JP6305199B2 - Communication control device and communication control method - Google Patents

Description

  The present invention relates to communication control of an in-vehicle network.

  In recent years, ECUs (Electronic Control Units) mounted on vehicles are increasing. However, since the in-vehicle network has limited communication resources, it is necessary to control the amount of communication between the ECUs in accordance with the driving situation. Therefore, regarding communication control of the in-vehicle network, Patent Document 1 discloses a technique for controlling the communication amount for each vehicle situation for each network unit. Further, in Patent Document 2, when the risk level of a vehicle increases, instead of increasing the communication band of the rear camera, the communication band of a DVD (Digital Versatile Disc) player or a game machine is lowered, thereby appropriately securing the communication band. Technology to do is shown.

JP 2004-120221 A JP 2010-173366 A

  However, the technology of Patent Document 1 controls the communication amount in units of networks, and load adjustment of the amount of communication cannot be performed for each type of signal, that is, in units of communication that realize various functions.

  The technique of Patent Document 2 is intended to control communication whose traffic volume varies depending on in-vehicle conditions such as video data of a DVD player or a game machine. For periodic communication signals whose communication volume does not vary depending on in-vehicle conditions, It was not possible to adjust the load of the traffic volume.

  In view of the above-described problems, an object of the present invention is to provide a communication control device and a communication control method for controlling a communication cycle of a periodic communication signal in in-vehicle communication according to the risk level of a vehicle.

A first communication control device of the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device is a control target. The risk determination unit that determines the risk of the vehicle and the periodic communication are classified into a plurality of communication types including warning function control communication and vehicle control communication, and communication is performed based on the risk for each communication type. A communication cycle control unit for controlling the cycle , a position information acquisition unit for acquiring vehicle position information, and the vehicle position information are compared with a dangerous area database in which dangerous points or dangerous areas are registered, and A risk zone determination unit that determines whether the current travel point is a risk point or a risk zone, and the risk level determination unit determines the risk level of the vehicle based on the determination result of the risk zone determination unit. The
A second communication control device of the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device is a control target. The risk determination unit that determines the risk of the vehicle and the periodic communication are classified into a plurality of communication types including warning function control communication and vehicle control communication, and communication is performed based on the risk for each communication type. A communication cycle control unit that controls the cycle, and further includes a travel state determination unit that determines a travel state including at least one of the speed of the vehicle, the presence or absence of an obstacle or a person around the vehicle, and a risk determination unit Determines the risk level of the vehicle based on the running state.
A third communication control device according to the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device controls. The risk determination unit that determines the risk of the vehicle and the periodic communication are classified into a plurality of communication types including warning function control communication and vehicle control communication, and communication is performed based on the risk for each communication type. A communication cycle control unit that controls the cycle, and the communication cycle control unit shortens the communication cycle of the warning function control system communication and the vehicle control system communication as the degree of danger increases.
A fourth communication control device of the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device is a control target. Classifying the periodic communication into a plurality of communication types including the warning function control system communication and the vehicle control system communication, and for each communication type, A communication cycle control unit that controls a communication cycle based on the risk level, and the communication cycle control unit lengthens a communication cycle other than the warning function control system communication and the vehicle control system communication as the risk level is higher. .

The communication control method of the present invention is a communication control method for controlling periodic communication including warning function control system communication and vehicle control system communication in a communication network mounted on a vehicle, and determines the risk level of the vehicle. A risk determination step and a control step of classifying periodic communication into a plurality of communication types including warning function control system communication and vehicle control system communication, and controlling the communication cycle based on the risk level for each communication type; the provided control step, Ru step der to increase the communication cycle other than alerting the control system communication and a vehicle control system communications higher risk.

A first communication control device of the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device is a control target. The risk determination unit that determines the risk of the vehicle and the periodic communication are classified into a plurality of communication types including warning function control communication and vehicle control communication, and communication is performed based on the risk for each communication type. A communication cycle control unit for controlling the cycle , a position information acquisition unit for acquiring vehicle position information, and the vehicle position information are compared with a dangerous area database in which dangerous points or dangerous areas are registered, and A risk zone determination unit that determines whether the current travel point is a risk point or a risk zone, and the risk level determination unit determines the risk level of the vehicle based on the determination result of the risk zone determination unit. The Therefore, the communication cycle of the warning function control system communication related to safety can be controlled according to the risk level of the vehicle.
A second communication control device of the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device is a control target. The risk determination unit that determines the risk of the vehicle and the periodic communication are classified into a plurality of communication types including warning function control communication and vehicle control communication, and communication is performed based on the risk for each communication type. A communication cycle control unit that controls the cycle, and further includes a travel state determination unit that determines a travel state including at least one of the speed of the vehicle, the presence or absence of an obstacle or a person around the vehicle, and a risk determination unit Determines the risk level of the vehicle based on the running state. Therefore, the communication cycle of the warning function control system communication related to safety can be controlled according to the risk level of the vehicle.
A third communication control device according to the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device controls. The risk determination unit that determines the risk of the vehicle and the periodic communication are classified into a plurality of communication types including warning function control communication and vehicle control communication, and communication is performed based on the risk for each communication type. A communication cycle control unit that controls the cycle, and the communication cycle control unit shortens the communication cycle of the warning function control system communication and the vehicle control system communication as the degree of danger increases. Therefore, the communication cycle of the warning function control system communication related to safety can be controlled according to the risk level of the vehicle.
A fourth communication control device of the present invention is a communication control device that controls periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network, and the communication control device is a control target. Classifying the periodic communication into a plurality of communication types including the warning function control system communication and the vehicle control system communication, and for each communication type, A communication cycle control unit that controls a communication cycle based on the risk level, and the communication cycle control unit lengthens a communication cycle other than the warning function control system communication and the vehicle control system communication as the risk level is higher. . Therefore, the communication cycle of the warning function control system communication related to safety can be controlled according to the risk level of the vehicle.

The communication control method of the present invention is a communication control method for controlling periodic communication including warning function control system communication and vehicle control system communication in a communication network mounted on a vehicle, and determines the risk level of the vehicle. A risk determination step and a control step of classifying periodic communication into a plurality of communication types including warning function control system communication and vehicle control system communication, and controlling the communication cycle based on the risk level for each communication type; the provided control step, Ru step der to increase the communication cycle other than alerting the control system communication and a vehicle control system communications higher risk. Therefore, the communication cycle of the warning function control system communication related to safety can be controlled according to the risk level of the vehicle.

1 is a block diagram showing a configuration of a communication control apparatus according to Embodiment 1. FIG. It is a figure which shows the table used for the risk determination in a risk determination part. 3 is a block diagram illustrating a control target of the communication control apparatus according to Embodiment 1. FIG. 3 is a block diagram illustrating a control target of the communication control apparatus according to Embodiment 1. FIG. 3 is a flowchart showing an operation of the communication control apparatus according to the first embodiment.

<A. Embodiment 1>
<A-1. Configuration>
FIG. 1 is a block diagram showing a configuration of communication control apparatus 10 according to Embodiment 1 of the present invention. The communication control device 10 is a communication control device that is mounted on a moving body such as a vehicle and controls communication of the moving body. Hereinafter, the communication control apparatus 10 is demonstrated as what controls communication of a vehicle.

  The communication control device 10 includes a position information acquisition unit 11, a dangerous area determination unit 12, a vehicle information acquisition unit 13, a traveling state determination unit 14, a risk level determination unit 15, a communication cycle determination unit 16, a communication control unit 17, a map database ( DB) 21 and a dangerous area database (DB) 22.

  The position information acquisition unit 11 acquires position information of a vehicle on which the communication control device 10 is mounted. The position information of the vehicle is detected based on signals from various sensors of the vehicle such as a GPS (Global Positioning System) sensor, a wheel speed sensor, and an angular speed sensor. Here, the position information acquired by the external configuration of the communication control apparatus 10 will be described as a configuration in which the position information acquisition unit 11 acquires the position information. However, the position information acquisition unit 11 may be configured to detect the position information.

  The dangerous area determination unit 12 refers to the map DB 21 and the dangerous area DB 22 based on the vehicle position information acquired from the position information acquisition unit 11 and determines whether or not the current traveling position of the vehicle is a dangerous area. The map DB 21 and the dangerous area DB 22 are configured by a storage device such as a memory device using a semiconductor element or an HDD (Hard Disk Drive). The map DB 21 stores normal map data.

  The dangerous area DB 22 stores dangerous area information that is position information of the dangerous area. For example, an area where accidents frequently occurred in the past is indicated as a dangerous area. The dangerous area information may be information indicating a specific “point” as a dangerous point instead of information on a dangerous “area” having a certain range. In addition, taking into consideration that accident-prone points vary with time, the danger zone may vary with time. In that case, the dangerous area determination unit 12 determines the degree of risk in consideration of the current time. In FIG. 1, the map DB 21 and the dangerous area DB 22 are described as components of the communication control device 10, but the communication control device 10 may not have these databases, and these information is externally transmitted by communication. The configuration may be acquired from time to time.

  The vehicle information acquisition unit 13 acquires vehicle information necessary for the traveling state determination unit 14 to determine the traveling state of the vehicle. The vehicle information is information for identifying, for example, the traveling speed of the vehicle and the presence or absence of an oncoming vehicle or a following vehicle. As information for identifying the presence or absence of an oncoming vehicle or a following vehicle, for example, there is a photographed image of a camera installed in front of or behind the vehicle. Alternatively, it may be a measurement result of infrared radar, radio wave radar, or optical radar, and these information may be acquired by road-to-vehicle communication or vehicle-to-vehicle communication.

  The traveling state determination unit 14 determines the traveling state of the vehicle from the vehicle information acquired by the vehicle information acquisition unit 13. When the vehicle information acquisition unit 13 acquires the travel speed of the vehicle as the vehicle information, the travel state determination unit 14 determines whether the travel speed of the vehicle exceeds the legal speed. Here, the traveling state determination unit 14 acquires the current vehicle position information from the position information acquisition unit 11, and acquires the legal speed of the current traveling road with reference to the map DB 21 based on this. Further, when the vehicle information acquisition unit 13 acquires a captured image of a camera installed in front of or behind the vehicle as vehicle information, the presence or absence of an oncoming vehicle is determined from the captured image of the front camera by image processing, and the rear camera The presence or absence of the following vehicle is determined from the captured image.

  The risk level determination unit 15 determines the risk level of the vehicle based on the determination result by the danger area determination unit 12 and the determination result by the traveling state determination unit 14. Details of this determination method will be described later.

  The communication cycle determination unit 16 determines the communication cycle of the periodic communication signal in the in-vehicle network for each signal type based on the vehicle risk determined by the risk determination unit 15. In the initial state where the risk level of the vehicle is not determined, the communication cycle of the periodic communication signal is set to a predetermined cycle.

  The communication control unit 17 is a communication interface connected to the external ECU 30 via an in-vehicle network such as a CAN (Controller Area Network), and performs communication of various periodic communication signals according to a communication cycle determined by the communication cycle determination unit 16.

  Although the communication control device 10 has been described as being mounted on a mobile body such as a vehicle, a part of the configuration of the communication control device 10 shown in FIG. 1 includes a server, a PDA (Personal Digital Assistant), It may be realized by a portable terminal that can be brought into a vehicle such as a smartphone, or may be realized by a combination thereof. However, the communication control unit 17 needs to be mounted on the moving body.

<A-2. Risk assessment>
FIG. 2 shows a table used for risk determination by the risk determination unit 15. Here, a method of determining the degree of risk based on the determination result of the dangerous area determination unit 12 and the determination result of the traveling state determination unit 14 is shown. The items used for the determination are (1) whether the current travel area is a dangerous area (Y) (N), and (2) whether the travel speed of the vehicle exceeds the legal speed (Y) ( N), (3) whether there is an oncoming vehicle (Y) (N), and (4) whether there is a following vehicle (Y) (N). Among these four items, if all items are Y, the risk is determined as “high”, and if one or more items are Y and one or more items are N, the risk is determined as “medium”. If all items are N, the risk is determined to be “low”.

<A-3. Determination of communication cycle>
FIG. 3 shows a configuration of the external ECU 30 in which the communication control unit 17 of the communication control device 10 controls communication. The external ECU 30 includes a camera control unit 31, a vehicle speed sensor control unit 32, a seat control unit 33, a remote control control unit 34, and an air conditioner control unit 35. Each control unit is configured as a separate ECU. That is, the ECU is provided for each function. The communication cycle determining unit determines a communication cycle in the periodic communication with the external ECU 30 in the communication control unit 17 for each signal type. Periodic communication signals between the communication control unit 17 and the external ECU 30 are classified into signal types such as warning function control system signals, vehicle control system signals, and other signals.

  The warning function control system signal is a signal for realizing a function of detecting a dangerous situation of the vehicle and alerting the user among periodic communication signals in the in-vehicle network. For example, a communication signal for realizing a function of detecting an obstacle and generating a warning sound, or a communication signal for detecting a vehicle straddling a white line and realizing a function of generating a warning sound is applicable. In the external ECU 30 shown in FIG. 3, a communication signal with the camera control unit 31 is a warning function control system signal.

  The vehicle control system signal is a signal for performing control related to the behavior of the vehicle among the periodic communication signals in the in-vehicle network. For example, when the vehicle has a function of detecting an obstacle and automatically braking and stopping, a communication signal with the vehicle speed sensor control unit 32 or the brake control unit for realizing the function is received. It becomes a vehicle control system signal.

  In an initial state immediately after the vehicle starts traveling, the communication control unit 17 controls periodic communication of the warning function control system signal, the vehicle control system signal, and other signals according to a predetermined default communication period. However, if the risk determination unit 15 determines that the risk is “high”, the communication cycle of the warning function control system signal and the vehicle control system signal is made shorter than the default communication cycle, and the communication cycle of other signals is set to the default communication cycle. Make it longer than the communication cycle. Therefore, as shown in FIG. 4, the communication cycle for the camera control unit 31 and the vehicle speed sensor control unit 32 is shorter than the default communication cycle, and the communication cycle for the seat control unit 33, the remote control control unit 34, and the air conditioner control unit 35 is the default. Longer than the communication cycle. In FIG. 4, a thick arrow indicates that the communication cycle is short, and a dotted arrow indicates that the communication cycle is long.

  When the risk determination unit 15 determines that the risk is “medium”, the communication cycle of the warning function control system signal and the vehicle control system signal is made shorter than the default communication cycle, and the communication cycle of other signals is set to the default communication cycle. A communication cycle (not shown).

  When the risk determination unit 15 determines that the risk is “low”, the communication cycle of the warning function control system signal and the vehicle control system signal is set as the default communication cycle, and the communication cycle of other signals is set as the default communication cycle. Shorter (not shown).

  The communication control device 10 according to the present invention controls the communication cycle of in-vehicle communication for each signal type in accordance with the traveling state of the vehicle, so that sufficient performance can be exhibited for each function in accordance with the traveling state. In particular, if the danger level is high while the vehicle is running, that is, the risk of an accident is high, the warning function control system signal communication cycle is shortened and other signal communication cycles are lengthened, Performance can be improved. Specifically, it is possible to reduce the time from the detection of the dangerous situation until the warning process is performed, and the risk of occurrence of an accident can be reduced. Similarly, by shortening the communication cycle of the vehicle control system signal, it is possible to reduce the time required to brake the vehicle to avoid danger after detecting a dangerous situation, thereby reducing the risk of an accident occurring. I can do it.

<A-4. Flow chart>
FIG. 5 is a flowchart showing the operation of the communication control apparatus 10. When the vehicle to be controlled by the communication control device 10 starts traveling, periodic communication is started with a default setting period (step S1). At this time, the communication cycle determination unit 16 instructs the communication control unit 17 to perform various cycle communications at a default setting cycle.

  Next, the position information acquisition unit 11 acquires the current position information of the vehicle, and the vehicle information acquisition unit 13 acquires the vehicle information (step S2). Then, the dangerous area determination unit 12 determines whether the traveling area is a dangerous area based on the position information of the vehicle. Moreover, the traveling state determination part 14 determines a traveling state based on vehicle information (step S3).

  Next, the risk determination unit 15 determines the risk (step S4). As described in detail above, the degree of risk of the vehicle is determined based on whether or not the traveling area is a dangerous area or based on the determination of the traveling state.

  Thereafter, the communication cycle determination unit 16 sets a communication cycle of periodic communication for each communication type based on the risk of the vehicle (step S5). According to the communication cycle set here, the communication control unit 17 controls the communication cycle of the external ECU 30 to perform communication control according to the risk level of the vehicle.

  Next, it is determined whether or not the vehicle has stopped traveling (step S6). If the vehicle has not stopped traveling, the process returns to step S2, and if the vehicle has stopped traveling, the process ends.

<A-5. Effect>
The communication control device 10 is a communication control device that controls periodic communication including warning function control system communication in an in-vehicle communication network, and a risk determination for determining a risk level of a vehicle to be controlled by the communication control device. And a communication cycle determining unit 16 (communication cycle control unit) that classifies the periodic communication into a plurality of communication types including warning function control system communication and controls the communication cycle based on the risk level for each communication type. And comprising. Therefore, for example, when the danger level is high while the vehicle is running, that is, when the danger of an accident is high, by shortening the communication cycle of the warning function control system signal until the warning process is performed after detecting the dangerous situation Time can be shortened, and the risk of accidents can be reduced.

  The periodic communication in which the communication cycle determining unit 16 controls the communication cycle includes vehicle control system communication. For example, when the risk of accident occurrence is high, by shortening the communication cycle of the vehicle control system signal, it is possible to reduce the time to brake the vehicle to avoid the danger after detecting the dangerous situation, The risk of accidents can be reduced.

  In addition, the communication control device 10 collates the position information acquisition unit 11 that acquires the position information of the vehicle, the position information of the vehicle with the dangerous area or the dangerous area database in which the dangerous area is registered, and the current traveling point of the vehicle And a danger area determination unit 12 that determines whether or not is a danger point or a danger area. And the danger level determination part 15 determines the danger level of a vehicle based on the determination result of a danger area determination part. This makes it possible to determine the degree of risk according to the travel location of the vehicle.

  The communication control device 10 further includes a traveling state determination unit 14 that determines a traveling state that includes at least one of the speed of the vehicle and the presence or absence of an obstacle or a person around the vehicle. The risk level of the vehicle is determined based on the state. Thereby, it becomes possible to determine the degree of risk according to the running state of the vehicle.

  In addition, the communication cycle determination unit 16 can shorten the time from detection of the dangerous situation to warning processing by shortening the communication cycle of the warning function control system communication as the degree of danger is higher. The risk of occurrence can be reduced.

  Further, the communication cycle determining unit 16 can secure communication resources for the warning function control system communication by increasing the communication cycle other than the warning function control system communication as the risk level is higher.

  Further, the communication cycle determining unit 16 can secure communication resources for the warning function control system communication by increasing the communication cycle other than the warning function control system communication and the vehicle control system communication as the risk level is higher. .

  The communication control method of the present invention is a communication control method for controlling periodic communication including warning function control system communication in a communication network mounted on a vehicle, the step of determining the risk of the vehicle, And classifying the communication into a plurality of communication types including warning function control system communication, and controlling the communication cycle based on the degree of risk for each communication type. Therefore, for example, when the danger level is high while the vehicle is running, that is, when the danger of an accident is high, by shortening the communication cycle of the warning function control system signal until the warning process is performed after detecting the dangerous situation Time can be shortened, and the risk of accidents can be reduced.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  DESCRIPTION OF SYMBOLS 10 Communication control apparatus, 11 Position information acquisition part, 12 Hazardous area judgment part, 13 Vehicle information acquisition part, 14 Running state judgment part, 15 Risk level judgment part, 16 Communication cycle determination part, 17 Communication control part, 21 Map database ( DB), 22 Hazardous area database (DB), 30 External ECU, 31 Camera control unit, 32 Vehicle speed sensor control unit, 33 Seat control unit, 34 Remote control unit, 35 Air conditioner control unit.

Claims (5)

A communication control device for controlling periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network,
A risk determination unit that determines the risk of a vehicle to be controlled by the communication control device;
A communication cycle control unit that classifies the periodic communication into a plurality of communication types including the warning function control system communication and the vehicle control system communication, and controls a communication cycle based on the risk for each communication type; , Bei to give a,
A position information acquisition unit for acquiring position information of the vehicle;
A danger area determination unit that compares the position information of the vehicle with a danger area database in which a danger point or a danger area is registered, and determines whether the current travel point of the vehicle is a danger point or a danger area; Further comprising
The risk determination unit determines a risk level of the vehicle based on the determination result of the danger zone determination unit;
Communication control device. A communication control device for controlling periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network,
A risk determination unit that determines the risk of a vehicle to be controlled by the communication control device;
A communication cycle control unit that classifies the periodic communication into a plurality of communication types including the warning function control system communication and the vehicle control system communication, and controls a communication cycle based on the risk for each communication type; With
A traveling state determination unit for determining a traveling state including at least one of the speed of the vehicle, the presence or absence of an obstacle or a person around the vehicle,
The risk determination unit determines the risk of the vehicle based on the running state;
Communication control device. A communication control device for controlling periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network,
A risk determination unit that determines the risk of a vehicle to be controlled by the communication control device;
A communication cycle control unit that classifies the periodic communication into a plurality of communication types including the warning function control system communication and the vehicle control system communication, and controls a communication cycle based on the risk for each communication type; With
The communication cycle control unit shortens the communication cycle of the warning function control system communication and the vehicle control system communication as the risk level is higher.
Communication control device. A communication control device for controlling periodic communication including warning function control system communication and vehicle control system communication in an in-vehicle communication network,
A risk determination unit that determines the risk of a vehicle to be controlled by the communication control device;
A communication cycle control unit that classifies the periodic communication into a plurality of communication types including the warning function control system communication and the vehicle control system communication, and controls a communication cycle based on the risk for each communication type; With
The communication cycle control unit lengthens a communication cycle other than the warning function control system communication and the vehicle control system communication as the risk level is higher.
Communication control device. A communication control method for controlling periodic communication including warning function control system communication and vehicle control system communication in a communication network mounted on a vehicle,
A risk determination step of determining the risk of the vehicle;
The periodic communication is classified into a plurality of communication types including the warning function control system communication and the vehicle control system communication, and a control step of controlling a communication cycle based on the risk for each communication type, Bei example,
Wherein the control step, Ru step der to increase the communication period other than the higher risk the warning function control system communication and the vehicle control system communications,
Communication control method.

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