EP1400030A1 - Installation for a radiocommunication network - Google Patents

Installation for a radiocommunication network

Info

Publication number
EP1400030A1
EP1400030A1 EP02753119A EP02753119A EP1400030A1 EP 1400030 A1 EP1400030 A1 EP 1400030A1 EP 02753119 A EP02753119 A EP 02753119A EP 02753119 A EP02753119 A EP 02753119A EP 1400030 A1 EP1400030 A1 EP 1400030A1
Authority
EP
European Patent Office
Prior art keywords
network
station
transmitting
communication
site
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
EP02753119A
Other languages
German (de)
French (fr)
Inventor
Pierrick Seite
François JACQUIN
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.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
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 Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Publication of EP1400030A1 publication Critical patent/EP1400030A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5441—Wireless systems or telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5479—Systems for power line communications using repeaters

Definitions

  • the invention relates to a terminal installation for a radiocommunication network.
  • the installation is particularly interesting for a radio communication network in a dense environment, such as an urban environment. It can for example be used for the implementation of a network of WCDMA type (in English: Wideband Code Division Multiple Access), for example UMTS (Universai Mobile Telecommunications System) or of a network of another type.
  • a known terminal installation (FIG. 1) for a radiocommunication network generally comprises a primary station (also called base station or node_B in a UMTS network), and possibly one or more secondary stations (or repeaters).
  • a user of the network having a mobile station 141 connects to a primary or secondary station by a radio link 142 to access the network, that is to say to transmit or receive a communication of the network.
  • a radio link 142 to access the network, that is to say to transmit or receive a communication of the network.
  • Several users can connect simultaneously to the same primary station (or base station).
  • Each primary or secondary station is permanently fixed to an elevated reception site, such as for example on a pylon dedicated to this use in rural areas or on a roof or a building terrace in urban areas.
  • the radiocommunication network itself comprises in particular a set of terminal installations, able to connect to a core network for exchanging communications, for example by means of a radio-relay link, of a satellite link. , a dedicated link or through any other means.
  • the heart of the radiocommunication network includes network management means, means routing and communication management, subscriber management means, etc.
  • a communication is a transmission between two stations of a set of digital data, relating for example to oral communication, instructions or data.
  • a communications packet is then a set of one or more communications carried out in parallel. It will also be said that two stations (fixed or mobile) exchange a communication when one transmits a communication to the other.
  • I / O device will be used to speak of a transmission or reception device capable of transmitting a communication to another I / O device or of receiving a communication from this the latter, via a radio link.
  • a transmission or reception device capable of transmitting a communication to another I / O device or of receiving a communication from this the latter, via a radio link.
  • Such a device essentially comprises, in a known manner, a radio module, capable of modulating or demodulating digital data on a carrier radiofrequency signal and a transmit / receive E / R antenna capable of transmitting or receiving the modulated radiofrequency signal.
  • the size and weight of such an E / R device are directly proportional to its power.
  • the primary station essentially comprises (FIG. 1) a communications processing base, an upper I / O device and a lower I / O device.
  • the E / R devices each include in particular a radio module; in the example illustrated, the radio modules are grouped together with the processing base in the same housing 101.
  • the two I / O devices also each include an antenna 102, 102 ′ respectively.
  • the upper device is able to establish a radio link 104 with the network 103 according to a known communication protocol.
  • the device Lower E / R is capable of establishing a radio link 113 with a secondary station or a mobile station.
  • a secondary station may include an I / O device comprising a radio module 122 and an antenna 121 connected together.
  • the I / O device is connected to the processing base 101 of the primary station by a dedicated wired link 131.
  • Such a station can receive a communication from the primary station or transmit a communication to it via the dedicated wired link 131 ; it can also receive (or transmit) a communication from another secondary station or from a mobile station via a radio link.
  • a secondary station can also comprise an upper E / R device and a lower E / R device, each comprising a radio module, the two radio modules being connected to each other, and most often grouped together in the same housing 111.
  • the two E devices / R also each include an antenna 112, 112 '.
  • Such a station can receive a communication from the primary station, from another secondary station or from a mobile station, or transmit a communication to them via a dedicated radio link.
  • a secondary station is thus a relay or a repeater: it receives a communication (or a communications packet) from a station in a given format and retransmits the whole to another station, possibly in another data format according to protocols of known communications. Such a station can only process one communication (or one communication packet) at a time.
  • a primary station is thus distinguished from a secondary station essentially by the fact that it can establish a direct link with the network and that it is able to receive and process several communications packets simultaneously. Its communications processing base allows it to group communications received from several secondary stations simultaneously into a single packet and transmit the packet over the network, or vice versa, receive a communications packet from the network, sort these communications and transmit them simultaneously and separately to the secondary stations and / or to the destination mobile stations.
  • a user with a mobile station 141 connects to the nearest station (primary or secondary) by a radio link 142. This allows him to access the network via the primary station and possibly one or more secondary stations.
  • the mobile station 141 connects equivalently to one or the other of the stations according to its geographical position.
  • the connections between a primary station and a secondary station can be carried out by a hertzian link 113 or a dedicated wired link 131.
  • a hertzian link to ensure a good communication transmission, it is necessary that the device E / R of the transmitting station, and that of the station receiving the communication are almost visible, that is to say that there are no significant physical obstacles between the two.
  • Network coverage is the area on the ground in which good transmission of a communication to the network is ensured.
  • a physical obstacle between two E / R devices will indeed disturb the radio link by deflecting the transmitted waves, by reflecting them, etc., so that they can no longer reach their destination in good conditions.
  • Another problem linked to the urban environment is the number of communications to be transmitted, in a relatively small space. Two communications transmitted simultaneously and geographically close to each other are likely to disturb each other (interference).
  • An object of the invention is to solve the problems of connection between two fixed stations, for example a primary station and a secondary station.
  • Another object of the invention is also to solve the problems of disruption of communications between two stations connected by a radio link, for example two fixed stations or a fixed station and a mobile station.
  • Another object of the invention is to bring the secondary stations closer to ground level, with a view to ensuring better links with the mobile stations which use them.
  • Another object of the invention is also to provide new sites capable of hosting stations of a communications network, in particular secondary stations.
  • the invention relates to a terminal installation for a communication network.
  • Said terminal installation comprises a primary station comprising a transmitting or receiving device (also called I / O device) fixedly installed on a reception site, and a communications processing base capable of being connected to a core. of the radio network.
  • a user with a mobile station can establish radio communication with the transmitting or receiving device to access the core network.
  • the transmitting or receiving device exchanges one or more communications with the processing base.
  • the exchange of communication between the two elements is carried out via an energy network supplying the two elements in electrical energy.
  • the invention thus proposes to make the two elements communicate by links other than radio links or wire links, which obviously eliminates all the drawbacks linked to these links.
  • the primary station may include several E / R devices, each installed in a fixed manner on a reception site and connected to the processing base via the energy network. It is then possible to obtain maximum coverage for the primary station by geographically distributing the E / R devices adequately.
  • the connection between the processing base and an I / O device is established via a energy network already used to supply the two elements of the network.
  • This energy network is preferably a low voltage energy network.
  • Such a network has the advantage on the one hand of providing sufficient energy for the correct functioning of the station, and on the other hand of being particularly dense, especially in urban areas.
  • the invention it is also possible to physically space the communication processing base and the I / O device (s) of the same station. Indeed, it is no longer necessary that the two elements of the station are close to each other to exchange a communication, it is enough that they are connected to the energy network, which we know is relatively dense .
  • the communications processing base can thus be located in an open site, as in the past, or a closed site, such as a technical room of a building.
  • the processing base is more or less close to the E / R device, the main thing being to have a connection to the energy network.
  • the E / R device can be installed on an open reception site.
  • the E / R device of the station is installed as in the past on an open reception site, such as for example a roof or a building terrace.
  • the E / R device can also be brought closer to users equipped with mobile stations.
  • the E / R device is installed in a fixed manner on an open site such as an element of urban furniture connected to the energy network, or else in an enclosed site supplied with energy, such as for example at inside a building, a tunnel, a natural cavity any.
  • Said E / R device is preferably in this case fixed at a height of 5 to 10 m and the power of the device is limited, of the order of 0.5 to 5 W, and even less than 1 W in transmission, so that the surrounding environment is not disturbed.
  • the communications processing base is then preferably located in an enclosed site such as a technical room of a building, or in an open site such, for example in the vicinity of the foot of the element of urban furniture, on a roof. or on a building terrace.
  • the main thing is to have a connection to the energy network, preferably close to the reception site.
  • the two elements can be connected to the same energy network.
  • the two elements can also be connected to two different interconnected energy networks.
  • the street furniture element is connected to the public lighting network and the communications processing base is connected to the energy network supplying the building in which it is located, these two energy networks being interconnected.
  • the E / R device comprises, as well as a known E / R device, an E / R antenna and an associated radio module, capable of modulating or demodulating digital signals on a carrier radio signal.
  • the E / R device is supplemented according to the invention by a modulator, connected between the radio module and the energy network. The modulator is able to modulate or demodulate digital signals on a carrier energy signal.
  • the communications processing base is a known base supplemented by a modulator connected between the base and the energy network, capable of modulating or demodulating digital signals on an energy signal.
  • the terminal installation according to the invention can also include a secondary station (or repeater) in addition to the primary station.
  • the two stations preferably exchange a communication via the energy network. By exchange, we must understand the transmission of a communication from one of the stations to the other of the stations.
  • the primary station and the secondary station are two fixed and terrestrial stations of the radiocommunication network; these are, for example, two stations in the urban part of a network.
  • the two stations are not connected by a dedicated wired link, the installation costs are reduced and the distance between the two stations can be increased.
  • the two stations are also not connected by a radio link, so they do not necessarily have to be within sight of one another. For all these reasons, it is easier to find and choose host sites for these stations.
  • the secondary station is for example a relay or repeater; it includes, like a known equivalent station, an I / O device for communicating with a mobile base. Like the primary station, the secondary station, or at least its I / O device can be brought closer to the end user with a mobile station. This is particularly interesting in urban areas as we have seen previously.
  • the secondary station is thus advantageously fixed to an element of street furniture, preferably at a height of 5 to 10 m.
  • the secondary station is completed by a modulator connected between the E / R device and a branch of the energy network supplying the element of urban furniture.
  • An E / R device used in the invention for producing a primary station or a secondary station essentially comprises a modulator, an antenna and a radio module capable of modulating or demodulating digital data on a radiofrequency carrier signal, the modulated signal being transmitted or received by the antenna.
  • the modulator it is able to modulate or demodulate digital signals on a carrier energy signal.
  • Such an I / O device if it is of low power, is also of small size and light weight.
  • the antenna is thus for example an omnidirectional or unidirectional antenna, of the order of 5 to 10 cm in height and the radio module can for example be housed in a substantially parallelepipedic housing 5 to 10 cm on a side. It is understood that with such dimensions, the E / R device can be easily fixed to an element of street furniture.
  • the E / R power of the E / R device is low, of the same order of magnitude as the power of a mobile station with which it communicates, that is to say of the order of 1 W.
  • the transmission distance of such an E / R device is necessarily limited in space so that a transmitting station does not disturb its environment, and in particular a neighboring station or a user.
  • the number of secondary stations according to the invention can be easily multiplied: the number of sites capable of accommodating such a station is significant, particularly in urban areas, and the cost of a station according to the invention is low because of its reduced power.
  • the invention also relates to an element of street furniture used to accommodate a I / O device of a terminal installation of a radiocommunication network, as described above.
  • the street furniture element is preferably connected to the energy network, or capable of being easily connected.
  • the invention is particularly interesting for communication networks where a single frequency is used, in transmission and / or in reception, in communications between the mobile stations and the network.
  • any primary station or any secondary station (and all neighboring stations) transmit all communications on the same frequency, each communication being preceded by an access code specific to the destination station (mobile or fixed) of communication.
  • Each station of such a network is capable of detecting its own access code on a radio frequency signal transmitted by another station, and is therefore capable of recognizing the communication intended for it in a set of broadcast communications.
  • Such a network is for example according to the UMTS standard.
  • An advantage of such a network is that communication between a transmitting station and a mobile station cannot be disturbed by a communication taking place simultaneously between the same transmitting station and another station or between another nearby transmitting station and a other receiving station.
  • Such a communication network thus easily accepts a multiplication of the number of low power transmission stations insofar as these stations do not interfere with each other.
  • the invention is therefore particularly advantageous in the case of a network using a single frequency or a system called "duplex frequency", that is to say where two frequencies are used, one in transmission and one in reception, and in which several users access the network by the same frequency duplex.
  • duplex frequency a single frequency or a system called "duplex frequency”
  • one or more primary or secondary stations each have a multiplicity of transmission or reception devices intended for mobile stations or other secondary stations, the E / R devices preferably being low power, in relatively large quantities and placed close to users of mobile stations.
  • - Figure 1 is a diagram showing the essential elements of a known radiocommunication network
  • - Figure 2 is a diagram showing the essential elements of a network according to the invention.
  • Figure 2 differs from Figure 1 in the following points. Secondary stations 111, 112; 121, 122 have been deleted, as have their links 113, 131 with the primary station 101, 102. Furthermore, the primary station 101, 102 has been modified and new secondary stations 150 to 157 have been added.
  • the primary station here comprises, as well as a known primary station, a base for processing communications, an E / R device, comprising a radio module and an E / R antenna 102. All these elements have the same function as those corresponding to a known primary station, and in particular make it possible to establish the radio link 104 between the network and the processing base.
  • the primary station also includes a modulator, grouped with the communications processing base and the radio module of the I / O device in a housing 101.
  • the modulator is connected between the communications processing base and the power network supplying said base. .
  • the modulator is able to modulate (or demodulate) digital signals on an energy signal, and to transmit to (or receive from) the energy network to which it is connected a modulated energy signal.
  • a secondary station such as stations 150 to 157 comprises an I / O device comprising an antenna 160 connected to a radio module, and an energy signal modulator connected between the radio module and the energy network.
  • the radio module and the modulator are grouped in a box 161.
  • the radio module is placed in the box 161 and the modulator is deported to a site 162 and connected to the radio module of the box 161 by a dedicated wire link.
  • Site 162 is in the example illustrated a closed site such as a technical room of a nearby building; site 162 could also be an open site such as the roof of said building or any other site.
  • the elements 160, 161 of the station that is to say its antenna, its radio module and possibly its modulator, are fixed to an element of urban furniture, of the lamppost type, traffic lights or advertising panel, preferably connected directly to the energy network. Elements 160, 161 could also be installed inside a building, a tunnel, etc.
  • a station such as stations 150 to 157 is of very low power and therefore of very small footprint. Typically, its transmit power is close to that of a mobile station, on the order of 0.1 to
  • Its antenna is in the example illustrated an omnidirectional antenna, 5 to 10 cm high.
  • its radio module and possibly its modulator are grouped in a box 161, for example of substantially parallelepiped shape of a few cents per side.
  • the secondary station communicates with a mobile station via its I / O device. It also communicates with the primary station via the energy network.
  • the secondary stations 111, 112; 121, 122 have been deleted, and replaced by secondary stations according to the invention. It is obvious that in practice, these previously installed secondary stations can be kept, the secondary stations according to the invention in this case simply supplement and densify the existing communications network.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to a terminal installation for a communication network. The installation comprises a primary station consisting of a transmitting and receiving device which is installed in fixed manner on a host site and a communication treatment base which can be connected to the core of the communication network. The transmitting or receiving device exchanges one or several communications with the communication treatment base. According to the invention, the exchange of communication between the transmitting or receiving device and the communication treatment base is carried out via a power network supplying them with electric energy. The transmitting or receiving device can be remote from the communication treatment base and can, for example, be installed on a site such as an urban decor element.

Description

INSTALLATION POUR RESEAU DE RADIOCOMMUNICATION RADIOCOMMUNICATION NETWORK INSTALLATION
L'invention concerne une installation terminale pour un réseau de radiocommunication. L'installation est notamment intéressante pour un réseau de radio communication en milieu dense, tel qu'un milieu urbain. Elle peut être par exemple utilisée pour la mise en oeuvre d'un réseau de type WCDMA (en anglais : Wideband Code Division Multiple Access) , par exemple UMTS (Universai Mobile Télécommunications System) ou d'un réseau d'un autre type. Une installation terminale connue (figure 1) pour un réseau de radiocommunication comprend généralement une station primaire (encore appelée station de base ou node_B dans un réseau UMTS) , et éventuellement une ou plusieurs stations secondaires (ou répéteurs) . Un utilisateur du réseau disposant d'une station mobile 141, telle qu'un téléphone mobile, se connecte à une station primaire ou secondaire par une liaison hertzienne 142 pour accéder au réseau, c'est-à-dire pour émettre ou recevoir une communication du réseau. Plusieurs utilisateurs peuvent se connecter simultanément sur une même station primaire (ou station de base) .The invention relates to a terminal installation for a radiocommunication network. The installation is particularly interesting for a radio communication network in a dense environment, such as an urban environment. It can for example be used for the implementation of a network of WCDMA type (in English: Wideband Code Division Multiple Access), for example UMTS (Universai Mobile Telecommunications System) or of a network of another type. A known terminal installation (FIG. 1) for a radiocommunication network generally comprises a primary station (also called base station or node_B in a UMTS network), and possibly one or more secondary stations (or repeaters). A user of the network having a mobile station 141, such as a mobile telephone, connects to a primary or secondary station by a radio link 142 to access the network, that is to say to transmit or receive a communication of the network. Several users can connect simultaneously to the same primary station (or base station).
Chaque station primaire ou secondaire est fixée à demeure sur un site d'accueil en hauteur, comme par exemple sur un pylône dédié à cet usage en milieu rural ou bien sur une toiture ou une terrasse de bâtiment en milieu urbain.Each primary or secondary station is permanently fixed to an elevated reception site, such as for example on a pylon dedicated to this use in rural areas or on a roof or a building terrace in urban areas.
Le réseau de radiocommunication lui-même comprend notamment un ensemble d'installations terminales, aptes à se connecter à un cœur de réseau pour échanger des communications, par exemple par l'intermédiaire d'une liaison par faisceaux hertziens, d'une liaison par satellite, d'une liaison dédiée ou par l'intermédiaire de tout autre moyen. Le cœur du réseau de radiocommunication comprend des moyens de gestion du réseau, des moyens d'acheminement et de gestion des communications, des moyens de gestion des abonnés, etc.The radiocommunication network itself comprises in particular a set of terminal installations, able to connect to a core network for exchanging communications, for example by means of a radio-relay link, of a satellite link. , a dedicated link or through any other means. The heart of the radiocommunication network includes network management means, means routing and communication management, subscriber management means, etc.
Le mot communication doit être ici, et dans tout ce qui suit, pris au sens large : une communication est une transmission entre deux stations d'un ensemble de données numériques, relatif par exemple à une communication orale, à des instructions ou des données. Un paquet de communications est alors un ensemble de une ou plusieurs communications effectuées en parallèle. On dira également que deux stations (fixes ou mobiles) échangent une communication lorsque l'une transmet une communication à 1 ' autre.The word communication must be here, and in all that follows, taken in the broad sense: a communication is a transmission between two stations of a set of digital data, relating for example to oral communication, instructions or data. A communications packet is then a set of one or more communications carried out in parallel. It will also be said that two stations (fixed or mobile) exchange a communication when one transmits a communication to the other.
Par ailleurs, par souci de simplification, on utilisera l'expression "dispositif E/R" pour parler d'un dispositif d'émission ou réception, apte à émettre une communication vers un autre dispositif E/R ou à recevoir une communication de ce dernier, par l'intermédiaire d'une liaison hertzienne. Un tel dispositif comprend essentiellement de manière connue un module radio, apte à moduler ou démoduler des données numériques sur un signal radiofréquence porteur et une antenne E/R d'émission ou de réception apte à émettre ou recevoir le signal radiofréquence modulé. La taille est le poids d'un tel dispositif E/R sont directement proportionnels à sa puissance.In addition, for the sake of simplification, the expression "I / O device" will be used to speak of a transmission or reception device capable of transmitting a communication to another I / O device or of receiving a communication from this the latter, via a radio link. Such a device essentially comprises, in a known manner, a radio module, capable of modulating or demodulating digital data on a carrier radiofrequency signal and a transmit / receive E / R antenna capable of transmitting or receiving the modulated radiofrequency signal. The size and weight of such an E / R device are directly proportional to its power.
La station primaire comprend (figure 1) essentiellement une base de traitement de communications, un dispositif E/R supérieur et un dispositif E/R inférieur. Les dispositifs E/R comprennent notamment chacun un module radio; les modules radio sont dans l'exemple illustré regroupés avec la base de traitement dans un même boîtier 101. Les deux dispositifs E/R comprennent également chacun une antenne respectivement 102, 102'. Le dispositif supérieur est apte à établir une liaison hertzienne 104 avec le réseau 103 selon un protocole de communication connu. De même, le dispositif E/R inférieur est apte à établir une liaison hertzienne 113 avec une station secondaire ou une station mobile.The primary station essentially comprises (FIG. 1) a communications processing base, an upper I / O device and a lower I / O device. The E / R devices each include in particular a radio module; in the example illustrated, the radio modules are grouped together with the processing base in the same housing 101. The two I / O devices also each include an antenna 102, 102 ′ respectively. The upper device is able to establish a radio link 104 with the network 103 according to a known communication protocol. Likewise, the device Lower E / R is capable of establishing a radio link 113 with a secondary station or a mobile station.
Une station secondaire peut comprendre un dispositif E/R comprenant un module radio 122 et une antenne 121 connectés ensemble. Le dispositif E/R est relié à la base de traitement 101 de la station primaire par une liaison filaire dédiée 131. Une telle station peut recevoir une communication de la station primaire ou lui transmettre une communication par 1 ' intermédiaire de la liaison filaire dédiée 131 ; elle peut également recevoir (ou transmettre) une communication d'une autre station secondaire ou bien d'une station mobile par l'intermédiaire d'une liaison hertzienne.A secondary station may include an I / O device comprising a radio module 122 and an antenna 121 connected together. The I / O device is connected to the processing base 101 of the primary station by a dedicated wired link 131. Such a station can receive a communication from the primary station or transmit a communication to it via the dedicated wired link 131 ; it can also receive (or transmit) a communication from another secondary station or from a mobile station via a radio link.
Une station secondaire peut également comprendre un dispositif E/R supérieur et un dispositif E/R inférieur, comprenant chacun un module radio, les deux modules radio étant connectés entre eux, et le plus souvent regroupés dans un même boîtier 111. Les deux dispositifs E/R comprennent également chacun une antenne 112, 112'. Une telle station peut recevoir une communication de la station primaire, d'une autre station secondaire ou d'une station mobile, ou leur transmettre une communication par l'intermédiaire d'une liaison hertzienne dédiée.A secondary station can also comprise an upper E / R device and a lower E / R device, each comprising a radio module, the two radio modules being connected to each other, and most often grouped together in the same housing 111. The two E devices / R also each include an antenna 112, 112 '. Such a station can receive a communication from the primary station, from another secondary station or from a mobile station, or transmit a communication to them via a dedicated radio link.
Une station secondaire est ainsi un relais ou un répéteur : elle reçoit d'une station une communication (ou un paquet de communications) sous un format donné et retransmet l'ensemble à une autre station, éventuellement dans un autre format de données selon des protocoles de communication connus . Une telle station ne peut traiter qu'une seule communication (ou un seul paquet de communications) à la fois.A secondary station is thus a relay or a repeater: it receives a communication (or a communications packet) from a station in a given format and retransmits the whole to another station, possibly in another data format according to protocols of known communications. Such a station can only process one communication (or one communication packet) at a time.
Une station primaire se distingue ainsi d'une station secondaire essentiellement par le fait qu'elle peut établir une liaison directe avec le réseau et qu'elle est apte à recevoir et traiter simultanément plusieurs paquets de communications . Sa base de traitement de communications lui permet en effet de grouper en un seul paquet des communications reçues simultanément de plusieurs stations secondaires et de transmettre le paquet sur le réseau, ou inversement, de recevoir un paquet de communications du réseau, de trier ces communications et le les transmettre simultanément et séparément aux stations secondaires et/ou aux stations mobiles destinataires.A primary station is thus distinguished from a secondary station essentially by the fact that it can establish a direct link with the network and that it is able to receive and process several communications packets simultaneously. Its communications processing base allows it to group communications received from several secondary stations simultaneously into a single packet and transmit the packet over the network, or vice versa, receive a communications packet from the network, sort these communications and transmit them simultaneously and separately to the secondary stations and / or to the destination mobile stations.
Pour envoyer une communication sur le réseau, un utilisateur disposant d'une station mobile 141 se connecte à la station (primaire ou secondaire) la plus proche par une liaison hertzienne 142. Ceci lui permet d'accéder au réseau par l'intermédiaire de la station primaire et éventuellement d'une ou plusieurs stations secondaires. La station mobile 141 se connecte de manière équivalente à l'une ou à l'autre des stations selon sa position géographique.To send a communication over the network, a user with a mobile station 141 connects to the nearest station (primary or secondary) by a radio link 142. This allows him to access the network via the primary station and possibly one or more secondary stations. The mobile station 141 connects equivalently to one or the other of the stations according to its geographical position.
Les liaisons entre une station primaire et une station secondaire peuvent être réalisées par une liaison hertzienne 113 ou une liaison filaire dédiée 131. Dans le cas d'une liaison hertzienne, pour assurer une bonne transmission des communications, il est nécessaire que le dispositif E/R de la station qui émet, et celui de la station qui reçoit la communication soient quasiment à vue, c'est-à-dire qu'il n'y ait aucun obstacle physique important entre les deux. La couverture d'un réseau est la zone au sol dans laquelle une bonne transmission d'une communication vers le réseau est assurée. Un obstacle physique entre deux dispositifs E/R va en effet perturber la liaison hertzienne en déviant les ondes émises, en les réfléchissant, etc., de sorte qu'elles ne puissent plus atteindre leur destination dans de bonnes conditions .The connections between a primary station and a secondary station can be carried out by a hertzian link 113 or a dedicated wired link 131. In the case of a hertzian link, to ensure a good communication transmission, it is necessary that the device E / R of the transmitting station, and that of the station receiving the communication are almost visible, that is to say that there are no significant physical obstacles between the two. Network coverage is the area on the ground in which good transmission of a communication to the network is ensured. A physical obstacle between two E / R devices will indeed disturb the radio link by deflecting the transmitted waves, by reflecting them, etc., so that they can no longer reach their destination in good conditions.
Ceci pose un problème sérieux notamment en milieu urbain. Le plus souvent, dans un tel milieu, l'utilisateur muni d'une station mobile se trouve dans la rue, à 1,5 mètres du sol environ. Au contraire, la station primaire ou secondaire avec laquelle il établit une liaison se trouve installée sur une terrasse ou sur un toit d'un bâtiment, à quelques dizaines de mètres de hauteur. De nombreux obstacles sont présents entre les deux : bâtiments, coins de rue, etc. susceptibles de perturber la transmission.This poses a serious problem, especially in urban areas. Most often, in such an environment, the user with a mobile station is on the street, about 1.5 meters from the ground. On the contrary, the primary or secondary station with which it establishes a link is installed on a terrace or on the roof of a building, a few tens of meters high. Many obstacles are present between the two: buildings, street corners, etc. likely to disrupt transmission.
Un autre problème lié au milieu urbain est le nombre de communications à transmettre, dans un espace relativement réduit. Deux communications transmises simultanément et géographiquement proches l'une de l'autre sont susceptibles de se perturber mutuellement (interférences) .Another problem linked to the urban environment is the number of communications to be transmitted, in a relatively small space. Two communications transmitted simultaneously and geographically close to each other are likely to disturb each other (interference).
Par ailleurs, la forte croissance du nombre de stations mobiles, et plus généralement du nombre de communications échangées sur un réseau, entraîne un besoin d'un réseau plus dense, susceptible d'acheminer simultanément ou en parallèle un nombre croissant de communications .Furthermore, the strong growth in the number of mobile stations, and more generally in the number of communications exchanged on a network, leads to a need for a denser network, capable of routing an increasing number of communications simultaneously or in parallel.
Enfin, un nombre croissant d'opérateurs souhaitent exploiter un réseau de radio communication, chacun souhaitant disposer de son propre réseau et donc de ses propres stations .Finally, an increasing number of operators wish to operate a radio communication network, each wishing to have their own network and therefore their own stations.
Pour assurer une couverture maximale, et/ ou pour augmenter le volume de communications transmissibles simultanément, il devient indispensable de densifier le ou les réseaux de radiocommunication, et notamment d'augmenter le nombre de stations au sol, primaires et/ou secondaires. Il devient également indispensable de rapprocher les stations fixes de l'utilisateur, de sorte que ce dernier soit toujours à vue d'une telle station quelle que soit sa position géographique.To ensure maximum coverage, and / or to increase the volume of communications that can be transmitted simultaneously, it becomes essential to densify the radiocommunication network (s), and in particular to increase the number of ground stations, primary and / or secondary. It also becomes essential to bring the fixed stations closer to the user, so that the latter is always in sight of such a station regardless of its geographical position.
Cependant, la densification d'un réseau, notamment en milieu urbain, devient de plus en plus difficile. Le nombre de sites susceptibles d'accueillir des stations fixes est limité. En effet, pour accueillir une telle station, un site doit pouvoir supporter son poids et son encombrement. En particulier, la base de traitement de communications représente une part importante du poids et de l'encombrement de la station. Un site d'accueil doit également être en hauteur pour que la station puisse couvrir une zone la plus grande possible en fonction de sa puissance. De par ces contraintes, le nombre des sites accueil encore disponibles se restreint de manière drastique.However, the densification of a network, especially in urban areas, is becoming increasingly difficult. The number of sites likely to host fixed stations is limited. Indeed, to accommodate such a station, a site must be able to support its weight and its size. In particular, the communications processing base represents a significant part of the weight and of the congestion of the station. A reception site must also be high so that the station can cover the largest possible area according to its power. Due to these constraints, the number of reception sites still available is drastically reduced.
Par ailleurs, pour augmenter le nombre de stations fixes (primaires ou secondaires) , il faut évidemment augmenter le nombre global de liaisons entre ces stations.Furthermore, to increase the number of fixed stations (primary or secondary), it is obviously necessary to increase the overall number of links between these stations.
Augmenter le nombre global de liaisons filaires dédiées, extérieures ou cachées, coûte cher et pose de sérieux problèmes d'infrastructure. Par ailleurs, l'augmentation du nombre de liaisons filaires est très largement limitée par des politiques de gestion de l'environnement strictes.Increasing the overall number of dedicated, external or hidden wired links is expensive and poses serious infrastructure problems. Furthermore, the increase in the number of wired links is very largely limited by strict environmental management policies.
Augmenter le nombre de liaisons hertziennes pose notamment des problèmes de mauvaises transmissions de communications, liées à des obstacles trop nombreux entre deux dispositifs E/R devant échanger une communication, ou liés à des problèmes d'interférence entre deux communications voisines.Increasing the number of radio links poses in particular problems of poor communications transmissions, linked to too many obstacles between two E / R devices having to exchange a communication, or linked to interference problems between two neighboring communications.
Un but de l'invention est de résoudre les problèmes de liaison entre deux stations fixes, par exemple une station primaire et une station secondaire.An object of the invention is to solve the problems of connection between two fixed stations, for example a primary station and a secondary station.
Un autre but de 1 ' invention est encore de résoudre les problèmes de perturbation des communications entre deux stations reliées par une liaison hertzienne, par exemple deux stations fixes ou une station fixe et une station mobile.Another object of the invention is also to solve the problems of disruption of communications between two stations connected by a radio link, for example two fixed stations or a fixed station and a mobile station.
Un autre but de 1 ' invention est de rapprocher les stations secondaires du niveau du sol, en vue d'assurer de meilleures liaisons avec les stations mobiles qui les utilisent.Another object of the invention is to bring the secondary stations closer to ground level, with a view to ensuring better links with the mobile stations which use them.
Un autre but de 1 ' invention est également de fournir de nouveaux sites susceptibles d'accueillir des stations d'un réseau de communications, notamment les stations secondaires .Another object of the invention is also to provide new sites capable of hosting stations of a communications network, in particular secondary stations.
Ainsi, l'invention concerne une installation terminale pour un réseau de communication. La dite installation terminal comprend une station primaire comprenant un dispositif d'émission ou de réception (encore appelé dispositif E/R) installé de manière fixe sur un site d'accueil, et une base de traitement de communications apte à être connectée à un cœur du réseau de radiocommunication. Un utilisateur disposant d'une station mobile peut établir une communication par voie hertzienne avec le dispositif d'émission ou de réception pour accéder au cœur de réseau. Dans la station primaire, le dispositisf d'émission ou de réception échange une ou des communications avec la base de traitement.Thus, the invention relates to a terminal installation for a communication network. Said terminal installation comprises a primary station comprising a transmitting or receiving device (also called I / O device) fixedly installed on a reception site, and a communications processing base capable of being connected to a core. of the radio network. A user with a mobile station can establish radio communication with the transmitting or receiving device to access the core network. In the primary station, the transmitting or receiving device exchanges one or more communications with the processing base.
Selon l'invention, l'échange de communication entre les deux éléments (le dispositif d'émission ou de réception et la base de traitement de communication de la station primaire) est effectué par l'intermédiaire d'un réseau d'énergie alimentant les deux éléments en énergie électrique.According to the invention, the exchange of communication between the two elements (the transmission or reception device and the communication processing base of the primary station) is carried out via an energy network supplying the two elements in electrical energy.
L'invention propose ainsi de faire communiquer les deux éléments par des liaisons autres que des liaisons hertziennes ou des liaisons filaires, ce qui supprime évidemment tous les inconvénients liés à ces liaisons.The invention thus proposes to make the two elements communicate by links other than radio links or wire links, which obviously eliminates all the drawbacks linked to these links.
Ceci a notamment pour conséquence immédiate une réduction importante des coûts d'installation du réseau.In particular, this has the immediate consequence of a significant reduction in network installation costs.
Par ailleurs, la station primaire peut comprendre plusieurs dispositifs E/R, chacun installé de manière fixe sur un site d'accueil et connecté à la base de traitement par l'intermédiaire du réseau énergétique. Il est alors possible d'obtenir une couverture maximale pour la station primaire en répartissant géographiquement les dispositifs E/R de manière adéquate.Furthermore, the primary station may include several E / R devices, each installed in a fixed manner on a reception site and connected to the processing base via the energy network. It is then possible to obtain maximum coverage for the primary station by geographically distributing the E / R devices adequately.
La liaison entre la base de traitement et un dispositif E/R est établie par l'intermédiaire d'un réseau énergétique déjà utilisé pour alimenter les deux éléments du réseau. Ce réseau d'énergie est de préférence un réseau d'énergie basse tension. Un tel réseau présente l'avantage d'une part de fournir une énergie suffisante pour le fonctionnement correct de la station, et d'autre part d'être particulièrement dense, notamment en milieu urbain.The connection between the processing base and an I / O device is established via a energy network already used to supply the two elements of the network. This energy network is preferably a low voltage energy network. Such a network has the advantage on the one hand of providing sufficient energy for the correct functioning of the station, and on the other hand of being particularly dense, especially in urban areas.
Avec l'invention, il est également possible d'espacer physiquement la base de traitement de communication et le ou les dispositifs E/R d'une même station. En effet, il n'est plus nécessaire que les deux éléments de la station soient proches l'un de l'autre pour échanger une communication, il suffit qu'ils soient raccordés au réseau d'énergie, qui on le sait est relativement dense.With the invention, it is also possible to physically space the communication processing base and the I / O device (s) of the same station. Indeed, it is no longer necessary that the two elements of the station are close to each other to exchange a communication, it is enough that they are connected to the energy network, which we know is relatively dense .
Il devient alors possible d'éloigner la base de traitement par rapport au(x) dispositif (s) E/R, ce qui permet de résoudre les problèmes liés à l'encombrement et au poids de la base de traitement notamment. La base de traitement de communications peut ainsi être située dans un site ouvert, comme par le passé, ou un site fermé, tel qu'un local technique d'un bâtiment. La base de traitement est plus ou moins proche du dispositif E/R, l'essentiel étant de disposer d'une connexion au réseau d'énergie.It then becomes possible to move the processing base away from the E / R device (s), which makes it possible to solve the problems linked to the size and weight of the processing base in particular. The communications processing base can thus be located in an open site, as in the past, or a closed site, such as a technical room of a building. The processing base is more or less close to the E / R device, the main thing being to have a connection to the energy network.
Le dispositif E/R peut être installé sur un site d'accueil ouvert. Ainsi, selon une variante, le dispositif E/R de la station est installé comme par le passé sur un site d'accueil ouvert, tel que par exemple un toit ou une terrasse de bâtiment.The E / R device can be installed on an open reception site. Thus, according to a variant, the E / R device of the station is installed as in the past on an open reception site, such as for example a roof or a building terrace.
Le dispositif E/R peut également être rapproché des utilisateurs munis de stations mobiles. Ainsi, selon une autre variante, le dispositif E/R est installé de manière fixe sur un site ouvert tel qu'un élément de mobilier urbain relié au réseau d'énergie, ou bien dans un site clos alimenté en énergie, comme par exemple à l'intérieur d'un bâtiment, d'un tunnel, d'une cavité naturelle quelconque. Ledit dispositif E/R est de préférence dans ce cas fixé à une hauteur de 5 à 10 m et la puissance du dispositif est limitée, de l'ordre de 0.5 à 5 W, et même inférieure à 1 W en émission, de sorte que l'environnement proche ne soit pas perturbé. La base de traitement de communications est alors située de préférence dans un site clos tel qu'un local technique d'un bâtiment, ou dans un site ouvert tel, par exemple au voisinage du pied de l'élément de mobilier urbain, sur un toit ou sur une terrasse d'un bâtiment. L'essentiel est de disposer d'une connexion au réseau d'énergie, de préférence proche du site d'accueil.The E / R device can also be brought closer to users equipped with mobile stations. Thus, according to another variant, the E / R device is installed in a fixed manner on an open site such as an element of urban furniture connected to the energy network, or else in an enclosed site supplied with energy, such as for example at inside a building, a tunnel, a natural cavity any. Said E / R device is preferably in this case fixed at a height of 5 to 10 m and the power of the device is limited, of the order of 0.5 to 5 W, and even less than 1 W in transmission, so that the surrounding environment is not disturbed. The communications processing base is then preferably located in an enclosed site such as a technical room of a building, or in an open site such, for example in the vicinity of the foot of the element of urban furniture, on a roof. or on a building terrace. The main thing is to have a connection to the energy network, preferably close to the reception site.
Les deux éléments (base de traitement et dispositif E/R de la station primaire) peuvent être connectés au même réseau d'énergie. Les deux éléments peuvent aussi être connectés à deux réseaux d'énergie différents interconnectés. Dans un exemple, l'élément de mobilier urbain est connecté au réseau d'éclairage public et la base de traitement de communications est connectée au réseau d'énergie alimentant le bâtiment dans lequel elle est situé, ces deux réseaux d'énergie étant interconnectés .The two elements (processing base and I / O device of the primary station) can be connected to the same energy network. The two elements can also be connected to two different interconnected energy networks. In one example, the street furniture element is connected to the public lighting network and the communications processing base is connected to the energy network supplying the building in which it is located, these two energy networks being interconnected.
Dans tous les cas, la distance physique entre la base de traitement et le dispositif d'E/R de la station n'a plus d'importance puisque les deux communiquent ensemble par l'intermédiaire du réseau d'énergie.In all cases, the physical distance between the processing base and the station's I / O device no longer matters since the two communicate together via the energy network.
Dans un mode de réalisation particulier, le dispositif E/R comprend, de même qu'un dispositif E/R connu, une antenne E/R et un module radio associé, apte à moduler ou démoduler des signaux numériques sur un signal hertzien porteur. Le dispositif E/R est complété selon l'invention par un modulateur, connecté entre le module radio et le réseau d'énergie. Le modulateur est apte à moduler ou démoduler des signaux numériques sur un signal énergétique porteur.In a particular embodiment, the E / R device comprises, as well as a known E / R device, an E / R antenna and an associated radio module, capable of modulating or demodulating digital signals on a carrier radio signal. The E / R device is supplemented according to the invention by a modulator, connected between the radio module and the energy network. The modulator is able to modulate or demodulate digital signals on a carrier energy signal.
La base de traitement de communications est une base connue complétée par un modulateur connecté entre la base et le réseau d'énergie, apte à moduler ou démoduler des signaux numériques sur un signal énergétique.The communications processing base is a known base supplemented by a modulator connected between the base and the energy network, capable of modulating or demodulating digital signals on an energy signal.
L'installation terminale selon l'invention peut également comprendre une station secondaire (ou répéteur) en complément de la station primaire. Les deux stations échangent de préférence une communication par l'intermédiaire du réseau d'énergie. Par échange, il faut comprendre la transmission d'une communication d'une des stations à l'autre des stations.The terminal installation according to the invention can also include a secondary station (or repeater) in addition to the primary station. The two stations preferably exchange a communication via the energy network. By exchange, we must understand the transmission of a communication from one of the stations to the other of the stations.
La station primaire et la station secondaire sont deux stations fixes et terrestres du réseau de radiocommunication; ce sont par exemple deux stations de la partie urbaine d'un réseau. Avec l'invention, les deux stations ne sont pas reliées par une liaison filaire dédiée, les coûts d'installation sont réduits et la distance entre les deux stations peut être augmentée. Les deux stations ne sont pas non plus reliées par une liaison hertzienne, elles ne doivent donc pas nécessairement être à vue l'une de l'autre. Pour toutes ces raisons, il est plus facile de trouver et de choisir des sites d'accueil pour ces stations.The primary station and the secondary station are two fixed and terrestrial stations of the radiocommunication network; these are, for example, two stations in the urban part of a network. With the invention, the two stations are not connected by a dedicated wired link, the installation costs are reduced and the distance between the two stations can be increased. The two stations are also not connected by a radio link, so they do not necessarily have to be within sight of one another. For all these reasons, it is easier to find and choose host sites for these stations.
La station secondaire est par exemple un relais ou répéteur ; elle comprend, de même qu'une station équivalente connue, un dispositif E/R pour communiquer avec une base mobile. De même que la station primaire, la station secondaire, ou au moins son dispositif E/R peut être rapproché de l'utilisateur final possédant une station mobile. Ceci est notamment intéressant en milieu urbain comme on l'a vu précédemment .The secondary station is for example a relay or repeater; it includes, like a known equivalent station, an I / O device for communicating with a mobile base. Like the primary station, the secondary station, or at least its I / O device can be brought closer to the end user with a mobile station. This is particularly interesting in urban areas as we have seen previously.
La station secondaire est ainsi avantageusement fixée sur un élément de mobilier urbain, de préférence à une hauteur de 5 à 10 m. Selon l'invention, la station secondaire est complétée par un modulateur connecté entre le dispositif E/R et une branche du réseau d'énergie alimentant l'élément de mobilier urbain. Un dispositif E/R utilisé dans l'invention pour la réalisation d'une station primaire ou d'une station secondaire, comprend essentiellement un modulateur, une antenne et un module radio apte à moduler ou démoduler des données numériques sur un signal porteur radiofréquence, le signal modulé étant émis ou reçu par l'antenne. Le modulateur quant à lui est apte à moduler ou démoduler des signaux numériques sur un signal énergétique porteur. Un tel dispositif E/R, s'il est de faible puissance, est également de faible dimension et de faible poids. L'antenne est ainsi par exemple une antenne omnidirectionnelle ou unidirectionnelle, de l'ordre de 5 à 10 cm de hauteur et le module radio peut par exemple être logé dans un boîtier sensiblement parallélépipédique de 5 à 10 cm de côté. On comprend qu'avec de telles dimensions, le dispositif E/R puisse être aisément fixé sur un élément de mobilier urbain.The secondary station is thus advantageously fixed to an element of street furniture, preferably at a height of 5 to 10 m. According to the invention, the secondary station is completed by a modulator connected between the E / R device and a branch of the energy network supplying the element of urban furniture. An E / R device used in the invention for producing a primary station or a secondary station, essentially comprises a modulator, an antenna and a radio module capable of modulating or demodulating digital data on a radiofrequency carrier signal, the modulated signal being transmitted or received by the antenna. As for the modulator, it is able to modulate or demodulate digital signals on a carrier energy signal. Such an I / O device, if it is of low power, is also of small size and light weight. The antenna is thus for example an omnidirectional or unidirectional antenna, of the order of 5 to 10 cm in height and the radio module can for example be housed in a substantially parallelepipedic housing 5 to 10 cm on a side. It is understood that with such dimensions, the E / R device can be easily fixed to an element of street furniture.
De préférence, la puissance E/R du dispositif E/R est faible, du même ordre de grandeur que la puissance d'une station mobile avec laquelle il communique, c'est- à-dire de l'ordre de 1 W. Cette puissance est suffisante pour assurer une bonne communication puisque le dispositif E/R est proche de la station mobile qu'il dessert. Avec une telle puissance, la distance d'émission d'un tel dispositif E/R est nécessairement limitée dans l'espace de sorte qu'une station émettrice ne perturbe pas son environnement, et en particulier une station voisine ou un utilisateur. Par ailleurs, le nombre de stations secondaires selon 1 ' invention peut être facilement multiplié : le nombre de sites susceptibles d'accueillir une telle station est important notamment en milieu urbain, et le coût d'une station selon l'invention est faible du fait de sa puissance réduite.Preferably, the E / R power of the E / R device is low, of the same order of magnitude as the power of a mobile station with which it communicates, that is to say of the order of 1 W. This sufficient power to ensure good communication since the E / R device is close to the mobile station it serves. With such a power, the transmission distance of such an E / R device is necessarily limited in space so that a transmitting station does not disturb its environment, and in particular a neighboring station or a user. Furthermore, the number of secondary stations according to the invention can be easily multiplied: the number of sites capable of accommodating such a station is significant, particularly in urban areas, and the cost of a station according to the invention is low because of its reduced power.
Enfin, l'invention a également pour objet un élément de mobilier urbain utilisé pour accueillir un dispositif E/R d'une installation terminale d'un réseau de radiocommunication, telle que décrite ci-dessus. L'élément de mobilier urbain est de préférence relié au réseau d'énergie, ou susceptible de l'être facilement. On peut citer à titre d'exemple un élément de type lampadaire, panneau publicitaire, panneau ou feux de signalisation.Finally, the invention also relates to an element of street furniture used to accommodate a I / O device of a terminal installation of a radiocommunication network, as described above. The street furniture element is preferably connected to the energy network, or capable of being easily connected. By way of example, mention may be made of an element of the lamppost, advertising panel, sign or signaling light type.
L'invention est notamment intéressante pour des réseaux de communication où une unique fréquence est utilisée, en émission et/ou en réception, dans les communications entre les stations mobiles et le réseau. Dans de tels réseaux, une station primaire ou une station secondaire quelconque (et toutes les stations voisines) émettent toutes les communications sur une même fréquence, chaque communication étant précédée d'un code d'accès spécifique à la station (mobile ou fixe) destinataire de la communication. Chaque station d'un tel réseau est apte à détecter son propre code d'accès sur un signal radiofréquence émis par une autre station, et est donc apte à reconnaître la communication qui lui est destiné dans un ensemble de communications diffusées. Un tel réseau est par exemple selon la norme UMTS.The invention is particularly interesting for communication networks where a single frequency is used, in transmission and / or in reception, in communications between the mobile stations and the network. In such networks, any primary station or any secondary station (and all neighboring stations) transmit all communications on the same frequency, each communication being preceded by an access code specific to the destination station (mobile or fixed) of communication. Each station of such a network is capable of detecting its own access code on a radio frequency signal transmitted by another station, and is therefore capable of recognizing the communication intended for it in a set of broadcast communications. Such a network is for example according to the UMTS standard.
Un avantage d'un tel réseau est qu'une communication entre une station émettrice et une station mobile ne peut pas être perturbée par une communication ayant lieu simultanément entre la même station émettrice et une autre station ou bien entre une autre station émettrice proche et une autre station réceptrice. Un tel réseau de communication accepte ainsi sans difficulté une multiplication du nombre de stations d'émission de faible puissance dans la mesure où ces stations ne se perturbent pas mutuellement.An advantage of such a network is that communication between a transmitting station and a mobile station cannot be disturbed by a communication taking place simultaneously between the same transmitting station and another station or between another nearby transmitting station and a other receiving station. Such a communication network thus easily accepts a multiplication of the number of low power transmission stations insofar as these stations do not interfere with each other.
De la même façon, si deux stations proches émettent la même communication à destination d'une troisième station, alors les deux signaux émis ne se perturbent pas l'un l'autre : la fréquence étant la même, les signaux s'ajoutent et la qualité du signal reçu par la troisième station est ainsi améliorée. L'invention est ainsi particulièrement intéressante dans le cas d'un réseau utilisant une unique fréquence ou un système dit de « fréquence duplex », c'est-à-dire où on utilise deux fréquences, une en émission et une en réception, et dans lequel plusieurs utilisateurs accèdent au réseau par le même duplex de fréquence. Dans ces cas, en effet, une ou plusieurs stations primaires ou secondaires disposent chacune d'une multiplicité de dispositifs d'émission ou de réception à destination des stations mobiles ou d'autres stations secondaires, les dispositifs E/R étant de préférence de faible puissance, en quantité relativement importante et placés proches des utilisateurs de stations mobiles.Similarly, if two nearby stations transmit the same communication to a third station, then the two transmitted signals do not disturb each other: the frequency being the same, the signals are added and the quality of the signal received by the third station is thus improved. The invention is therefore particularly advantageous in the case of a network using a single frequency or a system called "duplex frequency", that is to say where two frequencies are used, one in transmission and one in reception, and in which several users access the network by the same frequency duplex. In these cases, in fact, one or more primary or secondary stations each have a multiplicity of transmission or reception devices intended for mobile stations or other secondary stations, the E / R devices preferably being low power, in relatively large quantities and placed close to users of mobile stations.
L'invention sera mieux comprise et d'autres caractéristiques et avantages apparaîtront à la lecture de la description qui va suivre, d'un exemple de mise en oeuvre d'une installation selon l'invention pour un réseau de radiocommunication. La description est à lire en relation aux dessins annexés dans laquelle :The invention will be better understood and other characteristics and advantages will appear on reading the description which follows, of an exemplary implementation of an installation according to the invention for a radiocommunication network. The description should be read in conjunction with the accompanying drawings in which:
- la figure 1 est un schéma présentant les éléments essentiels d'un réseau de radiocommunication connu, et - la figure 2 est un schéma présentant les éléments essentiels d'un réseau selon l'invention.- Figure 1 is a diagram showing the essential elements of a known radiocommunication network, and - Figure 2 is a diagram showing the essential elements of a network according to the invention.
Les éléments des figures 1 et 2 ayant les mêmes références sont identiques .The elements of Figures 1 and 2 having the same references are identical.
La figure 2 se distingue de la figure 1 par les points suivants. Les stations secondaires 111, 112 ; 121, 122 ont été supprimées, de même que leurs liaisons 113, 131 avec la station primaire 101, 102. Par ailleurs, la station primaire 101, 102 a été modifiée et de nouvelles stations secondaires 150 à 157 ont été ajoutées.Figure 2 differs from Figure 1 in the following points. Secondary stations 111, 112; 121, 122 have been deleted, as have their links 113, 131 with the primary station 101, 102. Furthermore, the primary station 101, 102 has been modified and new secondary stations 150 to 157 have been added.
La station primaire comprend ici, de même qu'une station primaire connue, une base de traitement de communications, un dispositif E/R, comprenant un module radio et une antenne E/R 102. Tous ces éléments ont la même fonction que ceux correspondants d'une station primaire connue, et permettent notamment d'établir la liaison hertzienne 104 entre le réseau et la base de traitement.The primary station here comprises, as well as a known primary station, a base for processing communications, an E / R device, comprising a radio module and an E / R antenna 102. All these elements have the same function as those corresponding to a known primary station, and in particular make it possible to establish the radio link 104 between the network and the processing base.
La station primaire comprend également un modulateur, regroupé avec la base de traitement de communications et le module radio du dispositif E/R dans un boîtier 101. Le modulateur est connecté entre la base de traitement de communications et le réseau d'énergie alimentant ladite base. Le modulateur est apte à moduler (ou démoduler) des signaux numériques sur un signal énergétique, et à transmettre au (ou recevoir du) réseau énergétique auquel il est connecté un signal énergétique modulé.The primary station also includes a modulator, grouped with the communications processing base and the radio module of the I / O device in a housing 101. The modulator is connected between the communications processing base and the power network supplying said base. . The modulator is able to modulate (or demodulate) digital signals on an energy signal, and to transmit to (or receive from) the energy network to which it is connected a modulated energy signal.
Une station secondaire telle que les stations 150 à 157, comprend un dispositif E/R comprenant une antenne 160 connectée à un module radio, et un modulateur de signaux énergétiques connecté entre le module radio et le reseau d' énergie.A secondary station such as stations 150 to 157 comprises an I / O device comprising an antenna 160 connected to a radio module, and an energy signal modulator connected between the radio module and the energy network.
Selon une variante, le module radio et le modulateur sont regroupés dans un boîtier 161. Selon une autre variante, le module radio est placé dans le boîtier 161 et le modulateur est déporté dans un site 162 et relié au module radio du boîtier 161 par une liaison filaire dédiée. Le site 162 est dans l'exemple illustré un site fermé tel qu'un local technique d'un bâtiment proche ; le site 162 pourrait également être un site ouvert tel que le toit dudit bâtiment ou tout autre site. Les éléments 160, 161 de la station, c'est à dire son antenne, son module radio et éventuellement son modulateur, sont fixés sur un élément de mobilier urbain, de type lampadaire, feux de signalisation ou panneau publicitaire, de préférence connecté directement au réseau d'énergie. Les éléments 160, 161 pourraient également être installés à l ' intérieur d' un bâtiment, d ' un tunnel , etc .According to a variant, the radio module and the modulator are grouped in a box 161. According to another variant, the radio module is placed in the box 161 and the modulator is deported to a site 162 and connected to the radio module of the box 161 by a dedicated wire link. Site 162 is in the example illustrated a closed site such as a technical room of a nearby building; site 162 could also be an open site such as the roof of said building or any other site. The elements 160, 161 of the station, that is to say its antenna, its radio module and possibly its modulator, are fixed to an element of urban furniture, of the lamppost type, traffic lights or advertising panel, preferably connected directly to the energy network. Elements 160, 161 could also be installed inside a building, a tunnel, etc.
Une station telle que les stations 150 à 157 est de très faible puissance et donc de très faible encombrement. Typiquement, sa puissance d'émission est proche de celle d'une station mobile, de l'ordre de 0,1 àA station such as stations 150 to 157 is of very low power and therefore of very small footprint. Typically, its transmit power is close to that of a mobile station, on the order of 0.1 to
1 W. Son antenne est dans l'exemple illustré une antenne omnidirectionnelle, de 5 à 10 cm de hauteur. Enfin, son module radio et éventuellement son modulateur sont regroupés dans un boîtier 161, par exemple de forme sensiblement parallélépipédique de quelques centimes de côté.1 W. Its antenna is in the example illustrated an omnidirectional antenna, 5 to 10 cm high. Finally, its radio module and possibly its modulator are grouped in a box 161, for example of substantially parallelepiped shape of a few cents per side.
La station secondaire communique avec une station mobile par l'intermédiaire de son dispositif E/R. Elle communique également avec la station primaire par l'intermédiaire du réseau d'énergie.The secondary station communicates with a mobile station via its I / O device. It also communicates with the primary station via the energy network.
Il est à noter que dans l'exemple de la figure 2, les stations secondaires 111, 112 ; 121, 122 ont été supprimées, et remplacées par des stations secondaires selon l'invention. Il est évident que dans la pratique, ces stations secondaires installées antérieurement peuvent être conservées, les stations secondaires selon 1 ' invention viennent dans ce cas simplement compléter et densifier le réseau de communications existant. It should be noted that in the example of FIG. 2, the secondary stations 111, 112; 121, 122 have been deleted, and replaced by secondary stations according to the invention. It is obvious that in practice, these previously installed secondary stations can be kept, the secondary stations according to the invention in this case simply supplement and densify the existing communications network.

Claims

REVENDICATIONS
1. Installation terminale pour un réseau de radio communication, la dite installation terminale comprenant une station primaire comprenant un dispositif d'émission ou de réception installé de manière fixe sur un site d'accueil, et une base de traitement de communications apte à être connectée à un cœur du réseau de radiocommunication, le dispositif d'émission ou de réception échangeant une communication avec la base de traitement de communications, l'installation étant caractérisée en ce que 1 ' échange de communication entre le dispositif d'émission ou de réception et la base de traitement de communications est effectué par l'intermédiaire d'un réseau d'énergie les alimentant en énergie électrique.1. Terminal installation for a radio communication network, said terminal installation comprising a primary station comprising a transmission or reception device installed in a fixed manner on a reception site, and a communications processing base capable of being connected at a core of the radiocommunication network, the transmitting or receiving device exchanging a communication with the communications processing base, the installation being characterized in that the communication exchange between the transmitting or receiving device and the communications processing base is carried out via an energy network supplying them with electrical energy.
2. Installation selon la revendication 1, dans laquelle la station primaire comprend des dispositifs d'émission ou de réception, chacun installé de manière fixe sur un site d'accueil et connecté au réseau d'énergie.2. Installation according to claim 1, wherein the primary station comprises transmitting or receiving devices, each installed in a fixed manner on a reception site and connected to the energy network.
3. Installation selon l'une des revendications 1 ou 2, caractérisée en ce que le site d'accueil est un site ouvert tel qu'est un élément de mobilier urbain alimenté par le réseau d'énergie, ou bien un site clos tel que l'intérieur d'un bâtiment, d'une cavité naturelle ou d'un tunnel .3. Installation according to one of claims 1 or 2, characterized in that the reception site is an open site such as an element of urban furniture supplied by the energy network, or else an enclosed site such as inside a building, a natural cavity or a tunnel.
4. Installation selon l'une des revendications 1 à 3 , caractérisée en ce que la base de traitement de communications est située dans un site clos tel qu'un local technique d'un bâtiment, ou dans un site ouvert tel que un toit ou une terrasse d'un bâtiment, ou au voisinage du site d'accueil ouvert sur lequel est fixé le dispositif d'émission ou de réception, la base de traitement étant connectée au réseau d'énergie.4. Installation according to one of claims 1 to 3, characterized in that the communications processing base is located in an enclosed site such as a technical room of a building, or in an open site such as a roof or a terrace of a building, or in the vicinity of the open reception site on which the transmitting or receiving device, the processing base being connected to the energy network.
5. Installation selon l'une des revendications 1 à 4, dans laquelle le ou les dispositifs d'émission ou de réception sont de faible puissance d'émission ou de réception.5. Installation according to one of claims 1 to 4, wherein the transmitting or receiving device or devices are of low transmitting or receiving power.
6. Installation selon la revendication 5, dans laquelle le ou les dispositifs d'émission ou de réception ont une puissance d'émission inférieure à 1 Watt.6. Installation according to claim 5, in which the transmitting or receiving device or devices have a transmitting power of less than 1 Watt.
7. Installation selon l'une des revendications 1 à7. Installation according to one of claims 1 to
6, pour un réseau de communication travaillant sur une ou plusieurs fréquences en émission et/ou en réception.6, for a communication network working on one or more frequencies in transmission and / or in reception.
8. Installation selon l'une des revendications 1 à8. Installation according to one of claims 1 to
7 , pour un réseau de radiocommunication de type UMTS ou WCDMA.7, for a UMTS or WCDMA type radio network.
9. Installation selon l'une des revendications 1 à9. Installation according to one of claims 1 to
8, caractérisée en ce qu'elle comprend également une station secondaire pour répéter une communication émise par la station primaire, le dispositif d'émission ou de réception de la station primaire étant apte à échanger une communication avec un dispositif d'émission ou de réception associé de la station secondaire par l'intermédiaire du réseau d'énergie.8, characterized in that it also comprises a secondary station for repeating a communication transmitted by the primary station, the transmission or reception device of the primary station being able to exchange a communication with a transmission or reception device associated with the secondary station via the energy network.
10. Installation selon l'une des revendications 1 à 9, caractérisée en ce que la base de traitement de la station primaire et/ou un ou plusieurs dispositifs d'émission ou de réception de la station primaire et/ou le dispositif d'émission ou de réception de la station secondaire comprennent un modulateur, apte à moduler (ou démoduler) des données numériques sur un signal énergétique, et à transmettre au (ou recevoir du) réseau d'énergie ledit signal modulé.10. Installation according to one of claims 1 to 9, characterized in that the processing base of the primary station and / or one or more transmitting or receiving devices of the primary station and / or the transmitting device or receiving station secondary include a modulator, able to modulate (or demodulate) digital data on a signal energy, and to transmit to (or receive from) the energy network said modulated signal.
11. Installation selon la revendication 9 ou 10, caractérisé en ce que le dispositif d'émission ou de réception de la station secondaire est situé sur un site ouvert, par exemple sur un élément de mobilier urbain, ou bien un site clos tel que l'intérieur d'un bâtiment, d'une cavité naturelle ou d'un tunnel.11. Installation according to claim 9 or 10, characterized in that the transmission or reception device of the secondary station is located on an open site, for example on an element of street furniture, or else an enclosed site such as the inside a building, a natural cavity or a tunnel.
12. Elément de mobilier urbain, par exemple de type lampadaire, panneau publicitaire, panneau ou feux de signalisation, caractérisé en ce qu'il est utilisé pour accueillir un dispositif d'émission ou de réception d'une installation terminale d'un réseau de radiocommunication, réalisée selon l'une des revendications 1 à 11. 12. Element of street furniture, for example of lamppost, advertising panel, sign or traffic lights, characterized in that it is used to accommodate a device for transmitting or receiving a terminal installation of a network of radiocommunication, produced according to one of claims 1 to 11.
EP02753119A 2001-06-28 2002-06-26 Installation for a radiocommunication network Ceased EP1400030A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0108508 2001-06-28
FR0108508A FR2826805B1 (en) 2001-06-28 2001-06-28 INSTALLATION FOR RADIO COMMUNICATION NETWORK
PCT/FR2002/002203 WO2003003609A1 (en) 2001-06-28 2002-06-26 Installation for a radiocommunication network

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EP1400030A1 true EP1400030A1 (en) 2004-03-24

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EP02753119A Ceased EP1400030A1 (en) 2001-06-28 2002-06-26 Installation for a radiocommunication network

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FR (1) FR2826805B1 (en)
WO (1) WO2003003609A1 (en)

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Publication number Priority date Publication date Assignee Title
FR2864359B1 (en) * 2003-12-19 2008-09-26 France Telecom URBAN FURNITURE HAVING TELECOMMUNICATIONS EQUIPMENT

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Publication number Priority date Publication date Assignee Title
IT1297151B1 (en) * 1996-09-04 1999-08-03 Arkes S R L GLOBAL TELECOMMUNICATION, MONITORING AND REMOTE SIGNALING NETWORK.
WO2000040041A1 (en) * 1998-12-24 2000-07-06 Swisscom Mobile Ag Communication system, communication method and corresponding devices
IL149465A0 (en) * 1999-11-11 2002-11-10 Ascom Powerline Comm Ag Communication system, especially for indoors

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Title
See references of WO03003609A1 *

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FR2826805B1 (en) 2008-08-08
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