JP6617667B2 - Communication apparatus and communication system - Google Patents

Description

  The present disclosure relates to a technique for performing wireless communication.

  Conventionally, a technique for performing communication using a communication apparatus that performs wireless communication is known. Patent Document 1 discloses a technique for establishing communication with a center as a predetermined communication partner and performing communication with the communication partner when the communication is successfully established. .

JP-A-10-336746

  By the way, when such a communication device is mounted on a vehicle, there is a situation where establishment of communication with a communication partner fails due to geographical conditions, surrounding conditions, weather, and the like while the vehicle is running. sell. The technique described in Patent Document 1 has a problem that it is impossible to know a communication state such as when the establishment of communication with a communication partner succeeds or fails while the vehicle is traveling.

  The present disclosure provides a technique capable of knowing a communication state during traveling of a vehicle.

  The communication device (11) of the present disclosure is mounted on the vehicle (100) and performs wireless communication. The communication device includes a position acquisition unit (112, S15), a communication determination unit (112, S40), and a recording instruction unit (112, S50, S70).

  The position acquisition unit acquires a vehicle position indicating the position of the vehicle. The communication determination unit determines whether or not the communication unit 21 that performs communication with a predetermined communication partner has succeeded in communication with the communication partner. The recording instruction unit causes the recording unit to record communication information based on the determination result by the communication determination unit and the determination position indicating the vehicle position when the determination by the communication determination unit is performed.

  According to such a configuration, since the communication information based on the determination result indicating whether the communication with the communication partner is successful and the position at that time is recorded, based on the recorded information It is possible to know the state of communication such as when communication with the communication partner succeeds or fails while the vehicle is traveling.

  Note that the reference numerals in parentheses described in this column and in the claims indicate the correspondence with the specific means described in the embodiment described later as one aspect, and the technical scope of the present disclosure It is not limited.

The block diagram which shows the structure of a communication system. The block diagram which shows the function of the control unit in the service base station of 1st Embodiment. The block diagram which shows the function of the control part in the vehicle-mounted apparatus of 1st Embodiment. The flowchart of the vehicle communication process of 1st Embodiment. The figure explaining a predetermined area | region and an update distance. The flowchart of the recording process which a control unit performs. The flowchart of the vehicle communication process of a modification. The block diagram which shows the function of the control unit in the service base station of 2nd Embodiment. The flowchart of the instruction | indication process which the control unit of 2nd Embodiment performs. The flowchart of the instruction | indication process of a modification.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
A communication system 1 to which the present disclosure shown in FIG. 1 is applied performs wireless communication between an in-vehicle device 10 mounted on a vehicle such as a passenger car and a service base station 90 installed at an arbitrary position. It is a configured system. Hereinafter, the vehicle 100 on which the in-vehicle device 10 is mounted is also referred to as a host vehicle.

  The communication system 1 includes an in-vehicle device 10 and a service base station 90. The in-vehicle device 10 and the service base station 90 are configured to be able to communicate with each other while the vehicle 100 is traveling via the mobile phone base station 80 and the Internet network 85. The communication system 1 may include one in-vehicle device 10 or a plurality of in-vehicle devices 10.

[Service base station]
The service base station 90 includes a control unit 91, a wireless communication device 94, and a communication quality database (hereinafter, communication quality DB) 95. The service base station 90 has a function as a known server that transmits and receives data to and from the in-vehicle device 10 by wireless communication.

The wireless communication device 94 performs wireless communication with the communication unit 21 of the in-vehicle device 10.
Communication information described later can be recorded in the communication quality DB 95. In addition to the communication information, the data recorded in the communication quality DB 95 is displayed on the display 312 of the vehicle 100 such as data indicating the vehicle speed when the vehicle 100 performs automatic driving, a map image, or the like. Various types of control executed by the in-vehicle device 10 such as data indicating an image to be performed, that is, data required in an application may be included.

  The control unit 91 is configured around a known microcomputer including a CPU 92, a memory 93 such as a ROM and a RAM. As shown in FIG. 2, the control unit 91 includes a recording unit 911 and a response unit 912 as functions configured by the CPU 92 executing a program recorded in the ROM.

  The recording unit 911 writes the data received from the in-vehicle device 10 to the communication quality DB 95. The received data here may include communication information described later. In response to a request from the in-vehicle device 10, the response unit 912 reads data from the communication quality DB 95 and transmits the data to the in-vehicle device 10. The data to be read here can include communication information. Moreover, the data required in the various control which the vehicle-mounted apparatus 10 performs can be included.

  The method of realizing these elements constituting the control unit 91 is not limited to software, and some or all of the elements may be realized using one or a plurality of hardware. For example, when the above function is realized by an electronic circuit that is hardware, the electronic circuit may be realized by a digital circuit including a large number of logic circuits, an analog circuit, or a combination thereof.

[In-vehicle device]
Returning to FIG. The in-vehicle device 10 includes a control unit 11, a communication unit 21, and a GPS receiver 22. The in-vehicle device 10 may include a camera 23, a vehicle speed sensor 24, a map database (hereinafter referred to as map DB) 25, and a temperature sensor 26.

The communication unit 21 is a well-known communication device that exchanges information using radio waves with a predetermined device outside the vehicle 100 such as the service base station 90.
The GPS receiver 22 is a known device that detects a vehicle position based on radio waves transmitted from GPS satellites. The vehicle position indicates the position of the vehicle 100. GPS indicates a global positioning system.

The camera 23 images the surroundings of the vehicle 100 and outputs image data indicating the captured image to the control unit 11.
The vehicle speed sensor 24 is a known sensor that detects the traveling speed of the vehicle 100.

  The map database (hereinafter referred to as map DB) 25 is a database that stores known road data 251 in which latitude / longitude on the earth and road data are associated with each other. In addition to data indicating the road on which the vehicle is traveling, the road data 251 includes, for example, shielding information indicating whether or not there is a shielding object around the road, and the terrain around the road such as a mountainous or plain area May be included. Here, the shielding object refers to an object that shields radio waves, such as a high-rise building.

The temperature sensor 26 is a well-known sensor that detects the temperature outside the vehicle 100 (hereinafter, the outside temperature).
The vehicle control execution unit 31 operates an engine, a brake, a steering, and the like of the host vehicle in accordance with a signal from the control unit 11. Further, the vehicle control execution unit 31 outputs a sound from the speaker 311 or displays an image on the display 312 according to a signal from the control unit 11.

  The control unit 11 is mainly configured by a known microcomputer having a CPU 12 and a semiconductor memory (hereinafter, memory 13) such as a RAM, a ROM, and a flash memory. Various functions of the control unit 11 are realized by the CPU 12 executing a program stored in a non-transitional physical recording medium. In this example, the memory 13 corresponds to a non-transitional tangible recording medium that stores a program. The non-transitional tangible recording medium means to remove electromagnetic waves from the recording medium. Further, by executing this program, a method corresponding to the program is executed. The number of microcomputers constituting the control unit 11 may be one or more.

As shown in FIG. 3, the control unit 11 includes a detection unit 111 and a vehicle communication unit 112 as a functional configuration realized by the CPU 12 executing the program.
The detection unit 111 detects a communication state when the communication unit 21 in the in-vehicle device 10 determines whether or not the communication with the service base station 90 is successful.

  The communication status represents a situation around the vehicle 100 that affects the success or failure of communication between the in-vehicle device 10 and the service base station 90. The communication status includes, for example, weather such as outside temperature and rainfall, the number of other vehicles around the vehicle 100, that is, within a predetermined range from the vehicle 100, the terrain at the vehicle position, and the presence or absence of shielding at the vehicle position. Etc. may be included.

In the present embodiment, the detection unit 111 detects the temperature outside the vehicle 100 acquired by the temperature sensor 26 as the communication status.
However, it is not limited to this. For example, the detection unit 111 may detect a situation around the vehicle 100 such as the number of other vehicles around the vehicle 100 as the communication situation using the camera 23. Although not shown, the detection unit 111 may detect the situation around the vehicle 100 using a radar device such as a laser radar instead of the camera 23. In addition, the detection unit 111 uses the vehicle position detected by the GPS receiver 22 and the road data 251 to determine whether the vehicle position is, for example, a mountainous area or an area with a lot of shielding. The geographical condition in may be detected as the communication status.

  The vehicle communication unit 112 determines whether or not the communication unit 21 in the in-vehicle device 10 has successfully communicated with the service base station 90, and records communication information based on the determination result in the memory 13. Moreover, the vehicle communication part 112 makes the vehicle control execution part 31 perform success control, when the communication part 21 succeeds in communication with the service base station 90. FIG. Success control will be described later.

  The technique for realizing these functions in the control unit 11 is not limited to software, and some or all of the elements may be realized using hardware that combines a logic circuit, an analog circuit, and the like.

[1-2. processing]
[1-2-1. Processing in vehicle equipment]
Next, vehicle communication processing executed by the control unit 11 in the in-vehicle device 10, specifically, the vehicle communication unit 112, will be described with reference to the flowchart of FIG. 4.

  The vehicle communication process is a process for determining whether or not the communication between the communication unit 21 and the service base station 90 is successful and recording the communication information in the memory 13. Communication information here refers to information based on the determination result of whether or not the communication unit 21 has successfully communicated with the service base station 90 and the determination position. The determination position indicates the vehicle position when it is determined whether or not the communication with the service base station 90 is successful.

  In this vehicle communication process, as shown in FIG. 5, while the vehicle 100 travels within a predetermined area, each time the vehicle 100 travels a predetermined update distance, the determination result and the determination position are used as communication information. To be recorded. The update distance can include a value of about 1 m to 100 m, for example. The update distance is recorded in the memory 13 in advance.

  The predetermined area represents one area among one or a plurality of areas divided for each predetermined size including the road on which the vehicle 100 travels. In the present embodiment, the predetermined area corresponds to a so-called mesh area that is divided for each predetermined size on a map as shown in FIG. Note that the present invention is not limited to this, and the predetermined area may include an area indicating a road that is divided at predetermined distances on the map.

The length of the road included in the predetermined area is set longer than the update distance described above. That is, communication information for one or more times is recorded in the predetermined area.
In this vehicle communication process, while the vehicle 100 travels within a predetermined area, the ratio of success and failure of communication between the communication unit 21 and the service base station 90 in the predetermined area is calculated.

The vehicle communication process is a process that is started when the power of the vehicle 100 is turned on, for example, and then repeatedly executed.
Specifically, in the vehicle communication process, the control unit 11 performs initialization in S10 as shown in FIG. Here, initialization means setting variables used in the vehicle communication process, such as the number of determinations, the number of failures, the failure rate, the number of successes, and the success rate, to 0 as initial values. These variables are recorded in the memory 13.

  In subsequent S15, the control unit 11 acquires the vehicle position detected by the GPS receiver 22. In the present embodiment, each time the vehicle control process is executed, the vehicle position is acquired in this step, and it is determined whether or not the communication between the communication unit 21 and the service base station 90 is successful in S40 described later. doing. That is, the vehicle position is acquired in S15 corresponding to the timing at which it is determined whether or not the communication with the service base station 90 is successful.

  Note that the control unit 11 may not be configured to acquire the vehicle position in S15 of the vehicle communication process, and may be configured to acquire the vehicle position for each predetermined period in a process different from the vehicle communication process. . In this case, the vehicle position acquired immediately before the timing at which the determination is made in S40 of the vehicle communication process may be used as the determination position.

  In subsequent S20, the control unit 11 acquires the communication status from the detection unit 111. In the present embodiment, the outside air temperature detected by the temperature sensor 26 is acquired as the communication status. In the present embodiment, after the communication status is acquired in S20, it is configured to determine whether or not the communication with the service base station 90 is successful in S40 described later. That is, the communication status acquired in this step corresponds to the communication status acquired from the detection unit 111 when it is determined whether or not the communication with the service base station 90 is successful.

  In S25, the control unit 11 determines whether the vehicle 100 has traveled the update distance. The control unit 11 shifts the process to S30 when the vehicle 100 travels the update distance, and waits until the vehicle 100 travels the update distance when the vehicle 100 does not travel the update distance.

  In subsequent S <b> 30, the control unit 11 performs communication for confirming communication success / failure indicating whether communication with the service base station 90 is successful. Specifically, the control unit 11 causes the communication unit 21 to transmit data specifying the service base station 90 as a communication partner.

  In subsequent S35, the control unit 11 acquires the number of determinations. In the present embodiment, every time communication for confirming the success or failure of communication is performed in S30, it is determined whether or not communication with the service base station 90 is successful in S40 described later. . In addition, the number of times of determination is configured such that when it is determined in S90, which will be described later, that the vehicle 100 has moved from the same predetermined area to the outside of the predetermined area, the vehicle communication process is terminated and reinitialized. Yes.

  That is, the number of times of judgment here is whether or not the communication between the communication unit 21 and the service base station 90 is successful in the predetermined area while the vehicle 100 is located in the same predetermined area. Indicates the number of times the decision was made.

  In subsequent S <b> 40, the control unit 11 determines whether or not the communication unit 21 has successfully communicated with the service base station 90. Specifically, the control unit 11 sends a response (hereinafter referred to as a normal reception response) indicating that the service base station 90 has successfully received the communication for confirming the success or failure transmitted in S30 to the service base station 90. Is received, it is determined that the communication with the serving base station 90 is successful.

  In addition, when the control unit 11 determines whether communication with the service base station 90 is successful in this step, when the response different from the expectation is received from the service base station 90, the control unit 11 performs communication with the service base station 90. You may judge that it failed. The response different from the expectation means a response other than the normal reception response. The control unit 11 may determine that communication with the service base station 90 has failed when a normal reception response cannot be received from the service base station 90 even after a predetermined time has elapsed.

  In the present embodiment, the control unit 11 performs service at this step every time the vehicle 100 travels the update distance while it is determined that the vehicle 100 is located in the same predetermined area in S90 described later. It is configured to repeatedly determine whether or not communication with the base station 90 is successful.

The control unit 11 shifts the process to S65 when the communication unit 21 determines that the communication with the service base station 90 is successful, and shifts the process to S45 when determining that the communication unit 21 has failed.
In S45 that is shifted when it is determined that communication with the service base station 90 has failed, the control unit 11 records the vehicle position acquired in S15 in the memory 13 as the determination position.

  In subsequent S50, the control unit 11 records the communication information in the memory 13. In this step, the control unit 11 indicates a determination result indicating that the communication unit 21 has failed to communicate with the service base station 90 and a vehicle position when the communication unit 21 has failed to communicate with the service base station 90. Information associating the determination position with the communication status when the communication unit 21 fails to communicate with the service base station 90 is recorded as communication information.

  In the present embodiment, in this step, the control unit 11 is configured to record communication information in the memory 13 every time it is determined whether or not the communication with the service base station 90 is successful in S40. Yes.

  In subsequent S55, the control unit 11 increases the number of failures by 1, and records the number of failures in the memory 13. The number of failures is determined that the communication unit 21 has failed to communicate with the service base station 90 in S40 while it is determined in S90 described later that the vehicle 100 is located in the same predetermined area. Indicates the number of times

  In subsequent S60, the control unit 11 calculates a failure rate. The failure ratio indicates the ratio of the number of failures to the number of determinations. After calculating the failure rate, the control unit 11 shifts the process to S90.

In S65 that is shifted when it is determined that the communication with the service base station 90 is successful, the control unit 11 records the vehicle position acquired in S15 in the memory 13 as the determination position.
In the subsequent S70, the control unit 11 records the communication information in the memory 13. In this step, the control unit 11 indicates a determination result indicating that the communication unit 21 has successfully communicated with the service base station 90, and a vehicle position when the communication unit 21 has successfully communicated with the service base station 90. Information associating the determination position with the communication status when the communication unit 21 succeeds in communication with the service base station 90 is recorded as communication information.

  In the present embodiment, in this step, the control unit 11 is configured to record communication information in the memory 13 every time it is determined whether or not the communication with the service base station 90 is successful in S40. Yes.

  In subsequent S <b> 75, the control unit 11 increases the success count by 1 and records the success count in the memory 13. The success count is determined that the communication unit 21 has succeeded in communication with the service base station 90 in S40 while it is determined in S90 described later that the vehicle 100 is located in the same predetermined area. Indicates the number of times

  In subsequent S80, the control unit 11 calculates a success rate. The success ratio indicates the ratio of the number of successes to the number of determinations. After calculating the success rate, the control unit 11 shifts the process to S85.

  In subsequent S85, the control unit 11 outputs an instruction for causing the vehicle control execution unit 31 to perform the success control. Success control indicates control performed using communication with the service base station 90. As described above, the service base station 90 is configured to read data from the communication quality DB 95 and transmit it to the in-vehicle device 10 in response to a request from the in-vehicle device 10.

  Success control may include, for example, automatic driving control that causes the vehicle 100 to travel at the speed according to information indicating the speed transmitted from the service base station 90 in response to a request from the control unit 11. The success control includes, for example, control for receiving data indicating an image such as a map transmitted from the service base station 90 in response to a request from the control unit 11 and displaying an image based on the data on the display 312. May be included.

  However, the success control is not limited to these, and may include control related to various applications performed using communication with the service base station 90 in the in-vehicle device 10. The control unit 11 is configured not to output an instruction for causing the vehicle control execution unit 31 to perform success control when it is determined that the communication unit 21 has failed to communicate with the service base station 90. Yes.

The control unit 11 shifts the process to S90 after outputting an instruction to the vehicle control execution unit 31.
In S90, the control unit 11 determines whether or not the vehicle 100 is located in the same predetermined area based on the vehicle position acquired in S15. Here, when the vehicle 100 is located in the same predetermined area, the control unit 11 shifts the process to S15 and repeats the processes after S15. On the other hand, when the vehicle 100 is located outside the predetermined region from the same predetermined region, the control unit 11 shifts the process to S95.

  In S95, the control unit 11 causes the memory 13 to record information associating the success / failure ratio with the predetermined area as communication information. The success / failure ratio indicates the ratio of the success / failure count to the determination count. The success / failure count indicates the number of successful or unsuccessful communication with the service base station 90 by the communication unit 21 among the determination counts when the determination count is acquired.

  In this step, the control unit 11 causes the memory 13 to record information associating the failure rate with the predetermined area as communication information, with the number of failures as a success / failure number. Or the control part 11 records the information which matched the success rate and the predetermined area | region in the memory 13 as communication information by making the frequency | count of success the success frequency.

  In subsequent S99, the control unit 11 causes the service base station 90 to wirelessly transmit information that associates the predetermined area with the success / failure ratio to the communication unit 21. And the control part 11 complete | finishes this vehicle communication process.

[1-2-2. Processing at the service base station]
Next, recording processing executed by the recording unit 911 of the control unit 91 in the service base station 90 will be described with reference to the flowchart of FIG. The recording process is a process that is repeatedly executed while the service base station 90 is powered on, for example.

  In S110, the control unit 91 determines whether or not the communication information transmitted from the communication unit 21 of the in-vehicle device 10 has been acquired. The control unit 91 shifts the process to S120 when communication information is acquired from the in-vehicle device 10, and ends the recording process when it is not acquired.

In S120, the control unit 91 records the acquired communication information in the communication quality DB 95, and ends the recording process.
In the present embodiment, the control unit 91 is configured to acquire communication information that associates a predetermined area with a success / failure ratio in the area from the in-vehicle device 10 and records the communication information in the communication quality DB 95 for each predetermined area. The control unit 91 can be configured to record the acquired communication information in the communication quality DB 95 together with the date and time when the communication information is received, information for identifying the in-vehicle device 10 that is the transmission source of the communication information, and the like.

[1-3. effect]
According to the first embodiment described in detail above, the following effects are obtained.
(1a) In the in-vehicle device 10, the control unit 11 acquires a vehicle position indicating the position of the vehicle. Further, the control unit 11 determines whether or not the communication unit 21 that performs communication with a predetermined service base station 90 has succeeded in communication with the service base station 90. Then, the control unit 11 causes the memory 13 to record communication information based on the determination result and the determination position indicating the vehicle position when the determination is performed.

  According to this, since the communication information based on the determination result indicating whether or not the communication with the service base station 90 is successful and the vehicle position at that time is recorded, it is based on the recorded communication information. Thus, for example, it is possible to know the state of communication such as when communication with the service base station 90 succeeds or fails at an arbitrary timing such as when the vehicle is traveling or when the vehicle is stopped.

(1b) In the in-vehicle device 10, the control unit 11 may acquire the vehicle position every time it determines whether or not the communication with the service base station 90 is successful.
According to this, since the structure which acquires a vehicle position whenever the control part 11 makes a judgment is provided, a judgment position can be recorded accurately.

  (1c) In the in-vehicle device 10, the control unit 11 determines that the communication unit 21 has failed to communicate with the service base station 90 and the communication unit 21 has failed to communicate with the service base station 90. Information in which the determination position is associated may be recorded as communication information.

  According to this, since the control part 11 is equipped with the structure which records the judgment result which shows that communication failed, and the vehicle position at that time, communication fails at arbitrary timings, for example, at the time of the driving | running | working of the vehicle 100 or a stop, for example. You can know the position.

  (1d) In the in-vehicle device 10, the control unit 11 determines that the communication unit 21 has successfully communicated with the service base station 90 and the communication unit 21 has successfully communicated with the service base station 90. Information in which the determination position is associated may be recorded as communication information.

  According to this, since the control part 11 is equipped with the structure which records the judgment result which shows that communication was successful, and the vehicle position at that time, communication succeeds at arbitrary timings, for example, at the time of driving | running | working of a vehicle 100, or a stop, for example You can know the position.

  (1e) In the in-vehicle device 10, the control unit 11 repeatedly determines whether or not the host vehicle has traveled an update distance that represents a predetermined distance after the communication information is recorded in the memory 13. Good. Further, the control unit 11 may determine whether or not the communication with the service base station 90 has been successful every time it is determined that the host vehicle has traveled the update distance after the communication information is recorded. The control unit 11 may record the communication information in the memory 13 every time it determines whether or not the communication with the service base station 90 is successful.

  According to this, since the communication information is recorded every time the vehicle 100 travels a predetermined update distance, the communication information is recorded, for example, rather than the configuration in which the communication information is recorded every predetermined time. Can be suppressed.

  (1f) In the in-vehicle device 10, when the control unit 11 determines whether or not the communication with the service base station 90 is successful, the communication state represents a situation around the vehicle that affects the success or failure of the communication. The communication status may be acquired from the detection unit 111 that detects the error. And the control part 11 may record the information which matched the judgment result, the judgment position, and the communication condition as communication information.

  According to this, since it has the structure which matches and records the success or failure of communication, the vehicle position at that time, and the communication status at that time, it can know the communication status where communication succeeds or fails. .

  (1g) In the in-vehicle device 10, the control unit 11 may be configured to repeatedly determine whether or not the communication with the service base station 90 is successful. The control unit 11 may be configured to record information associating the determination result with the determination position as communication information every time it is determined whether or not the communication with the service base station 90 is successful. Good.

  In addition, the control unit 11 makes a communication determination within a predetermined area representing one area among one or a plurality of areas divided by a predetermined size including a road on which the vehicle travels at a predetermined timing. You may acquire the judgment frequency | count which shows the frequency | count which the part performed judgment. In addition, when the number of determinations is acquired, the control unit 11 acquires a success / failure number indicating the number of times the communication unit 21 has successfully or failed to communicate with the service base station 90 among the determination times, A success / failure ratio indicating the ratio may be calculated.

Then, the control unit 11 may record information in which the success / failure ratio is associated with the predetermined area in the memory 13 as communication information.
According to this, since it has the structure which records the communication information which matched the ratio with which the communication with the service base station 90 succeeded or failed, and the predetermined area | region when this ratio was calculated, it was recorded. Based on the communication information, it is possible to know an area where communication with the service base station 90 is likely to succeed or fail at any timing such as when the vehicle 100 is traveling or stopped.

  (1h) In the in-vehicle device 10, the control unit 11 acquires, as the success / failure number, the number of times the communication unit 21 has failed to communicate with the service base station 90 when the determination number is acquired. You may calculate the failure ratio which shows the ratio of the frequency | count of failure with respect to. Moreover, the control part 11 may record the information which matched the failure ratio and the predetermined area | region in the memory 13 as communication information.

According to this, since it has the structure which records the communication information which matched the failure rate and the predetermined area | region, the area | region where communication with the service base station 90 tends to fail can be known.
(1i) In the in-vehicle device 10, when the determination count is acquired, the control unit 11 acquires, as the success / failure count, the number of successful communication with the service base station 90 by the communication unit 21 among the determination counts. You may calculate the success ratio which shows the ratio of the frequency | count of success with respect to. Then, the control unit 11 may record information in which the success rate is associated with the predetermined area in the memory 13 as communication information.

According to this, since it has the structure which records the communication information which matched the success rate and the predetermined area | region, the area | region where communication with the service base station 90 is easy to succeed can be known.
(1j) The communication system 1 is the in-vehicle device 10 described in the above (1a) to (1j), and is wireless between one or a plurality of in-vehicle devices 10 mounted on the vehicle and the in-vehicle device 10. And a service base station 90 that performs communication. The service base station 90 is a communication partner with which the communication unit 21 communicates. In the service base station 90, the control unit 91 acquires the communication information transmitted from the communication unit 21, and stores the acquired communication information in the communication quality DB 95 that stores the communication information.

  According to this, since the communication system 1 including the in-vehicle device 10 and the service base station 90 has a configuration for storing the communication information transmitted from the in-vehicle device 10 in the communication quality DB 95 in the service base station 90, the service base station 90, communication information collected by the in-vehicle device 10 can be stored.

[1-4. Modified example]
(Modification 1) The control unit 11 uses, as communication information, information in which a determination result on whether communication between the communication unit 21 and the service base station 90 is successful, a determination position, and a communication status are associated with each other. Only information may be recorded in the memory 13.

  In this case, for example, as shown in FIG. 7, the vehicle communication process may be configured to delete S10, S35, S55-S60, and S75-S95 from the flowchart shown in FIG. 4 and to include S96 instead of S99. . In S <b> 96, even if communication information is transmitted to the service base station 90 as information associating the determination result as to whether communication between the communication unit 21 and the service base station 90 is successful, the determination position, and the communication status. Good.

  In addition, in the vehicle communication process, the control unit 11 is information that associates the determination result that the communication unit 21 and the service base station 90 have successfully communicated, the determination position, and the communication status, or that the communication has been successful. Only one of the information in which the determination result, the determination position, and the communication status are associated with each other may be recorded in the memory 13. That is, in the vehicle communication process, either S50 or S70 may be deleted.

  In this case, in S96, the control unit 11 transmits to the service base station 90, as communication information, information associating one of the determination results regarding whether or not the communication is successful, the determination position, and the communication status. It may be configured.

In the service base station 90, the control unit 91 may be configured to record the communication information transmitted from the control unit 11 of the in-vehicle device 10 in the communication quality DB 95.
(Modification 2) In S50 or S70, the control unit 11 excludes the communication status, the determination result indicating that the communication unit 21 has succeeded or failed in communication with the service base station 90, the determination position, It may be configured to record information associating only with the memory 13 as communication information.

  (Modification 3) The control part 11 may be comprised so that a vehicle communication process may be repeatedly performed with a predetermined period. In this case, S25 may be deleted from the flowchart of the vehicle communication process. Thereby, it is determined whether or not the communication between the communication unit 21 and the service base station 90 has succeeded at a predetermined cycle, and the communication information is recorded.

  In this case, the control unit 11 may be configured to execute the vehicle communication process when the vehicle speed acquired from the vehicle speed sensor 24 is greater than or equal to a predetermined magnitude. This is to prevent the determination whether the communication with the service base station 90 is successful and the recording of the communication information from being repeated at the same position while the vehicle 100 is stopped.

  (Modification 4) The control unit 11 is configured to calculate either a success rate or a failure rate in a predetermined area, and to record information associating the predetermined area with the calculated ratio in the memory 13 as communication information. May be. In this case, S45-S60 or S65-S85 may be deleted from the flowchart of the vehicle communication process.

  (Modification 5) In the vehicle communication process, the control unit 11 is configured to travel outside the predetermined area from a predetermined area while the vehicle 100 is traveling, specifically, at a predetermined timing. At this timing, the memory 13 is finally configured to record communication information in which a success rate or failure rate in a certain predetermined area is associated with a certain predetermined area.

  However, the present invention is not limited to this, and the control unit 11 communicates communication information that associates the success rate or the failure rate in the predetermined region with the predetermined region at an arbitrary timing after traveling in the predetermined region. May be recorded in the memory 13. For example, the communication information may be recorded in the memory 13 when the vehicle 100 stops after traveling in a predetermined area.

  In this case, the control unit 11 acquires communication information in which the determination result recorded in the memory 13 is associated with the determination position, and specifies the determination position included in a predetermined area based on the communication information. The success / failure ratio may be calculated using the number of determination positions as the number of determinations and the number of successes or failures indicated by the determination results corresponding to the determination positions as the number of successes or failures. Then, the control unit 11 may be configured to record information associating the calculated success / failure ratio with a predetermined area in the memory 13 as communication information and transmit the information to the service base station 90.

[2. Second Embodiment]
[2-1. Difference from the first embodiment]
Since the basic configuration of the second embodiment is the same as that of the first embodiment, differences will be described below. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is referred to.

  In the second embodiment, as illustrated in FIG. 8, the control unit 91 in the service base station 90 reads data from the communication quality DB 95 and transmits an instruction according to the position of the in-vehicle device 10 to the in-vehicle device 10. This is different from the first embodiment in that it further includes 913.

  Specifically, in the control unit 91, the instruction unit 913 transmits an instruction to stop the success control to the in-vehicle device 10 when the vehicle 100 in which the in-vehicle device 10 is mounted is located within the failure prediction range. It is configured to The failure prediction range is a range set based on communication information stored in the communication quality DB 95, and represents a range that is a predetermined distance away from a position where communication with the service base station 90 has failed. .

  In addition, with this difference, in the in-vehicle device 10 in the present embodiment, the control unit 11 acquires the vehicle position and the traveling direction of the vehicle 100 in which the in-vehicle device 10 is mounted for each predetermined transmission cycle. The communication unit 21 is configured to wirelessly transmit information indicating the vehicle position and the traveling direction to the service base station 90. The control unit 11 can be configured to identify the traveling direction of the vehicle 100 based on a change in the vehicle position with time.

[2-2. processing]
Next, the instruction process executed by the instruction unit 913 in the control unit 91 of the second embodiment will be described with reference to the flowchart of FIG. The instruction process is a process that is repeatedly executed while the service base station 90 is powered on, for example.

  In S210, the control unit 91 acquires the vehicle position of the vehicle 100 and the traveling direction of the vehicle 100. In the present embodiment, the control unit 91 acquires the vehicle position and the traveling direction of the vehicle 100. However, the present invention is not limited to this, and the control unit 91 can be configured to acquire the vehicle position and the traveling direction of the vehicle 100 using, for example, roadside infrastructure or the like.

  In S220, the control unit 91 acquires the communication information recorded in the communication quality DB 95. In this embodiment, it is assumed that at least a determination result indicating that communication with the service base station 90 has failed and a determination position are recorded in the communication quality DB 95 as communication information.

  In S230, the control unit 91 is based on the vehicle position and traveling direction of the vehicle 100 acquired in S210 and the determination position when communication failed recorded in the communication information acquired in S220. Then, it is determined whether or not the vehicle position is included in the failure prediction range.

  Note that the control unit 91 may be configured to acquire prediction information. The prediction information represents information indicating whether or not the vehicle position acquired in S210 is included in the failure prediction range.

  For example, the control unit 91 determines whether the vehicle position acquired in S210 is included in the failure prediction range in a process different from the instruction process executed by the control unit 91, and the determination result is used as prediction information. It may be configured to obtain. Or control unit 91 may be constituted so that prediction information may be acquired from other vehicles, roadside infrastructure, etc.

The control unit 91 shifts the process to S250 when the vehicle position is included in the failure prediction range, and ends the instruction process when it is not included.
In S250, when the prediction information indicates that the vehicle position is included in the failure prediction range, the control unit 91 transmits an instruction to cause the control unit 11 of the in-vehicle device 10 to stop the success control by wireless communication. Then, the control unit 91 ends this instruction process.

[2-3. effect]
According to the second embodiment described in detail above, the effects (1a) to (1j) of the first embodiment described above are exhibited, and the following effects are further achieved.

  (2a) In the in-vehicle device 10, the control unit 11 communicates with the service base station 90 to the vehicle control execution unit 31 that controls the vehicle 100 when determining that the communication with the wireless recording device is successful. The success control indicating the control performed using is performed.

  In the service base station 90, the control unit 91 is a range set based on communication information stored in the communication quality DB 95, and is a predetermined distance from a position where communication with the service base station 90 has failed. Prediction information indicating whether or not the vehicle position is included in a failure prediction range indicating a remote range is acquired.

  In addition, when the prediction information indicates that the vehicle position is included in the failure prediction range, the control unit 91 transmits an instruction to cause the control unit 11 of the in-vehicle device 10 to stop the success control by wireless communication.

  According to this, when the vehicle 100 on which the in-vehicle device 10 is mounted is within the failure prediction range indicating the predetermined range including the failure position, the service base station 90 determines that the in-vehicle device 10 Since the configuration for stopping the control using the communication with the station 90 is provided, the in-vehicle device 10 can be prepared for the failure of the communication with the service base station 90.

[2-4. Modified example]
(Modification 6) As shown in FIG. 10, in the in-vehicle device 10, in S <b> 210, the control unit 11 sends to the service base station 90 information indicating control that is being executed or scheduled to be executed, that is, an application, along with the vehicle position and traveling direction. It may be configured to transmit.

  In this case, when the control unit 91 determines that the vehicle position is included in the failure prediction range in S230, the vehicle position may be included in the failure prediction range in S240. It may be configured to determine whether the application is affected. The control unit 91 may be configured to shift the process to S250 when the application is affected and to terminate the instruction process when the application is not affected.

  Here, even when the control unit 91 is configured to determine that the application of the vehicle position within the failure prediction range affects the application when the application executed in the in-vehicle device 10 is the success control. Good. Thereby, according to an application, the vehicle-mounted apparatus 10 can be prepared for communication with the service base station 90 failing.

  (Modification 7) In the in-vehicle device 10, the control unit 11 is configured to output an instruction to stop the success control to the vehicle control execution unit 31 when receiving an instruction to stop the success control from the service base station 90. May be. In addition, after outputting an instruction to stop the success control to the vehicle control execution unit 31, the control unit 11 outputs, to the speaker 311 or the display 312, data indicating audio or data indicating an image indicating that the success control is stopped. You may be comprised so that it may make.

[3. Other Embodiments]
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, and can carry out various modifications.

  (3a) Using the camera 23, the detection unit 111 may detect, for example, a situation around the vehicle 100 such as the number of other vehicles around the vehicle 100 as a communication situation. The in-vehicle device 10 may include a radar device such as a laser radar, and the detection unit 111 may be configured to detect a situation around the vehicle 100 detected by the radar device as a communication status. .

  In addition, the detection unit 111 uses the vehicle position detected by the GPS receiver 22 and the road data 251, for example, whether it is a mountainous area, the presence / absence of a shield that shields radio waves such as a high-rise building, and the like. Such a geographical condition at the vehicle position may be detected as the communication status.

  (3b) A plurality of functions of one constituent element in the above embodiment may be realized by a plurality of constituent elements, or a single function of one constituent element may be realized by a plurality of constituent elements. . Further, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. Further, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

  (3c) In addition to the communication system 1, the in-vehicle device 10, the control unit 11, the service base station 90, and the control unit 91 described above, a program for causing the control unit 11 or the control unit 91 to function, a semiconductor memory storing the program, and the like The present disclosure can also be realized in various forms such as a non-transitional actual recording medium and a communication method.

[4. Correspondence between Embodiment and Claims]
The control unit 11 and the CPU 12 correspond to a communication device, and the memory 13 corresponds to a recording unit.
S15 corresponds to processing as a position acquisition unit, S40 corresponds to processing as a communication determination unit, S50, S70, and S95 correspond to processing as a recording instruction unit, and S25 corresponds to processing as a distance determination unit. S20 corresponds to processing as a status acquisition unit. Further, S35 corresponds to the processing as the determination number acquisition unit, S60 and S80 correspond to the processing as the ratio calculation unit, S85 corresponds to the processing as the control command unit, and S99 corresponds to the processing as the transmission instruction unit. Equivalent to.

  The control unit 91 corresponds to a wireless recording device, and the communication quality DB 95 corresponds to a storage unit. Further, S120 corresponds to processing as a storage instruction unit, S230 corresponds to processing as a prediction acquisition unit, and S250 corresponds to processing as a stop transmission unit.

  DESCRIPTION OF SYMBOLS 1 Communication system, 11 Control part, 13 Memory, 21 Communication part, 91 Control unit, 95 Communication quality DB, 100 Vehicle, 111 Detection part, 112 Vehicle communication part.

Claims (15)

A communication device (11) that is mounted on a vehicle (100) and performs wireless communication,
A position acquisition unit (112, S15) for acquiring a vehicle position indicating a position of the vehicle on a road on which the vehicle travels ;
A communication determination unit (112, S40) for determining whether or not a communication unit that communicates with a predetermined communication partner has succeeded in communication with the communication partner;
Recording commander (112, S50 to record the communication information, based on the determination position indicating the vehicle position when the determination by the result and the communication determination unit determines by the communication determination section is performed in the recording unit (13), S70, S95),
A communication device comprising:   The communication device according to claim 1,
  When the communication determination unit determines that the communication with the communication partner is successful, the control unit that performs control of the vehicle is successful in controlling the vehicle using communication with the communication partner. Control command unit configured to perform control (S85)
  A communication device further comprising:   The communication device according to claim 2,
  The control command unit is configured to perform automatic driving control as control of the vehicle performed using communication with the communication partner.
  Communications system. The communication device according to any one of claims 1 to 3 ,
The position acquisition unit is a communication device configured to acquire the vehicle position every time the communication determination unit makes a determination. A communications device according to any one of claims 1 to 4,
The recording instruction unit (112, S50) determines a determination result indicating that the communication unit has failed in communication with the communication partner, and a determination position when the communication unit has failed in communication with the communication partner. A communication device configured to record the associated information as the communication information. The communication device according to any one of claims 1 to 5 ,
The recording instruction unit (112, S70) displays a determination result indicating that the communication unit has successfully communicated with the communication partner, and a determination position when the communication unit has successfully communicated with the communication partner. A communication device configured to record the associated information as the communication information. The communication device according to any one of claims 1 to 6 ,
A distance determination unit (112, S25) configured to repeatedly determine whether or not the host vehicle has traveled an update distance that represents a predetermined distance after the communication information is recorded in the recording unit.
Further comprising
The communication determination unit is configured to determine whether or not communication with the communication partner has succeeded each time it is determined that the host vehicle has traveled the update distance since the communication information was recorded,
The recording instruction unit is configured to cause the recording unit to record the communication information each time the communication determination unit makes a determination. The communication device according to any one of claims 1 to 7 ,
A situation configured to acquire the communication status from a detection unit (111) that detects a communication status representing a situation around the vehicle that affects the success or failure of communication when the communication determination unit makes a determination. Acquisition unit (112, S20)
Further comprising
The recording instruction unit is configured to record information associating the determination result, the determination position, and the communication status as the communication information. The communication device according to any one of claims 1 to 8 ,
The communication determination unit is configured to repeatedly perform the determination,
The recording instruction unit is configured to record information associating the determination result with the determination position as the communication information each time the determination by the communication determination unit is performed.
At a predetermined timing, the communication determination unit makes a determination in a predetermined area representing one area among one or a plurality of areas divided by a predetermined size including a road on which the vehicle travels. A determination number acquisition unit (112, S35) for acquiring a determination number indicating the number of times,
When the number of times of determination is acquired, the number of successes / failures indicating the number of times the communication unit communicated with the communication partner succeeded or failed in the number of times of determination is acquired, and the ratio of the number of times of success / failure to the number of times of determination A ratio calculation unit (112, S60, S80) configured to calculate a success / failure ratio;
Further comprising
The said recording instruction | indication part (112, S95) is a communication apparatus comprised so that the information which matched the said success / failure rate and the said predetermined area could be recorded as said communication information. The communication device according to claim 9 ,
The ratio calculation unit (112, S60) acquires, as the success / failure number, the number of times the communication unit has failed to communicate with the communication partner when the determination number is acquired. Configured to calculate a failure rate indicating a ratio of the number of failed times to a number of times,
The said recording instruction | indication part (112, S95) is a communication apparatus comprised so that the information which matched the said failure rate and the said predetermined area could be recorded as said communication information. The communication device according to claim 9 or 10 ,
The ratio calculation unit (112, S80) acquires, as the success / failure number, the number of successful communication with the communication partner by the communication unit among the determination times when the determination number is acquired. Configured to calculate a success ratio indicating a ratio of the successful number of times to the number of times;
The said recording instruction | indication part (112, S95) is a communication apparatus comprised so that the information which matched the said success ratio and the said predetermined area could be recorded as said communication information. A communication system (1) comprising one or more communication devices (11) mounted on a vehicle and a wireless recording device (91) that performs wireless communication with the communication devices,
The communication device
A position acquisition unit (112, S15) for acquiring a vehicle position indicating a position of the vehicle on a road on which the vehicle travels ;
A communication determination unit (112, S40) for determining whether or not a communication unit (21) that communicates with a predetermined communication partner has successfully communicated with the communication partner;
A determination result of the communication determining unit, the communication information based on the determination position indicating a vehicle position when the determination result is acquired, the recording instruction unit for recording the recording unit to the (112, S50, S70, S95 ) ,
A transmission instruction unit (112, S99) for wirelessly transmitting the communication information to the communication unit;
With
The wireless recording device includes:
A communication partner with which the communication unit communicates;
A storage instruction unit (91, S120) configured to acquire communication information transmitted from the communication unit and store the communication information in a storage unit (95) that stores the communication information.
A communication system comprising: A communication system according to claim 12 ,
The communication device
When the communication determining unit determines that the communication with the wireless recording device is successful, the control unit that controls the vehicle is configured to control the vehicle using communication with the wireless recording device. Oh Ru successful control, it adapted to perform the control command section (112, S85)
Further comprising
The wireless recording device includes:
The range set based on the communication information stored in the storage unit, the range within a predetermined distance from the position where the communication with the wireless recording device failed, the failure prediction range representing the range A prediction acquisition unit (91, S230) for acquiring prediction information indicating whether or not a vehicle position is included;
Configured such that the prediction information is transmitted to represent that it contains the said vehicle positioned in the failure prediction range, instruction to stop the successful control in the control command section, to the communication device by wireless communication Canceled transmission section (91, S250),
A communication system further comprising:   A communication system according to claim 13,
  In the communication device, the control command unit is configured to perform automatic driving control as control of the vehicle performed using communication with the communication partner.
  Communications system.   A communication system according to any one of claims 13 or 14,
  The communication device
  An execution information transmission unit configured to transmit information indicating control of the vehicle being executed or scheduled to be executed to the wireless communication device.
  Further comprising
  The wireless recording device includes:
  When the prediction information indicates that the vehicle position is included in the failure prediction range, it is determined that the vehicle position is included in the failure prediction range. An impact determination unit (S240) for determining whether or not to affect
  The stop transmission unit indicates that the control of the vehicle being executed or scheduled to be executed is the success control, the prediction information indicates that the vehicle position is included in the failure prediction range, and the vehicle position Is included in the failure prediction range, the instruction to stop the success control is transmitted when it is determined that the success control as the control of the vehicle being executed or scheduled to be executed is affected. Be done
  Communications system.

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