EP3861645A1 - Methode de transmission sans-fil et dispositif associe - Google Patents
Methode de transmission sans-fil et dispositif associeInfo
- Publication number
- EP3861645A1 EP3861645A1 EP19789596.4A EP19789596A EP3861645A1 EP 3861645 A1 EP3861645 A1 EP 3861645A1 EP 19789596 A EP19789596 A EP 19789596A EP 3861645 A1 EP3861645 A1 EP 3861645A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmission
- usri
- channels
- receivers
- base
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004891 communication Methods 0.000 description 12
- 238000001914 filtration Methods 0.000 description 6
- 239000008186 active pharmaceutical agent Substances 0.000 description 4
- 238000011045 prefiltration Methods 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 230000008685 targeting Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000003936 working memory Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
Definitions
- the invention relates to a digital communication technique using radio transmissions.
- the invention relates more particularly to increasing the spectral transmission efficiency in a multi-antenna data transmission system.
- modulation techniques exist for the implementation of transmission systems by transmission and reception of radioelectric signals.
- spatial modulation techniques have appeared recently where the activation of one or more antennas on transmission, transmitting respectively to one or more antennas of one or more receivers, over a predetermined time interval, code information, in addition to the data that can be carried by the simultaneous use of another type of modulation (transmission of a symbol).
- spatial modulation techniques use the index of transmit and / or receive antennas to transmit information additional to that transmitted by conventional multi-antenna systems.
- Spatial modulations exist for the upward or downward path. They are called respectively spatial modulation at transmission and reception.
- a group of binary information is mapped to a subset of transmission antennas. This subset of antennas will be activated for the duration of the spatial symbol, and the receiver must therefore estimate which transmitting antennas have been activated.
- the same concept is applied to the reception antennas, but in this case the transmitter must target the subset of reception antennas to which the binary information has been mapped.
- a preprocessing technique is used at the transmitter level to target the receiving antennas, such as the Zero forcing technique or the formation of digital or analog channels ("conjugate beanforming" ).
- spatial modulation for up and down spatial transmission is performed between a base station and a connected object device.
- the base station must estimate the channel between each antenna to configure a preprocessing block for the downlink and to also use it in the uplink as an equalizer.
- data transmissions use various protocols including systematic transmission of information useful for identifying the sender of the transmitted data, as well as information useful for identifying the recipient (s) of the data.
- MAC layers are independent of the first layer, called the PHY layer.
- the MAC address (from the acronym meaning "Media Control Access”), sometimes called "physical address" is a unique identifier stored on a hardware device intended to be connected to a data transmission network. Unless it has been modified by a user, a MAC address is deemed to be an identifier unique in the world.
- the so-called “hardware dependent” MAC layer thus constitutes the lower part of the link layer of the OSI model. This layer inserts and processes these MAC addresses within the frames transmitted according to the prior art. These data exchanges reduce spectral efficiency on the one hand, and on the other hand pose security problems because of the possible interception of the exchanged MAC addresses. 3. Statement of the invention.
- the invention makes it possible to improve at least some of the drawbacks of the prior art by proposing a method simple to implement, which exploits the specificity of the physical layer of the spatial modulation to carry out an identification of the links without requiring an exchange.
- MAC addresses in the transmission phases thus, this method proposes to jointly realize the MAC layer and the PHY layer.
- the invention provides a method of transmitting data between at least one transmitter and a plurality of receivers, the method comprising a step of estimating the set of channels available between the transmitter and each of the receivers, and further comprising:
- the invention also relates to a system for wireless transmission of data between at least one transmitter and a plurality of receivers comprising a module suitable for estimating the set of transmission channels available between the transmitter and each of the receivers, the system further comprising:
- the transmission module being adapted to a data transmission devoid of a transmission of any receiver identifier.
- FIG. 1 is a schematic representation of a wireless data transmission system according to a particular and non-limiting embodiment of the invention.
- FIG. 2 is a diagram illustrating the main steps of a wireless transmission method in the system described in Figure 1, and according to a particular and non-limiting embodiment of the invention.
- the modules represented are functional units, which may or may not correspond to physically distinguishable units. For example, these modules or some of them are grouped into a single component. Conversely, according to other embodiments, certain modules are composed of separate physical entities.
- FIG. 1 is a schematic representation of a system SYST for wireless data transmission, by electromagnetic means, according to a particular and nonlimiting embodiment of the invention.
- the electromagnetic communication system SYST comprises a BASE transceiver preferentially operating as a "base station” as well as USR1, USR2 and USR3 transceivers preferentially operating as "connected objects" capable of operating in the system among a plurality of other USRi objects connected to the same station base (such additional objects are not represented in FIG. 1 insofar as they are similar to those already represented.
- the base station can be a modem-router device acting as a gateway for a local area network, in an area, a defined geographical space or even a dwelling, for example, and each of the connected objects USR1, USR2 and USR3 can be a portable device of the computer type, a tablet, a smart watch, a smartphone, a audiovisual receiver or any evolution of these products well known to the general public and widely used by them, these examples are obviously not limiting.
- base station a base (node) of a mesh of a data transmission network comprising a plurality of mobile devices configured to communicate with each other and to communicate with other mobile devices USRi, similar or not, possibly connected to other “base stations” connected to this same mesh base, and more broadly to this same network mesh, directly or indirectly.
- base station as defined here implements the electromagnetic part of a wireless communication system, the mesh being possibly wired. Obviously, such a mesh could also consist of wireless links.
- connected object a mobile device as mentioned above and possibly adapted to communicate with peer devices in the same communication network to which it is connected via a “base station "
- the BASE base station comprises a digital core DS which constitutes the “intelligent” part of this equipment.
- the BASE base station further comprises, connected to the digital core DS, a CTR communication controller (interface) configured to implement modulation / demodulation operations according to the invention.
- a PF pre-filtering system is also included in the BASE base station, in particular for the purpose of carrying out a pre-filtering useful for spatial modulation, for example, during electromagnetic transmissions in downlink mode. It will be noted that in upstream mode this prefiltering would be a Bi channel detector used. It is this pre-filtering (also called pre-coding or digital beamforming) that allows focusing the signals to one or more antennas simultaneously via one or more of the identified channels.
- This pre-filtering is carried out digitally. It is this which allows to realize multi-user systems in MIMO, or even spatial modulations by targeting one or more antennas of a connected object to transport what can be called spatial symbols, alone or in addition to the symbols classic modulation.
- the PF prefilter focuses on one or more antennas of a connected object device (receiver) according to a symbol to be transmitted.
- a digital communication bus DL ensures exchanges between the digital core DS and the controller-interface CTR.
- a second communication bus DE connects the controller to the prefilter PF.
- the base station comprises transmit-receive antennas BSA1, BSA2 and BSA3 useful for transmitting data to or from the connected objects (devices) USR1, USR2 and USR3.
- the connected objects USR1, USR2 and USR3 appear in short here and each only as equipment comprising a transceiver device having n UAn transmit / receive antennas usable both in transmission and in reception according to combinations for which each antenna among the n antennas UAn transmits / receives or does not transmit / receive electromagnetic signals.
- the DS, CTR and PF modules each include a set of devices useful for their own operations, including one or more microcontrollers, non-volatile memory, volatile fast access working memory, clock circuits, a or several power reset and supervision circuits, extension and control ports, etc. All of these circuits, today common to any conventionally integrated and / or on-board electronic device, are not described further here since they do not contribute to the understanding of the invention which consists of an improved transmission method.
- Each of the links between the transmit / receive antenna (s), for example BSA1, BSA2 and BSA3 of the BASE base station and one of the antennas transmission / reception UA1, UA2, UAn of a connected object defines a transmission channel B among the set of available transmission channels Bj of the complete system SYS.
- available transmission channel should be interpreted as a transmission channel configured to be usable at a given time in the complete SYST transmission system described.
- the invention here also includes a step of determining an available transmission channel, this transmission channel is configured to be usable at a given time in the SYST system.
- the transmission method includes a step making it possible to perform the pre-filtering and to construct the correspondence table from this channel information.
- the transmit / receive antennas BSA1, BSA2, BSA3, BSAn operate simultaneously or sequentially.
- the connected object USR1 comprises three transmit / receive antennas UA1, UA2 and UA3 useful for digital transmissions with the BASE base station
- the device USR2 comprises two antennas UA4 and UA5
- the USR3 device includes only one UA6 antenna.
- this embodiment is only an example intended to illustrate a variety of possible configurations for the USRi connected objects present in the SYST communication system.
- the electromagnetic communications between the BASE base station and the connected objects USR1, USR2 and USR3 are therefore operated according to communication channels B1, B2, B3, B4, ... Bj respectively defined by the paths BSA1 -UA1, BSA1 -UA2 and BSA1 -UA3, by way of example, between the transmit / receive antennas.
- the channels Bj are not all shown in Figure FIG.1.
- FIG. 2 is a diagram illustrating the main steps of a wireless transmission method in the SYST system described in FIG. 1, and according to a particular and nonlimiting embodiment of the invention.
- the transmission system of FIG. 1 comprising the BASE base station transceiver equipment and the connected object transceiver equipment USR1, USR2 and USR3 are initialized to be in particular operational in terms of capacity. transmission, reception and detection. That is to say that the set of devices internal to each of the BASE and USR1, USR2 and USR3 equipment is initialized and that the BASE and USR1, USR2, USR3 devices are ready for carrying out the essential steps of the method according to the invention.
- control units of the BASE and USR1, USR2 and USR3 equipment are functional and if necessary execute all the software routines useful for their respective operations.
- the same is true for each of the other possible connected objects USRi capable of being connected to the network thus constituted.
- a determination of a weight of each of the antennas (also commonly called weight or binary weight) assigned to each of the UAn transmit / receive antennas in one of the binary sequences to be transmitted (in transmission or reception) in the case of a object connected to several antennas, and,
- step S1 These operations corresponding to step S1, are carried out during a global phase of estimation and identification of all the channels Bj available between the base station BASE and all of the connected objects USRi accessible in the system. More precisely, during this step S1, the BASE base station broadcasts, during a step of transmitting to all of the devices present, pilot signals interpreted as such by the USRi connected objects and known by them. Each of the connected objects USRi uses the received pilot signal and the pilot signals sent by the BASE base station to estimate its own data transmission channels Bj between the base station and itself. In turn, each of the antennas UA1, UA2, UAn of each connected object then in turn broadcasts pilot signals known from the BASE base station.
- the BASE base station uses the signal received and the pilots sent by the connected object to estimate in turn the different so-called "Uplink" channels between the antennas UA1, UA2, UAn and it.
- the method implements a channel estimation technique called "Backoff". Indeed, following the estimation of the uplink channel, the channel is used in downlink to focus using a pre-filter.
- the BASE base station estimates the different channels and associates them with the corresponding connected object USRi, as well as with a unique hardware identifier corresponding to this connected object, such as its MAC address MACi, for example or an equivalent identifier.
- This phase can be used to estimate all the channels Bj between the BASE base station and the various connected objects USRi.
- An orthogonality between the different connected objects is however necessary to avoid collisions or interference during the phase of transmission of the pilot signals.
- each connected object estimates this by the channels between the base station and itself and defines a random value (by drawing lots). This value will then be used to initialize a time counter specific to the connected object, to then define a time interval to be used to transmit to the BASE base station.
- Each of the connected objects USRi thus broadcasts to the base station at a different instant, which instant follows from the time counter value “drawn” in correspondence.
- the various USRi connected objects each transmit a unique MACi hardware identifier to the BASE base station, such as a MAC address, for example.
- the unique hardware identifier specific to each connected object USRi is not a MAC address in the commonly accepted sense, but any other unique hardware identifier, such as a simple number or a simple alphanumeric string for example, if indeed it really appears uniquely in the SYS network and ideally in the absolute.
- the BASE base station then proceeds, during a S2 calibration step, to the construction and recording of a correspondence table TAB between at least two MACi identifiers or unique equivalent of connected objects USRi (transmitters or receivers ) among the plurality of USRi devices and at least two Bj channels available.
- this also makes it possible to improve the security of the exchanges between the BASE base station and the connected objects USRi. Indeed, in the case of an interception of a signal normally transmitted in the SYST communication system by an external device (such as a spy device, for example), it will not be possible for the latter to identify the recipients of the intercepted signal because the MAC address will not be transmitted as such as given.
- an external device such as a spy device, for example
- This addressing principle without having to transmit a unique identifier (recipient address) in the data, can also be used in the opposite direction, namely from a connected device USRi to the BASE base station, that is to say ie uphill.
- the transmission principle according to the invention can also relate to exchanges between two connected objects USRi or even between two base stations such as the BASE station and a similar device operating in the SYST system.
- the method according to the invention is used in the two directions of transmission of the system seen globally, it can be considered that it is possible to communicate within the system by dispensing with having to transmit unique transmitter identifiers ( s) as well as receiver (s) since each of the devices of the system is capable of containing a correspondence table similar to the correspondence table TAB of the BASE base station and establishing correspondences between unique identifiers (MAC addresses, for example example) and transmission channels Bj, configured after the channel identification and estimation phase.
- the channels Bj each corresponding to directivity parameters of one or more beams, according to a configuration specific to each.
- the implementation of the invention makes it possible to improve the security of the transmissions since a spy device which would be configured to intercept all or part of these could not determine to which device (s) (object connected or base station) they are addressed.
- the pre-filtering aiming to direct the radioelectric emissions in correspondence of the different channels Bj to an antenna receiving UAn, is carried out by usual signal processing operations, well known to those skilled in the art. profession of digital transmissions.
- connected objects can implement and / or use spatial modulation or not.
- the connected object USR3 in FIG. 1 has only one UA6 antenna and therefore does not use spatial modulation.
- the means of electrical supply is carried out by usual signal processing operations, well known to those skilled in the art. profession of digital transmissions.
- connected objects can implement and / or use spatial modulation or not.
- the connected object USR3 in FIG. 1 has only one UA6 antenna and therefore does not use spatial modulation.
- the invention is not limited to the embodiments described but to any method of data transmission between at least one transmitter and a plurality of receivers comprising a step of detecting and estimating the set of channels available between a transmitter and each of the receivers, followed by a step of constructing a correspondence table between at least two unique identifiers of receivers among a plurality of receivers and at least two channels among the available channels, as well as a subsequent step of transmitting data between the transmitter and at least one of the receivers, via at least one of the available channels, the data transmission then being devoid of transmission of any unique receiver identifier.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1801026A FR3086828A1 (fr) | 2018-10-01 | 2018-10-01 | Methode de transmission sans-fil et dispositif associe |
PCT/EP2019/076473 WO2020070075A1 (fr) | 2018-10-01 | 2019-09-30 | Methode de transmission sans-fil et dispositif associe |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3861645A1 true EP3861645A1 (fr) | 2021-08-11 |
Family
ID=65951604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19789596.4A Pending EP3861645A1 (fr) | 2018-10-01 | 2019-09-30 | Methode de transmission sans-fil et dispositif associe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3861645A1 (fr) |
FR (1) | FR3086828A1 (fr) |
WO (1) | WO2020070075A1 (fr) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090109955A1 (en) * | 2007-10-31 | 2009-04-30 | Qualcomm Incorporated | Method and apparatus for improved frame synchronization in a wireless communication network |
KR102258575B1 (ko) * | 2015-03-17 | 2021-05-31 | 삼성전자 주식회사 | 전자 장치 및 이의 빔포밍을 이용한 무선 통신 방법 |
-
2018
- 2018-10-01 FR FR1801026A patent/FR3086828A1/fr active Pending
-
2019
- 2019-09-30 WO PCT/EP2019/076473 patent/WO2020070075A1/fr unknown
- 2019-09-30 EP EP19789596.4A patent/EP3861645A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
FR3086828A1 (fr) | 2020-04-03 |
WO2020070075A1 (fr) | 2020-04-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3432487B1 (fr) | Méthode d'ordonnancement pour voies montante et descendante d'un système de transmission optique | |
EP0854600A1 (fr) | Procédé auto-adaptatif de transmission de données et dispositif de mise en oeuvre | |
FR2943485A1 (fr) | Composant terrestre dans un systeme satellite multifaisceau base sur un multiplexage ofdm et procede de communication correspondant | |
WO2010089277A1 (fr) | Procede d'emission dans un reseau sans fil et procede de reception correspondant | |
EP3504932B1 (fr) | Procédé de contrôle de la charge d'une passerelle de concentration de données pour un réseau de communication sans fil | |
EP3861645A1 (fr) | Methode de transmission sans-fil et dispositif associe | |
FR3039740B1 (fr) | Procede de decouverte d'un noeud d'un reseau ad hoc, procede d'echange de donnees, systeme associe | |
FR2988970A1 (fr) | Routage de donnees dans un reseau de capteurs | |
FR2983668A1 (fr) | Procede de communication dans un reseau ad hoc, station emettrice/receptrice et programme d'ordinateur associes | |
FR3053861B1 (fr) | Procede et systeme de communication pour des modules interconnectes par courants porteurs en ligne | |
EP3675542B1 (fr) | Dispositif et procédé de gestion de l'authentification mutuelle pour la communication directe entre des structures mobiles d'un système de radiocommunication mobile | |
FR3056047A1 (fr) | Technique de modulation spatiale amelioree, dispositifs emetteur et recepteur associes | |
EP3675562A1 (fr) | Procédés de traitement de données, dans un réseau ad hoc de radiocommunication, stations mobiles de radiocommunication et programmes d'ordinateur associés | |
FR3099679A1 (fr) | Procédé, dispositif et système de communication pour véhicule utilisant des radars | |
EP2636254A1 (fr) | Système et procédé de découverte de voisinage pour objets communicants | |
WO2017134403A1 (fr) | Technique de modulation spatiale et dispositif recepteur associe | |
WO2017187026A1 (fr) | Systeme de detection et communication pour dispositifs mobiles. | |
FR3091437A1 (fr) | Scanner radio embarqué dans une structure mobile d’un système de radiocommunications | |
EP3675546A1 (fr) | Scanner radio embarqué dans une structure mobile d'un système de radiocommunications, et procédé d'utilisation du scanner radio | |
EP4207889A1 (fr) | Procede de validation d'un positionnement d'un terminal utilisateur dans un reseau de cellules 5 g | |
FR2902195A1 (fr) | Procede de determination de l'instant d'arrivee d'un signal radioelectrique non impulsionnel et systeme de localisation geographique d'emetteurs de signaux radioelectriques non impulsionnels | |
FR3076421A1 (fr) | Procede d’etablissement d’une cle cryptographique partagee entre un premier et un second terminaux | |
EP0588396B1 (fr) | Système de communication radio mobile TDMA comportant un amplificateur d'émission nécessitant un temps de mise en condition | |
EP0827303B1 (fr) | Synchronisation dans un récepteur AMRF | |
FR3118367A1 (fr) | Décodage collaboratif d’une trame corrompue détectée par plusieurs stations de base avec optimisation de la charge du réseau d’accès |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20210223 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |