JP2018120550A - Vehicle communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle communication system capable of realizing communication between a self vehicle and a communication server in an appropriate manner.SOLUTION: In a vehicle communication system including a communication server that communicates with a plurality of communication vehicles and a vehicle control device, the communication server comprises: a communication vehicle position recognition unit that recognizes a position on a map of a plurality of communication vehicles in communication; a traffic volume information generating unit for generating traffic volume information on a traffic volume for each section preset on the map; a host vehicle information acquisition unit that acquires self vehicle information including a travel frequency for each section of the self vehicle; and a communication parameter setting unit that sets a communication parameter with the self vehicle for each section on the basis of the traffic volume information and the self vehicle information. The vehicle control device comprises: a traveling frequency recognition unit that recognizes a traveling frequency of each section of the self vehicle on the basis of a traveling history of the self vehicle; and a communication parameter updating unit that updates a communication parameter with the communication server on the basis of the setting of the communication parameter setting unit of the communication server.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle communication system.

  Conventionally, JP-A-2004-245758 is known as a technical document related to a vehicle communication system. This publication shows that in a system for managing traffic information using network communication with a vehicle, traffic information on a route traveled by the first mobile unit is transmitted to the second mobile unit.

JP 2004-245758 A

  In the future, in order to appropriately execute vehicle control such as automatic driving, it is assumed that a large amount of information is communicated between the vehicle and the communication server. However, since there is a limit to the network, it is desirable to perform communication in an appropriate manner according to the necessity of the host vehicle.

  Therefore, in this technical field, it is desired to provide a vehicle communication system capable of realizing communication between the host vehicle and the communication server in an appropriate manner.

  In order to solve the above problems, the present invention provides a vehicle communication system including a communication server that performs communication with a plurality of communication vehicles, and a vehicle control device that performs vehicle control of the host vehicle based on a communication result with the communication server. The communication server includes a communication vehicle position recognition unit for recognizing positions on a map of a plurality of communication vehicles in communication and communication on a map of the plurality of communication vehicles in communication. The own vehicle including the travel frequency for each section of the own vehicle through communication with the own vehicle and the traffic information generating unit that generates the traffic information related to the traffic for each section preset on the map based on the position A vehicle parameter information acquisition unit that acquires information, and a communication parameter setting unit that sets communication parameters with the vehicle for each section based on the traffic volume information and the vehicle information. The position of the vehicle on the map A vehicle position recognition unit that recognizes the vehicle, a travel history database that stores a travel history of the host vehicle based on a position on the map of the host vehicle, and a travel that recognizes a travel frequency for each section of the host vehicle based on the travel history. A frequency recognizing unit; and a communication parameter updating unit that updates communication parameters with the communication server based on settings of the communication parameter setting unit of the communication server.

  The vehicle communication system according to the present invention can realize communication between the host vehicle and the communication server in an appropriate manner.

1 is a diagram illustrating a vehicle communication system according to an embodiment. (A) It is a top view for demonstrating how the vehicle is used for every area. (B) It is a table | surface which shows the setting of the communication parameter according to the kind of how a vehicle is used. It is a flowchart which shows the production | generation process of traffic volume information. It is a flowchart which shows the setting process of a communication parameter. It is a flowchart which shows the update process of a communication parameter.

  Embodiments of the present invention will be described below with reference to the drawings.

[Configuration of vehicle communication system]
FIG. 1 is a diagram illustrating a vehicle communication system according to the present embodiment. As shown in FIG. 1, the vehicle communication system 100 includes a vehicle control device 50 and a communication server 60.

  The vehicle control device 50 performs vehicle control of the host vehicle. The vehicle control includes at least one of automatic driving control, driving support control, driver guidance control, and driver alert control.

  The vehicle control device 50 includes an ECU [Electronic Control Unit] 10 that comprehensively manages the device. The ECU 10 is an electronic control unit having a CPU [Central Processing Unit], a ROM [Read Only Memory], a RAM [Random Access Memory], a CAN [Controller Area Network] communication circuit, and the like. In the ECU 10, for example, various functions are realized by loading a program stored in the ROM into the RAM and executing the program loaded in the RAM by the CPU. The ECU 10 may be composed of a plurality of electronic units.

  The ECU 10 is connected to the GPS receiver 1, external sensor 2, internal sensor 3, vehicle-side map database 4, travel history database 5, vehicle-side communication unit 6, and actuator 7.

  The GPS receiver 1 measures the position of the host vehicle (for example, the latitude and longitude of the host vehicle) by receiving signals from three or more GPS satellites. The GPS receiver 1 transmits the measured position information of the host vehicle to the ECU 10.

  The external sensor 2 is a detection device that detects the situation around the host vehicle. The external sensor 2 includes at least one of a camera and a radar sensor.

  The camera is an imaging device that captures an external situation of the host vehicle. The camera is provided on the back side of the windshield of the host vehicle. The camera transmits imaging information related to the external situation of the host vehicle to the ECU 10. The camera may be a monocular camera or a stereo camera. The stereo camera has two imaging units arranged so as to reproduce binocular parallax. The imaging information of the stereo camera includes information in the depth direction.

  The radar sensor is a detection device that detects an obstacle around the host vehicle using radio waves (for example, millimeter waves) or light. The radar sensor includes, for example, a millimeter wave radar or a lidar [LIDAR: Light Detection and Ranging]. The radar sensor detects an obstacle by transmitting radio waves or light to the periphery of the vehicle and receiving radio waves or light reflected by the obstacle. The radar sensor transmits the detected obstacle information to the ECU 10. Obstacles include fixed obstacles such as guardrails and buildings, as well as moving obstacles such as pedestrians, bicycles, and other vehicles.

  The internal sensor 3 is a detection device that detects the traveling state of the host vehicle. The internal sensor 3 includes a vehicle speed sensor, an acceleration sensor, and a yaw rate sensor. The vehicle speed sensor is a detector that detects the speed of the host vehicle. As the vehicle speed sensor, for example, a wheel speed sensor that is provided for a wheel of the host vehicle or a drive shaft that rotates integrally with the wheel and detects the rotational speed of the wheel is used. The vehicle speed sensor transmits the detected vehicle speed information (wheel speed information) to the ECU 10.

  The acceleration sensor is a detector that detects the acceleration of the host vehicle. The acceleration sensor includes, for example, a longitudinal acceleration sensor that detects acceleration in the longitudinal direction of the host vehicle and a lateral acceleration sensor that detects lateral acceleration of the host vehicle. For example, the acceleration sensor transmits acceleration information of the host vehicle to the ECU 10. The yaw rate sensor is a detector that detects the yaw rate (rotational angular velocity) around the vertical axis of the center of gravity of the host vehicle. As the yaw rate sensor, for example, a gyro sensor can be used. The yaw rate sensor transmits the detected yaw rate information of the host vehicle to the ECU 10.

  The vehicle-side map database 4 is a database that stores map information. The vehicle-side map database 4 is formed in, for example, an HDD [Hard Disk Drive] mounted on the host vehicle. The map information includes road position information, road shape information (for example, curves, straight line types, curve curvature, etc.), intersection and branch point position information, and structure position information. The map information includes section information related to a section set in advance on the map. The section is used for setting communication parameters to be described later. The vehicle-side map database 4 may be stored in a server that can communicate with the host vehicle.

  The travel history database 5 is a database that stores the travel history of the host vehicle. The travel history is a history of positions on the map where the host vehicle has traveled in the past. The travel history database 5 may be stored in a server that can communicate with the host vehicle.

  The vehicle side communication unit 6 is a device for communicating with the communication server 60. The vehicle control device 50 transmits and receives various information with the communication server 60 through the vehicle-side communication unit 6. The communication format is not particularly limited.

  The vehicle side communication part 6 communicates with a communication server by the communication parameter set by ECU10. The communication parameter is a parameter related to communication. The communication parameters include an upload data upper limit (hereinafter referred to as UL) and a download data upper limit (hereinafter referred to as DL). A reference value (initial value) is defined for the communication parameter.

  The actuator 7 is a device used for controlling the host vehicle. The actuator 7 includes at least a throttle actuator, a brake actuator, and a steering actuator. The throttle actuator controls the amount of air supplied to the engine (throttle opening) in accordance with a control signal from the ECU 10 to control the driving force of the host vehicle. When the host vehicle is a hybrid vehicle, in addition to the amount of air supplied to the engine, a control signal from the ECU 10 is input to a motor as a power source to control the driving force. When the host vehicle is an electric vehicle, a control signal from the ECU 10 is input to a motor as a power source to control the driving force. The motor as the power source in these cases constitutes the actuator 7.

  The brake actuator controls the brake system according to a control signal from the ECU 10 and controls the braking force applied to the wheels of the host vehicle. As the brake system, for example, a hydraulic brake system can be used. The steering actuator controls driving of an assist motor that controls steering torque in the electric power steering system in accordance with a control signal from the ECU 10. Thereby, the steering actuator controls the steering torque of the host vehicle.

  Next, a functional configuration of the ECU 10 will be described. The ECU 10 includes a vehicle position recognition unit 11, a road condition recognition unit 12, a travel state recognition unit 13, a vehicle control unit 14, a travel frequency recognition unit 15, and a communication parameter update unit 16.

  The vehicle position recognition unit 11 recognizes the position of the host vehicle on the map based on the position information of the GPS reception unit 1 and the map information of the vehicle-side map database 4. The vehicle position recognizing unit 11 uses SLAM [Simultaneous Localization and Mapping] technology using position information of fixed obstacles such as utility poles and detection results of the external sensor 2 included in the map information of the vehicle-side map database 4. To recognize the position of the host vehicle. In addition, the vehicle position recognition unit 11 may recognize the position of the host vehicle on the map by a known method.

  The road situation recognition unit 12 recognizes the road situation of the road on which the host vehicle travels based on the detection result of the external sensor 2. The road situation includes the situation of obstacles on the road on which the host vehicle travels (situation of moving obstacles such as other vehicles, bicycles, and pedestrians, and fixed obstacles such as utility poles, guardrails, and buildings). The road situation recognition unit 12 recognizes the road situation by a known method based on the captured image of the camera and the obstacle information of the radar sensor.

  The traveling state recognition unit 13 recognizes the traveling state of the host vehicle based on the detection result of the internal sensor 3. The traveling state includes the vehicle speed of the host vehicle, the acceleration of the host vehicle, and the yaw rate of the host vehicle. Specifically, the traveling state recognition unit 13 recognizes the vehicle speed of the host vehicle based on the vehicle speed information of the vehicle speed sensor. The traveling state recognition unit 13 recognizes the acceleration of the host vehicle based on the vehicle speed information of the acceleration sensor. The traveling state recognition unit 13 recognizes the direction of the host vehicle based on the yaw rate information of the yaw rate sensor.

  The vehicle control unit 14 sets various information (communication result) acquired by communication of the vehicle side communication unit 6, road information recognized by the road condition recognition unit 12, and the traveling state of the host vehicle recognized by the traveling state recognition unit 13. Based on this, vehicle control of the host vehicle is performed. The various information acquired by communication includes, for example, road condition information (road condition information acquired by other vehicles) regarding the road condition of the section ahead of the host vehicle.

  When the driver sets a destination, the vehicle control unit 14 generates a route from the position on the map of the host vehicle (current position) to the destination. The vehicle control unit 14 performs vehicle control (automatic driving control, driving support control, driver guidance control, etc.) that causes the host vehicle to travel along the generated route. For example, the vehicle control unit 14 performs vehicle control of the host vehicle by transmitting a control signal to the actuator 7. The vehicle control unit 14 transmits the generated route information to the communication server 60.

  The travel frequency recognition unit 15 recognizes the travel frequency for each section preset on the map based on the travel history stored in the travel history database 5 and the map information (section information) in the vehicle-side map database 4. . The traveling frequency is, for example, the number of times the host vehicle has traveled in the section during a certain period (for example, one month). The traveling frequency recognition unit 15 may store the recognized traveling frequency for each section in the traveling history database 5.

  The communication parameter update unit 16 determines whether a communication parameter setting has been received from the communication server 60. When it is determined that the communication parameter setting is received from the communication server 60, the communication parameter update unit 16 determines whether the received communication parameter setting is different from the current communication parameter setting of the vehicle-side communication unit 6. . When the communication parameter update unit 16 determines that the received communication parameter setting is different from the current communication parameter setting of the vehicle side communication unit 6, the communication of the vehicle side communication unit 6 is set to the received communication parameter setting. Update parameters.

  Next, the communication server 60 will be described. The communication server 60 is provided in a facility such as a center that manages traffic information, for example, and communicates with a plurality of communication vehicles including the host vehicle. The communication vehicle is a vehicle having a function of communicating with the communication server 60. Communication vehicles generally have a function of recognizing a position of a vehicle on a map and a function of recognizing road conditions outside the vehicle. The communication server 60 provides road condition information acquired from a plurality of communication vehicles in response to a request from the vehicle control device 50 of the host vehicle.

  The communication server 60 is configured as a general computer including a CPU, a storage unit, and a communication control unit. The storage unit may be a ROM and / or a RAM, and may be a storage medium such as an HDD having a RAID (Redundant Arrays of Inexpensive Disks) configuration. The storage unit may be provided outside the communication server 60. The communication control unit is a communication device such as a network card that controls communication. Each function of the communication server 60 is realized by a combination of the operations of the hardware described above. The communication server 60 may be configured by a plurality of computers. The communication server 60 may be a cloud server. The communication server 60 is connected to a server side communication unit 8 for communicating with the host vehicle (vehicle control device 50). The server side communication unit 8 is, for example, a communication facility at a center where the communication server 60 is provided.

  The communication server 60 includes a server-side map database 61, a communication vehicle position recognition unit 62, a traffic volume information generation unit 63, a host vehicle information acquisition unit 64, and a communication parameter setting unit 65.

  The server-side map database 61 is a database that stores map information. The server-side map database 61 is a database serving as a reference for the vehicle-side map database 4, and the vehicle-side map database 4 is appropriately updated according to the contents of the server-side map database 61. The server-side map database 61 keeps the map information up-to-date using communication with a communication vehicle such as a probe car, for example. The server-side map database 61 stores section information related to sections set in advance on the map. The section may be formed by dividing the road for each intersection or branching point, or may be formed by dividing the road at certain distances. The method for forming the section is not particularly limited.

  The communication vehicle position recognition unit 62 recognizes the position of the communication vehicle on the map through communication with a plurality of communication vehicles. The communication vehicle position recognition unit 62 recognizes the position of the communication vehicle on the map by acquiring, for example, information (GPS information) on the map recognized by each communication vehicle from a plurality of communication vehicles. .

  The traffic volume information generation unit 63 generates traffic volume information related to the traffic volume for each section preset on the map, based on the position of the communication vehicle on the map recognized by the communication vehicle position recognition unit 62. The traffic volume in the section is, for example, the number of communication vehicles that travel per certain time in the section.

  The own vehicle information acquisition unit 64 acquires the own vehicle information through communication with the own vehicle (vehicle control device 50). The own vehicle information includes the traveling frequency for each section of the own vehicle recognized by the traveling frequency recognition unit 15. The own vehicle information may include the position of the own vehicle on the map.

  The communication parameter setting unit 65 sets communication parameters between the host vehicle and the communication server 60 based on the traffic volume information generated by the traffic volume information generation unit 63 and the host vehicle information acquired by the host vehicle information acquisition unit 64. .

  The communication parameter setting unit 65 recognizes a section for which communication parameters are set. When the communication parameter setting unit 65 acquires information on a route on which the host vehicle travels through communication with the host vehicle, the communication parameter setting unit 65 recognizes a section included in the route as a target section for setting communication parameters. The communication parameter setting unit 65 sets communication parameters in consideration of how the vehicle is used, based on the traffic volume in the target section and the traveling frequency of the host vehicle in the target section.

  Here, FIG. 2A is a plan view for explaining how the vehicle is used for each section. FIG. 2B is a table showing communication parameter settings according to the type of use of the car. FIG. 2A shows the host vehicle M, the center C, the routes A and B of the host vehicle, the section a, the section b, the communication vehicles N1 and N2, and the destination G. The center C is a facility where the communication server 60 is provided. The section a is a section included in the route A. In the section a, the communication vehicles N1 and N2 are traveling. A section b is a section included in the route B. The vehicle is not traveling in the section b.

  In the state shown in FIG. 2A, the section “a” is a section with a large traffic volume as a section feature (location feature) because the communication vehicles N1, N2, and the like are traveling. Section a is a section in which the traveling frequency of the host vehicle is high as a feature of the host vehicle. In this case, the communication parameter setting unit 65 sets communication parameters for UL reduction and DL reduction on the assumption that the usage of the vehicle in the section a corresponds to type 1 in the table of FIG.

  That is, in section a, since the communication vehicle 60 has a large traffic volume, it is less necessary for the communication server 60 to acquire information on the section a from the own vehicle, and the driver knows the road well because the own vehicle is also traveling frequently. Therefore, it is not necessary to acquire road condition information for section a. For this reason, the communication parameter setting unit 65 sets communication parameters between the host vehicle and the communication server 60 in the section a so that the UL is decreased from the reference value and the DL is decreased from the reference value.

  In section b, no communication vehicle is running, and the section has a low traffic volume as a feature of the section. The section b is a section where the traveling frequency of the host vehicle is low as a feature of the host vehicle. In this case, the communication parameter setting unit 65 sets communication parameters for UL increase and DL increase on the assumption that the usage of the vehicle in the section b corresponds to type 4 in the table of FIG.

  That is, in the section b, since the communication vehicle 60 has a small traffic volume, it is highly necessary for the communication server 60 to acquire the information of the section a from the own vehicle, and since the own vehicle also has a low driving frequency, the driver does not know the road well. There is a high need to acquire information on the road condition of the section b. For this reason, the communication parameter setting unit 65 sets communication parameters between the host vehicle and the communication server 60 in the section b so that the UL is increased from the reference value and the DL is increased from the reference value.

  In addition, the communication parameter setting unit 65 uses a reference value for a section where the traffic volume of the communication vehicle is large but the traveling frequency of the host vehicle is small (the way the car is used is the type 2 section in the table of FIG. 2B). Communication parameters are set so as to decrease UL and increase DL from the reference value.

  The communication parameter setting unit 65 sets the UL from the reference value for a section where the traffic volume of the communication vehicle is small but the traveling frequency of the host vehicle is large (the way the car is used is the type 3 section in the table of FIG. 2B). The communication parameter is set so as to increase and decrease DL from the reference value. The communication parameter setting unit 65 transmits the communication parameters of the target section to the host vehicle via the server side communication unit 8.

[Vehicle communication system processing]
Hereinafter, processing of the vehicle communication system 100 according to the present embodiment will be described.

<Traffic information generation processing>
FIG. 3 is a flowchart showing traffic information generation processing. The flowchart shown in FIG. 3 is executed in the communication server 60 at regular intervals (for example, every day).

  As shown in FIG. 3, the communication server 60 recognizes the position of the communication vehicle on the map by the communication vehicle position recognition unit 62 in S10. For example, the communication vehicle position recognition unit 62 collectively recognizes the position information of the map information of a plurality of communication vehicles received within a certain period. Thereafter, the communication server 60 proceeds to S12.

  In S <b> 12, the communication server 60 generates traffic information by the traffic information generation unit 63. The traffic volume information generation unit 63 generates traffic volume information related to the traffic volume for each section preset on the map, based on the position of the communication vehicle on the map recognized by the communication vehicle position recognition unit 62. Thereafter, the communication server 60 ends the current process.

<Communication parameter setting processing>
FIG. 4 is a flowchart showing communication parameter setting processing. The flowchart shown in FIG. 4 is executed, for example, when route information is transmitted from the host vehicle (vehicle control device 50).

  As shown in FIG. 4, the communication server 60 acquires host vehicle information by the host vehicle information acquisition unit 64 in S <b> 20. The own vehicle information acquisition unit 64 acquires own vehicle information including the traveling frequency for each section of the own vehicle recognized by the traveling frequency recognition unit 15. Thereafter, the communication server 60 proceeds to S22.

  In S <b> 22, the communication server 60 determines whether the traffic volume in the target section is equal to or greater than the traffic volume threshold by the communication parameter setting unit 65. The traffic volume threshold is a preset value. If it is determined that the traffic volume in the target section is equal to or greater than the traffic volume threshold (S22: YES), the communication server 60 proceeds to S24. If it is determined that the traffic volume in the target section is not equal to or greater than the traffic volume threshold value (S22: NO), the communication server 60 proceeds to S30.

  In S24, the communication server 60 determines whether or not the traveling frequency of the host vehicle in the target section is equal to or more than the traveling frequency threshold by the communication parameter setting unit 65. The travel frequency threshold is a preset value. If it is determined that the traveling frequency of the host vehicle in the target section is equal to or greater than the traveling frequency threshold (S24: YES), the communication server 60 proceeds to S26. If it is determined that the traveling frequency of the host vehicle in the target section is not equal to or greater than the traveling frequency threshold (S24: NO), the communication server 60 proceeds to S28.

  In S26, the communication server 60 sets communication parameters as UL decrease and DL decrease by the communication parameter setting unit 65. The communication parameter setting unit 65 communicates with the host vehicle in the target section so as to decrease UL from the reference value and decrease DL from the reference value, assuming that the usage of the vehicle in the target section corresponds to Type 1. Communication parameters with the server 60 are set. Thereafter, the communication server 60 proceeds to S36.

  In S28, the communication server 60 sets communication parameters as UL decrease and DL increase by the communication parameter setting unit 65. The communication parameter setting unit 65 communicates with the host vehicle in the target section so as to decrease the UL from the reference value and increase the DL from the reference value, assuming that the usage of the vehicle in the target section corresponds to Type 2. Communication parameters with the server 60 are set. Thereafter, the communication server 60 proceeds to S36.

  In S30, the communication server 60 determines whether or not the traveling frequency of the host vehicle in the target section is equal to or higher than the traveling frequency threshold by the communication parameter setting unit 65. If it is determined that the traveling frequency of the host vehicle in the target section is equal to or greater than the traveling frequency threshold (S30: YES), the communication server 60 proceeds to S32. If it is determined that the traveling frequency of the host vehicle in the target section is not equal to or greater than the traveling frequency threshold (S30: NO), the communication server 60 proceeds to S34.

  In S32, the communication server 60 sets communication parameters as UL increase and DL decrease by the communication parameter setting unit 65. The communication parameter setting unit 65 communicates with the host vehicle in the target section so as to increase the UL from the reference value and decrease the DL from the reference value, assuming that the usage of the vehicle in the target section corresponds to Type 3. Communication parameters with the server 60 are set. Thereafter, the communication server 60 proceeds to S36.

  In S34, the communication server 60 sets communication parameters as UL increase and DL increase by the communication parameter setting unit 65. The communication parameter setting unit 65 communicates with the host vehicle in the target section so as to increase the UL from the reference value and increase the DL from the reference value, assuming that the usage of the vehicle in the target section corresponds to type 4. Communication parameters with the server 60 are set. Thereafter, the communication server 60 proceeds to S36.

  In S36, the communication server 60 transmits the communication parameters set by the communication parameter setting unit 65 to the host vehicle (vehicle control device 50). Thereafter, the communication server 60 ends the current process.

<Communication parameter update processing>
FIG. 5 is a flowchart showing communication parameter update processing. The flowchart shown in FIG. 5 is executed when the vehicle control device 50 communicates with the communication server 60.

  As shown in FIG. 5, the ECU 10 of the vehicle control device 50 determines whether or not the communication parameter update unit 16 has received the communication parameter setting from the communication server 60 in S40. If it is not determined that the communication parameter setting has been received (S40: NO), the ECU 10 ends the current process. Thereafter, the ECU 10 repeats the process of S40 again after a predetermined time has elapsed. If it is determined that the communication parameter setting has been received (S40: YES), the ECU 10 proceeds to S42.

  In S <b> 42, the ECU 10 causes the communication parameter update unit 16 to determine whether or not the communication parameter setting received from the communication server 60 is different from the current communication parameter setting of the vehicle side communication unit 6. If the ECU 10 determines that the communication parameter setting is not different from the current communication parameter setting (S42: NO), the ECU 10 ends the current process. Thereafter, the ECU 10 repeats the process of S40 again after a predetermined time has elapsed. When it is determined that the communication parameter setting is different from the current communication parameter setting (S42: YES), the ECU 10 proceeds to S44.

  In S <b> 44, the ECU 10 updates the communication parameters of the vehicle side communication unit 6 by the communication parameter update unit 16. Thereafter, the ECU 10 ends the current process and repeats the process of S40 again after a predetermined time has elapsed.

[Operation effect of vehicle communication system]
According to the vehicle communication system 100 according to the present embodiment described above, communication parameters between the communication server 60 and the host vehicle are appropriately set in consideration of the traffic volume in the section on the map and the traveling frequency of the host vehicle in the section. Therefore, communication between the host vehicle and the communication server 60 can be realized in an appropriate manner. Thereby, according to the vehicle communication system 100, the increase in unnecessary communication volume can be suppressed, and the cost regarding communication can be optimized according to the necessity of the own vehicle and the communication server 60.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to embodiment mentioned above. The present invention can be implemented in various forms including various modifications and improvements based on the knowledge of those skilled in the art including the above-described embodiments.

  For example, the vehicle control unit 14 does not necessarily have to generate a route on which the host vehicle is to travel. The vehicle control unit 14 does not necessarily need to transmit route information to the communication server 60, and may transmit information on a target section for which communication parameter settings are to be set to the communication server 60. Even when the communication server 60 does not receive route information or target section information from the vehicle control device 50, the communication server 60 communicates with the section where the host vehicle travels next from the position on the map of the host vehicle as the target section. Parameters may be set.

  The vehicle-side map database 4 does not necessarily store section information, and the vehicle control device 50 may acquire necessary section information from the communication server 60. The vehicle-side map database 4 is not essential, and the vehicle control unit 14 may be configured to acquire necessary map information from the communication server 60.

  DESCRIPTION OF SYMBOLS 10 ... ECU, 11 ... Vehicle position recognition part, 12 ... Road condition recognition part, 13 ... Travel condition recognition part, 14 ... Vehicle control part, 15 ... Travel frequency recognition part, 16 ... Communication parameter update part, 50 ... Vehicle control apparatus , 60 ... communication server, 61 ... server side map database, 62 ... communication vehicle position recognition unit, 63 ... traffic volume information generation unit, 64 ... own vehicle information acquisition unit, 65 ... communication parameter setting unit, 100 ... vehicle communication system.

Claims (1)

A vehicle communication system comprising: a communication server that performs communication with a plurality of communication vehicles; and a vehicle control device that performs vehicle control of the host vehicle based on a communication result with the communication server,
The communication server is
A communication vehicle position recognition unit for recognizing positions on the map of the plurality of communication vehicles in communication by communication with the plurality of communication vehicles;
A traffic volume information generating unit that generates traffic volume information relating to traffic volume for each section preset on the map based on positions on the map of the plurality of communication vehicles in communication;
A host vehicle information acquisition unit that acquires host vehicle information including a travel frequency for each section of the host vehicle by communication with the host vehicle;
A communication parameter setting unit that sets communication parameters with the own vehicle for each section based on the traffic information and the own vehicle information;
The vehicle control device includes:
A vehicle position recognition unit for recognizing a position of the host vehicle on a map;
Based on the position of the host vehicle on the map, a travel history database that stores the travel history of the host vehicle;
Based on the travel history, a travel frequency recognition unit that recognizes a travel frequency for each section of the host vehicle,
A vehicle communication system comprising: a communication parameter updating unit that updates a communication parameter with the communication server based on a setting of the communication parameter setting unit of the communication server.

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