WO2020085120A1 - Station de base, système de communication de transport, et procédé de commande - Google Patents

Station de base, système de communication de transport, et procédé de commande Download PDF

Info

Publication number
WO2020085120A1
WO2020085120A1 PCT/JP2019/040204 JP2019040204W WO2020085120A1 WO 2020085120 A1 WO2020085120 A1 WO 2020085120A1 JP 2019040204 W JP2019040204 W JP 2019040204W WO 2020085120 A1 WO2020085120 A1 WO 2020085120A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
mode
communication
base station
control unit
Prior art date
Application number
PCT/JP2019/040204
Other languages
English (en)
Japanese (ja)
Inventor
忍 藤本
Original Assignee
京セラ株式会社
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 京セラ株式会社 filed Critical 京セラ株式会社
Priority to JP2020553152A priority Critical patent/JP7309749B2/ja
Publication of WO2020085120A1 publication Critical patent/WO2020085120A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • 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
    • 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
    • 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]
    • H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to a base station, a traffic communication system, and a control method for an intelligent transportation system.
  • Non-Patent Document 1 has a roadside device that is a base station installed on the roadside and an on-vehicle device that is a mobile station installed in a vehicle. Describes a traffic communication system that performs wireless communication (road-to-vehicle communication).
  • Patent Document 1 describes that in a traffic communication system, a base station has a directional antenna, and this directional antenna forms a directional pattern (communication area) along an extension direction of a road. ing.
  • ARIB STD-T109 1.3 version "700 MHz band intelligent transportation system"
  • Non-Patent Document 1 Although adaptive array control for dynamically switching the directivity pattern may be applied to a roadside device, the traffic communication system as described in Non-Patent Document 1 is not premised on performing adaptive array control. , It is not easy for roadside devices to always use adaptive array control for road-to-vehicle communication.
  • an object of the present invention is to provide a base station, a traffic communication system, and a control method capable of improving the communication quality of road-to-vehicle communication while suppressing the complexity of base station installation work.
  • a base station is a base station that wirelessly communicates with a vehicle in a traffic communication system, and sets the directivity pattern from a first mode for setting a directivity pattern in the wireless communication.
  • a communication unit that can be formed and switched to a second mode for performing the wireless communication; and a position of the vehicle based on a wireless signal received from the vehicle by the communication unit in the first mode, And a control unit that acquires the directivity setting information including at least one of the arrival direction of the radio signal and the antenna weight, and holds the directivity setting information.
  • the control unit controls the communication unit to form the directivity pattern based on the held directivity setting information.
  • the traffic communication system according to the second aspect includes the base station according to the first aspect.
  • the control method is a method for a base station that wirelessly communicates with a vehicle in a traffic communication system.
  • the control method is based on a wireless signal received by the communication unit from the vehicle, the position of the vehicle, the arrival direction of the wireless signal, And acquiring the directivity setting information including at least one of the antenna weights, holding the directivity setting information, and forming the directivity pattern from the first mode to form the radio pattern.
  • the method further includes a step of switching to a second mode in which communication is performed, and a step of forming the directivity pattern based on the held directivity setting information in the second mode.
  • a base station a traffic communication system, and a control method capable of improving the communication quality of road-to-vehicle communication while suppressing the complexity of the base station installation work.
  • FIG. 1 is a diagram showing an example of a traffic communication system 100 according to an embodiment.
  • a case where the specific road 110 and the general road 120 intersect is illustrated.
  • a crossroad is illustrated as a case where the specific road 110 and the general road 120 intersect, the crossroad is not limited to the crossroad and may be a T-shaped road (also called a three-way road or a T-shaped road).
  • the specific road 110 and the general road 120 are orthogonal to each other in FIG. 1, the angle at which the specific road 110 and the general road 120 intersect is not limited.
  • intersection refers to the intersection of two or more roads (in the case of a road with a distinction between a sidewalk and a road, a road) when two or more roads intersect, and both a crossroad and a T-junction. It is assumed to be a concept including.
  • the specific road 110 is a road permitted to travel only to the specific vehicle 10A.
  • the specific vehicle 10A may be a vehicle of a predetermined type.
  • the predetermined type of vehicle may be a bus.
  • a bus is a relatively large car that carries passengers on a fixed route.
  • the predetermined type of vehicle may be a tram or the like.
  • the specific vehicle 10A may be an emergency vehicle.
  • the emergency vehicle is a vehicle used for urgent business for some reason such as lifesaving or fire response, and includes, for example, an ambulance, a fire engine, and / or a police vehicle.
  • the specific vehicle 10A may be limited to an emergency vehicle that is in an emergency travel. "Emergency traveling" means a state in which the vehicle is traveling while sounding a siren, or a state in which the vehicle is traveling while turning on a rotating lamp. In the following description, it is assumed that an emergency vehicle can be exceptionally allowed to travel on a bus exclusive road.
  • the general road 120 is a road where general vehicles are allowed to travel. General vehicles refer to all vehicles not limited to emergency vehicles.
  • the specific vehicle 10A is traveling on the specific road 110
  • the general vehicle 10B is traveling on the general road 120.
  • the roadside machine 40 is provided on the roadside of the specific road 110.
  • the roadside device 40 is an example of a base station.
  • a gate device 130 (gate device 131 and gate device 132) is provided on the specific road 110, and a traffic signal 140 (traffic signal 141 and traffic signal 142) is provided on the general road 120. ) May be provided.
  • the gate device 130 is an example of a traffic safety device
  • the traffic signal 140 is another example of a traffic safety device.
  • the vehicle 10 (specific vehicle 10A and general vehicle 10B) may be a vehicle such as a motorcycle, a motorcycle, or a vehicle.
  • the vehicle 10 performs wireless communication (roadside-vehicle communication) with the roadside device 40.
  • wireless communication roadside-vehicle communication
  • a case where the specific vehicle 10A is a bus is illustrated. Details of the vehicle 10 will be described later (see FIG. 3).
  • the roadside device 40 performs wireless communication (roadside-vehicle communication) with the vehicle 10.
  • the roadside device 40 has a function of communicating with the gate device 130.
  • the roadside device 40 may have a function of communicating with the traffic signal 140.
  • the vehicle 10 may perform wireless communication (inter-vehicle communication) with another vehicle.
  • the inter-vehicle communication may be performed at a timing when the road-to-vehicle communication is not performed. Details of the roadside device 40 will be described later (see FIG. 4).
  • the roadside device 40 may communicate with another roadside device (road-to-road communication).
  • the gate device 130 has a gate for restricting entry of the general vehicle 10B into the specific road 110.
  • the gate device 130 has a drive mechanism for opening and closing the gate, and a communication interface for performing communication with the roadside machine 40.
  • the gate device 130 is configured to close when the specific vehicle 10A does not pass through the intersection and open when the specific vehicle 10A passes through the intersection.
  • the gate device 130 may be opened and closed according to the operation schedule of the specific vehicle 10A.
  • the gate device 130 may be opened in response to the approach of the specific vehicle 10A to the intersection and may be closed in response to the departure of the specific vehicle 10A from the intersection.
  • the approach and departure of the specific vehicle 10A may be detected by the roadside device 40 based on whether or not a message can be received from the specific vehicle 10A, and then the roadside device 40 may notify the gate device 130.
  • the traffic signal 140 is configured to display a signal (for example, a green traffic light, a yellow traffic light, a red traffic light) indicating whether or not to allow the general vehicle 10B to pass through the intersection.
  • the traffic signal 140 may be configured to display a blinking signal that calls attention to the general vehicle 10B.
  • the traffic signal 140 may switch the signal according to a predetermined schedule.
  • the gate device 130 may switch the signal according to the approach of the specific vehicle 10A to the intersection and the departure of the specific vehicle 10A from the intersection. The approach and departure of the specific vehicle 10A may be detected by the roadside device 40 based on whether or not a message can be received from the specific vehicle 10A, and then notified from the roadside device 40 to the traffic signal 140.
  • the roadside device 40 preferably has a directional antenna, and the directional antenna preferably forms a directional pattern (communication area) along the extension direction of the specific road 110. It is considered that this can improve the communication quality of road-to-vehicle communication.
  • the roadside device 40 in order to form such a directivity pattern, it is necessary for an operator to manually set the directivity based on map information or the like when the roadside device 40 is installed. Therefore, the installation work of the roadside device 40 becomes complicated.
  • the roadside device 40 autonomously sets the directivity to form a directivity pattern (communication area) along the extension direction of the specific road 110. As a result, it is possible to improve the communication quality of the road-to-vehicle communication while suppressing the complexity of the installation work of the roadside device 40.
  • FIG. 2 is a diagram showing an example of the overall configuration of the traffic communication system 100 according to an embodiment.
  • each vehicle 10 is equipped with a mobile station 150 that performs wireless communication.
  • the mobile station 150 may be referred to as an in-vehicle device or an in-vehicle communication device. Further, the mobile station 150 may be a wireless terminal carried by a pedestrian.
  • the roadside device 40 and the mobile station 150 may use (shared) one carrier frequency (frequency band) in a time division manner.
  • each roadside unit 40 is installed near the road.
  • the roadside device 40 is installed on the traffic signal 140 or a pillar thereof, and operates in cooperation with the traffic signal 140.
  • the roadside device 40 may transmit a message including information about the traffic signal 140 (light color switching information, etc.).
  • the traffic communication system 100 there are road-to-vehicle communication for communicating between the roadside device 40 and the vehicle 10, inter-vehicle communication for communicating between the vehicles 10, and road-to-road communication for communicating between the roadside devices 40. It is possible. Broadcast-based wireless communication may be used for each of the road-to-vehicle communication, the vehicle-to-vehicle communication, and the road-to-road communication.
  • Each roadside device 40 may be connected to the central device 400 via a communication line.
  • a vehicle detector installed on the roadside may be connected to the central unit 400 via a communication line.
  • the central device 400 receives from each roadside device 40 vehicle information including the position and speed of the vehicle 10 which the roadside device 40 received from the vehicle 10, and receives vehicle detection information from roadside sensors installed on each road. To receive.
  • the central device 400 collects and processes various types of traffic information based on the received information and integrates and manages the road traffic system. For example, the central device 400 transmits a control command for instructing the traffic signal 140 to switch the light color, or transmits traffic information including traffic congestion information to the roadside device 40.
  • FIG. 3 is a diagram showing a configuration of the vehicle 10 according to the embodiment. As shown in FIG. 3, the vehicle 10 has a communication unit 11 and a control unit 12.
  • the communication unit 11 includes a wireless communication module.
  • the wireless communication module includes an antenna, converts a wireless signal received by the antenna into a baseband signal (received signal), and outputs the baseband signal to the control unit 12.
  • the wireless communication module converts the baseband signal (transmission signal) output by the control unit 12 into a wireless signal and transmits the wireless signal from the antenna.
  • the communication unit 11 may have a function of performing carrier sensing to determine an idle state of a radio frequency (for example, 700 MHz band).
  • the communication unit 11 transmits a packet at the timing when the frequency of the radio wave is vacant.
  • One message may be composed of one or more packets.
  • the communication unit 11 may perform road-to-vehicle communication or vehicle-to-vehicle communication.
  • the packet includes identification information used for identifying the transmission source, synchronization information indicating a synchronization method for the roadside device 40, packet transmission time, period information indicating a period of road-to-vehicle communication (transfer count of road-to-vehicle communication, period of road-to-vehicle communication Long) etc.
  • Vehicle-to-vehicle communication includes communication (packet transfer) that occurs with road-to-vehicle communication.
  • the message may include type information indicating the type of vehicle 10.
  • the type information indicating the type of the vehicle 10 may be information that uniquely identifies the type of the vehicle 10.
  • the type information is information indicating an ambulance.
  • the type information is information indicating a fire engine.
  • the type information is information indicating a police vehicle.
  • the message may include emergency vehicle information indicating whether the vehicle 10 is an emergency vehicle.
  • the emergency vehicle information may be information indicating whether the vehicle 10 is in an emergency run.
  • the emergency vehicle information may be a 1-bit flag indicating whether the vehicle 10 is an emergency vehicle or a 1-bit flag indicating whether the vehicle 10 is in an emergency run.
  • the message may include location information indicating the geographical location of the vehicle 10.
  • the position information is GNSS position information obtained by a GNSS (Global Navigation Satellite System) receiver provided in the vehicle 10.
  • the position information includes latitude and longitude.
  • the position information may further include altitude.
  • the control unit 12 is composed of a control circuit having a memory and a CPU.
  • the control unit 12 controls at least the communication unit 11.
  • the control unit 12 may control the communication unit 11 to transmit the message including the above-mentioned information.
  • the control unit 12 may control the communication unit 11 to periodically transmit the message, or may control the communication unit 11 to transmit the message only when the frequency of the radio wave is free. However, the communication unit 11 may be controlled to transmit a message in response to a request from the roadside device 40.
  • the message may be sent by broadcast. In such a case, the message may or may not include the information identifying the destination.
  • FIG. 4 is a diagram showing a configuration of the roadside device 40 according to the embodiment.
  • the roadside device 40 includes a communication unit 41 and a control unit 42.
  • the wireless communication system of the roadside device 40 may be based on ARIB T109, may be based on V2X (Vehicle to Everything) defined by 3GPP (3rd Generation Partnership Project), and may be based on a wireless LAN system. Good.
  • the roadside device 40 may be an all-in type that can support all of these communication standards.
  • the communication unit 41 includes a wireless communication module.
  • the wireless communication module includes an antenna and converts a wireless signal received by the antenna into a baseband signal (received signal) and outputs the baseband signal to the control unit 42.
  • the wireless communication module converts the baseband signal (transmission signal) output by the control unit 42 into a wireless signal and transmits the wireless signal from the antenna.
  • the communication unit 41 may further include a wire communication module.
  • the wired communication module may be used for road-to-road communication or may be used for communication with the central device 400.
  • the communication unit 41 may have a function of performing carrier sensing to determine an idle state of a radio frequency (for example, 700 MHz band).
  • the communication unit 41 transmits the packet at the timing determined by the control unit 42.
  • One message may be composed of one or more packets.
  • the communication unit 41 may perform road-to-vehicle communication or road-to-road communication.
  • the packet is identification information used for identifying the transmission source, synchronization information indicating a synchronization method for the roadside device 40, packet transmission time, and / or period information indicating a period of road-to-vehicle communication (for example, the number of times of road-to-vehicle communication transfer And / or period length of road-to-vehicle communication) and the like.
  • the communication unit 41 receives the above-mentioned message from the vehicle 10 by road-to-vehicle communication.
  • the communication unit 41 can switch from a first mode for setting a directional pattern in road-vehicle communication to a second mode for forming a directional pattern and performing road-vehicle communication. Composed.
  • the communication unit 41 may form the omnidirectional pattern in the first mode.
  • the first mode may be applied when the operation of the roadside device 40 is started after the installation of the roadside device 40. Alternatively, the first mode may be applied during the installation work of the roadside device 40.
  • the control unit 42 is composed of a control circuit having a memory and a CPU.
  • the control unit 42 controls the communication unit 41 and the traffic safety device. Further, the control unit 42 performs various processes and various controls described later.
  • the control unit 42 includes a directivity including at least one of the position of the vehicle 10, the arrival direction of the wireless signal, and the antenna weight, based on the wireless signal received by the communication unit 41 from the vehicle 10.
  • the setting information is acquired and the directivity setting information is held. Then, when the control unit 42 switches from the first mode to the second mode, the control unit 42 controls the communication unit 41 to form the directivity pattern based on the stored directivity setting information.
  • FIG. 5 is a diagram showing a configuration example of the communication unit 41.
  • the communication section 41 has an array antenna 41A, an array processing section 41B, and a directional pattern forming section 41C.
  • the array antenna 41A includes a plurality of antenna elements.
  • the array antenna 41A is used for beam forming for variably controlling a beam and null steering for variably controlling a null.
  • the array antenna 41A is a linear array type in which a plurality of antenna elements are linearly arranged, a planar array type in which a plurality of antenna elements are arranged in a planar shape (two-dimensional shape), or a circular type in which a plurality of antenna elements are arranged in a circular shape. It may be an array type.
  • the array processing unit 41B may calculate the antenna weight based on the radio signal received by the array antenna 41A under the control of the control unit 42. Specifically, the array processing unit 41B calculates the antenna weight in the first mode and outputs the calculated antenna weight to the control unit 42.
  • the antenna weight is a weighting coefficient for adjusting the phase and amplitude of the signal.
  • the array processing unit 41B calculates an antenna weight for each antenna element using a control algorithm based on a predetermined standard.
  • the predetermined criterion may be a minimum mean square error (MMSE: Minimum Mean Square Error) criterion.
  • MMSE Minimum Mean Square Error
  • the array processing unit 41B calculates the antenna weight so that the difference (error signal) between the desired wave replica (reference signal) and the actual array output signal is minimized.
  • the antenna weight may be calculated using the pilot signal defined in IEEE 802.11 as the reference signal. Instead of using such an existing pilot signal, a new reference signal for antenna weight calculation may be introduced.
  • the predetermined standard may be a constant envelope (CMA: Constant Modulus Algorithm) standard.
  • CMA Constant Modulus Algorithm
  • the array processing unit 41B calculates the antenna weight so as to make the envelope of the array output signal constant without requiring prior knowledge about the desired wave.
  • the array processing unit 41B performs arrival direction estimation that estimates from which direction the wireless signal received by the array antenna 41A is transmitted in the first mode, and outputs information indicating the estimated arrival direction to the control unit 42. You may.
  • the array processing unit 41B determines the arrival direction of the radio wave based on the delay amount of the radio wave in each antenna element. Can be calculated.
  • An algorithm such as the MUSIC method may be used for the DOA estimation.
  • the directional pattern forming unit 41C forms a directional pattern by applying an antenna weight to the transmission signal and the reception signal under the control of the control unit 42.
  • the directional pattern forming unit 41C weights each antenna element of the array antenna 41A by using an antenna weight, and combines the weighted signals for each antenna element to output the combined signal.
  • the reception directivity is controlled by performing processing.
  • the directivity pattern forming unit 41C performs, as a transmission process, a distribution process of distributing a transmission signal input from the control unit 42 for each antenna element, and weighting each antenna element of the array antenna 41A using an antenna weight.
  • the transmission directivity is controlled by performing weighting processing.
  • the reversibility of the propagation path is used to make up / down movement. It is possible to use the same antenna weight in.
  • the directional pattern forming unit 41C may form an omnidirectional pattern without forming a directional pattern in the first mode.
  • the omnidirectional pattern may be formed using only one antenna element among the plurality of antenna elements of the array antenna 41A.
  • the directional pattern forming unit 41C forms the directional pattern using the antenna weight input from the control unit 42.
  • FIG. 6 is a diagram illustrating an example of control operation of the roadside device 40 according to the embodiment.
  • step S1 the control unit 42 sets the first directivity pattern for setting the road-vehicle communication directivity after the operation of the roadside device 40 is started or when the roadside device 40 is installed. Apply the mode.
  • the control unit 42 controls the communication unit 41 so as to form an omnidirectional pattern.
  • the first mode may be applied for a predetermined time. Alternatively, the first mode may be applied until the directivity setting information is accumulated by a predetermined amount.
  • step S2 the control unit 42 sets the directivity setting including at least one of the position of the vehicle 10, the arrival direction of the wireless signal, and the antenna weight based on the wireless signal received by the communication unit 41 from the vehicle 10. Information is acquired, and the acquired directivity setting information is held.
  • the control unit 42 may acquire and retain the position information (GNSS position information) in the message included in the received signal output from the communication unit 41 to the control unit 42.
  • the control unit 42 may acquire and hold the arrival direction information output from the communication unit 41 to the control unit 42.
  • FIG. 7 is a diagram showing an example of directivity setting information held by the control unit 42 in the first mode.
  • the control unit 42 determines whether the vehicle that is the transmission source of the wireless signal (message) is the specific vehicle 10A (bus, emergency vehicle) based on the information in the message included in the received signal, or It is confirmed whether the vehicle is a general vehicle 10B other than the specific vehicle 10A. Then, the control unit 42 separately holds (stores) the directivity setting information corresponding to the specific vehicle 10A and the directivity setting information corresponding to the general vehicle 10B.
  • the directivity setting information corresponding to the specific vehicle 10A is used for beamforming in the second mode.
  • the directivity setting information corresponding to the general vehicle 10B is used for null steering in the second mode.
  • control unit 42 specifies the position and / or direction of the specific road 110 based on the history of position information and / or the history of arrival direction information corresponding to the specific vehicle 10A. Further, the control unit 42 identifies the position and / or direction of the general vehicle 10B based on the history of position information and / or the history of arrival direction information corresponding to the general vehicle 10B. Then, the control unit 42 calculates the antenna weight in which the beam is directed to the position and / or direction of the specific road 110 and the null is directed to the position and / or direction of the general vehicle 10B.
  • the control unit 42 may acquire and hold the antenna weight output from the communication unit 41 to the control unit 42. Specifically, the control unit 42 holds (stores) the antenna weight calculated when the communication unit 41 receives the wireless signal from the specific vehicle 10A. This antenna weight is an antenna weight in which the beam is directed to the specific vehicle 10A and the null is directed to the general vehicle 10B.
  • the control unit 42 may calculate the optimum antenna weight from the history of the antenna weight. Further, the control unit 42 may calculate the optimum antenna weight from such an antenna weight and the antenna weight calculated from the position information and / or the arrival direction information.
  • step S3 the control unit 42 switches from the first mode to the second mode.
  • the control unit 42 outputs the antenna weight calculated using the directivity setting information to the communication unit 41 (directivity pattern forming unit 41C).
  • the communication unit 41 (directivity pattern forming unit 41C) forms the directivity pattern using the antenna weight input from the control unit 42.
  • FIG. 8 and 9 are diagrams showing an operation example of the traffic communication system 100 according to the embodiment.
  • FIG. 8 shows an operation example in the first mode
  • FIG. 9 shows an operation example in the second mode.
  • the traffic communication system 100 has a roadside device 40 that controls a traffic safety device provided at an intersection where a specific road 110 and a general road 120 intersect.
  • FIG. 8 illustrates an example in which the specific road 110 is a bus-only road that is a one-lane road, and the general road 120 is a two-lane road that is one lane on each side.
  • the traffic safety device provided at the intersection includes traffic signals 141 and 142 and gate devices 131 and 132.
  • a traffic signal may be provided instead of the gate devices 131 and 132.
  • the roadside device 40 may transmit a control command for instructing to open or close the gate to the gate devices 131 and 132 by performing road-vehicle communication with the specific vehicle 10A.
  • the roadside device 40 may transmit a control command instructing switching of displayed signals to the traffic signal devices 141 and 142 by performing road-vehicle communication with the specific vehicle 10A. Such communication may be performed by wire or wirelessly.
  • the roadside device 40 forms an omnidirectional pattern.
  • the roadside device 40 can grasp the position and direction of the specific road 110 based on the information (directivity setting information) acquired from the specific vehicle 10A passing through the specific road 110.
  • the roadside device 40 can grasp the position, direction, etc. of the general vehicle 10B based on the information (directivity setting information) acquired from the general vehicle 10B passing through the general road 120.
  • the roadside device 40 forms a directivity pattern based on the directivity setting information acquired and held in the first mode.
  • This directivity pattern is a directivity pattern in which the beam is directed to the specific vehicle 10A (specific road 110) and the null is directed to the general vehicle 10B (general road 120). With such a directivity pattern, the communication quality of road-to-vehicle communication with the specific vehicle 10A can be improved.
  • the roadside device 40 may form the directional pattern in the first mode.
  • the roadside device 40 may perform (quasi-static) adaptive array control in a possible range in the first mode.
  • the roadside device 40 may have an omnidirectional antenna and a directional antenna, and the directivity may be controlled by mechanically driving the directional antenna.
  • the omnidirectional antenna is used in the first mode and the directional antenna is used in the second mode.
  • the traffic safety device may be a wireless device that wirelessly transmits various instructions to the vehicle 10.
  • a traffic safety device radio device
  • a signal in other words, a signal indicating whether or not the vehicle 10 can pass.
  • an instruction signal for advancing / stopping the vehicle 10 may be transmitted to the vehicle 10.
  • a traffic safety device may be integrated with the roadside device 40.
  • a program may be provided that causes a computer to execute the processes of the roadside device 40 described above.
  • the program may be recorded on a computer-readable medium.
  • a computer readable medium can be used to install the program on a computer.
  • the computer-readable medium in which the program is recorded may be a non-transitory recording medium.
  • the non-transitory recording medium is not particularly limited, but may be a recording medium such as a CD-ROM or a DVD-ROM.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Traffic Control Systems (AREA)

Abstract

L'invention concerne une station de base destinée à effectuer une radiocommunication avec un véhicule dans un système de communication de transport. Dans un premier mode de réglage d'un motif de directivité dans la radiocommunication, ladite station de base acquiert et conserve, sur la base d'un signal radio reçu par une unité de communication à partir du véhicule, des informations de réglage de directivité comprenant au moins l'un parmi l'emplacement du véhicule, une direction d'arrivée du signal radio et un poids d'antenne. La station de base commute du premier mode à un deuxième mode dans lequel le motif de directivité est formé et la radiocommunication est effectuée, et, dans le deuxième mode, forme le motif de directivité sur la base des informations de réglage de directivité conservées.
PCT/JP2019/040204 2018-10-26 2019-10-11 Station de base, système de communication de transport, et procédé de commande WO2020085120A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020553152A JP7309749B2 (ja) 2018-10-26 2019-10-11 基地局、交通通信システム、及び制御方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018201624 2018-10-26
JP2018-201624 2018-10-26

Publications (1)

Publication Number Publication Date
WO2020085120A1 true WO2020085120A1 (fr) 2020-04-30

Family

ID=70331947

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/040204 WO2020085120A1 (fr) 2018-10-26 2019-10-11 Station de base, système de communication de transport, et procédé de commande

Country Status (2)

Country Link
JP (1) JP7309749B2 (fr)
WO (1) WO2020085120A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10145286A (ja) * 1996-11-13 1998-05-29 Sumitomo Electric Ind Ltd 移動体無線通信システム
JP2002055152A (ja) * 2000-08-10 2002-02-20 Matsushita Electric Ind Co Ltd 方位推定装置、指向性制御アンテナ装置及び方位推定方法
JP2002359584A (ja) * 2001-05-31 2002-12-13 Matsushita Electric Ind Co Ltd 無線基地局装置及び指向性送信方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4151170B2 (ja) * 1999-09-17 2008-09-17 株式会社デンソー 無線通信システム及び指向性制御データ生成装置
JP4716896B2 (ja) * 2006-02-22 2011-07-06 株式会社トヨタＩｔ開発センター 通信エリア制御装置、通信エリア制御方法、車載機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10145286A (ja) * 1996-11-13 1998-05-29 Sumitomo Electric Ind Ltd 移動体無線通信システム
JP2002055152A (ja) * 2000-08-10 2002-02-20 Matsushita Electric Ind Co Ltd 方位推定装置、指向性制御アンテナ装置及び方位推定方法
JP2002359584A (ja) * 2001-05-31 2002-12-13 Matsushita Electric Ind Co Ltd 無線基地局装置及び指向性送信方法

Also Published As

Publication number Publication date
JPWO2020085120A1 (ja) 2021-09-24
JP7309749B2 (ja) 2023-07-18

Similar Documents

Publication Publication Date Title
US11330410B2 (en) Pathside communication relay (PCR) for collecting and distributing pathside data among client devices
US7868783B2 (en) Cellular-based preemption system
US20130194108A1 (en) System, Method, Control Device and Program for Vehicle Collision Avoidance Using Cellular Communication
WO2020261908A1 (fr) Appareil de bord de route et procédé de commande de congestion de communication
US20140051346A1 (en) Methods and apparatus for communicating safety message information
JP5135255B2 (ja) 安全運転支援システム
KR20010067134A (ko) 긴급차량 우선제어 기능을 갖는 차량 통행 지원장치
KR102419309B1 (ko) 차량 대 차량 통신을 위한 방법
JP7094383B2 (ja) 交通通信システム、路側機、及び方法
CN111654810A (zh) 无线通信的方法以及在交通工具中使用的装置和交通工具
JP2018022304A (ja) 路側通信機、車載通信機、交通システムおよび通信方法
JP2008148131A (ja) 車車間通信の発信信号周波数設定システム及びその発信信号周波数設定方法
JP7553573B2 (ja) 車両対あらゆるモノ（ｖ２ｘ）によって支援されるローカルナビゲーション
WO2019040024A2 (fr) Système et procédé de diffusion par acheminement et traitement d'informations d'avertissement sur le trafic pour avertir un conducteur
WO2007022134A2 (fr) Systeme de circulation en mode prioritaire base sur le systeme cellulaire
WO2020085120A1 (fr) Station de base, système de communication de transport, et procédé de commande
Buinevich et al. V2X-based intersection priority management
Maitipe et al. Development and field demonstration of DSRC based V2V-Assisted V2I traffic information system for the work zone
JP4595984B2 (ja) 車両通信システム
JP7167170B2 (ja) 基地局、車両、及び交通通信システム
JP7217284B2 (ja) 基地局、交通通信システム、及び制御方法
WO2020166664A1 (fr) Dispositif d'aide au transit, station de base, véhicule et procédé d'aide au transit
JP2009239458A (ja) 車両通信中継装置及び車両通信システム
JP5206460B2 (ja) 車車間通信装置
JP7138186B2 (ja) 交通通信システム、基地局、及び交通制御方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19876965

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2020553152

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19876965

Country of ref document: EP

Kind code of ref document: A1