent passer les informations à transmettre, modulées en xDSL à des fréquences plus hautes. Le moyen d'isolation TR est un transformateur permettant l'adaptation d'impédance entre le réseau électrique basse tension 2 et la liaison 1 modulée xDSL.Referring to FIG. 2, the filtering means C1, C2 of said passive adaptation device 10, 10 ′ are two capacitors C1, C2 which eliminate the low frequencies from the electrical network. These two capacitors let pass the information to be transmitted, modulated in xDSL at higher frequencies. The isolation means TR is a transformer allowing the impedance adaptation between the low voltage electrical network 2 and the modulated link 1 xDSL.
Il permet également l'isolation galvanique, évitant le passage du signal électrique du côté de l'abonné en cas de défaillance des condensateurs de filtrage C1, 02. Cette isolation galvanique est une sécurité pour l'abonné et une obligation pour tout équipement raccordé au réseau électrique et utilisé par le grand public.It also allows galvanic isolation, avoiding the passage of the electrical signal on the subscriber's side in the event of failure of the filter capacitors C1, 02. This galvanic isolation is a safety for the subscriber and an obligation for any equipment connected to the electrical network and used by the general public.
Les moyens de limitation DZ1 , DZ2 sont deux diodes Zener éliminant tous les signaux de pic de bruit au-dessus du niveau de seuil desdites diodes Zener. Ces signaux de pic de bruit, appelés signaux transitoires, sont classiquement rencontrés sur un réseau électrique.The limiting means DZ1, DZ2 are two Zener diodes eliminating all the noise peak signals above the threshold level of said Zener diodes. These noise peak signals, called transient signals, are conventionally encountered on an electrical network.
Le moyen d'adaptation C3 est un condensateur permettant l'adaptation d'impédance entre la liaison 1 modulée xDSL et le poste téléphonique 21. Si aucun poste téléphonique 21 n'est utilisé pour établir des communications vocales, le condensateur C3 est supprimé desdits dispositifs passifs 10, 10' d'adaptation.The adaptation means C3 is a capacitor allowing the impedance adaptation between the modulated link 1 xDSL and the telephone set 21. If no telephone set 21 is used to establish voice communications, the capacitor C3 is removed from said devices passive 10, 10 'adaptation.
Comme mentionné dans la description, après examen détaillé, nous constatons que ledit dispositif d'adaptation 10, 10' est un montage passif, sans composant actif. Celui-ci ne réalise aucun traitement sur les informations à transmettre.As mentioned in the description, after detailed examination, we note that said adaptation device 10, 10 'is a passive assembly, without active component. The latter does not process the information to be transmitted.
De ce fait, ledit dispositif passif 10, 10' d'adaptation n'ajoute pas d'erreur dans la transmission xDSL et il apporte peu d'atténuation sur le niveau des informations à transmettre. Comme indiqué ci-dessus, la simplicité du montage et le faible nombre de composants contenus dans lesdits dispositifs passifs 10 et 10' d'adaptation permettent aisément leur implantation soit dans le filtre séparateur 22 à la réception des informations, soit dans le dispositif 23 modem xDSL vers le terminal numérique 30 d'abonné. Therefore, said passive adaptation device 10, 10 ′ does not add any error in the xDSL transmission and it provides little attenuation on the level of information to be transmitted. As indicated above, the simplicity of the assembly and the small number of components contained in said passive devices 10 and 10 ′ of adaptation allow them easily to be installed either in the separator filter 22 on reception of the information, or in the device 23 modem xDSL to subscriber digital terminal 30.

Claims

REVENDICATIONS
1. Système de transmission d'informations à hauts débits vers un terminal numérique (30) d'abonné, caractérisé en ce que ledit système comprend au moins des moyens passifs (10, 10') d'adaptation entre une liaison xDSL (1 ) de transmission d'informations à hauts débits et un réseau électrique basse tension (2) sur lequel est raccordé au moins ledit terminal numérique (30) d'abonné.1. A system for transmitting high speed information to a digital subscriber terminal (30), characterized in that said system comprises at least passive means (10, 10 ′) for adapting between an xDSL link (1) for transmitting high speed information and a low voltage electrical network (2) to which at least said digital subscriber terminal (30) is connected.
2. Système de transmission selon la revendication 1 , caractérisé en ce que lesdits moyens passifs (10, 10') d'adaptation sont disposés, d'une part, à l'entrée du réseau électrique basse tension (2) et, d'autre part, à l'entrée dudit terminal numérique (30).2. Transmission system according to claim 1, characterized in that said passive means (10, 10 ') of adaptation are arranged, on the one hand, at the input of the low voltage electrical network (2) and, on the other hand, at the entrance to said digital terminal (30).
3. Système de transmission selon l'une des revendications 1 ou 2, caractérisé en ce que ledit système est apte à transporter une modulation xDSL sur le réseau électrique basse tension (2) jusqu'au terminal numérique (30), grâce aux dits moyens passifs (10, 10') d'adaptation.3. Transmission system according to one of claims 1 or 2, characterized in that said system is capable of transporting an xDSL modulation on the low voltage electrical network (2) to the digital terminal (30), thanks to said means passive (10, 10 ') adaptation.
4. Système de transmission à hauts débits selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit système est apte à transmettre directement lesdites informations, grâce aux dits moyens passifs (10, 10') d'adaptation.4. High speed transmission system according to any one of claims 1 to 3, characterized in that said system is capable of directly transmitting said information, thanks to said passive means (10, 10 ') of adaptation.
5. Dispositif passif (10, 10') d'adaptation associé au système de transmission selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comprend au moins : - des moyens de filtrage (C1 , C2) basse fréquence sur le réseau électrique basse tension (2) ; un moyen d'isolation (TR) entre le réseau électrique basse tension (2) et la liaison xDSL (1 ).5. passive device (10, 10 ') for adaptation associated with the transmission system according to any one of claims 1 to 4, characterized in that it comprises at least: - low filtering means (C1, C2) frequency on the low voltage electrical network (2); an isolation means (TR) between the low voltage electrical network (2) and the xDSL link (1).
6. Dispositif passif (10, 10') d'adaptation selon la revendication 5, caractérisé en ce que ledit dispositif (10, 10') comprend un moyen d'adaptation (C3) pour adapter l'impédance vers un poste téléphonique (21 ). 6. Passive device (10, 10 ') for adaptation according to claim 5, characterized in that said device (10, 10') comprises an adaptation means (C3) for adapting the impedance to a telephone set (21 ).
EP02759808A 2001-04-05 2002-04-02 High-speed data transmission system to a digital terminal Withdrawn EP1374437A1 (en)

Applications Claiming Priority (3)

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FR0104762 2001-04-05
FR0104762A FR2823406B1 (en) 2001-04-05 2001-04-05 SYSTEM FOR TRANSMITTING HIGH-FLOW INFORMATION TO A DIGITAL TERMINAL
PCT/FR2002/001128 WO2002082682A1 (en) 2001-04-05 2002-04-02 High-speed data transmission system to a digital terminal

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EP (1) EP1374437A1 (en)
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FR2823406B1 (en) 2005-05-13
CN1502178A (en) 2004-06-02
JP2004533747A (en) 2004-11-04
FR2823406A1 (en) 2002-10-11
US20040105539A1 (en) 2004-06-03
WO2002082682A1 (en) 2002-10-17

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