WO2019206995A1 - Procédé de fonctionnement d'une unité d'antenne, unité d'antenne et réseau d'antennes - Google Patents

Procédé de fonctionnement d'une unité d'antenne, unité d'antenne et réseau d'antennes Download PDF

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Publication number
WO2019206995A1
WO2019206995A1 PCT/EP2019/060513 EP2019060513W WO2019206995A1 WO 2019206995 A1 WO2019206995 A1 WO 2019206995A1 EP 2019060513 W EP2019060513 W EP 2019060513W WO 2019206995 A1 WO2019206995 A1 WO 2019206995A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
data packet
transmission
unit
network
Prior art date
Application number
PCT/EP2019/060513
Other languages
German (de)
English (en)
Inventor
Thomas Smits
Original Assignee
Continental Automotive Gmbh
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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2019206995A1 publication Critical patent/WO2019206995A1/fr

Links

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
    • 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
    • H04B7/0602—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 antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • 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
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Definitions

  • the invention relates to a method for operating a An antenna unit, the antenna unit and an antenna network having at least two of the antenna units.
  • Car2Car vehicle-to-vehicle communication
  • motor vehicles in different frequency bands which extend in the range of 755 MHz GHz and 5, 925 GHz, can send messages to each other, for example, their own position
  • the vehicles have an antenna which is arranged at an exposed point of the vehicle
  • a connection within the respective vehicle between a transmitting and / or receiving endcut and the antenna is often analog via coaxial cable
  • the distances bridged by the coaxial cables can be very large due to design and design specifications between the power amplifier and the antenna high frequencies such as Be Ispiel in the classic frequency band around 5, 9 GHz for the vehicle-to-vehicle communication very critical.
  • the object on which the invention is based is to provide a method for operating an antenna unit, the antenna unit and an antenna network, in particular for a vehicle, which provides a reliable communication link to external communication devices outside the antenna network, in particular to other vehicles , enable.
  • the invention is characterized according to a first aspect by a method for operating an antenna unit of an antenna network, wherein the antenna network comprises the antenna unit and one or more further antenna units.
  • the antenna unit and the other or the further nen units is assigned a same network address.
  • the antenna unit has at least one antenna and a network interface.
  • the antenna unit receives a first data packet via the network interface of the antenna unit.
  • the first data packet is a data packet which is transmitted to the antenna unit and to at least one of the further antenna units of the antenna network with the same data content.
  • the antenna unit provides a first transmission data packet, which comprises the data contents of the first data packet and the assigned network address, on the basis of a predetermined communication protocol.
  • the first transmission data packet is transmitted via the antenna of the antenna unit.
  • the antenna unit is designed, for example, to transmit and / or receive data via the antenna according to the IEEE 802.11-2012 standard.
  • the antenna unit receives a plurality of first data packets in a time sequence during a communication phase. Since the antenna unit, the respective first data packet on the Receives network interface, the antenna unit, which is arranged for example in or on a motor vehicle, can be arranged at an arbitrary position. A distance between the unit providing the first data packet and the antenna unit may be very large. Due to the digital connection, line losses do not and only very negligibly and do not have to be compensated. This allows a trouble-free connection of the antenna unit to the unit that provides the first data packets.
  • the further or the further antenna units preferably execute the same procedure and send the same first transmission data packet with the same network address.
  • the sending of the first transmission data packets with the same network address allows a "multipath reception" on the reception side, ie at the receiver several first data packets are received, the receiver detects, as with a multipath propagation, only a single first transmission packet More reliable first communication data packets can be detected and discarded
  • the network address is thus an identifier for the antenna network and allows the receiver to receive the first data packets, the more reliable communication link have been sent by a particular antenna network in a short time, to recognize as belonging together and to use the redundancy, for example for error correction.
  • the first data packet or the first data packet Sen is cached in a queue.
  • the first transmission data packet is transmitted via the antenna and via the network Interface synchronization information for the first data packet to the other antenna units to which the first data packet was also sent sent. If the transmission medium is busy, a check is made as to whether synchronization information for the first data packet has been received from another antenna unit of the antenna system. If the synchronization information is received within a predetermined period of time, the first data packet or the first transmission data packet is deleted from the queue. If the synchronization information has not been received within the predetermined time, steps b) and c) are executed again.
  • the synchronization information is sent from one antenna unit to the other active antenna units of the antenna network, if the corresponding antenna unit could send the first transmission data packet to inform the other antenna units that they are not allowed to send the corresponding first transmission data packet.
  • the antenna unit can in particular be an "Enhanced Distributed Coordination Access” (EDCA) from the IEEE
  • EDCA Enhanced Distributed Coordination Access
  • the deletion of the first transmission data packets has the advantage that the transmission of identical data packets, which would no longer recognize a receiver due to an excessive time offset as belonging together, can be prevented. If the receiver receives the same data packets but does not recognize them as belonging together because of too large a time offset, the receiver may identify collision situations and start troubleshooting procedures that result in multiple over-transmission of packets and reduce the performance of the communication link.
  • the antenna unit and the other antenna units try to access the transmission medium and first check whether the transmission medium is free.
  • the antenna unit or one of the other antenna units of the antenna network detects a collision on the transmission medium and suppresses its transmission, and another antenna unit of the antenna network recognizes the transmission medium as free and commences according to the transmission process of each next to stationary first data packet or transmission data packet from the queue.
  • the antenna unit which has detected the transmission medium as busy, would, for example, wait for the predetermined period of time and then begin the transmission process of the first transmission data packet. From the perspective of an outside receiving node, for example, another motor vehicle, the first transmission data packet would be transmitted two or more times.
  • the first data packets which are transmitted with the same data content to the antenna units of the antenna network, have the same data format. This has the advantage that time requirements for the transmission and / or the processing of the first data packets can be maintained more easily.
  • the first data packets received by the antenna unit or the first transmission data packets determined therefrom are stored in the queue in a predetermined order and the first data packets or first transmission packets are sequentially read from the queue for transmitting the first transmission data packets ,
  • the first data packets are queued in the order in which they are received.
  • a change in the order can take place, for example, depending on a predetermined absolute or relative desired transmission time for the respective first data packets or a prioritization of the first data packets.
  • the predetermined period of time is varied for each of the first data packets received by the antenna unit.
  • the predetermined period of time is thus the same for all active An antenna units of the antenna network varies.
  • the variation of the given time period makes it possible to reduce a probability of possible collisions.
  • the predetermined period of time for the first data packets of the antenna unit comprises a random value. A due to vary the predetermined period, the
  • the predetermined amount of time may correspond to a back-off time in which a back-off procedure is normally performed, as provided, for example, in the IEEE 802.11-2012 standard.
  • the transmission of the respective first transmission data packet takes place synchronously or approximately synchronously, within a given tolerance period, to a transmission of one or more corresponding, in particular same, first transmission data packets, each containing the data contents of the same first data packet and the same network address as the first transmission data packet, and those of the other antenna units, which have recognized the intended for transmission of the corresponding first transmission packet transmission medium as free, are sent.
  • the requirements for synchronous transmission here are moderate, in particular lower than for beamforming (in English beamforming).
  • the transmission of the first transmit data packet and the corresponding first transmit data packets need not be phase-accurate ( ⁇ 0.5 ns), but may be in the range of 0.5 ys to 50 ys, in particular in the range of 1 ys to 3 ys.
  • Simultaneous or quasi-simultaneous transmission of the same first transmission data packets by the antenna units of the antenna network enables reception diversity at the packet level on the reception side.
  • the procedure described above may also be referred to as packet transmit diversity, since each antenna unit independently emits a complete packet according to a predetermined communication protocol, for example, according to an IEEE 802.11-2012 standard.
  • a synchronization of the antenna units of the antenna network plant for synchronous transmission of the first transmission data packets is preferably carried out via an inter-module connection, that is, a clock synchronization of the antenna units of the antenna network.
  • clock synchronization systems are known to the person skilled in the art, for example from the field of Ethernet, the BroadR-Reach, Universal Serial Bus and IEEE 802.11 WiFi (Wireless Fidelity) networks.
  • the predetermined period of time for the respective first data packet is set the same for all antenna units. This enables the first transmission data packet and the corresponding first transmission data packets to be transmitted synchronously or approximately synchronously by the antenna unit and the further antenna units. A backoff time can thus be set the same for all antenna units.
  • the antenna unit receives, in conjunction with the first data packet, a time information provided which directly or indirectly specifies at which time the first data packet is intended to be transmitted by the antenna unit.
  • the antenna unit transmits the first transmission data packet having the data content of the first data packet depending on the provided time information.
  • the antenna unit may use the time information to queue the first data packet or the first transmission data packet and / or transmit processes for the first transmission data packets in corresponding ones Time intervals that are determined depending on the time information to start.
  • an identifier is assigned to the first data packet, which is sent to the antenna unit and the further antenna units, for distinguishing further first data packets which were or will be sent sooner or later to the antenna unit and the further antenna units ,
  • the synchronization information comprises an information which is representative of the identifier of a specific first data packet. This allows the antenna unit to easily associate the received synchronization information with the first data packet that is to be actually deleted.
  • the antenna unit adjusts its transmission power depending on a provided position information which is representative of a position of an external unit outside the antenna network.
  • the external unit may be a vehicle to receive the first transmission data packets.
  • the antenna unit has an antenna array and occupies the antenna array with high-frequency signals such that the antenna array has a predetermined directional Abstrahlcharak teroxide.
  • This allows beam forming related to the antenna unit, which can provide additional performance and robustness gains.
  • the radiation characteristic can be optimized specifically for the respective position of the antenna unit.
  • the antenna unit has at least two antennas and the antenna unit selects one of the at least two antennas depending on a received field strength of the respectively received signal at the antennas or superimposes the received one Signals.
  • the antenna unit is thus designed to perform an antenna diversity reception related to the antenna unit, for example a maximum ratio combining (MRC).
  • MRC maximum ratio combining
  • the invention is characterized according to a second aspect by an antenna unit having an antenna and a network interface and is adapted to carry out the method according to the first aspect or an embodiment of the method.
  • the antenna unit forms a network node of the antenna network.
  • the antenna unit has an antenna module which comprises the network interface.
  • the antenna module is electrically coupled to the antenna and spatially disposed immediately adjacent to the antenna.
  • the other antenna units are preferably operated the same as the other antenna units of the antenna network.
  • the antenna modules of the antenna units of the antenna network are the same.
  • the antenna units can be constructed differently, but they are designed to behave the same or approximately the same for the synchronization of the timing, the processing of the queues and the processing, in particular protocol processing, so that the time conditions for Synchronous or quasi-synchronous transmission can be maintained.
  • optional antenna units can be connected to the antenna network, which can be incorporated into the antenna network as required in such a way that they send the first transmission data packets together with the other antenna units.
  • the optional antenna units can only use resources, for example a central processing unit of the antenna network.
  • the invention is characterized according to a third aspect by an antenna network comprising at least two antenna units according to the second aspect and a computing unit, which is configured to send the first data packets to the antenna units.
  • the respective antenna units are further adapted to receive synchronously or approximately synchronously within a second predetermined tolerance period a second transmission data packet via their antenna, which was transmitted by an external unit outside the antenna network, wherein the second transmission data packet has a format according to a first communication protocol and comprises data contents of a second data packet and a transmission address. Furthermore, the respective antenna units are designed to reconstruct the second data packet synchronously or within the second predetermined tolerance period or to assemble a further data packet comprising the data contents and the second or additional data packet in conjunction with the associated transmission address via the network interface to send the arithmetic unit.
  • the arithmetic unit is designed to detect erroneous data packets as a function of the received further or second data packets and to reject redundant second data packets and / or to correct erroneous data packets.
  • the multi-antenna system in which the individual antenna units are separated by digital transmission links, nevertheless can take advantage of MIMO (Multiple In-Multiple Out) transmission, packet-level transmit diversity, and packet-level receive diversity, and optionally combine with antenna diversity and signal shaping.
  • MIMO Multiple In-Multiple Out
  • the antenna units can be positioned at arbitrary, preferably optimal, positions in and / or on a vehicle.
  • the antenna units can be very large distances without the performance of the antenna network is reduced.
  • the antenna units can be networked via standard digital network technologies.
  • the requirements for the "synchronous" transmission of the first transmission packet can be easily met, since no phase-exact synchronization is required.
  • the requirements for "synchronous" reception are low.
  • Robustness and performance can be increased compared to using only one antenna unit.
  • a coverage for sending and receiving can be increased.
  • the antenna units can be modular. Where necessary, adjustments to the individual modules (antenna, network connection, power adaptation, et cetera) can be made. An adaptation of antenna units to new requirements can be done easily.
  • the respective antenna units and the computing unit are arranged in a vehicle and the antenna units are configured to establish via their respective antennas a communication connection to external units outside the vehicle.
  • the antenna network may alternatively be arranged stationary and used to bridge difficult local conditions.
  • 1 shows an embodiment of an antenna network in a vehicle
  • 2a, 2b show exemplary network topologies of an antenna network
  • 3a, 3b are each a block diagram of an embodiment example of an antenna unit
  • FIG. 4 shows an example flow chart for a program for operating the antenna unit
  • Figure 5 is a schematic representation of a distribution of first data packets
  • Figure 6 shows another embodiment of the antenna network plant.
  • FIG. 1 shows by way of example an antenna network 1 which is arranged in a vehicle 9.
  • the antenna network 1 comprises at least two antenna units 3 and a computing unit 11.
  • the computing unit 11 comprises, for example, a control unit of the vehicle 9.
  • the antenna units 3 are respectively arranged at the front and rear of the vehicle 9.
  • the antenna network 1 has a suitable network topology, for example a star topology or bus topology.
  • FIG. 2a shows by way of example an antenna network 1 with a
  • FIG. 2b shows by way of example an antenna network 1 with a bus topology.
  • the antenna units 3 and the arithmetic unit form so-called accounts of the antenna network 1.
  • a data transmission within the antenna network 1 is based for example on an Ethernet protocol or on the BroadR-Reach technology.
  • BroadR-Reach technology is an Ethernet physical layer standard for automotive applications. range that require an Internet connection or other communication connection.
  • a universal serial bus protocol (USB protocol) or another network protocol can be used.
  • the antenna network 1 in particular has a sufficient bandwidth and / or is designed to comply with a predetermined latency.
  • the transmission of the data within the antenna network 1 is preferably conducted.
  • the transmission of data between all or individual nodes may be wireless.
  • FIGS. 3 a and 3 b each show, for example, a block diagram of the antenna unit 3.
  • the antenna unit 3 comprises an antenna 5 and an antenna module 7.
  • the antenna unit 3 is preferably designed as an inte grated unit, in which the antenna 5 and the antenna module 7 spatially adjacent, in particular immediately adjacent to each other, are arranged.
  • the antenna 5 and the antenna module 7 are electrically coupled.
  • FIG. 3b shows a more detailed block diagram.
  • Antenna module 7 comprises an output stage 21, a base band processing unit 19 and a processing unit 17 for processing data according to one or more protocol layers of at least two communication protocols and a network interface 4.
  • the output stage 21 has, for example, an analog Hochfre frequency amplifier and an intermediate frequency stage.
  • the base processing unit 19 includes, for example, an encoder and / or decoder.
  • the output stage 21 may be formed without intermediate frequency stage, so that base band signals are converted directly into high-frequency signals and / or high frequency signals are converted directly into baseband signals.
  • the processing unit 17 is designed, for example, to receive first data packets from the arithmetic unit 11 which are sent by the arithmetic unit 11 in accordance with a first communication protocol.
  • the first communication protocol may be, for example, an Ethernet protocol or a protocol derived therefrom.
  • the processing unit is configured to provide first transmission data packets according to a second communication protocol, which comprise the data contents of the first data packets.
  • the second communication protocol is suitable, for example, for vehicle-to-vehicle communication.
  • the second communication protocol is for example a communication protocol according to the IEEE 802.1 lp standard or alternatively the IEEE802.il Wifi standard, long-term evolution standards or
  • the antenna units 3 are thus designed for packet processing above a physical layer.
  • the antenna 5 is designed, for example, to transmit and receive signals in a predetermined frequency range of 5.9 GHz.
  • the antenna units for example, in a USB module
  • USB Universal Serial Bus
  • FIG. 4 shows an example flow chart for a program for operating one of the antenna units 3.
  • the antenna units 3 of the antenna network 1 are each assigned the same network addresses. This allows the antenna units 3 to send data packets having a same address and a receiver to send these data packets as one Can recognize data packet. Even if the data packets have a time offset, the receiver can interpret this quasi as "multipath reception" and evaluate the received signals accordingly.
  • the program is started in a step S1 as soon as a first data packet, which is sent by the arithmetic unit 11, is applied to the network interface 4 of the antenna unit 3.
  • the first data packet is a data packet which is sent to the antenna unit 3 and at least one of the further antenna units 3 of the antenna network 1 with the same data content.
  • the first data packets sent to the various antenna units 3 have the same data format.
  • step S3 the first data packet is read.
  • a first transmission data packet containing the data contents of the first data packet and the associated data packet
  • Network address provided on the basis of a given communication protocol for communication via the antenna 5.
  • a step S7 the first transmission data packet is buffered in a queue 15.
  • the queue 15 comprises, for example, a memory register and the second transmission data packets are stored in a predetermined order in the queue 15 and the first transmission data packets are read from the queue 15 for transmission of the transmission data packets.
  • the first data packets in the queue 15 can also be buffered.
  • the transmission of the first data packets and buffering of the first data packets is illustrated in FIG.
  • a step S9 it is checked on the basis of a predetermined media access procedure of the predetermined communication protocol whether a transmission medium intended for the transmission of the first transmission data packet is occupied.
  • step Sil If the transmission medium is not busy, in a step Sil, the first transmission data packet is read from the queue 15 and provided for the analog transmission via the antenna 5. Subsequently, the program is continued in a step S13. In step S13, synchronization information for the first data packet is sent to the other antenna units 3 to which the first data packet has also been sent. Subsequently, the program is ended in a step S21.
  • step S15 it is checked whether synchronization information for the first data packet has been received from another antenna unit 3 of the antenna system.
  • the first transmission data packet is deleted from the queue 15 in a step S17, and then the program is ended in a step S21.
  • step S9 The program is executed, for example, for each of the received first data packets.
  • FIG. 6 shows another embodiment of the antenna network 1.
  • the antenna network 1 has in the embodiment shown at least one antenna unit 3, which has more than one antenna 5, for example, two antennas, and the antenna module 7 to a spatial reception diversity and / or to a Transmitting diversity is formed.
  • the analog output stage of the antenna module thus uses several antennas for receiving or transmitting signals. Due to a reception or transmission of the signals via spatially offset antennas of the output stage disturbing interference can be reduced.
  • At least one of the antenna units 3 is designed to emulate a directional emission characteristic or, in other words, to perform antenna beam shaping, in English beamforming.
  • the at least one antenna unit 3 has, for example, an antenna array, and the antenna module 7 is designed to signal the respective antennas of the antenna array with high-frequency signals such that they have a predetermined directional emission characteristic.
  • beamforming During beamforming, several directional antennas mounted close to each other are covered with RF signals in such a way that the antenna arrays emulate a directional radiation characteristic.
  • the radiation characteristics of the array antennas can be changed by mathematical algorithms by changing the signal levels and phase positions. The two parameters allow a complex weighting of the emission form.
  • beamforming allows you to shape the radio signal by using multiple antennas and thus targeting a receiver. Very high data rates and optimized ranges with the least interference are the result.
  • Such an antenna array is switched as a receiving antenna, it can be shaped so that the received signal is amplified and interference is suppressed.
  • At least one antenna unit 3 is configured to adapt a transmission power to a respective position of the external communication partner, for example another motor vehicle outside the antenna network 1, in order to better achieve this external communication partner, without a total permissible emitted transmission power To exceed.
  • the particular vehicle communicates its position with the other vehicles.

Abstract

Le réseau d'antennes comporte une unité d'antenne et une ou plusieurs autres unités d'antenne. Une même adresse de réseau est attribuée à l'unité d'antenne et à la ou aux autres unités d'antenne. Chaque unité d'antenne comprend au moins une antenne et une interface de réseau. Une unité d'antenne reçoit un premier paquet de données par le biais de son interface de réseau. À cet effet, le premier paquet de données est un paquet de données qui est envoyé à l'unité d'antenne et à au moins une des autres unités d'antenne du réseau d'antennes avec le même contenu de données. Par ailleurs, chaque unité d'antenne prépare un premier paquet de données d'émission, qui comporte les contenus de données du premier paquet de données et l'adresse de réseau associée, sur la base d'un protocole de communication prédéfini. Le premier paquet de données d'émission est émis par l'antenne de chaque unité d'antenne.
PCT/EP2019/060513 2018-04-27 2019-04-24 Procédé de fonctionnement d'une unité d'antenne, unité d'antenne et réseau d'antennes WO2019206995A1 (fr)

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DE102018206598.5A DE102018206598B3 (de) 2018-04-27 2018-04-27 Verfahren zum Betreiben einer Antenneneinheit, Antenneneinheit und Antennennetzwerk
DE102018206598.5 2018-04-27

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WO2020245107A1 (fr) * 2019-06-04 2020-12-10 Continental Automotive Gmbh Véhicule à moteur à réseau d'antennes

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DE102007019469B4 (de) 2007-04-25 2019-12-24 Audi Ag Kommunikationssystem für ein Kraftfahrzeug und Verfahren zum Vermitteln von Kommunikationssignalen
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US20020158801A1 (en) * 2001-04-27 2002-10-31 Crilly William J. Wireless packet switched communication systems and networks using adaptively steered antenna arrays
US20140348258A1 (en) * 2002-10-25 2014-11-27 Qualcomm Incorporated Mimo wlan system

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WO2020245107A1 (fr) * 2019-06-04 2020-12-10 Continental Automotive Gmbh Véhicule à moteur à réseau d'antennes

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