WO2002084906A1 - High-speed optical transmission device - Google Patents

High-speed optical transmission device Download PDF

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Publication number
WO2002084906A1
WO2002084906A1 PCT/FR2002/001211 FR0201211W WO02084906A1 WO 2002084906 A1 WO2002084906 A1 WO 2002084906A1 FR 0201211 W FR0201211 W FR 0201211W WO 02084906 A1 WO02084906 A1 WO 02084906A1
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WO
WIPO (PCT)
Prior art keywords
optical
signals
optical transmission
transmission device
coupler
Prior art date
Application number
PCT/FR2002/001211
Other languages
French (fr)
Inventor
André Hamel
Hubert Poignant
Hélène BARBOULE
Daniel Laville
Original Assignee
France Telecom
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 filed Critical France Telecom
Publication of WO2002084906A1 publication Critical patent/WO2002084906A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0298—Wavelength-division multiplex systems with sub-carrier multiplexing [SCM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures

Definitions

  • the invention relates to fiber optic networks for high speed data transmission.
  • optical networks allowing the connection of several users from the same geographic area.
  • These optical networks include a main optical transmission line for transmitting a time-division multiplex signal. This line is connected to a coupler which shares the optical power of the signal and its bandwidth to return this time-division multiplex signal on different individual optical lines.
  • Each individual optical line is assigned to a user.
  • Each user has an electronic receiver making it possible to extract by time demultiplexing the information which is intended for him.
  • the advantage of such a network is that it makes it possible to share a single transmission medium constituted by the main optical transmission line between the different users thanks to the principle of spectral multiplexing. This network therefore allows high speeds (1.25 Gbit / s and up to 2.5 Gbit / s) to be obtained.
  • An object of the invention is to overcome these drawbacks by proposing an optical network having a high speed, capable of connecting several users located in a given area and not requiring electrical connection.
  • Another object of the invention is to propose an optical network allowing individualized management of each user receiver.
  • the invention provides an optical transmission device comprising at least one main node receiving the signals from one or more wired communication network (s) and converting them into optical signals, as well as at least one line.
  • transmission line transmitting optical signals multiplex in wavelength, and extending between the main node and a coupler
  • the device comprising individual optical transmission lines, each extending between the coupler and a transmission terminal / reception at a user, the coupler being an optical module which separates the different wavelengths to distribute them on the different individual transmission lines, characterized in that the coupler is of the type with interference optical filter (s) ( s).
  • Interference optical filters have the advantage of being particularly stable in temperature. Typically, they can have a coefficient of thermal drift on the order of 1 to a few picometers per degree. Such filters therefore have the advantage of being passive components and of not requiring a supply of electrical energy.
  • the coupler advantageously constitutes an entirely passive module and dissociated from the transmission / reception terminals at the user's.
  • the distribution box comprising the coupler can advantageously be installed without any constraint of energy supply or distance from users.
  • the coupler assigns a spectral window dedicated to a user to each individual transmission line.
  • the optical lines therefore do not transport the entire main signal but only the part extracted by the demultiplexer and containing the information relating to a user. This is why these individual transmission lines allow a higher speed than in the prior art.
  • Each user terminal is configured according to the contract that it has signed with the network operator.
  • This configuration includes in particular the flow assigned to it.
  • the network makes it possible to exchange, in addition to the information intended for a user of the network, configuration management information.
  • signals supporting management information are associated with "useful" signals containing the information to be transmitted.
  • These management signals can contain information originating from a user and indicating his configuration. Such information concerning all users is sent to a management center accessible to the network operator.
  • the operator can receive management signals from users, but it can also transmit management signals containing instructions for modifying the configuration of a user. These control signals are transmitted via the optical network to multi-speed reception and transmission modules installed in the user terminals.
  • FIG. 1 is a diagram representing an example of a network structure in accordance with the invention
  • FIG. 2 is a frequency spectrum of a signal carried by one of the individual transmission lines.
  • the optical network comprises a main node 1 connected by a main transmission line 2 to an optical WDM splitter module 3.
  • the splitter module 3 is connected to the various transmission / reception terminals 5 by individual transmission lines broadband 4 (between 100 Mbit / s and 2.5 Gbit / s).
  • Each terminal is located with a user.
  • the lines are made up at least one pair of fibers ensuring the transmission of outward and return signals and making it possible to further increase the network speed.
  • the main node 1 provides the link between conventional wired information transmission networks and the optical network.
  • This main node includes transmit / receive transponders 6 connected to different wired communication networks such as Fast Ethernet (100 MHz), ATM 155, Giga Ethernet (1GHz) or Escon. These transponders 6 convert the electrical signals into “useful” optical signals.
  • the "useful" optical signals are transmitted to an optical multiplexer / demultiplexer 7.
  • the different optical signals are frequency-multiplexed and transmitted via the main transmission line 2 to the WDM splitter module 3 which distributes the different frequencies transported on the different individual transmission lines 4.
  • the different frequencies are distributed over the individual transmission lines 4 by filtering the signals transmitted by the main transmission line by means of interference optical filters. These filters have very little thermal drift, typically of the order of 1 picometer per degree.
  • Interference filters are made up of thin layers of dielectric or metallic materials with different refractive indices. They make it possible to select wavelengths thanks to interference effects which occur on the surface of the layers between the incident waves and the reflected waves. They also have an almost zero absorption coefficient for the transmitted wavelengths.
  • the WDM 3 module can include filters such as those sold by the companies JDS, Corning or E-Tek.
  • the company JDS offers interference filters under the names "WD1508 M1", “WD1508 M2", “WD1508 D1” and “WD1508 D2” capable of multiplexing or demultiplexing 8 WDM channels spaced from 100 or 200 GHz. These filters operate at temperatures between 0 and 50 ° C while retaining their characteristics of narrow filters.
  • a management module 8 is connected to the optical multiplexer / demultiplexer 7. This management module 8 transmits to the multiplexer / demultiplexer 7 low bit rate signals (from 1 to 64 kbit) supporting configuration management information.
  • the multiplexer / demultiplexer 7 transmits on the one hand the "useful" signals intended for the users and on the other hand configuration management information by overmodulation of the optical carrier specific to each user.
  • FIG. 2 is an example of a signal spectrum transported by one of the individual transmission lines 4. It shows a useful signal 9 in a frequency range dedicated to a user and a low bit rate signal 10 having a lower frequency containing management information.
  • the over-modulated configuration management signals 10 control for example the clock frequency of a user terminal 5. These management signals 10 therefore make it possible to modify the value of the bit rate allocated to one of the users.
  • the multiplexer / demultiplexer 7 also receives in return "useful" information 9 coming from the user terminals 5 and configuration management information 10 concerning these terminals 5.
  • the multiplexer / demultiplexer 7 transmits the "useful" signals 9 to the transponders 6 which convert them into electrical signals to send them over the different wired communication networks. It extracts in parallel the signals 10 containing user configuration information and transmits them to the management module 8.
  • the management module 8 is connected to a communication network by which it transmits this information to an operator management center network.
  • the network operator has access to the management center and can thus know the configuration and performance data of the equipment for the different users. It can also send configuration change instructions.
  • This management center can for example be located at the operator's remote from the optical network and can manage information coming from several nodes of the same type as node 1 included in other optical networks.

Abstract

The invention relates to an optical transmission device comprising at least one main node (1) receiving signals from one or several wire communication networks and converting them into optical signals, in addition to at least one optical transmission line (2) transmitting wavelength multiplexed optical signals and extending between the main node (1) and a coupler (3). Said device comprises individual optical transmission lines (4) each of which extends between the coupler (3) and a transmitting/receiving user terminal (5), the coupler (3) being an optical module separating different wavelengths in order to distribute them on different individual transmission lines (4). The invention is characterized in that the coupler (3) is an interferential optical filter type coupler.

Description

DISPOSITIF DE TRANSMISSION OPTIQUE HAUT DEBIT HIGH SPEED OPTICAL TRANSMISSION DEVICE
L'invention concerne les réseaux de fibres optiques permettant la transmission de données à haut débit.The invention relates to fiber optic networks for high speed data transmission.
Il existe actuellement des réseaux optiques de type PON permettant le raccordement de plusieurs usagers d'une même zone géographique. Ces réseaux optiques comprennent une ligne de transmission optique principale permettant de transmettre un signal multiplexe temporellement. Cette ligne est connectée à un coupleur qui partage la puissance optique du signal et sa bande passante pour renvoyer ce signal multiplexe temporellement sur différentes lignes optiques individuelles. Chaque ligne optique individuelle est affectée à un usager. Chaque usager possède un récepteur électronique permettant d'extraire par démultiplexage temporel l'information qui lui est destinée.There are currently PON type optical networks allowing the connection of several users from the same geographic area. These optical networks include a main optical transmission line for transmitting a time-division multiplex signal. This line is connected to a coupler which shares the optical power of the signal and its bandwidth to return this time-division multiplex signal on different individual optical lines. Each individual optical line is assigned to a user. Each user has an electronic receiver making it possible to extract by time demultiplexing the information which is intended for him.
Avec de tels réseaux, le débit utile par usager est limité (20 Mbit/s environ) et le coût total des équipements reste élevé.With such networks, the useful speed per user is limited (around 20 Mbit / s) and the total cost of the equipment remains high.
Un autre type de réseau a été décrit lors de la conférence "Workshop on optical Access Networks" (Atlanta, mars 1997) sur les réseaux d'accès, sous le nom de WDM PON. Dans ce type de réseau, le signal est réparti sur les différentes lignes optiques affectées à chaque usager de manière spectrale et non plus temporelle.Another type of network was described at the conference "Workshop on optical Access Networks" (Atlanta, March 1997) on access networks, under the name of WDM PON. In this type of network, the signal is distributed over the different optical lines assigned to each user spectrally rather than temporally.
L'avantage d'un tel réseau est qu'il permet de partager un support de transmission unique constitué par la ligne de transmission optique principale entre les différents usagers grâce au principe de multiplexage spectral. Ce réseau permet de ce fait d'obtenir des hauts débits (1 ,25 Gbit/s et jusqu'à 2,5 Gbit/s).The advantage of such a network is that it makes it possible to share a single transmission medium constituted by the main optical transmission line between the different users thanks to the principle of spectral multiplexing. This network therefore allows high speeds (1.25 Gbit / s and up to 2.5 Gbit / s) to be obtained.
Cependant, ce type de réseau nécessite l'utilisation d'un système de stabilisation thermique au niveau des modules de multiplexage/démultiplexage, donc il ne peut être utilisé sans raccordement électrique.However, this type of network requires the use of a thermal stabilization system at the level of the multiplexing / demultiplexing modules, so it cannot be used without an electrical connection.
En outre, il ne permet pas de contrôler ou de modifier facilement la configuration de chaque usager. Un but de l'invention est de pallier ces inconvénients en proposant un réseau optique présentant un haut débit, apte à relier plusieurs utilisateurs implantés sur une zone donnée et ne nécessitant pas de raccordement électrique.In addition, it does not allow to easily control or modify the configuration of each user. An object of the invention is to overcome these drawbacks by proposing an optical network having a high speed, capable of connecting several users located in a given area and not requiring electrical connection.
Un autre but de l'invention est de proposer un réseau optique permettant une gestion individualisée de chaque récepteur d'usager.Another object of the invention is to propose an optical network allowing individualized management of each user receiver.
A cet effet, l'invention propose un dispositif de transmission optique comprenant au moins un nœud principal recevant les signaux en provenance d'un ou plusieurs réseau(x) de communication filaires et les convertissant en signaux optiques, ainsi qu'au moins une ligne de transmission optique transmettant des signaux optiques multiplexes en longueur d'onde, et s'étendant entre le nœud principal et un coupleur, le dispositif comportant des lignes de transmission optiques individuelles, chacune s'étendant entre le coupleur et un terminal d'émission/réception chez un usager, le coupleur étant un module optique qui sépare les différentes longueurs d'onde pour les répartir sur les différentes lignes de transmission individuelles, caractérisé en ce que le coupleur est du type à filtre(s) optique(s) interférentiel(s).To this end, the invention provides an optical transmission device comprising at least one main node receiving the signals from one or more wired communication network (s) and converting them into optical signals, as well as at least one line. transmission line transmitting optical signals multiplex in wavelength, and extending between the main node and a coupler, the device comprising individual optical transmission lines, each extending between the coupler and a transmission terminal / reception at a user, the coupler being an optical module which separates the different wavelengths to distribute them on the different individual transmission lines, characterized in that the coupler is of the type with interference optical filter (s) ( s).
Les filtres optiques interférentiels ont en effet l'avantage d'être particulièrement stables en température. Typiquement, ils peuvent présenter un coefficient de dérive thermique de l'ordre de 1 à quelques picomètres par degré. De tels filtres ont donc l'avantage d'être des composants passifs et de ne pas nécessiter une alimentation en énergie électrique.Interference optical filters have the advantage of being particularly stable in temperature. Typically, they can have a coefficient of thermal drift on the order of 1 to a few picometers per degree. Such filters therefore have the advantage of being passive components and of not requiring a supply of electrical energy.
Dans un tel dispositif de transmission optique, le coupleur constitue avantageusement un module entièrement passif et dissocié des terminaux d'émission/réception chez l'usager. De cette manière le boîtier de répartition comprenant le coupleur pourra avantageusement être installé sans aucune contrainte d'apport d'énergie ou de distance par rapport aux usagers.In such an optical transmission device, the coupler advantageously constitutes an entirely passive module and dissociated from the transmission / reception terminals at the user's. In this way the distribution box comprising the coupler can advantageously be installed without any constraint of energy supply or distance from users.
Le coupleur affecte à chaque ligne de transmission individuelle une fenêtre spectrale dédiée à un usager. Les lignes optiques ne transportent donc pas la totalité du signal principal mais seulement la partie extraite par le démultiplexeur et contenant les informations relatives à un usager. C'est pourquoi, ces lignes de transmission individuelles autorisent un plus grand débit que dans l'art antérieur.The coupler assigns a spectral window dedicated to a user to each individual transmission line. The optical lines therefore do not transport the entire main signal but only the part extracted by the demultiplexer and containing the information relating to a user. This is why these individual transmission lines allow a higher speed than in the prior art.
Chaque terminal d'usager est configuré en fonction du contrat que celui-ci a souscrit à l'opérateur réseau. Cette configuration inclut en particulier le débit qui lui est affecté. Le réseau permet d'échanger outre les informations destinées à un usager du réseau, des informations de gestion de configuration. A cet effet, des signaux supportant des informations de gestion sont associés aux signaux "utiles" contenant les informations à transmettre. Ces signaux de gestion peuvent contenir des information en provenance d'un usager et indiquant sa configuration. De telles informations concernant tous les usagers sont envoyées vers un centre de gestion accessible à l'opérateur du réseau.Each user terminal is configured according to the contract that it has signed with the network operator. This configuration includes in particular the flow assigned to it. The network makes it possible to exchange, in addition to the information intended for a user of the network, configuration management information. To this end, signals supporting management information are associated with "useful" signals containing the information to be transmitted. These management signals can contain information originating from a user and indicating his configuration. Such information concerning all users is sent to a management center accessible to the network operator.
Grâce à ce centre de gestion, l'opérateur peut recevoir les signaux de gestion en provenance des usagers, mais il peut aussi transmettre des signaux de gestion contenant des instructions de modification de la configuration d'un usager. Ces signaux de commande sont transmis via le réseau optique à des modules de réception et d'émission multidébit implantés dans les terminaux d'usager.Thanks to this management center, the operator can receive management signals from users, but it can also transmit management signals containing instructions for modifying the configuration of a user. These control signals are transmitted via the optical network to multi-speed reception and transmission modules installed in the user terminals.
D'autres caractéristiques et avantages ressortiront encore de la description qui suit, laquelle est purement illustrative et non limitative et doit être lue en regard des dessins annexés parmi lesquels:Other characteristics and advantages will also emerge from the description which follows, which is purely illustrative and not limiting and should be read with reference to the appended drawings among which:
- la figure 1 est un schéma représentatif d'un exemple de structure de réseau conforme à l'invention,FIG. 1 is a diagram representing an example of a network structure in accordance with the invention,
- la figure 2 est un spectre fréquentiel d'un signal transporté par l'une des lignes de transmission individuelles.- Figure 2 is a frequency spectrum of a signal carried by one of the individual transmission lines.
Sur la figure 1 , le réseau optique comprend un nœud principal 1 relié par une ligne de transmission principale 2 à un module séparateur WDM optique 3. Le module séparateur 3 est connecté aux différents terminaux d'émission/réception 5 par des lignes de transmission individuelles haut débit 4 (entre 100 Mbit/s et 2,5 Gbit/s). Chaque terminal est implanté chez un usager. Avantageusement, les lignes sont constituées d'au moins une paire de fibres assurant la transmission de signaux aller et de signaux retour et permettant d'accroître encore le débit du réseau.In FIG. 1, the optical network comprises a main node 1 connected by a main transmission line 2 to an optical WDM splitter module 3. The splitter module 3 is connected to the various transmission / reception terminals 5 by individual transmission lines broadband 4 (between 100 Mbit / s and 2.5 Gbit / s). Each terminal is located with a user. Advantageously, the lines are made up at least one pair of fibers ensuring the transmission of outward and return signals and making it possible to further increase the network speed.
Le nœud principal 1 assure le lien entre des réseaux filaires classiques de transmission d'informations et le réseau optique. Ce nœud principal comprend des transpondeurs émission/réception 6 connectés à différents réseaux filaires de communication tels que Fast Ethernet (100 MHz), ATM 155, Giga Ethernet (1GHz) ou Escon. Ces transpondeurs 6 assurent la conversion des signaux électriques en signaux optiques "utiles". Les signaux optiques "utiles" sont transmis à un multiplexeur/démultiplexeur optique 7. Les différents signaux optiques sont multiplexes fréquentiellement et transmis via la ligne de transmission principale 2 au module séparateur WDM 3 qui répartit les différentes fréquences transportées sur les différentes lignes de transmission individuelles 4.The main node 1 provides the link between conventional wired information transmission networks and the optical network. This main node includes transmit / receive transponders 6 connected to different wired communication networks such as Fast Ethernet (100 MHz), ATM 155, Giga Ethernet (1GHz) or Escon. These transponders 6 convert the electrical signals into "useful" optical signals. The "useful" optical signals are transmitted to an optical multiplexer / demultiplexer 7. The different optical signals are frequency-multiplexed and transmitted via the main transmission line 2 to the WDM splitter module 3 which distributes the different frequencies transported on the different individual transmission lines 4.
Les différentes fréquences sont réparties sur les lignes de transmission individuelles 4 par filtrage des signaux transmis par la ligne de transmission principale au moyen de filtres optiques interférentiels. Ces filtres présentent une très faibles dérive thermique, typiquement de l'ordre de 1 picomètre par degré.The different frequencies are distributed over the individual transmission lines 4 by filtering the signals transmitted by the main transmission line by means of interference optical filters. These filters have very little thermal drift, typically of the order of 1 picometer per degree.
Les filtres interférentiels sont constitués de fines couches de matériaux diélectriques ou métalliques présentant des indices de réfraction différents. Ils permettent de sélectionner des longueurs d'onde grâce à des effets d'interférence qui se produisent à la surface des couches entre les ondes incidentes et les ondes réfléchies. Ils présentent en outre un coefficient d'absorption quasiment nul pour les longueurs d'ondes transmises.Interference filters are made up of thin layers of dielectric or metallic materials with different refractive indices. They make it possible to select wavelengths thanks to interference effects which occur on the surface of the layers between the incident waves and the reflected waves. They also have an almost zero absorption coefficient for the transmitted wavelengths.
Le module WDM 3 peut comprendre des filtres tels que ceux commercialisés par les sociétés JDS, Corning ou E-Tek. Par exemple, la société JDS propose des filtres interférentiels sous les dénominations "WD1508 M1", "WD1508 M2", "WD1508 D1" et "WD1508 D2" aptes à multiplexer ou démultiplexer 8 canaux WDM espacés de 100 ou de 200 GHz. Ces filtres fonctionnent à des températures comprises entre 0 et 50°C tout en conservant leur caractéristiques de filtres étroits. Un module de gestion 8 est relié au multiplexeur/démultiplexeur optique 7. Ce module de gestion 8 transmet au multiplexeur/démultiplexeur 7 des signaux bas débit (de 1 à 64 kbit) supportant des informations de gestion de configuration. Le multiplexeur/démultiplexeur 7 transmet d'une part les signaux "utiles" destinés aux usagers et d'autre part des informations de gestion de configuration par surmodulation de la porteuse optique spécifique à chaque usager.The WDM 3 module can include filters such as those sold by the companies JDS, Corning or E-Tek. For example, the company JDS offers interference filters under the names "WD1508 M1", "WD1508 M2", "WD1508 D1" and "WD1508 D2" capable of multiplexing or demultiplexing 8 WDM channels spaced from 100 or 200 GHz. These filters operate at temperatures between 0 and 50 ° C while retaining their characteristics of narrow filters. A management module 8 is connected to the optical multiplexer / demultiplexer 7. This management module 8 transmits to the multiplexer / demultiplexer 7 low bit rate signals (from 1 to 64 kbit) supporting configuration management information. The multiplexer / demultiplexer 7 transmits on the one hand the "useful" signals intended for the users and on the other hand configuration management information by overmodulation of the optical carrier specific to each user.
La figure 2 est un exemple de spectre de signal transporté par l'une des lignes de transmission individuelles 4. Il fait apparaître un signal utile 9 dans une gamme de fréquence dédiée à un usager et un signal bas débit 10 présentant une fréquence plus faible contenant les informations de gestion.FIG. 2 is an example of a signal spectrum transported by one of the individual transmission lines 4. It shows a useful signal 9 in a frequency range dedicated to a user and a low bit rate signal 10 having a lower frequency containing management information.
Les signaux surmodulés de gestion de configuration 10 commandent par exemple la fréquence d'horloge d'un terminal d'usager 5. Ces signaux de gestion 10 permettent donc de modifier la valeur du débit attribué à l'un des usagers.The over-modulated configuration management signals 10 control for example the clock frequency of a user terminal 5. These management signals 10 therefore make it possible to modify the value of the bit rate allocated to one of the users.
Le multiplexeur/démultiplexeur 7 reçoit aussi en retour des information "utiles" 9 en provenance des terminaux 5 des usagers et des informations de gestion de configuration 10 concernant ces terminaux 5. Le multiplexeur/démultiplexeur 7 transmet les signaux "utiles" 9 aux transpondeurs 6 qui les convertissent en signaux électriques pour les envoyer sur les différents réseaux de communication filaires. Il extrait en parallèle les signaux 10 contenant des informations de configuration des usagers et les transmet au module de gestion 8. Le module de gestion 8 est connecté à un réseau de communication par lequel il transmet ces informations à un centre de gestion de l'opérateur réseau.The multiplexer / demultiplexer 7 also receives in return "useful" information 9 coming from the user terminals 5 and configuration management information 10 concerning these terminals 5. The multiplexer / demultiplexer 7 transmits the "useful" signals 9 to the transponders 6 which convert them into electrical signals to send them over the different wired communication networks. It extracts in parallel the signals 10 containing user configuration information and transmits them to the management module 8. The management module 8 is connected to a communication network by which it transmits this information to an operator management center network.
L'opérateur réseau a accès au centre de gestion et peut ainsi connaître les données de configuration et de performance des équipements chez les différents usagers. Il peut en outre envoyer des instructions de modification de configuration. Ce centre de gestion peut par exemple être implanté chez l'opérateur à distance du réseau optique et peut gérer des informations en provenance de plusieurs nœuds de même type que le nœud 1 inclus dans d'autres réseaux optiques. The network operator has access to the management center and can thus know the configuration and performance data of the equipment for the different users. It can also send configuration change instructions. This management center can for example be located at the operator's remote from the optical network and can manage information coming from several nodes of the same type as node 1 included in other optical networks.

Claims

REVENDICATIONS
1. Dispositif de transmission optique comprenant au moins un nœud principal (1) recevant les signaux en provenance d'un ou plusieurs réseau(x) de communication filaires et les convertissant en signaux optiques, ainsi qu'au moins une ligne de transmission optique (2) transmettant des signaux optiques multiplexes en longueur d'onde, et s'étendant entre le nœud principal (1 ) et un coupleur (3), le dispositif comportant des lignes de transmission optiques individuelles (4), chacune s'étendant entre le coupleur (3) et un terminal d'émission/réception (5) chez un usager, le coupleur (3) étant un module optique qui sépare les différentes longueurs d'onde pour les répartir sur les différentes lignes de transmission individuelles (4), caractérisé en ce que le coupleur (3) est du type à filtre(s) optique(s) interférentiel(s).1. Optical transmission device comprising at least one main node (1) receiving the signals coming from one or more wired communication network (s) and converting them into optical signals, as well as at least one optical transmission line ( 2) transmitting optical signals multiplex in wavelength, and extending between the main node (1) and a coupler (3), the device comprising individual optical transmission lines (4), each extending between the coupler (3) and a transmission / reception terminal (5) at a user's home, the coupler (3) being an optical module which separates the different wavelengths to distribute them over the different individual transmission lines (4), characterized in that the coupler (3) is of the type with an interference optical filter (s).
2. Dispositif de transmission optique selon la revendication 1 , caractérisé en ce que chaque terminal d'émission/réception (5) chez l'usager comprend des moyens pour émettre un signal optique à une longueur d'onde attribuée à l'usager, et en ce que le coupleur (3) est apte à transmettre sur la ligne principale (2) un signal multiplexe correspondant à une combinaison des différents signaux optiques reçus.2. Optical transmission device according to claim 1, characterized in that each transmission / reception terminal (5) at the user's site comprises means for transmitting an optical signal at a wavelength allocated to the user, and in that the coupler (3) is capable of transmitting on the main line (2) a multiplex signal corresponding to a combination of the different optical signals received.
3. Dispositif de transmission optique selon l'une des revendications précédentes, caractérisé en ce que les lignes optiques (2; 4) sont constituées d'au moins deux fibres optiques permettant la transmission de signaux aller et de signaux retour.3. Optical transmission device according to one of the preceding claims, characterized in that the optical lines (2; 4) consist of at least two optical fibers allowing the transmission of go signals and return signals.
4. Dispositif de transmission optique selon les revendications précédentes, caractérisé en ce que la ligne de transmission optique principale (2) transmet aux terminaux d'émission/réception (5) d'une part des signaux "utiles" à destination des usagers et d'autre part des informations gérant leur configuration.4. Optical transmission device according to the preceding claims, characterized in that the main optical transmission line (2) transmits to the transmit / receive terminals (5) on the one hand "useful" signals intended for users and d on the other hand information managing their configuration.
5. Dispositif de transmission optique selon la revendication 4, caractérisé en ce que le nœud principal (1) inclut un multiplexeur/démultiplexeur optique (7), ledit multiplexeur/démultiplexeur (7) étant apte à combiner des informations de gestion de configuration (10) avec les signaux "utiles" (9) par surmodulation de la porteuse optique spécifique à chaque usager.5. Optical transmission device according to claim 4, characterized in that the main node (1) includes an optical multiplexer / demultiplexer (7), said multiplexer / demultiplexer (7) being able to combine configuration management information (10) with the "useful" signals (9) by overmodulation of the optical carrier specific to each user.
6. Dispositif de transmission optique selon l'une des revendications précédentes, caractérisé en ce que la ligne de transmission optique principale (2) transmet au nœud principal (1 ) d'une part des signaux "utiles" en provenance des usagers et d'autre part des informations gérant la configuration des terminaux d'émission/réception (5).6. Optical transmission device according to one of the preceding claims, characterized in that the main optical transmission line (2) transmits to the main node (1) on the one hand "useful" signals from users and on the other hand, information managing the configuration of the transmission / reception terminals (5).
7. Dispositif de transmission optique selon la revendication 6, caractérisé en ce que les terminaux d'émission/réception (5) sont aptes à combiner des informations de gestion de configuration (10) avec les signaux "utiles" (9) par surmodulation de la porteuse optique spécifique à chaque usager.7. Optical transmission device according to claim 6, characterized in that the transmission / reception terminals (5) are able to combine configuration management information (10) with the "useful" signals (9) by overmodulation of the optical carrier specific to each user.
8. Dispositif de transmission optique selon l'une des revendications 5 à 7, caractérisé en ce que le nœud principal (1) inclut un module de gestion (8) apte à échanger avec le multiplexeur/démultiplexeur (7) des signaux supportant des informations de gestion de configuration.8. Optical transmission device according to one of claims 5 to 7, characterized in that the main node (1) includes a management module (8) capable of exchanging with the multiplexer / demultiplexer (7) signals carrying information configuration management.
9. Dispositif de transmission optique selon la revendication 8, caractérisé en ce que les signaux échangés présentent un débit compris entre 1 et 64 kbit/s.9. Optical transmission device according to claim 8, characterized in that the exchanged signals have a bit rate between 1 and 64 kbit / s.
10. Dispositif de transmission optique selon la revendication 8, caractérisé en ce que le module de gestion (8) est connecté à un réseau de communication par lequel il échange les informations de gestion avec un centre de gestion apte à recevoir et à transmettre via ledit réseau de communication des informations en provenance et à destination d'un ou plusieurs réseaux optiques.10. Optical transmission device according to claim 8, characterized in that the management module (8) is connected to a communication network by which it exchanges management information with a management center capable of receiving and transmitting via said communication network of information from and to one or more optical networks.
11. Dispositif de transmission optique selon l'une des revendications précédentes, caractérisé en ce que la ligne de transmission principale (2) et les lignes de transmission individuelles (4) présentent des débits compris entre 100 Mbit/s et 2,5 Gbit/s. 11. Optical transmission device according to one of the preceding claims, characterized in that the main transmission line (2) and the individual transmission lines (4) have bit rates between 100 Mbit / s and 2.5 Gbit / s.
PCT/FR2002/001211 2001-04-10 2002-04-08 High-speed optical transmission device WO2002084906A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0104853A FR2823393B1 (en) 2001-04-10 2001-04-10 HIGH SPEED OPTICAL TRANSMISSION DEVICE
FR01/04853 2001-04-10

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WO2002084906A1 true WO2002084906A1 (en) 2002-10-24

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441181A (en) * 1980-10-06 1984-04-03 Siemens Aktiengesellschaft Optical wavelength-division multiplex system
EP0849968A2 (en) * 1996-12-18 1998-06-24 Nec Corporation Optical communication system using wavelenght-division multiplexed light
WO1999013607A1 (en) * 1997-09-11 1999-03-18 Ciena Corporation Dense wdm optical multiplexer and demultiplexer
WO2000074278A1 (en) * 1999-05-28 2000-12-07 Advanced Fibre Communications Wdm passive optical network with broadcast overlay

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441181A (en) * 1980-10-06 1984-04-03 Siemens Aktiengesellschaft Optical wavelength-division multiplex system
EP0849968A2 (en) * 1996-12-18 1998-06-24 Nec Corporation Optical communication system using wavelenght-division multiplexed light
WO1999013607A1 (en) * 1997-09-11 1999-03-18 Ciena Corporation Dense wdm optical multiplexer and demultiplexer
WO2000074278A1 (en) * 1999-05-28 2000-12-07 Advanced Fibre Communications Wdm passive optical network with broadcast overlay

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FR2823393A1 (en) 2002-10-11

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