JP2007174520A - Dsrc vehicle-mounted apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a DSRC vehicle-mounted apparatus in which a utilization rate of received information can be improved by storing much more information received by a communication means in a storage region and providing the information for a user. <P>SOLUTION: A DSRC vehicle-mounted apparatus comprises: a communication means for receiving information provided by a road-mounted apparatus 17 by DSRC; a microcomputer 4 which includes a storage region for storing the information and judges whether or not to store the information in the storage region in accordance with a state of the storage region; and an external interface 8 and an HMI device 5 for transmitting the information stored in the storage region to an external device and causing the user to recognize it. When information from the road-mounted apparatus 17 is received and there is a storage enabled region, the microcomputer 4 stores the information in the storage enabled region and while there is no storage enabled region, and information stored in a storage region is being transmitted, the transmission is interrupted to store the information from the road-mounted apparatus 17 in the storage region where the information is stored. If there is no storage enabled region and it is a transmission waiting state, information from the road-mounted apparatus 17 is discarded. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a DSRC vehicle-mounted device that receives information provided by a roadside device by DSRC (Dedicated Short Range Communication).

Conventional information providing apparatuses are installed in mobile phones, IC cards, and automobiles having a short-range communication interface such as infrared rays, Bluetooth, ETC (Electronic Toll Collection), and non-contact IC cards. The data receiving terminal stores information such as the type of data desired by the user who has the information receiving terminal and the user's profile or preference.
When the information receiving terminal receives data from the information providing device, the microcomputer of the information receiving terminal (hereinafter abbreviated as “microcomputer”) determines whether there is an unused storage area in the storage area for storing data. Determine whether. Here, if there is an unused storage area, the received data is stored and output to the user, and if there is no unused storage area, the received data is discarded. (For example, refer to Patent Document 1).

JP 2003-242076 A

In a conventional information providing apparatus, when there is no unused storage area in the storage area of the information receiving terminal, the microcomputer discards all received data regardless of the data contents.
For this reason, even when the data received from the information providing device has high priority, such as data related to safety or data that matches the user's preference, there is a problem that all data is discarded and not provided to the user. It was.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to store more information received by the communication means in a storage area and to store information stored in the storage area. Is to provide a DSRC in-vehicle device capable of increasing the utilization rate of received information.

  The DSRC vehicle-mounted device according to the present invention includes a communication unit that receives information provided by a roadside device by DSRC, and a storage area that stores information received by the communication unit. The communication unit receives the information according to the state of the storage area. Determines whether or not to store the stored information in the storage area, stores the information stored in the storage area transmitted from the microcomputer to the external interface and stores in the storage area transmitted from the microcomputer And the HMI device that allows the user to recognize the received information, and when the communication means newly receives information from the roadside device, the microcomputer newly receives if there is a storable area in the storage area If the information from the roadside device is stored in the storable area and there is no storable area and the information already stored in the storage area is being transmitted, the transmission is interrupted and the transmission is In the storage area where the received information is stored, the information from the newly received roadside device is stored, and if there is no storable area and the transmission is in a standby state, the information from the newly received roadside device is stored. Discard it.

According to the DSRC in-vehicle device of the present invention, when the communication means newly receives information from the roadside device, the microcomputer transmits information that is not stored in the storage area and is already stored in the storage area. If it is in the middle, the transmission is interrupted, the newly received information from the roadside device is stored in the storage area where the transmission interrupted information is stored, and there is no storable area in the storage area. If in the standby state, the newly received information from the roadside device is discarded.
Therefore, more information received by the communication means can be stored in the storage area, and the information stored in the storage area can be provided to the user, so that the utilization rate of the received information can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a DSRC on-vehicle device 1 according to Embodiment 1 of the present invention.
In FIG. 1, this DSRC vehicle-mounted device 1 includes an antenna 2 (communication means), a communication circuit 3 (communication means), a microcomputer 4, an HMI (Human Machine Interface) device 5, a SAM 6 (Security Application Module), An IC card interface 7 (hereinafter abbreviated as “IC card I / F 7”), an external interface 8 (hereinafter abbreviated as “external I / F 8”), and a power supply circuit 9 are provided.

  The communication circuit 3 is a circuit that executes each process of modulation, demodulation, A / D conversion, and D / A conversion, and executes communication by DSRC with the road unit 17 via the antenna 2.

The microcomputer 4 includes a storage unit 10 including a plurality of storage areas for storing information received from the road unit 17, a ROM 18 (Read Only Memory) that stores a program, and a CPU 19.
The information received from the roadside device 17 is hereinafter referred to as “input data”, and the information stored in the storage area is hereinafter referred to as “stored data”.
Here, input data refers to payment information on expressways, parking lots, gas stations, drive-throughs, etc., traffic information related to accident information, traffic jam information, etc., or advertising information from parking lots, gas stations, drive-throughs, etc. Contains.

The HMI device 5 receives various operation inputs from the user and transmits them to the microcomputer 4, and a speaker 12 that is sound output means for notifying the user of the contents of the stored data output from the microcomputer 4. And LED (Light Emitting Diode) 13 which is a light output means for visually notifying the user of the contents of the stored data output from the microcomputer 4.
The stored data output from the microcomputer 4 is hereinafter referred to as “output data”.
Here, the operation input is an operation for interrupting transmission of output data, an operation for stopping transmission of output data, and a request for retransmission of output data when the user feels that output data is unnecessary. Including operations.

  The SAM 6 connects the IC card 14 mounted on the DSRC in-vehicle device 1 and the microcomputer 4 via the IC card I / F 7. Further, the SAM 6 encrypts the recording data in the IC card 14 transmitted to the road device 17 and decrypts the recording data transmitted from the road device 17 and recorded on the IC card 14.

The external I / F 8 connects the microcomputer 4 and a car navigation system 15 (external device) (hereinafter abbreviated as “car navigation 15”) that is provided outside the DSRC in-vehicle device 1 and that transmits output data.
The power supply circuit 9 supplies stable power to the microcomputer 4 and each circuit in the DSRC in-vehicle device 1 from a battery 16 that is a vehicle-side power supply mounted on the vehicle.

Here, the storage state of each storage area of the storage unit 10 will be described.
First, the first storage state is a state in which stored data exists and has already been transmitted to the car navigation system 15 or the HMI device 5, and a state in which no stored data exists, and this storage state is referred to as an IDLE state.
Next, the second storage state is a state in which stored data exists and is currently transmitted to the car navigation system 15 or the HMI device 5, and this storage state is referred to as a RUN state.
Finally, the third storage state is a state in which stored data exists and has not yet been transmitted to the car navigation 15 or the HMI device 5 (transmission standby state), and this storage state is referred to as a READY state.

FIG. 2 is an explanatory diagram showing the storage unit 10 of FIG. 1 in detail.
In FIG. 2, storage data A and area number N of area number 1 are in the IDLE state, and these storage areas can store input data as storable areas.
Further, the storage data B of area number 2 is in the RUN state, and the storage data C and D of area numbers 3 and 4 are in the READY state, respectively.

The microcomputer 4 in FIG. 1 stores new input data in the storage area as storage data when new input data is received and there is a storage area in the storage area, and the storage data as output data. It transmits to the car navigation system 15 or the HMI device 5.
When the microcomputer 4 receives new input data and there is no storable area in the storage area and the storage area is in the RUN state, the microcomputer 4 interrupts the transmission of the output data, and the output in which the transmission is interrupted. New input data is stored as storage data in a storage area in which data is stored.
Further, when the microcomputer 4 receives new input data, if there is no storable area in the storage area and the storage area is in the READY state, the microcomputer 4 discards the new input data.

  The operation of the DSRC on-vehicle device 1 according to Embodiment 1 of the present invention shown in FIG. 1 will be described below with reference to the flowchart of FIG. The following operations are executed mainly by the microcomputer 4.

First, in a vehicle equipped with the DSRC vehicle-mounted device 1, the process shown in FIG. 3 is performed by entering the communication area of the road unit 17 with power supplied from the battery 16 to the power supply circuit 9 and receiving new input data. Is started.
Before receiving this new input data, the storage state of each storage area of the storage unit 10 is determined.

Subsequently, it is determined whether there is a storage area in the IDLE state in the storage unit 10 (step S21).
If it is determined in step S21 that a storage area in the IDLE state exists (that is, Yes), the input data is stored in the storage area in the IDLE state (step S22), and the storage area is set in the READY state (step S21). S23), it is determined whether or not there is a storage area in the RUN state in the storage unit 10 (step S28).

  On the other hand, if it is determined in step S21 that there is no storage area in the IDLE state (that is, No), it is determined whether or not there is a storage area in the RUN state in the storage unit 10 (step S24). .

  If it is determined in step S24 that there is a storage area in the RUN state (that is, Yes), the transmission of output data is interrupted (step S25), and the storage area in which the output data whose transmission has been interrupted is stored Is set to the IDLE state (step S26), and the process returns to step S21.

At this time, since the storage area is already in the IDLE state in step S26, it is determined in step S21 that a storage area in the IDLE state exists (that is, Yes).
Then, the input data is stored in the storage area in the IDLE state (step S22), the storage area is set in the READY state (step S23), and the process proceeds to step S28.

  On the other hand, if it is determined in step S24 that there is no storage area in the RUN state (that is, No), the input data is discarded (step S27), and the process proceeds to step S28.

If it is determined in step S28 that a storage area in the RUN state exists (that is, Yes), it is determined whether or not transmission of output data from the storage area in the RUN state is completed (step S29).
If it is determined in step S29 that the transmission of the output data has been completed (that is, Yes), the storage area in which the output data for which transmission has been completed is stored is set to the IDLE state (step S30). It is determined whether or not there is a storage area in the READY state (step S31).

On the other hand, if it is determined in step S29 that transmission of output data has not been completed (that is, No), the process returns to step S29 and is determined again.
On the other hand, if it is determined in step S28 that there is no storage area in the RUN state (that is, No), the process proceeds to step S31.

If it is determined in step S31 that a storage area in the READY state exists (that is, Yes), the storage data stored in the storage area in the READY state is transmitted to the car navigation 15 or the HMI device 5 as output data. (Step S32), the storage area storing the output data that has started transmission is set to the RUN state (Step S33), and the process returns to Step S28.
On the other hand, if it is determined in step S31 that there is no storage area in the READY state (that is, No), the processing in FIG. 3 is terminated.

According to the DSRC on-vehicle device 1 according to Embodiment 1 of the present invention, when the microcomputer 4 newly receives input data, if there is no storage area in the storage area and the storage area is in the RUN state, The transmission of the output data is interrupted, and new input data is stored as storage data in the storage area in which the output data whose transmission has been interrupted is stored. Further, when the microcomputer 4 receives new input data, if there is no storable area in the storage area and the storage area is in the READY state, the microcomputer 4 discards the new input data.
Therefore, the usage rate of the received information can be increased by storing more input data in the storage area and providing it to the user as output data.
Further, even when advertisement information from a parking lot, a gas station, drive-through, etc. is frequently provided, it is possible to provide important traffic information to the user.

Embodiment 2. FIG.
In the first embodiment, when new input data is received, if there is no storable area in the storage area and the storage area is in the RUN state, transmission of output data is interrupted and transmission is interrupted. Although it is assumed that new input data is stored as storage data in the storage area in which output data is stored, the present invention is not limited to this, and the microcomputer 4 interrupts transmission of output data in response to a request from the user. Also good.

  At this time, the microcomputer 4 determines whether or not there is an operation input from a user who interrupts transmission of output data, and interrupts transmission of output data to the car navigation 15 or the HMI device 5 when an operation input for interrupting transmission is made. In addition, if there is a storage area in the READY state, the storage data stored in this storage area is transmitted as output data to the car navigation 15 or the HMI device 5.

Hereinafter, processing for interrupting transmission of output data in response to an operation input from the user will be described.
Since the configuration of the DSRC on-vehicle device 1 according to Embodiment 2 of the present invention is the same as that shown in Embodiment 1 above, description thereof is omitted.

Hereinafter, the operation of the DSRC vehicle-mounted device 1 according to Embodiment 2 of the present invention will be described with reference to the flowchart of FIG. Note that the description of the same operation as in the first embodiment is omitted.
First, the processing of FIG. 4 is started when the HMI device 5 receives a signal for interrupting transmission of output data.

Subsequently, it is determined whether or not there is a storage area in the RUN state in the storage unit 10 (step S41).
If it is determined in step S41 that there is a storage area in the RUN state (that is, Yes), the transmission of output data is interrupted (step S42), and the storage area in which the output data whose transmission is interrupted is stored Is set to the IDLE state (step S43), and the process proceeds to step S31.

  On the other hand, if it is determined in step S41 that there is no storage area in the RUN state (that is, No), the process proceeds to step S31.

According to the DSRC on-vehicle device 1 according to Embodiment 2 of the present invention, the microcomputer 4 interrupts transmission of output data to the car navigation 15 or the HMI device 5 when an operation input for interrupting transmission of output data is made. To do.
Therefore, it is possible to prevent unnecessary output data such as information that the user feels uncomfortable, for example, and reflect the user's preference.

Further, even when transmission of output data is interrupted by an operation input for interrupting transmission, if there is a storage area in the READY state, the microcomputer 4 uses the stored data stored in this storage area as output data. Alternatively, it is transmitted to the HMI device 5.
Therefore, output data to be transmitted can be switched, and output data necessary for the user can be provided.

Embodiment 3 FIG.
In the second embodiment, transmission of output data is interrupted by an operation input from a user who interrupts transmission of output data, and the stored data stored in the storage area in the READY state is used as output data for the car navigation 15 or the HMI device 5. However, the present invention is not limited to this, and the microcomputer 4 may stop transmission of output data in response to a request from the user.

  At this time, the microcomputer 4 determines whether or not there is an operation input from a user who stops transmission of output data, and stops transmission of output data to the car navigation system 15 or the HMI device 5 when an operation input for stopping transmission is made. In addition, if there is a storage area in the READY state, the fact is notified to the user.

Hereinafter, a process for stopping transmission of output data in response to an operation input from the user will be described.
Since the configuration of the DSRC on-vehicle device 1 according to Embodiment 3 of the present invention is the same as that shown in Embodiment 1 above, description thereof is omitted.

  Hereinafter, the operation of the DSRC vehicle-mounted device 1 according to Embodiment 3 of the present invention will be described with reference to the flowchart of FIG. Note that the description of the same operation as in the first embodiment is omitted.

First, it is determined whether there is a storage area in the READY state in the storage unit 10 (step S31).
If it is determined in step S31 that a storage area in the READY state exists (that is, Yes), the LED 13 blinks to notify the user that a storage area in the READY state exists (step S51). Then, it is determined whether or not an operation input for stopping transmission of output data has been made by the user (step S52).

  In step S52, when it is determined that the transmission stop operation input has not been made (that is, No), the storage data stored in the storage area in the READY state is transmitted to the car navigation 15 or the HMI device 5 as output data. (Step S32), the storage area storing the output data that has started transmission is set to the RUN state (Step S33), and it is determined whether or not the transmission of the output data from the storage area in the RUN state is completed (Step S33). S29).

If it is determined in step S29 that the transmission of output data has been completed (ie, Yes), the storage area in which the output data for which transmission has been completed is stored is set to the IDLE state (step S30), and the process returns to step S31. To do.
On the other hand, if it is determined in step S29 that transmission of output data has not been completed (that is, No), the process returns to step S29 and is determined again.

On the other hand, if it is determined in step S31 that there is no storage area in the READY state (ie, No), the LED 13 is turned off to notify the user that there is no storage area in the READY state (step S31). S53), the process of FIG.
On the other hand, if it is determined in step S52 that a transmission stop operation input has been made (that is, Yes), the processing in FIG. 5 ends.

According to the DSRC vehicle-mounted device 1 according to Embodiment 3 of the present invention, the microcomputer 4 outputs the output data to the car navigation system 15 or the HMI device 5 when an operation input is received from the user who stops transmission of the output data. Stop sending.
Therefore, for example, it is possible to prevent the output data unnecessary for the user from being provided, such as stopping transmission of the output data in the always-used route.

  Further, since the microcomputer 4 notifies the user that there is a storage area in the READY state by turning on the LED 13, the user can know that the input data has been received, and can obtain the output data without missing it. be able to.

In the third embodiment, when there is output data to be transmitted, the microcomputer 4 turns on the LED 13 to notify the user. However, the present invention is not limited to this, and the microcomputer 4 is not limited to the speaker. 12 may generate a sound to notify the user.
Also in this case, the same effect as in the third embodiment can be obtained.

Embodiment 4 FIG.
In Embodiment 3 described above, transmission of output data is stopped by an operation input from a user who stops transmission of output data, and if there is output data to be transmitted, the user is notified of that fact. Cannot know the contents of the input data received during transmission stop.

Therefore, when the user inputs an operation to cancel transmission of output data, if the output data to be transmitted is held, it is desirable to transmit the output data to the car navigation 15 or the HMI device 5.
At this time, the microcomputer 4 determines whether or not there is an operation input from the user that cancels the transmission stop of the output data, and when there is a storage area in the READY state when the operation input to cancel the transmission stop is made, The storage data stored in this storage area is transmitted as output data to the car navigation system 15 or the HMI device 5.

Hereinafter, a process of canceling output data transmission stop by operation input from the user and transmitting the stored data stored in the storage area in the READY state to the car navigation 15 or the HMI device 5 as output data will be described.
Since the configuration of the DSRC on-vehicle device 1 according to Embodiment 4 of the present invention is the same as that shown in Embodiment 1 above, description thereof is omitted.

Hereinafter, the operation of the DSRC vehicle-mounted device 1 according to Embodiment 4 of the present invention will be described with reference to the flowchart of FIG.
First, when the HMI device 5 receives a signal for canceling the suspension of output data transmission, the processing in FIG. 6 is started.
Subsequently, it is determined whether or not there is a storage area in the READY state in the storage unit 10 (step S61).

  If it is determined in step S61 that a storage area in the READY state exists (that is, Yes), the storage data stored in the storage area in the READY state is transmitted to the car navigation 15 or the HMI device 5 as output data. (Step S62) The storage area where the output data that has started transmission is stored is set to the RUN state (Step S63), and it is determined whether or not the transmission of the output data from the storage area in the RUN state is completed (Step S64). ).

If it is determined in step S64 that transmission of the output data has been completed (ie, Yes), the storage area in which the output data for which transmission has been completed is stored is set to the IDLE state (step S65), and the process returns to step S61. To do.
On the other hand, if it is determined in step S64 that transmission of output data has not been completed (that is, No), the process returns to step S64 and is determined again.

  On the other hand, if it is determined in step S61 that there is no storage area in the READY state (that is, No), the processing in FIG. 6 ends.

According to the DSRC on-vehicle device 1 according to Embodiment 4 of the present invention, when there is a storage area in the READY state when the microcomputer 4 receives an operation input from the user who cancels the suspension of output data transmission, The stored data stored in this storage area is transmitted as output data to the car navigation system 15 or the HMI device 5.
Therefore, even input data received while transmission of output data is stopped can be provided to the user, and the user can obtain the output data without missing it.

Embodiment 5 FIG.
In the fourth embodiment, when there is a storage area in the READY state when an operation input is issued from the user who cancels the output data transmission stop, the stored data stored in the storage area is output as the car navigation system. 15 or the HMI device 5 is transmitted, but the user receives all the received output data or refuses to provide all the output data except when the operation is input every time the input data is received. I can only do that.

Therefore, it is desirable to add a parameter indicating the priority of the contents to the input data, and the microcomputer 4 determines transmission of output data or transmission stop according to the priority added to the input data.
At this time, the microcomputer 4 determines whether or not the priority added to the input data is higher than the arbitrarily set value, and discards the input data if the priority is lower than the set value. . In addition, when the priority added to the input data is higher than the set value, the microcomputer 4 sequentially transmits the input data having higher priority to the car navigation 15 or the HMI device 5 as output data.

In the following, a process for discarding input data according to the priority added to the input data and a process for transmitting the output data to the car navigation 15 or the HMI device 5 in order from the input data with the highest priority will be described.
Since the configuration of DSRC on-vehicle device 1 according to Embodiment 5 of the present invention is the same as that shown in Embodiments 1 and 2, the description thereof is omitted.

  Hereinafter, the operation of the DSRC vehicle-mounted device 1 according to Embodiment 5 of the present invention will be described with reference to the flowchart of FIG. Note that the description of the same operation as in the first embodiment is omitted.

First, it is determined whether there is a storage area in the READY state in the storage unit 10 (step S31).
If it is determined in step S31 that a storage area in the READY state exists (that is, Yes), it is determined whether or not the priority of the storage data in the storage area in the READY state is higher than the set value ( Step S71).

  If it is determined in step S71 that the priority is higher than the set value (that is, Yes), the storage data having the highest priority among the storage data stored in the storage area in the READY state is output data. Is transmitted to the car navigation system 15 or the HMI device 5 (step S72), the storage area storing the output data that has started transmission is set to the RUN state (step S33), and the process returns to step S28.

On the other hand, if it is determined in step S31 that there is no storage area in the READY state (that is, No), the processing in FIG. 7 ends.
On the other hand, if it is determined in step S71 that the priority is lower than the set value (ie, No), the priority is higher than the set value among the stored data stored in the storage area in the READY state. The storage area in which the low storage data is stored is set to the IDLE state (step S73), and the process returns to step S28.

According to the DSRC on-vehicle device 1 according to Embodiment 5 of the present invention, the microcomputer 4 discards the input data when the priority added to the input data is lower than the set value, which is unnecessary for the user. It is possible to prevent providing output data.
Further, since the microcomputer 4 transmits the output data to the car navigation 15 or the HMI device 5 in order from the input data with the higher priority, the output data with the higher priority can be quickly provided to the user.

Embodiment 6 FIG.
In Embodiments 1 to 5 described above, it is determined that transmission of output data is interrupted or transmission is stopped according to various operation inputs from the user or priority added to the input data. The output data transmitted to the HMI device 5 is not transmitted again.

Therefore, it is desirable to retransmit the output data once transmitted to the car navigation 15 or the HMI device 5 when an operation input requesting retransmission of the output data is made by the user.
At this time, the microcomputer 4 determines whether or not there is an operation input from a user requesting retransmission of output data, and when an operation input requesting retransmission is made, if there is a storage area in the IDLE state, The storage data stored in this storage area is transmitted again to the car navigation system 15 or the HMI device 5 as output data.

Below, the process which transmits again the output data once transmitted to the car navigation 15 or the HMI apparatus 5 by the operation input from a user is demonstrated.
Since the configuration of the DSRC on-vehicle device 1 according to Embodiment 6 of the present invention is the same as that shown in Embodiment 1 described above, description thereof is omitted.

Hereinafter, the operation of the DSRC vehicle-mounted device 1 according to Embodiment 6 of the present invention will be described with reference to the flowchart of FIG.
First, when the HMI device 5 receives a signal requesting retransmission of output data, the processing of FIG. 8 is started.
Subsequently, it is determined whether there is a storage area in the IDLE state in the storage unit 10 (step S81).

  If it is determined in step S81 that the IDLE state storage area exists (ie, Yes), the storage data stored in the IDLE state storage area is transmitted as output data to the car navigation 15 or the HMI device 5. (Step S82), the storage area storing the output data that has started transmission is set to the RUN state (Step S83), and it is determined whether or not the transmission of the output data from the storage area in the IDLE state is completed (Step S83). S84).

If it is determined in step S84 that transmission of the output data has been completed (that is, Yes), the storage area in which the output data for which transmission has been completed is stored is set to the IDLE state (step S85), and the process of FIG. Exit.
On the other hand, if it is determined in step S84 that transmission of the output data has not been completed (that is, No), the process returns to step S84 and is determined again.

  On the other hand, if it is determined in step S81 that there is no storage area in the IDLE state (that is, No), the processing in FIG. 8 ends.

According to the DSRC on-vehicle device 1 according to Embodiment 6 of the present invention, when there is a storage area for the IDLE state when the microcomputer 4 receives an operation input from a user who requests retransmission of output data, The stored data stored in this storage area is transmitted again to the car navigation system 15 or the HMI device 5 as output data.
Therefore, output data can be reliably provided to the user.

In the first to sixth embodiments, the car navigation system 15 is connected to the external I / F 8. However, the present invention is not limited to this, and a personal computer or the like may be connected.
Also in this case, the same effects as those of the first to sixth embodiments can be obtained.

It is a block diagram which shows the DSRC onboard equipment which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the storage part of FIG. 1 in detail. It is a flowchart which shows operation | movement of the DSRC onboard equipment of FIG. It is a flowchart which shows operation | movement of the DSRC onboard equipment which concerns on Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the DSRC onboard equipment which concerns on Embodiment 3 of this invention. It is a flowchart which shows operation | movement of the DSRC onboard equipment which concerns on Embodiment 4 of this invention. It is a flowchart which shows operation | movement of the DSRC onboard equipment which concerns on Embodiment 5 of this invention. It is a flowchart which shows operation | movement of the DSRC onboard equipment which concerns on Embodiment 6 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 DSRC onboard equipment, 2 Antenna (communication means), 3 Communication circuit (communication means), 4 Microcomputer (microcomputer), 5 HMI apparatus, 8 External interface, 10 Storage part, 15 Car navigation system (car navigation system) (external apparatus) , 17 Roadside machine.

Claims (9)

A communication means for receiving information provided by the roadside device by DSRC;
A microcomputer having a storage area for storing information received by the communication means, and determining whether to store the information received by the communication means in the storage area according to the state of the storage area;
An external interface for transmitting information stored in the storage area transmitted from the microcomputer to an external device;
An HMI device that allows a user to recognize information stored in the storage area transmitted from the microcomputer;
When the communication means newly receives information from the roadside device, the microcomputer
When there is a storable area in the storage area, the newly received information from the roadside device is stored in the storable area,
If there is no storable area and information already stored in the storage area is being transmitted, the transmission is interrupted and a new reception is received in the storage area in which the information whose transmission has been interrupted is stored. Store the information from the road machine
If there is no storable area and the transmission is in a standby state, the newly received information from the roadside device is discarded.   When the microcomputer receives a signal for interrupting transmission of the information stored in the storage area, the microcomputer transmits the information stored in the storage area to the external device or the HMI apparatus. The DSRC on-vehicle device according to claim 1, wherein the device is interrupted.   The microcomputer switches the information stored in the storage area to be transmitted to the external apparatus or the HMI apparatus when the HMI apparatus receives a signal for interrupting transmission of the information stored in the storage area. The DSRC on-vehicle device according to claim 1 or 2, wherein the device is a DSRC on-vehicle device.   When the HMI device receives a signal for stopping transmission of information stored in the storage area, the microcomputer transmits the information stored in the storage area to the external device or the HMI device. The DSRC vehicle-mounted device according to any one of claims 1 to 3, wherein the device is stopped.   The microcomputer is stored in the storage area to be transmitted to the external device or the HMI device when transmission of information stored in the storage region to the external device or the HMI device is stopped. The DSRC on-vehicle device according to claim 4, wherein the user is notified of the presence or absence of information.   The microcomputer accepts a signal for canceling transmission stop of information stored in the storage area by the HMI device, and transmits the information stored in the storage area to the external device or the HMI device. If the information stored in the storage area to be transmitted to the external device or the HMI device is held when the suspension is released, the information stored in the storage area is transmitted. The DSRC on-vehicle device according to claim 4 or 5.   The information received by the communication unit includes a parameter indicating a priority of contents, and the microcomputer stops transmission of information stored in the storage area based on the priority. The DSRC on-vehicle device according to any one of claims 1 to 6.   8. The DSRC on-vehicle device according to claim 7, wherein the microcomputer sets a transmission order of information stored in the storage area based on the priority.   When the microcomputer receives a signal for retransmitting the information stored in the storage area, the microcomputer transmits again the information stored in the storage area that has already been transmitted. The DSRC on-vehicle device according to claim 1.

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