EP4483202A1 - Procédé et dispositif de communication de données par sélection d'au moins un radar dans une pluralité de radars d'un véhicule - Google Patents
Procédé et dispositif de communication de données par sélection d'au moins un radar dans une pluralité de radars d'un véhiculeInfo
- Publication number
- EP4483202A1 EP4483202A1 EP23703090.3A EP23703090A EP4483202A1 EP 4483202 A1 EP4483202 A1 EP 4483202A1 EP 23703090 A EP23703090 A EP 23703090A EP 4483202 A1 EP4483202 A1 EP 4483202A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- radar
- communication
- radars
- radar system
- 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
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/003—Transmission of data between radar, sonar or lidar systems and remote stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9316—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles combined with communication equipment with other vehicles or with base stations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9325—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles for inter-vehicle distance regulation, e.g. navigating in platoons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9327—Sensor installation details
- G01S2013/93271—Sensor installation details in the front of the vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9327—Sensor installation details
- G01S2013/93272—Sensor installation details in the back of the vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9327—Sensor installation details
- G01S2013/93274—Sensor installation details on the side of the vehicles
Definitions
- the present invention claims the priority of French application 2201602 filed on 02.23.2022, the content of which (text, drawings and claims) is incorporated herein by reference.
- the present invention relates to communication methods and devices for vehicles, in particular automobiles.
- the present invention also relates to a communication method and device using one or more radars fitted to a vehicle, in particular in the context of communication(s) of the V2X type.
- Contemporary vehicles carry more and more means of communication which often require specific components (antennas, transmitters, receivers), complicating the electronic architecture of the vehicle and increasing its manufacturing cost.
- V2X from the English “Vehicle to Everything” or in French “Véhicule vers tout”.
- ITS G5 from the English “Intelligent Transportation System G5" or in French “Intelligent Transport System G5") in Europe
- DSRC from the English “Dedicated Short Range Communications” or in French “Communications dedicated to short range”
- C-V2X from the English “Cellular - Vehicle to Everything” or in French “Cellulaire - Vehicule vers tout”
- 4G from LTE (from English “Long Term Evolution” or in French “Evolution à long terme”) or 5G.
- V2X communication technologies also use the 5.9 GHz frequency band, which induces a maximum throughput of 6 Mbits/s for data communication. Such a maximum throughput may prove to be insufficient to meet the communication needs of vehicles, particularly in the context of the autonomous vehicle.
- An object of the present invention is to solve at least one of the problems of the technological background described above.
- Another object of the present invention is for example to reduce the diversity of certain components implemented by the means of communication of a vehicle.
- Another object of the present invention is for example to improve communication between vehicles.
- the present invention relates to a communication method for a first vehicle, the first vehicle carrying a millimeter wave radar system comprising at least one radar, the method comprising the following steps:
- V2V vehicle-to-vehicle type communication mode
- vehicle radar(s) to transmit or receive data in a V2V communication mode reduces the number of components required (antenna, transmitter, receiver) for V2X communications using vehicle detection radars rather than dedicated components.
- the frequency band used by radars being between 76 and 81 GHz, the maximum rate allowed for data communication is much higher than that allowed by the frequency band allocated to V2X or V2V communications.
- the selection of one or more radars of the radar system to communicate with one or more other vehicles makes it possible to distribute the communications spatially on the selected radar(s), which makes it possible to have more directional communication beams.
- the at least one event belongs to a set of events comprising:
- the method comprises a step of determining a position of the at least second vehicle relative to the first vehicle, the at least one radar selected corresponding to the radar of the radar system comprising the position in its coverage area for transmission and/or reception of V2V communication signals, each radar of the radar system having a different coverage area.
- the method comprises a step of determining a side of the first vehicle for which the turn signal is activated, the at least one selected radar being positioned on the side of the first vehicle.
- the present invention relates to a communication device for a vehicle on board a millimeter wave radar system comprising at least one radar, the device comprising a memory associated with a processor configured for the implementation of the steps of the method according to the first aspect of the present invention.
- the present invention relates to a vehicle communication system comprising the device as described above according to the second aspect of the present invention and a system of millimeter wave object detection radars comprising a plurality of radars spatially arranged on the vehicle and connected to the device as described above according to the second aspect of the present invention.
- the present invention relates to a computer program which comprises instructions adapted for the execution of the steps of the method according to the first aspect of the present invention, this in particular when the computer program is executed by at least one processor.
- the present invention relates to a computer-readable recording medium on which a computer program is recorded. comprising instructions for carrying out the steps of the method according to the first aspect of the present invention.
- the recording medium can be any entity or device capable of storing the program.
- the medium may comprise a storage means, such as a ROM memory, a CD-ROM or a ROM memory of the microelectronic circuit type, or even a magnetic recording means or a hard disk.
- this recording medium can also be a transmissible medium such as an electrical or optical signal, such a signal being able to be conveyed via an electrical or optical cable, by conventional or hertzian radio or by self-directed laser beam or by other ways.
- the computer program according to the present invention can in particular be downloaded from an Internet-type network.
- the recording medium may be an integrated circuit in which the computer program is incorporated, the integrated circuit being adapted to execute or to be used in the execution of the method in question.
- FIG. 1 schematically illustrates a communication environment for vehicles, according to a particular and non-limiting embodiment of the present invention
- FIG. 2 schematically illustrates a communication device for a first vehicle of FIG. 1, according to a particular and non-limiting embodiment of the present invention
- FIG. 3 schematically illustrates a communication system for a first vehicle of FIG. 1 and comprising the device of FIG. 2, according to a particular and non-limiting embodiment of the present invention
- FIG. 4 illustrates a flowchart of the different steps of a communication method for a first vehicle of FIG. 1, according to a particular and non-limiting embodiment of the present invention.
- a method and a communication device for a vehicle on board a radar system comprising at least one radar will now be described in the following with reference jointly to FIGS. 1 to 4.
- the same elements are identified with the same reference signs while throughout the following description.
- a communication method implemented by a first vehicle carrying a millimeter wave radar system comprising one or more radars comprises the detection of at least one event associated with a circulation of the first vehicle in a road environment.
- Such an event corresponds for example to the activation of one or more indicators of the first vehicle, for example to indicate a lane change, and/or to the detection of one or more second vehicles also traveling in the road environment (the detection being obtained from the radar system).
- One or more radars of the first vehicle's radar system are selected based on the detected traffic event or events.
- the first vehicle then initiates the transmission of data to one or more second vehicles in its environment using the selected radar(s).
- the data is advantageously transmitted according to a vehicle-to-vehicle type communication mode, called V2V (from the English “Vehicle-to-Vehicle”).
- the use of the vehicle's radar(s) to transmit or receive data in a V2V communication mode makes it possible to reduce the number of components required (antenna, transmitter, receiver) for V2X communications by using the vehicle's detection radars rather as dedicated components.
- the frequency band used by radars being between 76 and 81 GHz, the maximum bit rate allowed for data communication is much higher than that allowed by the frequency band allocated to V2X or V2V communications.
- the selection of one or more radars of the radar system to communicate with one or more other vehicles makes it possible to distribute the communications spatially on the selected radar(s), which makes it possible to have more directional communication beams.
- FIG. 1 schematically illustrates a communication environment 1 between vehicles, according to a particular and non-limiting embodiment of the present invention.
- FIG. 1 illustrates an environment 1 comprising one or more roads and/or traffic lanes on which a first vehicle 10 and one or more second vehicles 11, 12, 13 travel.
- the second vehicle 11 for example precedes the first vehicle 10 on the traffic lane of the first vehicle 10.
- the second vehicle 1 travels on another traffic lane adjacent to that of the first vehicle 10, this adjacent lane being to the left of the traffic lane of the first vehicle 10 according to the direction of travel of the first vehicle 10.
- the second vehicle 13 travels on a traffic lane adjacent to that of the first vehicle 10, this adjacent lane being to the right of the traffic lane of the first vehicle 10 according to the direction of travel of the first vehicle.
- the first vehicle 10 and at least part of the second vehicles 11 to 13 are advantageously configured to communicate using a so-called V2X communication mode, for example based on the 3GPP LTE-V or IEEE 802.11 p standards of ITS G5.
- V2X communication mode for example based on the 3GPP LTE-V or IEEE 802.11 p standards of ITS G5.
- each vehicle embeds a node to enable vehicle-to-vehicle V2V communication, vehicle-to-V2I infrastructure communication -infrastructure”) and/or vehicle-to-pedestrian V2P (from the English “vehicle-to- pedestrian”), the pedestrians being equipped with mobile devices (for example a smart phone (“Smartphone”)) configured to communicate with the vehicles.
- mobile devices for example a smart phone (“Smartphone”)
- the first vehicle 10 and one or more second vehicles 11 to 13 are in particular configured to communicate or exchange data according to one or more wireless links based on V2V technology.
- the first vehicle 10 is advantageously equipped with a millimeter wave radar system.
- the system comprises one or more radars, for example 4, 6, 8, 10 radars distributed over the first vehicle 10 to detect objects in the environment around the first vehicle 10.
- Each radar is adapted to emit electromagnetic waves and to receive the echoes of these waves returned by one or more objects, with the aim of detecting obstacles and their distances vis-à-vis the first vehicle 10 for example.
- Each radar, or at least a part of the plurality of radars is also suitable for transmitting and receiving electromagnetic waves to communicate with another entity, for example one or more second vehicles 11 to 16.
- a radar capable of both detecting objects and allowing radio communication with another entity is for example described in the document WO201 2/037680 A1, published on March 29, 2012.
- Such a radar comprises for example 2 modulators, 1 first modulator for the generation of waves for detecting objects and a second modulator for generating waves having suitable characteristics for transporting communication data.
- each radar comprises only one modulator and offers the dual functionality of object detection/communication by implementing a spread spectrum technique, for example direct sequence spread spectrum (or DSSS in English). , for "Direct-Sequence Spread Spectrum”), frequency hopping spread spectrum (or FHSS in English, for "Frequency-Hopping Spread Spectrum”) or even CDMA (from English "Code Division Multiple Access” or in French “Accès multiple par division en code”).
- a spread spectrum technique for example direct sequence spread spectrum (or DSSS in English).
- DSSS direct sequence spread spectrum
- FHSS frequency hopping spread spectrum
- CDMA from English "Code Division Multiple Access” or in French “Accès multiple par division en code”.
- the dual object detection/communication functionality is implemented by the use of the OFDM technique (from the English “Orthogonal Frequency-Division Multiplexing” or in French “Multiplexing by distribution of orthogonal frequencies”).
- the radars of the radar system of the first vehicle 10 are for example used within the framework of an automobile driving assistance system (ADAS in English, for
- Advanced driver-assistance system A part of the radars is for example used for the detection of objects (other vehicles, obstacles, pedestrians for example) and another part of the radars for the detection of blind spots.
- the ADAS function or functions using the data obtained from the radars correspond for example to one or more of the following functions:
- the first vehicle 10 comprises for example 4 radars 101, 102, 103 and 104 suitable for detecting objects and transmitting (and receiving) communication data, for example of the V2V or V2I type, to (from) another communication equipment.
- the 4 radars correspond for example to corner radars (from the English “Corner radar”) arranged at each “corner” of the vehicle, for example 1 front left radar 101, 1 front right radar 102, 1 rear right radar 103 and 1 rear left radar 104.
- Each radar is for example arranged on the first vehicle 10 so that the main axis of emission of the electromagnetic waves forms an angle of 45° with the longitudinal axis 100 of the first vehicle 10.
- Such a main axis transmission 1030 is represented in FIG.
- Each radar 101 to 104 emits waves according to a determined angular sector, for example 90° or 120° around the main transmission axis, which makes it possible to cover 360° in transmission/reception around the first vehicle 10.
- the radars 101 to 104 of the radar system are for example implemented within the framework of an automobile driving assistance system (ADAS in English, for “Advanced driver-assistance system”).
- the radars are for example used for the detection of objects (obstacles, pedestrians for example) and/or for the detection of blind spots.
- the number of radars arranged on the first vehicle 10 is not limited to 4 but extends to any number, for example 6, 8, 10 or more radars.
- the first vehicle 10 comprises for example one or more front radars in addition to the radars 101, 102, one or more rear radars in addition to the radars 103, 104 and/or radars arranged on the exterior mirrors for blind spot detection, etc.
- the angle between the main emission axis and the longitudinal axis 100 then depends on the position of the radar.
- the second vehicle or vehicles 11 to 13 with which the first vehicle 10 communicates in V2V are also equipped with such a system of radars configured to transmit and receive electromagnetic waves for data communication.
- a system of radars configured to transmit and receive electromagnetic waves for data communication.
- Only the left rear radar 131 is illustrated for the second vehicle 13 and only the right rear radar 121 is illustrated for the second vehicle 12.
- Each radar operates for example in the frequency band around 77 GHz, for example in the 76-81 GHz band, according to standard EN 302 264.
- the presence of the second vehicle 12 near the first vehicle 10 is detected by the radar 101 of the first vehicle 10 and the presence of the second vehicle 13 is detected by radar 102.
- Object detection by radar is based on the Doppler effect.
- electromagnetic waves are emitted by the radars, these waves being for example maintained with linear frequency modulation (FMCW or LMCW, from the English “Frequency Modulated Continuous Wave” or “Linear Modulated Continuous Wave”), as is classically the case for radars on board a vehicle.
- FMCW linear frequency modulation
- LMCW linear frequency modulation
- Such modulation makes it possible to obtain information about the distance and speed of detected objects.
- the waves are emitted for propagation in the air at a power and under determined radiation conditions.
- the reflected waves are received by the radar for processing and analysis, in order to deduce the useful information (distance of the detected object from the radar, speed of the object detected, azimuth of the object detected corresponding to the angle of incidence of the wave in a horizontal plane parallel to the plane of the road obtained by several antennas receiving the reflected waves, the azimuth being determined from the differences in phases between the reflected waves received).
- the data thus obtained from the radar or radars having detected an object such as a second vehicle 11 to 13 make it possible to determine a position of the second vehicle 11 to 13 detected vis-à-vis the first vehicle 10 (that is to say a relative position).
- the relative position is for example determined from distance information between the first vehicle 10 and the second vehicle detected, this distance information being obtained from the radar having detected the second vehicle.
- the information relating to the radar having detected the second vehicle is also transmitted to the computer in charge of the process.
- information identifying the radar 101 is for example associated with the distance data obtained between the first vehicle 10 and the second vehicle 12 by this radar 101 . This identification information is then transmitted with the distance data to the computer in charge of the radar system.
- the activation of the turn signals is for example detected by the computer or computers in charge of the process upon receipt of data or information representative of the activation of one or more turn signals.
- the flashing lights of the first vehicle 10 are advantageously controlled by one or more computers of the on-board system of the first vehicle 10, which transmit to the computer in charge of the process the information relating to the activation of one or more indicators.
- the vehicle's on-board system comprises a set of computers linked together by one or more communication buses. These computers form, for example, a multiplexed architecture for the realization of various useful services for the correct operation of the vehicle and to assist the driver and/or the passengers of the vehicle in the control of the vehicle 10.
- the computers exchange data between them by the intermediary of one or more computer buses, for example a communication bus of the CAN data bus type (from the English “Controller Area Network” or in French “Network of controllers”), CAN FD (from the English “Controller Area Network Flexible Data-Rate” or in French “Network of controllers with flexible data rate”), FlexRay (according to ISO 17458 standard) or Ethernet (according to ISO/IEC 802-3 standard).
- CAN data bus type from the English "Controller Area Network” or in French “Network of controllers”
- CAN FD from the English "Controller Area Network Flexible Data-Rate” or in French “Network of controllers with flexible data rate”
- FlexRay accordinging to ISO 17458 standard
- Ethernet accordinging to ISO/IEC 802-3 standard.
- the turn signals are for example activated by the driver via one or more flashing light actuating members arranged in the passenger compartment of the first vehicle 10.
- the control of the activation and deactivation of each of the flashing lights is thus a function of control signals received from the control member(s).
- the activation and deactivation of flashing lights to indicate a change of direction is obtained by operating a control lever (corresponding for example to a commodo lever), for example arranged near the steering wheel. For example, moving the control lever upwards from the neutral position controls the activation of the left direction indicators, pressing the control lever downwards from the neutral position controls the activation of the right direction indicators, the return to the neutral position deactivating the left or right activated flashing lights.
- a control lever corresponding for example to a commodo lever
- a slight pressure upwards or downwards controls the activation of the left or right indicators for a determined time interval (for example 1, 2 or 3 seconds), the lever automatically returning to the neutral position and the flashing lights deactivating (ie going out) automatically at the end of the determined time interval.
- the detection of one or more second vehicles is added to the detection of the activation of the turn signals (for example on one side of the first vehicle 10 to indicate a change of direction), for example of concomitantly or with a time lag between the two detections, for example equal to 0.5, 1, 2 or 3 seconds.
- one or more radars of the radar system of the first vehicle 10 are selected according to the traffic event(s) detected in the first operation.
- the selected speed cameras correspond to those on the right side (respectively on the left side ) of the first vehicle 10, that is to say the radars 102, 103 (respectively the radars 101, 104).
- the selected radars correspond to those having in their coverage area (the area covered by the emission of electromagnetic radiation suitable for object detection, which also corresponds to the coverage area for emission and/or reception of V2V communication signals) the second vehicles 12, 13 detected.
- the coverage area the area covered by the emission of electromagnetic radiation suitable for object detection, which also corresponds to the coverage area for emission and/or reception of V2V communication signals.
- the front left radar 101 is selected because the second vehicle 12 is in the coverage zone of the radar 101.
- the right front radar 102 is selected because the second vehicle 13 is in the coverage area of radar 102.
- the radar(s) selected correspond to the radar(s) having detected the second vehicle(s).
- the selection of the radar(s) is thus implemented as a function of the information relating to the radar having detected the second vehicle received from the radar system, this information making it possible to directly identify the radar having the second vehicle detected in its coverage area. .
- data is transmitted by the first vehicle 10 to at least one second vehicle in the road environment 1 via the radar(s) selected according to the vehicle-to-vehicle type communication mode, called V2V.
- V2V vehicle-to-vehicle type communication mode
- the transmission of such data in broadcast mode via the radars on the side corresponding to that of the lane change of the first vehicle 10 makes it possible to reach all of the second vehicles potentially traveling on this adjacent lane, without the need to detect them individually or to identify them as the recipient of the data.
- the data correspond to a request sent by the first vehicle 10 to ask the second vehicles circulating on the adjacent lane to leave a free space so that the first vehicle 10 can insert itself without risk on this adjacent lane.
- the data transmitted by the first vehicle in V2V mode via the selected radar 101 correspond for example intended specifically for this second vehicle 12.
- the data is for example transmitted in unicast mode (or “unicast” in French).
- the data relating to each second vehicle are for example transmitted in unicast mode to each second vehicle by each radar having detected the second vehicle.
- the data intended for the second vehicle 12 is transmitted in unicast mode via the radar 101 and the data intended for the second vehicle 13 is transmitted in unicast mode via the radar 102.
- the selection of several radars as a function of the event(s) detected makes it possible to implement several simultaneous communications in parallel, a sector or a different spatial communication zone being associated with each radar of the radar system of the first vehicle, due to the distribution spatial radars on the first vehicle 10.
- an overlap of the spatial zones covered by each selected radar is for example obtained.
- the data transmission range is then greater than that obtained in a spatial zone covered by a single selected radar.
- the electromagnetic waves transmitted for the transport of data according to the V2V communication mode are for example transmitted according to one of the following channel access methods: - OFDMA, from English “Orthogonal Frequency Division Multiple Access” or in French “Access multiple à division en frequency orthogonale”;
- the selection of radars according to one or more traffic events associated with the first vehicle 10 makes it possible to spatially manage the transmission of data, by covering a complete space around the first vehicle 10 thanks to the arrangement and distribution of the radars on the first vehicle 10.
- Such an arrangement makes it possible to benefit from the advantages of a mode of communication called “beamforming” (or “spatial filtering” in French), without however having to configure the phase shift between the different radars, as required by this technology.
- beamforming or “spatial filtering” in French
- spatial filtering is obtained by combining the elements of a phased array of antennas in such a way that in particular directions, the signals interfere constructively while in other directions the interference is destructive.
- the invention makes it possible to benefit from certain advantages of “beamforming” (for example more directivity in the emission beams) without implementing this “beamforming” technology which is relatively complex in terms of configuration.
- FIG. 2 schematically illustrates a device 2 configured to control the communications implemented through a radar system fitted to a vehicle, according to a particular and non-limiting embodiment of the present invention.
- the device 2 corresponds for example to a device on board the first vehicle 10 to allow data communication between the first vehicle 10 and one or more second vehicles 11, 12, 13 in V2V communication mode.
- the device 2 is for example configured for the implementation of the operations described with regard to FIG. 1 and/or the steps of the method described with regard to FIG. 4.
- Examples of such a device 2 comprise, without being limited thereto , on-board electronic equipment such as a vehicle's on-board computer, an electronic computer such as an ECU, a TCU (Telematic Control Unit) telematics control unit, a smart phone (from the English "smartphone"), tablet, laptop.
- the elements of device 2, individually or in combination, can be integrated in a single integrated circuit, in several integrated circuits, and/or in discrete components.
- the device 2 can be made in the form of electronic circuits or software (or computer) modules or else a combination of electronic circuits and software modules. According to various particular embodiments, the device 2 is coupled in communication with other similar devices or systems, for example via a communication bus or via dedicated input/output ports.
- the device 2 comprises one (or more) processor(s) 20 configured to execute instructions for carrying out the steps of the method and/or for executing the instructions of the software or software embedded in the device 2.
- the processor 20 can include integrated memory, an input/output interface, and various circuits known to those skilled in the art.
- the device 2 further comprises at least one memory 21 corresponding for example to a volatile and/or non-volatile memory and/or comprises a memory storage device which can comprise volatile and/or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, magnetic or optical disk.
- the computer code of the on-board software or software comprising the instructions to be loaded and executed by the processor is for example stored on the first memory 21.
- the device 2 comprises a block 22 of interface elements for communicating with external devices, for example a remote server or the "cloud", other devices similar to the device 2 and embedded in vehicles other than the one on board the device 2.
- the interface elements of block 22 comprise one or more of the following interfaces:
- radio frequency interface for example of the Bluetooth® or Wi-Fi® type, LTE (from English “Long-Term Evolution” or in French “Evolution à long terme”), LTE-Advanced (or in French LTE-advanced );
- USB interface from the English “Universal Serial Bus” or “Universal Serial Bus” in French);
- Data are for example loaded to the device 2 via the interface of block 22 using a Wi-Fi® network such as according to IEEE 802.11, an ITS G5 network based on IEEE 802.11 p or a mobile network such as a 4G network (or LTE Advanced according to 3GPP release 10 - version 10) or 5G, in particular an LTE-V2X network.
- a Wi-Fi® network such as according to IEEE 802.11, an ITS G5 network based on IEEE 802.11 p or a mobile network such as a 4G network (or LTE Advanced according to 3GPP release 10 - version 10) or 5G, in particular an LTE-V2X network.
- the device 2 comprises a communication interface 23 which makes it possible to establish communication with other devices, such as for example the GPS-type location system, the mobile communication system (GSM, GPRS, Wi-Fi, Bluetooth, LTE, LTE-V, ITS G5)) or the radars of the radar system via a communication channel 230.
- the communication interface 23 corresponds for example to a transmitter configured to transmit and receive information and/or data via the communication channel 230.
- the communication interface 23 corresponds for example to a wired network of the CAN type (from the English “Controller Area Network” or in French “Network of controllers”) or CAN FD (from the English “Controller Area Network Flexible Data-Rate” or in French “Network of controllers with flexible data rate”).
- the device 2 can provide output signals to one or more external devices, such as a display screen, one or more loudspeakers and/or other peripherals respectively via interfaces output not shown.
- FIG. 3 schematically illustrates a communication system 3 for a vehicle, for example on board the first vehicle 10, according to a particular and non-limiting example embodiment of the present invention.
- System 3 advantageously comprises device 2 as described with reference to FIG. 2 in connection with a plurality of radars forming the radar system.
- the radar system comprises the 4 corner radars 101, 102, 103 and 104 as described with regard to figure 1.
- the device 2 is configured to control the radar system, for example according to the traffic event(s) detected leading to the selection of one or more radars of the radar system of the first vehicle 10.
- the device 2 is connected to the radars via a wired link, for example via a CAN or CAN FD type data bus or via one or more LIN type buses. According to a variant, the device 2 is connected to the radars 101 to 104 via a wireless interface, for example in Bluetooth® or in Wifi®.
- FIG. 4 illustrates a flowchart of the different steps of a communication method implemented by a vehicle on board a radar system comprising at least one millimeter wave radar, according to a particular and non-limiting example embodiment of the present invention.
- the method is for example implemented by a device on board the first vehicle 10, by the device 2 of figure 2 or by the system 3 of figure 3.
- a first step 41 at least one event associated with movement of the first vehicle in a road environment is detected.
- a second step 42 at least one radar of the first vehicle's radar system is selected as a function of the at least one detected event.
- data is transmitted to at least one second vehicle in the road environment via the at least one radar selected according to a vehicle-to-vehicle type communication mode, called V2V.
- the invention also relates to a vehicle, for example an automobile or more generally a land motor vehicle, comprising the device 2 of FIG. 2 or the system 3 of FIG. 3.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2201602A FR3132958B1 (fr) | 2022-02-23 | 2022-02-23 | Procédé et dispositif de communication de données par sélection d’au moins un radar dans une pluralité de radars d’un véhicule |
| PCT/FR2023/050045 WO2023161569A1 (fr) | 2022-02-23 | 2023-01-12 | Procédé et dispositif de communication de données par sélection d'au moins un radar dans une pluralité de radars d'un véhicule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4483202A1 true EP4483202A1 (fr) | 2025-01-01 |
Family
ID=81449059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23703090.3A Pending EP4483202A1 (fr) | 2022-02-23 | 2023-01-12 | Procédé et dispositif de communication de données par sélection d'au moins un radar dans une pluralité de radars d'un véhicule |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4483202A1 (fr) |
| FR (1) | FR3132958B1 (fr) |
| WO (1) | WO2023161569A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2248023C2 (de) | 1972-09-29 | 1974-07-11 | Krone Gmbh, 1000 Berlin | In die Sprechkapsel, insbesondere eines Fernsprech-Handapparates eingebautes Kohlemikrofon |
| WO2012037680A1 (fr) | 2010-09-20 | 2012-03-29 | Corporation De L'ecole Polytechnique De Montreal | Système radar avec fonction de communication intégrée |
| DE102012023361A1 (de) * | 2012-11-28 | 2014-05-28 | Audi Ag | Verfahren und Vorrichtung zum Absichern eines Spurwechsels und Fahrzeug |
| US11656322B2 (en) * | 2019-07-03 | 2023-05-23 | Radchat Ab | Method for reducing mutual interference in radars |
| EP3828593A1 (fr) * | 2019-11-26 | 2021-06-02 | Veoneer Sweden AB | Radar ofdm pour véhicule et système de communication |
| FR3106553A1 (fr) * | 2020-01-24 | 2021-07-30 | Psa Automobiles Sa | Procédé et dispositif de traitement de données d’environnement de véhicule |
-
2022
- 2022-02-23 FR FR2201602A patent/FR3132958B1/fr active Active
-
2023
- 2023-01-12 EP EP23703090.3A patent/EP4483202A1/fr active Pending
- 2023-01-12 WO PCT/FR2023/050045 patent/WO2023161569A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3132958A1 (fr) | 2023-08-25 |
| FR3132958B1 (fr) | 2024-01-19 |
| WO2023161569A1 (fr) | 2023-08-31 |
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