Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04J—MULTIPLEX COMMUNICATION
  • H04J14/00—Optical multiplex systems
  • H04J14/02—Wavelength-division multiplex systems
• • 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
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
  • H04B10/27—Arrangements for networking
• • 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
• • 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
  • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
  • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
  • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
• • 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
  • H04J14/0245—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
  • H04J14/0247—Sharing one wavelength for at least a group of ONUs
• • 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
  • H04J14/0227—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
  • H04J14/0252—Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/02—Details
  • H04L12/16—Arrangements for providing special services to substations
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q11/00—Selecting arrangements for multiplex systems
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q11/00—Selecting arrangements for multiplex systems
  • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
  • H04Q11/0062—Network aspects
  • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q11/00—Selecting arrangements for multiplex systems
  • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
  • H04Q11/0062—Network aspects
  • H04Q11/0071—Provisions for the electrical-optical layer interface

Definitions

• Multiservice private network and interface modules making it possible to convey data in different formats over such a network
• the present invention relates to a multiservice private network architecture and interface modules, each of these modules being dedicated to interface a given terminal equipment in a multiservice private network.
• the invention lies in the field of communication networks, and more particularly in the field of optical networks for private or indoor applications. More specifically, private or indoor networks are networks used by individuals in their homes.
• the invention typically finds application particularly in the interconnection, by the same network, of different heterogeneous terminal equipment, so that the compatible terminals communicate directly with each other, without interfering with the communications between the others.
• terminals of different nature Heterogeneous equipment means equipment capable of conveying data in different formats.
• a television, a computer or an audio system are heterogeneous equipment because they convey data that does not have the same format at all.
• the invention thus makes it possible to superimpose the services offered by a telecommunications operator to other domestic services that the telecommunications operator does not offer.
• a private network generally comprises a gateway, also called "gateway" in English terminology, which allows interfacing the private network with an access network outside the private premises, this access network being managed by a telecommunications operator .
• the gateway usually also has the role of organizing the exchanges between the private network equipment, and to isolate the local traffic from the outside traffic.
• Non-wired solutions use the techniques of radio or optics in free space.
• radio-based solutions lack confidentiality, which is detrimental to data security. They are also vulnerable because they easily undergo interference phenomena due to environmental conditions, and they also have a limited flow.
• wired solutions rely on a cabling architecture.
• Many supports exist for making such wiring which are essentially copper in the form of twisted pairs, coaxial cables, or energy cable, and monomode or multimode optical fibers made of silica, polymer or other material.
• the data is carried in a conventional telecommunications format, such as IP or ATM.
• IP or ATM telecommunications format
• these solutions are limited because they do not allow to convey signals requiring a large bandwidth.
• high frequency signals from a terrestrial television antenna can not be carried on the twisted pair cables.
• the technique uses specific modems to convey high-speed signals on the power grid. This technology is very attractive, but the bit rate is still limited, and requires that the data be formatted in the same way, so that a superposition of several heterogeneous services can not be seriously considered. In view of a rise in the flow of residential networks, this technology is also insufficient to support the constraints of the residential core network.
• Fiber-based cabling is the most scalable solution, given the life expectancy of indoor cabling and the uncertainty over bandwidth requirements during network usage.
• PON type an architecture modeled on network architectures for access
• FIG. 1 Such an architecture comprises a gateway GTW connected by optical fiber cables C1-C4, and via an optical coupler 1 to N 100, to several devices such as, for example, a personal computer 10. , a set-top box and television receiver 20, a printer 30 etc.
• the gateway is located at the head of the network and it is it that manages the traffic since all the exchanged data pass through it. This traffic can come from the access network of an operator to a terminal located in the private environment or vice versa.
• the computer 10 can communicate with the printer 30, or the external network, via the optical color 100 and the gateway GTW.
• the technical problem of the present invention is to provide a multiservice private network, including access points and points. of destination to which N terminal equipment is connected, said private network being configured to provide a summation of all the signals injected at each access point, then a broadcast of this summation to all the destination points, which would make it possible to connect, on the same network, different terminal equipment regardless of the format of the data they carry, and to interconnect the compatible terminals between them so that they can communicate directly.
• Such a network architecture would then superimpose a multitude of domestic services and services from an external access network, and obtain a perfect seal between the different services so that any interference would be avoided.
• the summed and diffused signals are in the form of a multiplex of wavelengths, and in that N interface modules are connected a to one of the N terminal equipments, each of said N interface modules being arranged to transmit and / or receive data in a format adapted to the terminal equipment connected to it, said format being particular to a length of d specific wave, for interconnecting, through said private network, at least two equipment compatible among them among the N terminal equipment.
• wavelength multiplexing technology, and interface modules makes it possible to connect heterogeneous terminals to the same network, and to interconnect the compatible terminals with each other so that they can be connected to the same network. communicate directly with each other.
• the network can thus convey different types of services while ensuring a perfect seal, each service being conveyed on a particular wavelength between particular terminal equipments.
• each interface module transmits on a specific wavelength and receives on a specific wavelength, which may be the same or different from the emission wavelength, and communicates with one or more other modules. transmitting at its reception wavelength and receiving at its emission wavelength.
• the modules communicating with each other then make it possible to interconnect the terminal equipment connected to them. It is therefore possible to create subnets of interconnected equipment, equipment that can also be connected to two different subnets.
• interconnected equipment forming a first sub-network is capable of exchanging data in a first format compatible with them and which is different from a second format of data exchanged between interconnected terminal equipments in another sub-network. .
• Such a private network therefore makes it possible to distribute, in the various rooms of a home, the voice / data / image services, whether they come from the access network of an operator or from internal sources related to the user, such as audio, video equipment, etc., or other sources related to other operators such as terrestrial, cable or satellite television.
• Such a private network also makes it possible to convey control signals for controlling various domestic equipment. Thanks to the network architecture according to the invention, it is therefore possible to coexist very diverse services in any format.
• Another object of the present invention relates to an interface module intended to be connected to a terminal equipment of a multiservice private network, which would make it possible to interconnect, through the a multiservice private network, between at least two mutually compatible terminal equipments, so that they communicate with each other directly, in their own format, and which would have a simple structure so that the cost price is the lowest possible.
• This module is remarkable in that it is arranged to transmit and / or receive data in a format adapted to the terminal equipment connected to it, said format being particular at a specific wavelength, in order to to allow interconnection, through said multiservice private network, said terminal equipment with at least one other terminal equipment that is compatible among N terminal equipment.
• this module comprises:
• a transmitting data formatting unit arranged so as to adapt the signals coming from the terminal equipment connected to it and to transform them into a signal adapted to the constraints of its transmission by said private network
• control electronics receiving the signal resulting from the processing carried out by the transmitting data shaping unit and intended to drive an optical transmitter to emit the said signal at a specific wavelength
• an optical receiver intended to select and detecting, among a set of signals of a wavelength multiplex, a signal at a specific wavelength for the terminal equipment connected thereto, and a receiving electronics for transforming the electrical signal from the optical receiver into an electrical signal compatible with
• a receiving data formatting unit arranged to restore the signal from the receiving electronics in a signal understandable by the terminal equipment connected to it.
• the data exchanged on the private network are received by an interface module at a reception wavelength, and then they are processed by a reception interface, formed of the reception data formatting unit and reception electronics.
• the processed data are then sent back to the terminal equipment connected to the module, in a format understandable by this terminal equipment.
• the terminal equipment also transmits data to be conveyed on the network to one or more other equipment.
• a transmitting interface formed of the transmission data shaping unit and the control electronics of the optical transmitter, therefore processes the data from the equipment and transmits them to the transmitter. which emits them on the network at a specific wavelength.
• the module therefore makes it possible to send and receive data in a particular format at a specific wavelength chosen from a number n of usable wavelengths on the network, so as to convey a particular service.
• Each interface module connected to a terminal equipment therefore makes it possible to convey a specific service compatible with this terminal equipment.
• the transmitting data shaping unit and the control electronics form a transmission interface, the data shaping unit in reception and the electronics of the transmission.
• receiving module and the module is formed of an appropriate assembly of a transmitting interface, a receiving interface, an optical transmitter and an optical receiver adapted to the application to which he is dedicated.
• This feature is particularly advantageous because it allows to quickly and easily achieve an interface module dedicated to a particular terminal equipment and a particular service, in the context of the realization of a multiservice private network, by assembling appropriate elements.
• FIG. 1 already described, a known private network architecture of the PON type;
• FIG. 2 a block diagram of a private network architecture according to the invention
• FIG. 3 the architecture of FIG. 2 implemented in a particular application
• FIG. 4 a block diagram of an interface module according to the invention and intended for a particular application
• FIG. 5 a diagram of another embodiment of the interface module of FIG. 4 intended for a second particular application
• FIG. 6 a diagram of another embodiment of the interface module of FIG. 4 intended for a third particular application
• FIG. 7 a diagram of yet another embodiment of the interface module of Figure 4 for yet another particular application.
• FIG. 2 schematizes the principle of a network architecture according to the present invention.
• This private network architecture particularly combines an optical cabling ensuring the function of a "broadcast and select" type network, without intermediate optoelectronic or electro-optical conversion, and wavelength division multiplexing technologies.
• Broadcast and select network means a network, comprising access points and destination points, configured to provide a summation of all the signals that are injected at each access point, then a diffusion of this summation to all the points of destination.
• the access and destination points are usually co-located.
• a passive optical coupler star 200 as shown in Figure 2.
• the signals from each access point arrive on the ports of the NXN coupler, which provides summation of these signals and broadcasts them, in the form of a wavelength multiplex (WDM), to all destination points.
• WDM wavelength multiplex
• a particular device M1-M5 connected to each destination point, makes it possible to select and detect a signal at a wavelength chosen from the set of wavelengths of the multiplex, then transmit the selected signal to a terminal equipment Tl-T4, GTW connected to it.
• the wiring is, in this example, a star wiring around the passive optical coupler NXN 200.
• each fiber is ending respectively with an access point and a destination point, so as to ensure bidirectional transmission.
• the wiring connects this coupler to optical connection points M1-M5 located in the different rooms P1-P4 of the room where the network is installed.
• the various terminal equipment T1-T4 to be connected, located in different rooms P1 - P4 of this room, are connected to the destination points of the private network via these optical connection points M1-M4, also called interface modules thereafter.
• each terminal equipment is connected to an interface module which is dedicated to it.
• a more complex module can be used, allowing the connection to this module of several terminal equipment, heterogeneous or not.
• a GTW gateway is connected on the one hand to an external RA access network to the local and on the other hand to the private network.
• the gateway is connected to it in a manner identical to another equipment, that is to say via an interface module M5.
• the gateway may be collocated with the passive coupler 200, possibly in the same housing.
• the interface modules are arranged to allow interconnection of at least two compatible end devices among them among all the terminal equipment connected to the private network. In fact, thanks to these interface modules which can each transmit and / or receive at a particular wavelength, it is possible to create sub-networks of equipment interconnected. It is even possible to consider connecting a terminal equipment to two different subnets.
• the services coming from the RA access network transit and are distributed in the private premises by the GTW gateway.
• the user can also use this gateway GTW to treat his local traffic if he wishes, provided then work at the same wavelength as the network federated by this gateway, and interconnecting terminal equipment via modules of interface using the same format for the data.
• the services processed by the gateway which are generally derived from the access network of a telecommunications operator, are referred to as first-rate services.
• a gateway 380 broadcasts information, via an interface module M80, over a wavelength ⁇ 1 to the equipment 350, 360 and 370 which are for example respectively a television associated with a suitable decoder, an IP phone and a computer.
• the information conveyed by the gateway is in a format understandable by it, that is to say in an ATM or IP format for example.
• the communications between the gateway 380 and the terminal equipments 350, 360 and 370 are therefore done using a "virtual" PON, with ⁇ 1 as the falling wavelength and ⁇ 2 as the rising wavelength, via the M50 interface modules.
• the exchange between the gateway 380 and the equipment 370 corresponds to an Internet data type service
• the exchange between the gateway 380 and the equipment 360 corresponds to an IP telephony service
• the exchange between the gateway 380 and the equipment 350 corresponds to a digital image broadcast service from the access network.
• the gateway 380, the television 350 and its decoder, the IP 360 phone and the computer 370 form a first sub-network of interconnected equipment.
• a satellite reception set is connected to the equipment 320, which makes it possible to broadcast at a wavelength ⁇ 3 a television program in the format delivered by the satellite receiver, a program received by the equipment 340 of type television.
• the equipment 320 and 340 form a second sub-network of interconnected equipment.
• the equipment 320 is specialized in transmission, so that the connected M20 interface module has no receiving elements to reduce the cost.
• the interface module M40 connected to the equipment 340, specialized in reception has no transmission element.
• these transmission elements in the module M40, and reception in the module M20 can be retained for the transfer of remote command orders for example.
• Another sub-network of interconnected equipment consists, at the same time, in connecting the equipment 310 and 330, via interface modules Ml0, M30 emitting and receiving at the same wavelength ⁇ 4.
• These two terminal equipments consisting for example of two computers then form a sub-network of the LAN (Local Area Network) type, and exchange data in an ethernet format, isolated from the rest of the network. and the access network since the usage wavelength is different from the wavelength of the first subnet federated by the gateway 380. Thanks to the presence of the interface modules, a user can therefore use the infrastructure of his private optical network to convey services of all kinds corresponding to his own needs, without constraints of format and without interference with the traffic of first order, from the gateway 380.
• LAN Local Area Network
• FIG. 4 schematizes the principle of an interface module according to the invention.
• Such an interface module comprises, on the application side, that is to say on the side of the terminal equipment T connected thereto, an electronic data processing area Z1, and on the private network side a zone Z2 of optical signal processing.
• zone Z1 carries out the interfacing with the terminal equipment to be connected, which implies being able to take into account or to be able to restore signals adapted to the application concerned.
• zone Z1 comprises, for each direction of transmission, when the module is intended to operate in both directions of transmission, on the one hand an MFDe unit for formatting data transmitted from the terminal equipment. connected to it and an electronic control unit ECEO, and secondly a reception electronics and a unit MFDr data formatting reception to the terminal equipment.
• Zone Z2 includes optical components to allow interfacing with the optical infrastructure and provide a seal between the various services simultaneously conveyed by the network. This zone makes it possible to transmit and / or receive the data at a particular wavelength.
• zone Z2 comprises an optical transmitter EO, connected to an access point of the private network, and an optical detector associated with an optical receiver RO, connected to a destination point of the private network.
• the MFDe transmitting data formatting unit adapts the signals from the terminal, usually electrical signals, and transforms them into a signal that will be transmitted over the optical network.
• the ECEO control electronics is used to control the EO optical transmitter. It receives as input the signal resulting from the processing, performed by the MFDe unit, of the data present at the input of the module. It controls a light source, such as a laser for example, used in the optical transmitter to modulate the signal at a specific wavelength. In a simple embodiment, this part adapts the signal from the MFDe unit to the characteristics of the transmission component.
• this part can, in addition, perform a control of the emission wavelength of the optical transmitter.
• the optical transmitter EO is then responsible for transforming the signal from the ECEO control electronics into an optical signal adapted to the characteristics of the network corresponding to the invention, that is to say at a particular wavelength ⁇ i allowing separate the corresponding service from other services.
• a transmitting component emitting at a fixed wavelength is implemented.
• this component can be wavelength-tunable.
• the optical transmitter EO can thus be produced according to several modes. It can for example be made to emit at a fixed wavelength, low spectral bandwidth, or so as to emit at a switchable wavelength, low spectral bandwidth.
• the transmitter is made in such a way that it emits at a wavelength tunable, low spectral bandwidth.
• the optical transmitter may be designed to emit a broad spectral band. In this case, it is associated with a narrow spectral filter in order to keep at the output of the assembly only a signal with a low spectral bandwidth.
• an optical receiver RO is responsible for keeping, among the set of signals reaching it at different wavelengths ⁇ i, only the signal it has the function of receiving, for the intended application, a particular wavelength ⁇ i, and detecting this signal to transform it into an electrical signal.
• this optical receiver can be fixed, and only be able to receive a given wavelength, or tunable.
• it is the combination of a fixed spectral optical filter and a photoreceptor.
• the optical filter then makes it possible to select the wavelength arriving on the photodetector.
• it is the combination of a tunable spectral optical filter and a photoreceptor, or possibly a more complex component providing the two functions of tunable optical filtering and photo-detection.
• the reception electronics ER processes the signal from the optical receiver RO. It amplifies and reshapes the low-level electrical signal provided by the photodetector of the optical receiver, such as a photodiode for example, to make this signal compatible with subsequent electronic processing by the MFDr unit.
• the receiving data formatting unit MFDr performs the function symmetrical to that performed by the MFDe unit. From the signal coming from the network, this part must restore signals understandable by the terminal, for the intended application.
• the module depending on whether the aim is the lowest possible cost, or the greatest simplicity of use, at the cost of a technical complexity of the module.
• the realization of the interface modules must be oriented low cost to remain compatible with very general public applications. This implies to design a range of modules according to the services envisaged.
• the optical components, transmitters, receivers, optical filters may be identical, at the choice of the wavelength, whatever the service for which the module is intended.
• An advantageous embodiment consists in fact in making a modular module, by assembling elements, depending on the intended application.
• the transmission elements MFDe and ECEO of the zone Z1 can, for example, be associated in an IES service transmission interface, just as the reception elements ER and MFDr of the zone Z1 can be associated in one embodiment. 1RS service reception interface.
• the interface module of FIG. 4 can be applied to a "home telecom PON" type service. Such an interface module allows in this case to communicate the equipment that is connected to it
• This equipment therefore has on the application side, in the MFDe or MFDr data formatting unit, standardized interfaces, of the Ethernet, ATM or other type ..., and on the private network side the adapted optical elements, such as an optical transmitter EO with fixed and calibrated wavelength, or tunable, a wavelength optical filter and a photodetector.
• FIG. 5 schematizes another example of an interface module adapted to broadcast audio signals in all the rooms of a room from a source, such as an audio channel for example, belonging to the user.
• the interface module shown here may be used at both ends, i.e. two similar modules may be connected to the audio system which generates the audio signals and the other to a playback equipment of the audio system. sound, such as an amplifier associated with speakers.
• Left G and right D signals are digitized and then electronically multiplexed Mu.
• N When a digital type signal N is available on the equipment of the user, it is also multiplexed with the signals G and D previously digitized.
• the resulting multiplexing signal is used to modulate the optical transmitter EO.
• the signals are demultiplexed DM and available to be injected into an audio amplifier associated with speakers in this example.
• the modules can be simplified by being specialized either in transmission or in reception, the specialized transmission module being used on the side of the audio signal source, whereas the specialized reception module is used on the other side. sound restoration equipment.
• FIG. 6 schematizes the example of a video interface module "baseband".
• This interface module is used to broadcast images, from a private source, type DVD player, VCR or satellite receiver, in a format adapted to this type of service depending on the equipment available to the user.
• the video signals V, left audio AG and right audio AD, from this source are multiplexed electronically Mu, then transmitted to the network by the optical transmitter EO.
• the reception chain of this module makes it possible to trace back to these equipments possible remote control functions TC.
• a similar interface module, but with the input / output functions inverted with respect thereto, is used on the reception side of the images, that is to say on the side of a television monitor for example.
• the transmitting data formatting unit MFDe comprises an electronic processing stage A, such as an amplification for example, making it possible to make the characteristics of the signal to be broadcast compatible with those of the system. of transmission.
• This signal is then transmitted on the private network to serve all rooms in the room.
• the radio or television signals are then available to power a radio tuner, a television receiver, or a video recorder.
• the characteristics of the ECEO control electronics and the EO optical transmitter must take into account the large width of the spectrum to be transmitted, and the linearity constraints for this type of signal. Only the transmission channel has been represented, the reception channel not being a priori useful in this application.
• Yet another service possibility is to create, if the user needs it, a LAN type network isolated from the network federated by the gateway and therefore "invisible" by it, on another wavelength.
• Yet another type of service is to control various home automation functions. Thanks to the presence of the interface modules, the establishment of this type of service does not require to homogenize all the formats of all the control signals that can be encountered in this area.
• the proposed cabling architecture has several advantages.
• fiber-based cabling is scalable, which is a great advantage because the lifetime of a building is important, the network must be able to evolve during this time without much significant changes.
• the architecture is transparent so that it provides almost absolute flexibility. It makes it possible to combine various domestic services and structured telecom services, in very different formats.
• the architecture is coherent, in the sense that the number of accesses that can generally be envisaged is compatible with the state of the art of the technology in terms of the number of ports of the passive optical couplers, as well as with the number of wavelengths that can be used in a low cost CWDM approach
• the link budgets are also compatible with the distances encountered in the environment considered, making it possible to use multimode silica or even polymer fibers, a factor favoring the reduction of the cost of the network, in particular by simplifying the connections .

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Optical Communication System (AREA)
• Small-Scale Networks (AREA)

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• 2004
  • 2004-07-01 FR FR0451385A patent/FR2872655A1/fr active Pending
• 2005
  • 2005-07-01 KR KR1020077002514A patent/KR20070047295A/ko not_active Application Discontinuation
  • 2005-07-01 JP JP2007518652A patent/JP2008504769A/ja active Pending
  • 2005-07-01 US US11/631,499 patent/US8050565B2/en active Active
  • 2005-07-01 EP EP05786074A patent/EP1762030A1/de not_active Withdrawn
  • 2005-07-01 WO PCT/FR2005/001706 patent/WO2006013274A1/fr active Application Filing
  • 2005-07-01 CN CNA2005800221681A patent/CN101002416A/zh active Pending

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