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WO2000067457A1 - Reseau local domestique etendu - Google Patents

Reseau local domestique etendu Download PDF

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Publication number
WO2000067457A1
WO2000067457A1 PCT/IL2000/000244 IL0000244W WO0067457A1 WO 2000067457 A1 WO2000067457 A1 WO 2000067457A1 IL 0000244 W IL0000244 W IL 0000244W WO 0067457 A1 WO0067457 A1 WO 0067457A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal devices
home
module
lan
analog
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.)
Ceased
Application number
PCT/IL2000/000244
Other languages
English (en)
Inventor
Zuri Guzikevits
Nathan Berkovitch
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.)
ECI Telecom Ltd
Original Assignee
ECI Telecom Ltd
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 ECI Telecom Ltd filed Critical ECI Telecom Ltd
Priority to AU41412/00A priority Critical patent/AU4141200A/en
Publication of WO2000067457A1 publication Critical patent/WO2000067457A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L12/2838—Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L12/283—Processing of data at an internetworking point of a home automation network
    • H04L12/2836—Protocol conversion between an external network and a home network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L2012/284—Home automation networks characterised by the type of medium used
    • H04L2012/2845—Telephone line

Definitions

  • the present invention relates to a technology for expanding a home or small office Local Area Network (LAN).
  • LAN Local Area Network
  • POTS Plain Old Telephone System
  • FIG. 1 A typical example of such an architecture is shown in Fig. 1, where one incoming communications line 10 ( POTS, ISDN or ADSL) entering a home or a small office LAN (the right-hand portion of the drawing, indicated with 12) supports analog parallel telephones 14 and a fax machine 16, as well as a PC 18, PC 19 and a laser printer 20 which are provided with appropriate hardware and software to cooperate in the network for digital data communication.
  • the homePNA standard (a standard for home phone network architecture) enables one POTS or ISDN (or ADSL) concurrent connection. In other words, no telephone calls can be made or received by the analog telephone line 14 when any of the computers 18 and 19 are connected to an Internet Service Provider (not shown) via the line 10.
  • US Patent 5,621,731 describes an integrated services digital network (ISDN) private exchange device, which includes connectors for connection to an ISDN local exchange, a plurality of ports for connection to respective analog telephone devices, a plurality of ports for connection to respective digital devices, and an ISDN digital port for connection to at least one additional ISDN terminal device.
  • the private exchange device may include a pair of ports for connection to two different analog telephone devices, each having simultaneous access capability with the ISDN network. Further, the private exchange device may include four ports for connection up to four digital devices, which are each capable of simultaneously accessing the ISDN local exchange.
  • the ISDN digital port can be connected with up to eight ISDN terminals or terminal adapters.
  • the private exchange device may further include a detector for detecting whether the port connected to the local exchange is connected to an ISDN network or to a conventional network and for bypassing an ISDN control circuit if the system detects that it is connected to a conventional analog network.
  • EU - a multiplexing/demultiplexing Exchange Unit situated at or in the vicinity of a local exchange
  • RU a multiplexing/demultiplexing Remote Unit situated at remote subscriber's premises or in their vicinity;
  • NT a network termination module; in the present invention NT is capable of serving as adapter between logical and analog lines; TDM - Time Division Multiplexing;
  • Home LAN this term should be understood to encompass a home and a small office LAN;
  • Provisioning system of an access network comprises one or more legacy (conventional analog) telephone devices connected to the same number.
  • the RU is proximal to the home LAN and forms a part thereof, while the EU is actually remote from the LAN.
  • the above-mentioned main object can be achieved by providing a system for expanding a home LAN based on a home single telephone line and supporting a number of terminal devices including a basic group of analog terminal devices, said system being capable of converting the home LAN into an expanded home LAN supporting at least one additional group of analog terminal devices; said system comprising:
  • an RU module adapted to communicate with an access network via at least one telecommunication path and utilizing a packetized data protocol, said RU module being adapted to demultiplex a multiplexed telecommunication signal received via said at least one path and to transmit the demultiplexed signal via said home single telephone line to the home LAN in a form comprising packetized data; said RU being also capable of multiplexing telecommunication signals received via said home single telephone line from said terminal devices, and transmitting the multiplexed signal to the access network;
  • each of said NT modules being capable of converting between a packetized data protocol utilized by said RU module and a protocol of POTS interface used by said one or more analog terminal devices connected to said NT module; the expanded home LAN thereby enabling concurrent connection of any combination of its terminal devices to the access network.
  • any additional group of analog terminal devices does not require that the number of telecommunication paths between the access network and the home LAN be respectively increased. Actually, a single telecommunication path can be successfully used. Secondly, the home single telephone line stays without any changes while serving those one or more additional groups of analog terminal devices. It should also be noted that the terminal devices of the home LAN may or may not contain any digital terminal devices.
  • the telecommunication path should be understood as a channel capable of delivering both digital data and speech (voice).
  • the telecommunication path can be a DSL (Digital Subscriber Line), which may operate according to any system from the following non-exhaustive list which comprises ISDN and xDSL technologies.
  • the DSL line may constitute a regular POTS pair of copper wire. However, it may be an optical fiber as well.
  • the telecommunication path may constitute a wireless line for transmitting both data and voice.
  • the incoming telecommunication signal is a TDM signal i.e., a signal multiplexed using the Time Division Multiplexing method.
  • a TDM signal i.e., a signal multiplexed using the Time Division Multiplexing method.
  • it may be, for example, an ATM signal.
  • home single telephone line is not limited to any shape of physical wiring in the private apartment, and is just a means originally constructed for supporting one telephone number in a home LAN.
  • the home single telephone line may comprise a physical connection between the RU module and a telephone input/output jack in the private premises, to which all the terminal devices are connected.
  • a user may select any manner of connection of the NT modules suitable for the particular home LAN.
  • the NT module which is connectable at its one end to the home single telephone line, can be connected at its other end either to one or to a number of analog terminal devices - especially if they are located close to each other.
  • analog terminal device(s) of the basic group be also connected to the home single telephone line via associated said NT module(s), thereby converting the basic analog telephone line into a digital telephone line. This option will be discussed later on.
  • said "number of terminal devices" of any Home LAN usually includes one or more digital terminal devices, which communicate with the RU module and with each other by packetized data signals.
  • an expanded home or small office LAN built on a home single telephone line and supporting a number of terminal devices including a basic group of analog terminal devices, said expanded home LAN also supports at least one additional group of analog terminal devices and comprises:
  • an RU module utilizing a packetized data protocol and capable of communicating with an access network via at least one telecommunication path, said RU module being adapted to demultiplex a multiplexed telecommunication signal received via said at least one path for transmitting the demultiplexed signal to the home LAN via said home single telephone line in a form comprising packetized data; said RU being also capable of multiplexing telecommunication signals received via said home single telephone line from said terminal devices, and of further transmitting the multiplexed signal to the access network;
  • NT modules connected between the home single telephone line and all terminal analog devices of at least said one additional group; each of said NT modules serving as an adapter between a packetized data protocol utilized by said
  • one additional phone line must be activated in the access network for respectively supporting each additional group of analog terminal devices. It is important to emphasize that no additional home lines are required in the LAN, and no additional telecommunication paths are required per each additional group of the analog devices.
  • all analog terminal devices in the LAN can be provided with the mentioned NT modules, thus the purpose will be achieved by replacing the existing analog telephone line with two or more logical telephone lines.
  • the incoming telecommunication signal demultiplexed by said RU module will thereby comprise packetized data addressed both to the digital terminal devices of the LAN, and to the mentioned two or more logical telephone lines.
  • the telecommunication signals entering the RU module from the home LAN will represent packetized data.
  • the analog terminal devices of said additional group(s) are connected to the home single telephone line via the NT modules, while the basic group of analog terminal devices is left unchanged. Owing to that, the basic analog telephone line is retained and one or more additional logic telephone lines are prepared.
  • the incoming telecommunication signal after being demultiplexed by the RU module, is transmitted to the home LAN in the form of packetized data combined with an analog signal (the latter intended for the basic group of the terminal devices).
  • the RU module is capable of multiplexing the packetized and analog telecommunication signals arriving from the home LAN, for transmitting thereof to the access network.
  • the RU module is preferably provided with home LAN software
  • SW and hardware (HW) support capable of executing a HomePNA packetized protocol
  • each of said NT blocks is configured to enable bridging between the homePNA protocol on the RU side and the protocol of POTS interface on the side of the analog telephone.
  • the obtained expanded Home LAN is therefore capable of conversion between the HomePNA packetized protocol and analog POTS interface.
  • Parallel connection of one or more NT modules to the home single telephone line thus enables adding phone lines without providing additional physical or wireless connection between the access network and the user (home LAN).
  • the expanded home LAN when provided with the novel system, is capable of supporting additional logical lines, which, being fitted with the respective NT modules, become adapted to support standard POTS telephones.
  • the result achieved by the invention is owing to integration of a single telephone line based home network with a telecommunication path such as a wireless line, DSL in the form of a pair gain, line of ISDN, ADSL, optical fiber, etc. No physical or wireless line is required to be connected between the access network and the home for adding another phone line. Most important, no additional internal (home) phone line is required.
  • an extra communication line is activated in the access network upon the subscriber's request, while the subscriber is instructed to purchase the appropriate NT module(s) and to connect thereof between specific analog telephone apparatus and the home single telephone line in the private net.
  • the extra communication line in the access network can be activated in a number of ways. For example, an operator can provide it in the local access network, manually or remotely via its OAMP system.
  • the access network may comprise an EU module which can be a standard analog POTS interface exchange unit (see Fig. 2a). However, a digital telephony interface, such as ISDN or El/Tl can also be used. It should be appreciated that other embodiments of the access network are possible.
  • the EU may be provided with a data interface and a routing capability for effecting connections in the data network.
  • the RU should have a limited routing capability, to filter out local network traffic and allow for only relevant upstream data.
  • the RU module may be adapted to perform some functions of a local exchange, so that the additional phone line(s) can be activated using the RU itself (see Fig. 2b); still, no additional internal phone line is required in the private premises.
  • an RU module with a telephony user interface utilizing a packetized data protocol for supporting at least one home LAN comprising a home single telephone line connected to a number of terminal devices including two or more groups of analog terminal devices; said RU module is capable of: demultiplexing a multiplexed signal received from an access network and transferring the demultiplexed signal to the LAN in a form comprising packetized data, multiplexing at least a portion of telecommunication signals entering the RU module from said home LAN, before transferring thereof to the access network, communicating by analog low frequency signals with at most one of said groups of analog devices, and communicating using the packetized data with at least the remaining groups of analog terminal devices; the RU module being thereby operative to provide concurrent connection of any combination of said terminal devices to the access network.
  • said RU module is adapted to communicate with all "n" (or at least "n-1") of said groups of analog terminal devices by packetized data. It means that in one embodiment, the RU must be capable to communicate with a single group of the analog terminal devices by analog low frequency signals. Again, it is understood, that the access network readily supports all said groups of analog terminal devices. Likewise, the RU module may support more than one LANs.
  • the RU module as well as each of the NT modules, possesses its particular MAC address (i.e., a network address like a network address assigned to a computer).
  • the MAC address is factory defined, and is therefore unique for each NT module in a specific LAN.
  • the NT module can be adapted to support a secondary simple addressing setup feature. Such a feature will enable the subscriber to define the group of each NT, say, by setting a switch.
  • the first informs the second to which group the first belongs, thereupon all relevant information is transmitted from the RU module to the particular group.
  • the RU module will be adapted to transmit the telephony data, addressed to a particular group, to all members of the particular group and, accordingly, to receive telephony data from any terminal device of the group as data outgoing from the group.
  • packetized signals arriving from different terminal devices of the LAN can be recognized according to their particular sender and address, thereby the following functions might be performed by the RU module: a) the internal data traffic in the LAN i.e., the data traveling between the local digital terminal devices can be prevented from flowing out of the LAN, b) data packages addressed by the local digital devices to remote recipients, as well as outside addressed analog telephony signals and/or data packages originated from the newly introduced analog terminal devices should be forwarded to the access network.
  • the RU module can further be provided with PBX ( Private Branch Exchange) functions ( c ), according to which one group of the analog terminal devices is able to make an internal call to another group of the analog terminal devices of the LAN, i.e. such calls can be recognized in the RU module and placed in the home LAN without applying to the access network.
  • PBX Private Branch Exchange
  • the described RU module can be adapted to receive the incoming TDM telecommunication signal, and transmit the outgoing TDM telecommunication signal. It should be appreciated that other multiplexing techniques may be used.
  • the incoming telecommunication signal is transmitted via said telecommunication path being a single DSL line.
  • the RU module may be capable of partially performing functions of a local exchange.
  • an additional phone line(s) can be activated using said RU capability.
  • the RU can be adapted to receive telecommunication signals from at least one additional telecommunication path connected to the access network, and to process all the received signals to transmit thereof to said home LAN via the home single telephone line so as to support more than one group of analog terminal devices of the LAN; the RU being also capable of processing telecommunication signals received from said home LAN for routing thereof to said DSL and said at least one additional telecommunication path.
  • the additional communication path may be a conventional POTS line.
  • the RU module comprises a DSL interface block connected to a microprocessor adapted to process a TDM signal into a combined digital signal and vice versa; said microprocessor cooperating with a first RU block and a second RU block, wherein the first RU block is capable of deriving packetized data according to HomePNA protocol from high frequency components of the combined digital signal using, inter alia, MAC addresses of NT modules and digital terminal devices in the home LAN, and vice versa.
  • the second RU block is capable of analog to digital coding/decoding and interfacing low frequency components of digital/analog signals which are directly addressed to/sent by analog terminal devices of the home LAN.
  • the RU module is preferably provided with a power supply block capable of powering both the standard POTS equipment connected to the phone line, and the NT modules connected to the same line in all line conditions: off-hook, on-hook, ring, etc.
  • the power supply block of RU module preferably draws its power from the DSL or POTS, but can be connected to a local power source if so desired or if the telecommunication path is a wireless link.
  • each of the NT modules is configured so as to enable bridging between the protocol on the HomePNA side and the protocol on the side of the analog POTS interface.
  • the NT module comprises a first and a second interconnected NT blocks being respectively similar by function to the first and the second blocks of said RU module from the point of converting the packetized (high frequency) data to an analog (low frequency) telecommunication signal and vice versa.
  • the first NT module block (that is functionally similar to the first RU module block) is further capable of deriving, from the obtained packetized data, only the portion addressed to the particular group of analog terminal devices, to which the analog terminal device associated with said NT module belongs.
  • the NT module is also provided with a power supply block connected to the internal phone line to draw power therefrom.
  • the NT power supply block may be fed from any local power source.
  • a communication system enabling flexible connection of a home LAN to an access network (and further to WAN), the communication system comprising the home LAN provided with the above-described system for expanding thereof, and one or more additional telecommunication lines activated in the access network for supporting said expanded home LAN.
  • a method of expanding a home LAN built on a home single telephone line and supporting a basic group of analog terminal devices so, as to cause said LAN to support at least one additional group of analog terminal devices comprising the following steps:
  • the mentioned measures can be undertaken either by manually connecting the NT modules in the client's LAN, or by providing appropriate instructions to the client.
  • Fig. 1 illustrates an example of a home LAN with the known architecture (prior art).
  • Fig. 2a illustrates a block-diagram of one example of interconnection between an embodiment of the expanded Home LAN according to the invention and an access network.
  • Fig. 2b shows another example of interconnecting the expanded
  • Fig. 3 is a block-diagram of one embodiment of the RU module according to the invention.
  • Fig. 4 is a block-diagram explaining an exemplary architecture of the NT module according to the invention.
  • Fig. 2a illustrates one embodiment of an expanded Home LAN 22 according to the invention, shown in cooperation with an appropriate access network 24.
  • the home LAN comprises an RU module 26 located in the subscriber's private premises or in its vicinity.
  • RU 26 actually interconnects the Home LAN 22 and the access network 24 by a telecommunication path which, in this example, is a DSL line 28 in the form of ISDN, a pair gain, ADSL or the like.
  • the access network comprises an exchange unit (EU) 30 cooperating with a Public Switchboard 32.
  • the EU can be interconnected with a Data Network 34.
  • the DSL line 28 is responsible of carrying a TDM telecommunication signal from the EU 30 to the RU 26.
  • the home LAN 22 is built on a home single telephone line (schematically shown and marked 36), to which a number of terminal devices are connected in parallel.
  • a basic group of analog terminal devices connected to the same number is schematically marked 38; the group consists of three members - two parallel POTS telephones 38a, 38b and a POTS facsimile machine 38C.
  • the above three parallel terminal devices are also marked to form a telephone line LI (i.e., a basic analog telephone line of the LAN, which is actually the single internal telephone line 36).
  • Two digital terminal devices: a computer 40 and a laser printer 41 are also connected to the internal line 36 to receive therefrom and transmit thereto data in the form of digital packetized telecommunication signals.
  • the line 36 is capable of carrying there-through both analog signals intended for the basic group 38 of analog terminal devices, and the packetized signals for digital terminal devices 40 and 41. It is understood, that appropriate response signals or original "calls" can be transferred from the mentioned terminal devices via the line 36 to the RU 26, for processing, multiplexing and further transmitting thereof to the access network if the last is approved.
  • Additional three POTS telephones 48a, 48b, and 48c are connected to the home single line 36 via NT modules 50, each serving as an adapter between the packetized protocol utilized on the internal phone line (for example, a HomePNA protocol), and analog signals from the side of the analog terminal device.
  • the additional telephones are located close to each other (for example, two telephones 48a and 48b of the same group in a small office), they may be coupled to the line 36 via a common NT module 50.
  • the telephones 48a, 48b and 48c belong to an additional group 48 of analog terminal devices which forms with the RU 26 an additional phone line L2.
  • the analog signal outgoing from any member of the group 48 is converted by the respective NT module 50 into a packetized signal, which is transferred to RU 26 and is processed therein accordingly.
  • the processed signal can be transmitted to the access network via the single DSL line 28 among other fragments of a TDM signal outgoing from RU 26.
  • the packetized signals outgoing from NT modules 50 are recognized by RU 26 for further routing thereof to a separate additional phone line which is to be activated (not shown) in the access network 24, for example between the EU 30 and the public switch 32.
  • Fig. 2b illustrates another embodiment of interconnecting an access network 54 to an expanded LAN 56 similar to that shown in Fig. 2a.
  • the home LAN comprises one internal phone line 58 (the home single telephone line in the form of POTS, which is marked POTS1) supporting analog terminal devices 60a and 60b of a basic telephone line LI, digital terminal devices 62 and 64 and an additional analog terminal device (POTS telephone or fax) 66 forming an additional line L2.
  • the phone 66 is connected to the internal line 58 via an NT module 68.
  • RU 70 partially performs functions of a local exchange of the access network, and is connected both to the DSL line 72, and to an additional physical line 74 which can be a regular pair (marked as POTS 2) that supports the additional line L2 of the LAN.
  • additional physical line 74 is located in the vicinity of the subscriber premises and connected to RU module 70 (which may even be situated in the premises), no additional physical telephone line is required to be placed in the premises for connecting the additional phone 66 to the POTS 2.
  • the function of interconnecting between the phone 66 and the separate line 74 is accomplished by RU 70, in addition to its basic function. Fig.
  • FIG. 3 illustrates a schematic block-diagram of one embodiment of the RU module 26 according to the invention. Its operation is bi-directional, though for the sake of simplicity it will be described for the direction of transmitting a telecommunication signal (say, a TDM signal) from the access network to the home LAN.
  • a TDM signal say, a TDM signal
  • a TDM signal incoming the RU from a telecommunication path shown as a DSL line 80, is received by a DSL interface 82 and transferred therefrom to a microprocessor/logic block 84.
  • a so-called combined digital signal is received and is simultaneously forwarded both to a block 88 (CODEC+SLIC), and a block 86 (HomePNA PHY+MAC+TDM).
  • Block 88 processes the combined digital signal received from block 84 to perform a coding/decoding operation and issue a low frequency analog signal intended for a basic telephone line (via SLIC - a subscriber line interface circuit).
  • Block 86 comprises a physical interface and a logic circuitry capable of selecting those portions of the combined digital signal derived from the TDM signal, which are addressed to various digital terminal devices and to "quasi-digital" devices according to specific MAC addresses of NT blocks and computers in the home LAN. Before forwarding to the home LAN, the selected digital portions are to be converted into the form of high frequency analog signals (packetized data signal). This operation may be provided either in block 86 or, preferably, in block 88 using its CODEC circuitry.
  • the low frequency analog signal (intended for the basic group of analog terminal devices), is finally transmitted to a homeLAN interface 90 together with the high frequency analog signals (packetized data).
  • the home LAN interface 90 is connected to the internal phone line (not shown).
  • the RU module is provided with a power supply block 92 drawing power from the DSL line via the interface 82.
  • the power block 92 can be provided with an optional power input 94 connected to a local power source (not shown).
  • Fig. 4 illustrates an embodiment of the NT module according to the invention, say, an embodiment of the block 68 shown in Fig. 2b.
  • the NT module 68 is connected to the internal phone line (a home single telephone line) 58 via a standard outlet RJ11. Keeping in mind, that telecommunication is a two-way process, operation of the NT module will be described for the receiving path only.
  • a packetized signal entering the NT module 68 from the line 58 is received by a block 100 which, being generally similar to block 86 of the RU module shown in Fig. 3, further selects from the packetized data only the portion bearing the MAC address of this specific NT module (in the general case, the portion bearing the group's address feature).
  • Block 100 is adapted to process signals derived from the TDM incoming telecommunication signal, though it is a specific embodiment suitable to the above-described RU module.
  • the data, obtained in the digital form from the block 100, is then transferred to block 102 (CODEC+SLIC) where the signal overcomes digital to analog conversion and is further transformed to voice tones utilized in the additional analog phone 66.
  • a power supply 104, powering blocks 100 and 102, is capable of drawing power from the RU via the internal phone line 58 and optionally from a local power source (not shown) via an input 106. Operation of the RU and NT modules in the opposite direction, i.e. when performing telecommunications from the home LAN towards the access network, is analogous to that described above.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Multimedia (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un procédé, un système et du matériel permettant d'étendre un réseau local domestique (12) qui comprend une seule ligne téléphonique domestique (10) et supporte un certain nombre de dispositifs de terminaux (14, 16, 18, 19, 20) notamment un groupe basique de dispositifs de terminaux analogues (14, 16). Le réseau local domestique étendu (22, 56) peut supporter au moins un groupe supplémentaire de dispositifs de terminaux analogues (48, 66) sans ajout de ligne téléphonique. Le système comprend un module d'unité à distance (26, 70) qui est conçu pour communiquer avec un réseau d'accès (24, 54) par le biais d'au moins une voie de télécommunication (28, 72, 74) et utilise un protocole de données mises en paquet, le module d'unité à distance réalisant des fonctions de multiplexeur/démultiplexeur pour transmettre des signaux entre le réseau d'accès et le réseau local (22, 56) sous une forme comprenant des données mises en paquet. Le système comprend également au moins un module de terminaison de réseau (50, 68) fonctionnant pour connecter tous les dispositifs de terminaux analogues des groupes supplémentaires à la seule ligne téléphonique domestique (36, 58). Dans ledit système, chacun des modules de terminaison de réseau sert d'adaptateur entre un protocole de données mises en paquet utilisé par le module d'unité à distance et un protocole d'interface de service téléphonique traditionnel utilisé par des dispositifs de terminaux analogues connectés audit module de terminaison de réseau. Le réseau local domestique, ainsi étendu, permet des connexions simultanées de toute combinaison de ses dispositifs de terminaux au réseau d'accès.
PCT/IL2000/000244 1999-05-04 2000-04-27 Reseau local domestique etendu Ceased WO2000067457A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU41412/00A AU4141200A (en) 1999-05-04 2000-04-27 Expanded home lan

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL12975399A IL129753A (en) 1999-05-04 1999-05-04 Expanded home lan
IL129753 1999-05-04

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WO2000067457A1 true WO2000067457A1 (fr) 2000-11-09

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Citations (2)

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WO1999003255A1 (fr) * 1997-07-07 1999-01-21 Advanced Micro Devices, Inc. Systeme et procede d'isolation active permettant les transferts de donnees locaux et a distance via une liaison de donnees commune
WO1999012330A1 (fr) * 1997-08-28 1999-03-11 Travertine Systems, Inc. Systeme reseau de region locale et procede correspondant

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