JP2018180783A - Drive support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a drive support function work correctly.SOLUTION: There are provided: an inter-vehicle communication part 12 for receiving vehicle information on another vehicle using inter-vehicle communication; a drive support part 19 for supporting driving of a driver by giving attention to presence of an approaching vehicle, based on the received information on the other vehicle; and a determination part for determining whether or not a communication failure is generated by a third person's vehicle different from the other vehicle, when the communication failure is generated in the inter-vehicle communication with the other vehicle. The inter-vehicle communication part 12 receives the vehicle information on the other vehicle via the third person's vehicle, when it is determined that the communication failure is generated by the third person's vehicle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a driving support device.

  Patent Document 1 below discloses a driving support system that warns of the presence of an approaching vehicle based on position information of another vehicle received using inter-vehicle communication. This driving support system shortens the transmission period of position information by inter-vehicle communication when communication failure occurs due to the presence of a shield or the like.

JP, 2009-276845, A

  However, in the driving support system of Patent Document 1, even when the transmission period of position information by inter-vehicle communication is shortened, inter-vehicle communication can not be performed unless the communication failure is resolved. Therefore, in such a case, the driving support function for alerting the presence of the approaching vehicle can not be properly operated.

  Then, an object of the present invention is to provide a driving support device capable of causing the driving support function to work properly.

  The driving assistance apparatus according to an aspect of the present invention warns of the presence of the approaching vehicle based on the inter-vehicle communication unit that receives the vehicle information of the other vehicle using inter-vehicle communication, and the received vehicle information of the other vehicle. In the case where a communication failure occurs in the inter-vehicle communication with the other vehicle by the driving support unit that assists the driver's driving by awakening, the communication failure is caused by the third party vehicle different from the other vehicle The inter-vehicle communication unit is configured to determine the vehicle information of the other vehicle when it is determined that the communication failure is caused by the third party vehicle; Receive via a third party vehicle.

  According to the present invention, it is possible to provide a driving support device capable of causing the driving support function to work properly.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which illustrates schematic structure of the driving assistance system containing the driving assistance device which concerns on embodiment. It is a schematic diagram for demonstrating the communication condition of the vehicle-to-vehicle communication in, when a building exists between the own vehicle and another vehicle. It is a schematic diagram for demonstrating the communication condition of the inter-vehicle communication in, when the third party vehicle exists between the own vehicle and another vehicle. It is a schematic diagram for demonstrating a communication interception area. It is a flowchart for demonstrating an example of operation | movement of the driving assistance system shown in FIG. It is a flowchart for demonstrating an example of the process sequence of the communication shield type determination process shown in FIG.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, what attached the same code | symbol in each figure has the same or same structure.

  The configuration of a driving support system including the driving support device according to the embodiment will be described with reference to FIG. The driving support system 1 includes, for example, a host vehicle information acquisition unit 11, an inter-vehicle communication unit 12, a communication failure determination unit 13, a communication obstacle type determination unit 14, another vehicle arrival prediction unit 15, and a third party via availability determination unit 16. , A collision determination unit 17, a support necessity determination unit 18, and a driving support unit 19.

  Among these components included in the driving support system 1, at least the inter-vehicle communication unit 12, the communication shield type determining unit 14, and the driving support unit 19 constitute a driving support device according to the present embodiment. In addition, the component of a driving assistance device is not limited to this, Arbitrary components can be added suitably as needed.

  The host vehicle information acquisition unit 11 acquires vehicle information of the host vehicle using, for example, various sensors such as a gyro sensor, an acceleration sensor, a geomagnetic sensor, and a GPS (Global Positioning System) receiver. The vehicle information of the host vehicle includes, for example, the position, the speed, the acceleration, the direction, and the like of the host vehicle.

  The inter-vehicle communication unit 12 performs bi-directional wireless communication with another vehicle to acquire vehicle information of the other vehicle. The vehicle information of the other vehicle includes, for example, the position, speed, acceleration, direction, and the like of the other vehicle.

  Here, the other vehicle is, for example, a vehicle traveling on a road that intersects the traveling path of the own vehicle at the intersection based on the intersection to which the own vehicle is heading. In addition, a vehicle traveling on a different lane of the traveling path of the host vehicle is referred to as a third-party vehicle.

  The communication failure determination unit 13 determines whether or not a communication failure such as communication with another vehicle is interrupted, based on, for example, vehicle information of the other vehicle. For example, the communication failure determination unit 13 determines success or failure of reception of vehicle information of another vehicle, presence or absence of packet loss, congestion state in inter-vehicle communication, vehicle based on information on wireless communication with another vehicle by inter-vehicle communication. The usage rate or the like of the communication band in inter-vehicle communication is determined or calculated, and based on the determination result and / or the calculation result, it is determined whether or not a failure occurs in communication with another vehicle.

  Here, in inter-vehicle communication, as a situation in which a failure occurs in communication with another vehicle, for example, a stationary object such as a building or a third-party vehicle traveling in parallel with the own vehicle It is possible that there exists between.

  FIG. 2 is a diagram illustrating a case where a building S exists between the host vehicle X and the other vehicle A heading for the common intersection J. In this case, the wireless communication between the own vehicle X and the other vehicle A may be interrupted by the building S.

  FIG. 3 is a diagram illustrating a case where a third-party vehicle B running parallel to the host vehicle X is present between the host vehicle X and the other vehicle A heading for the common intersection J. In this case, the wireless communication between the host vehicle X and the other vehicle A may be interrupted by the third party vehicle B.

  The driving support system 1 according to the embodiment, when communication failure such as communication interruption occurs in the communication between the own vehicle and the other vehicle, according to the type of the communication shield causing the communication failure, By adding a device such as switching the procedure for acquiring the vehicle information of the vehicle, the driving support function for alerting the driver of the presence of the approaching vehicle is properly used. The specific content of the above device will be described below.

  Communication shield type determination unit 14 shown in FIG. 1 is based on, for example, the vehicle information of the own vehicle, the vehicle information of the other vehicle, the determination result by communication failure determination unit 13, etc. A communication shield type determination process is performed to determine the type. A specific processing procedure of the communication shield type determination process will be described below.

  First, the communication shield type determination unit 14 determines whether communication is established with the communication shield, and when communication is not established, the type of the communication shield is set to be other than the communicable vehicle.

  On the other hand, when communication with the communication shield is established, the communication shield type determination unit 14 acquires vehicle information of the communication shield via the inter-vehicle communication unit 12, and the communication shield will be described later. It is determined whether it exists in the communication blocking area.

  Subsequently, the communication shield type determination unit 14 sets the type of the communication shield as the communicable vehicle when the communication shield is present in the communication blocked area, while the communication shield does not exist in the communication blocked area. In this case, the type of the communication shield is other than the communicable vehicle.

  The communication blocking area will be described with reference to FIG.

  The communication blocking area R is an area for determination set between the host vehicle X and the other vehicle A that are in communication between vehicles. Specifically, the communication blocking area R is formed by a rectangular area having a line connecting the center point Xc of the host vehicle X and the center point Az of the other vehicle A as a center line. Illustratively, the communication blocking area R is determined by arbitrarily setting the half length Rw of the short side of the rectangle and the half length Rl of the long side of the rectangle. Rc shown in the communication blocking area R is a central point of the rectangle.

  In the example of FIG. 4, when the center point Bc of the communicable vehicle B exists in the communication blocking area R, the communication shield type determination unit 14 sets the type of the communication shield as the communicable vehicle, but can communicate. When the center point Bc of the vehicle B does not exist in the communication blocking area R, the type of the communication blocking object is set to other than the communicable vehicle.

  It returns to the explanation of FIG. The other vehicle arrival prediction unit 15 shown in the figure is based on, for example, the vehicle information of the other vehicle, the determination result by the communication failure determination unit 13, etc., the other vehicle at the common intersection where both the own vehicle and the other vehicle are heading Calculate (predict) the time it takes to arrive.

  The third party via possibility determination unit 16 passes the vehicle information of the other vehicle via the communicable vehicle based on, for example, the vehicle information of the other vehicle and the type of the communication shield determined by the communication shield type determination unit 14 or the like. To determine if it can be acquired.

  The collision determination unit 17 compares the own vehicle with the other vehicle based on, for example, vehicle information of the own vehicle, vehicle information of the other vehicle, a time when the other vehicle reaches the intersection, and a determination result by the third party availability determination unit 16. Determines whether the vehicle collides at an intersection.

  The support necessity determination unit 18 determines whether to support driving based on, for example, the determination result by the collision determination unit 17 or the like. Specifically, when the collision determination unit 17 determines that the host vehicle and another vehicle collide at an intersection, the support necessity determination unit 18 determines that driving support is to be performed. On the other hand, when the collision determination unit 17 determines that the host vehicle and the other vehicle do not collide at an intersection, the support necessity determination unit 18 determines that driving assistance is not performed.

  The driving support unit 19 executes the driver support function by alerting the driver of the presence of the approaching vehicle when it is determined that the driving support is to be performed by the support necessity determination unit 18. The driver may be alerted by, for example, displaying a message indicating the presence of the approaching vehicle on the display, or outputting a voice message indicating the presence of the approaching vehicle from the speaker or the like. It is also good.

  Next, with reference to FIG. 5, an example of the operation of the driving support system including the driving support device according to the embodiment will be described.

  First, the inter-vehicle communication unit 12 determines whether communication is established with another vehicle (step S101). If this determination is NO (step S101; NO), this operation ends.

  If it is determined that communication with another vehicle is established in the determination of step S101 (step S101; YES), the inter-vehicle communication unit 12 acquires vehicle information of the other vehicle (step S102).

  Subsequently, the communication failure determination unit 13 determines whether a failure has occurred in communication with the other vehicle based on the vehicle information of the other vehicle acquired in step S102 (step S103). If it is determined that a failure has not occurred in communication with another vehicle (step S103; NO), the process proceeds to step S108 described later.

  When it is determined that a failure has occurred in communication with another vehicle in the determination of step S103 (step S103; YES), the communication shield type determination unit 14 executes a communication shield type determination process ((step S103) Step S104). The processing procedure of this communication shield type determination processing will be described later.

  Subsequently, the other vehicle arrival prediction unit 15 determines whether the type of the communication shield is a communicable vehicle (step S105). If this determination is NO (step S105; NO), the process proceeds to step S110 described later.

  If it is determined that the type of the communication shield is a communicable vehicle in the determination of step S105 (step S105; YES), the other vehicle arrival prediction unit 15 can acquire vehicle information of the communicable vehicle of the other vehicle It is determined whether or not (step S106). If this determination is NO (step S106; NO), the other vehicle arrival prediction unit 15 uses the vehicle information of the other vehicle acquired from the other vehicle before the communication failure with the other vehicle occurs. It is determined whether the own vehicle and another vehicle collide (step S110). Then, the process proceeds to step S108 described later.

  On the other hand, when it is determined that the communicable vehicle can acquire vehicle information of the other vehicle in the determination of step S106 (step S106; YES), the other vehicle arrival prediction unit 15 acquires the communicable vehicle via the communicable vehicle. It is determined whether the own vehicle and the other vehicle collide using the vehicle information of the other vehicle (step S107).

  Subsequently, the support necessity determination unit 18 determines whether to perform driving support based on the collision determination result in step S107 or step S110 (step S108). When this determination is NO (step S108; NO), the driving support unit 19 does not call the driver's attention, that is, does not perform driving support (step S111). Then, the operation ends.

  If it is determined that the driving support is to be performed in the determination of step S108 (step S108; YES), the driving support unit 19 calls the driver's attention, that is, performs the driving support (step S109). Then, the operation ends.

  Next, with reference to FIG. 6, the processing procedure of the communication shield type determination process executed in step S104 of FIG. 5 will be described.

  First, the communication shield type determination unit 14 determines whether communication with the communication shield causing the communication failure is established (step S201). If this determination is NO (step S201; NO), the communication shield type determination unit 14 determines that the type of communication shield is other than the communicable vehicle (step S205), and ends the communication shield type determination process.

  If it is determined that communication with the communication shield is established in the determination of step S201 (step S201; YES), the communication shield type determination unit 14 determines the vehicle information of the communication shield via the inter-vehicle communication unit 12 Are acquired (step S202).

  Subsequently, the communication shield type determination unit 14 determines whether a communication shield exists in the communication blocking area (step S203). When this determination is NO (step S203; NO), the communication shield type determination unit 14 sets the type of the communication shield to other than the communicable vehicle (step S205), and ends the communication shield type determination process.

  On the other hand, when it is determined that the communication shield is present in the communication blocking area in the determination of step S203 (step S203; YES), the communication shield type determination unit 14 sets the type of the communication shield as the communicable vehicle. (Step S204), the shield type determination process ends.

  As described above, according to the driving support system 1 in the embodiment, it is possible to execute the driving support function that calls attention to the presence of the approaching vehicle based on the vehicle information of the other vehicle received using the inter-vehicle communication. In addition, when a communication failure occurs in inter-vehicle communication with another vehicle, it is determined whether the communication failure is caused by a third-party vehicle different from the other vehicle, and the communication failure is a third-party vehicle When it is determined that the vehicle has been generated, the vehicle information of the other vehicle can be received via the third party vehicle.

  Thus, even when communication failure occurs in inter-vehicle communication with another vehicle, the vehicle information of the other vehicle can be received via the third party vehicle, and thus the received vehicle information of the other vehicle It is possible to execute a driving support function that warns of the presence of an approaching vehicle on the basis of.

  Therefore, according to the driving support system 1 in the embodiment, it is possible to properly operate the driving support function.

[Modification]
The present invention is not limited to the above-described embodiment, and can be implemented in other various forms without departing from the scope of the present invention. For this reason, the said embodiment is only a mere illustration in all the points, and is not interpreted restrictively. For example, the processing steps described above can be arbitrarily changed in order or performed in parallel as long as no contradiction occurs in the processing content.

  In the embodiment described above, the communication shield type determination process is executed when a failure occurs in communication with another vehicle, but it is not essential to execute the communication shield type determination process. For example, when the traveling path of the vehicle is a single lane, or when the traveling path of the vehicle is a plurality of lanes and the vehicle is traveling in a lane closest to another vehicle among a plurality of lanes, etc. When a failure occurs in communication with another vehicle, the process may proceed according to the same procedure as in the case where the type of the communication shield is other than the communicable vehicle without executing the communication shield type determination process. Good.

DESCRIPTION OF SYMBOLS 1 ... driving assistance system, 11 ... own vehicle information acquisition part, 12 ... inter-vehicle communication part, 13 ... communication failure determination part, 14 ... communication shielding type determination part, 15 ... other vehicle arrival prediction part, 16 ... third party Via possibility determination unit, 17 ... collision determination unit, 18 ... support necessity determination unit, 19 ... driving support unit

Claims (1)

An inter-vehicle communication unit that receives vehicle information of another vehicle using inter-vehicle communication;
A driving support unit that supports the driver's driving by alerting the presence of an approaching vehicle based on the received vehicle information of the other vehicle;
A determining unit that determines whether a communication failure has occurred due to a third-party vehicle different from the other vehicle when a communication failure occurs in inter-vehicle communication with the other vehicle;
Equipped with
The inter-vehicle communication unit receives vehicle information of the other vehicle via the third party vehicle when it is determined that the communication failure is caused by the third party vehicle.
Driving support device.

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