JP6021330B2 - Data transmission / reception system, data transmission / reception method, vehicle-mounted device, program, and recording medium - Google Patents

Description

The present invention relates to a data transmitting and receiving system, a data transmitting and receiving method, the car mounting device, a program, and a recording medium. In particular, the present invention relates to a data transmitting and receiving system vehicle mounting device to send and receive data, data transmission and reception method, vehicle-mounted device for performing information processing related to automobiles, the program causing a computer to function as the vehicle-mounted device, and a recording medium recording the program.

  An automobile may be provided with a vehicle-mounted device for transmitting and receiving data indicating various information related to the vehicle to / from an external device (see, for example, Patent Document 1). The vehicle-mounted device transmits data to an external device using wireless communication such as DSRC (Dedicated Short Range Communication).

Japanese Patent No. 3353821

  By the way, the data transmitted from the vehicle-mounted device may be necessary even when the automobile engine is not running. However, the vehicle-mounted device generally operates with electric power supplied from a vehicle battery. Therefore, the vehicle-mounted device cannot transmit data to the external device when power from the vehicle battery is not supplied, such as when the vehicle engine is not running.

In order to solve the above-described problem , according to the first aspect of the present invention, a data transmission / reception system in which an in-vehicle device transmits and receives data, the on-vehicle device that performs information processing related to an automobile, and the power supplied from the on-vehicle device. An IC tag that receives and stores data from the vehicle-mounted device when received and activated, and an IC tag that transmits the stored data to the reader when activated by receiving a radio wave transmitted from the reader; When the power supply to the own device is cut off, the cut-off detection unit that detects the fact and the cut-off detection unit detects that the power supply to the own device is cut off. Acquire situation data indicating the situation when the power supply is cut off from the car computer of the car, and refer to the situation when the device is not activated according to the situation indicated by the situation data Distribution and has an information acquisition section that acquires from the device provided on the automobile, to the IC tag, a data transmitting unit that transmits data indicating information information acquisition unit has acquired.

According to the second aspect of the present invention, there is provided a data transmission / reception method in which an in-vehicle device that performs information processing related to an automobile transmits and receives data, and when the on-vehicle device interrupts the power supply to its own device, that fact is Status data that indicates the situation when the power supply to the device is cut off when the on-vehicle device detects that the power supply to the device is cut off at the blockage detection step. An information acquisition stage for acquiring information to be referred to in a situation where the device is not activated in accordance with the situation indicated by the situation data, from a device provided in the automobile; When activated by receiving power supplied from the OBE, data is received from the OBE and stored, and when activated by receiving the radio wave transmitted from the reader, the stored data is stored. To the IC tag for transmitting data to the reader, the vehicle-mounted device includes a data transmitting step of transmitting the data indicating the information acquired in the information acquisition step.

According to the third aspect of the present invention, the vehicle-mounted device performs information processing related to an automobile, and when the power supply to the device is cut off, the cut-off detection unit and the cut-off detection unit detect the fact. When it is detected that the power supply to the device has been cut off, status data indicating the situation when the power supply to the device is cut off is acquired from the car computer of the car, and the situation indicated by the status data is displayed. In response, when the information acquisition unit that acquires information to be referred to from the device provided in the automobile and the power supplied from the on-vehicle device is started, the information to be referred to in the situation where the own device is not activated The information acquired by the information acquisition unit is displayed on the IC tag that receives and stores data from the vehicle-mounted device and receives the radio wave transmitted from the reader and activates the stored data to the reader. And a data transmitter for transmitting data.

According to the fourth aspect of the present invention, there is provided a program for causing a computer to function as an on-vehicle device that performs information processing related to an automobile, and the computer detects when the power supply to the device is cut off. When the detection unit and the shutdown detection unit detect that the power supply to the own device is cut off, the situation data indicating the situation when the power supply to the own device is cut off is acquired from the car computer of the car. In response to the situation indicated by the situation data, the information acquisition unit that obtains information to be referred to in the situation where the device itself is not activated from the device provided in the automobile, receives the power supplied from the computer When activated, it receives and stores data from the computer, and stores it when activated by receiving radio waves transmitted from the reader. The over data to the IC tag to be transmitted to the reader, to function as a data transmission unit that transmits data indicating information information acquisition unit has acquired.

According to a fifth aspect of the present invention, there is provided a recording medium that records a program for causing a computer to function as an on-vehicle device that performs information processing related to an automobile, and when the power supply to the device is cut off, When the shutdown detection unit that detects the fact detects that the power supply to the own device has been cut off, the status data indicating the situation when the power supply to the own device is cut off An information acquisition unit that acquires information from a device provided in an automobile, which is acquired from a computer, and acquires information to be referred to in a situation where the device itself is not activated, according to the situation indicated by the situation data, is supplied from the computer If it is activated by receiving power from the computer, it receives and stores data from the computer, and activates by receiving radio waves transmitted from the reader. To the data stored to the IC tag to be transmitted to the reader, recording a program to function as a data transmission unit that transmits data indicating information information acquisition unit has acquired.

  The above summary of the invention does not enumerate all necessary features of the present invention. Also, a sub-combination of these feature groups can also be an invention.

  As is clear from the above description, data indicating information to be referred to in a situation where the information processing apparatus is not activated can be read from an IC (Integrated Circuit) tag that is activated in response to a radio wave transmitted from the reader. it can.

It is a figure which shows an example of the utilization environment of the data transmission / reception system 100 which concerns on one Embodiment. It is a figure which shows an example of the block configuration of the onboard equipment 110. FIG. It is a figure which shows an example of the operation | movement flow of the onboard equipment. It is a figure which shows an example of the operation | movement flow of the onboard equipment. It is a figure which shows an example of the hardware constitutions of the computer 800 which comprises the onboard equipment 110 which concerns on this embodiment.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are described below. However, this is not always essential for the solution of the invention.

  FIG. 1 shows an example of a usage environment of a data transmission / reception system 100 according to an embodiment. The data transmission / reception system 100 is a system in which the vehicle-mounted device 110 transmits / receives data. More specifically, the data transmission / reception system 100 includes an in-vehicle device 110 and an IC tag 130. The vehicle-mounted device 110 and the IC tag 130 are communicatively connected via a communication cable. The vehicle-mounted device 110 may be an example of the “information processing device” in the present invention. Here, the information processing apparatus is an apparatus that performs information processing.

  The vehicle-mounted device 110 is a device that performs information processing related to the electric vehicle V. More specifically, the vehicle-mounted device 110 operates by receiving electric power supplied from the battery B of the electric vehicle V. The vehicle-mounted device 110 supplies power to the IC tag 130 via the communication cable while receiving power supplied from the battery B. The vehicle-mounted device 110 transmits / receives data to / from the IC tag 130.

  The IC tag 130 is a wireless IC chip. More specifically, the IC tag 130 is activated by receiving power supplied from the vehicle-mounted device 110 via a communication cable. In that case, the IC tag 130 transmits / receives data to / from the vehicle-mounted device 110. And IC tag 130 will memorize | store the data, if data are received from the onboard equipment 110. FIG. Further, the IC tag 130 is activated in response to a radio wave transmitted from the reader R. In that case, the IC tag 130 transmits and receives data to and from the reader R. When the IC tag 130 receives data from the reader R, the IC tag 130 stores the data. Here, the reader is a device that reads and writes the IC tag 130.

  In the present embodiment, a configuration in which the data transmission / reception system 100 includes one in-vehicle device 110 and an IC tag 130 for one electric vehicle V will be described for the purpose of preventing the description from becoming complicated. . However, the data transmission / reception system 100 may include a plurality of vehicle-mounted devices 110 and IC tags 130 for one electric vehicle V.

  FIG. 2 shows an example of a block configuration of the vehicle-mounted device 110. The vehicle-mounted device 110 includes a block detection unit 111, an information acquisition unit 112, a data transmission unit 113, a transmission request unit 114, a data reception unit 115, and an information processing unit 116. Hereinafter, the function and operation of each component will be described.

  The interruption | blocking detection part 111 detects that when the electric power supply to the onboard equipment 110 is interrupted | blocked.

  The information acquisition unit 112 acquires information to be referred to when the vehicle-mounted device 110 is not activated.

  The data transmission unit 113 transmits data indicating information to be referred to in a situation where the vehicle-mounted device 110 is not activated to the IC tag 130. If demonstrating it more concretely, the data transmission part 113 will transmit data, when the interruption | blocking detection part 111 detects that the electric power supply to the onboard equipment 110 was interrupted | blocked. In addition, the data transmission unit 113 transmits data indicating the information acquired by the information acquisition unit 112.

  The transmission request unit 114 makes a data transmission request to the IC tag 130 when the vehicle-mounted device 110 is activated.

  The data receiving unit 115 receives data transmitted from the IC tag 130.

  The information processing unit 116 performs information processing according to the content of information indicated by the data received by the data receiving unit 115.

  FIG. 3 shows an example of the operation flow of the vehicle-mounted device 110. In this operation flow, the operation of the vehicle-mounted device 110 when the supply of power to the vehicle-mounted device 110 is stopped will be described. In the description of this operation flow, both FIG. 1 and FIG. 2 are referred to.

  The vehicle-mounted device 110 operates by receiving power supplied from the battery B of the electric vehicle V. At that time, the IC tag 130 is activated by the power supplied from the vehicle-mounted device 110 via the communication cable. However, the electric power supplied to the onboard equipment 110 may be interrupted for some reason. In that case, the vehicle-mounted device 110 shuts down after performing the processing of the operation flow shown in FIG. The on-vehicle device 110 temporarily uses, for example, the power of the auxiliary battery of the on-vehicle device 110 when the processing of the operation flow shown in FIG. 3 is performed.

  When the supply of power to the vehicle-mounted device 110 is cut off, the interruption detection unit 111 of the vehicle-mounted device 110 detects that fact (S101). Here, as a situation where the supply of power to the vehicle-mounted device 110 is interrupted, for example, when the engine of the electric vehicle V is stopped by the operation of a switch such as an ignition key or an engine starter, or the battery B of the electric vehicle V is The case where it cuts out, the case where the electric vehicle V fails, etc. are mentioned. When detecting that the supply of power to the vehicle-mounted device 110 has been interrupted, the interruption detection unit 111 sends data indicating that fact to the information acquisition unit 112.

  When the information acquisition unit 112 of the vehicle-mounted device 110 receives the data transmitted from the interruption detection unit 111, the information acquisition unit 112 acquires information to be referred to in a situation where the vehicle-mounted device 110 is not activated (S102). More specifically, the information acquisition unit 112 uses, for example, CAN (Controller Area Network) of the electric vehicle V as data indicating the situation when the supply of power to the vehicle-mounted device 110 as described above is interrupted. Via the computer of the electric vehicle V. And the information acquisition part 112 is the information which should be referred in the condition where the onboard equipment 110 is not started according to the condition shown by the acquired data, for example, various apparatuses connected to CAN of the electric vehicle V Get from. For example, when the engine of the electric vehicle V is stopped by the operation of a switch such as an ignition key or an engine starter and the power supply to the vehicle-mounted device 110 is interrupted, the information acquisition unit 112 starts the vehicle-mounted device 110 Information on the remaining charge and travel distance is acquired as information that should be referred to in a situation that is not. In addition, for example, when the battery B of the electric vehicle V is exhausted and the power supply to the vehicle-mounted device 110 is interrupted, the information acquisition unit 112 is information to be referred to in a situation where the vehicle-mounted device 110 is not activated. As a result, the remaining charge information is acquired. In addition, for example, when the electric vehicle V fails and the supply of power to the vehicle-mounted device 110 is interrupted, the information acquisition unit 112 is information to be referred to in a situation where the vehicle-mounted device 110 is not activated. Obtain fault diagnosis information. Then, the information acquisition unit 112 sends data indicating the acquired information to the data transmission unit 113.

  When the data transmission unit 113 of the in-vehicle device 110 receives the data transmitted from the information acquisition unit 112, the data transmission unit 113 transmits the data to the IC tag 130 (S103). When the IC tag 130 receives data transmitted from the vehicle-mounted device 110, the IC tag 130 stores the data. Thereafter, the vehicle-mounted device 110 is shut down.

  In this way, the IC tag 130 stores information to be referred to when the vehicle-mounted device 110 is not activated. Therefore, for example, the user of the electric vehicle V uses the reader R without starting the engine of the electric vehicle V in order to start the on-vehicle device 110 for information that can be originally referred to by starting the on-vehicle device 110. You can refer to it. Further, as described above, even when the battery B of the electric vehicle V runs out or when the electric vehicle V breaks down, the IC tag 130 has information to be referred to in a situation where the vehicle-mounted device 110 is not activated. Is memorized. Therefore, for example, the user of the electric vehicle V can refer to useful information even in a situation where the engine of the electric vehicle V cannot be started.

  FIG. 4 shows an example of the operation flow of the vehicle-mounted device 110. In this operation flow, the operation of the vehicle-mounted device 110 when the supply of power to the vehicle-mounted device 110 is started will be described. In the description of this operation flow, both FIGS. 1 to 3 are referred to.

  For example, information to be input to the vehicle-mounted device 110 when the vehicle-mounted device 110 is not activated, such as while the engine of the electric vehicle V is stopped, is stored in the IC tag 130 using the reader R. The Here, examples of information to be input to the vehicle-mounted device 110 when the vehicle-mounted device 110 is not activated include information on a parking fee and a charging fee.

  And when switches, such as an ignition key and an engine starter, are operated, the onboard equipment 110 will start by receiving the electric power supplied from the battery B of the electric vehicle V. When the vehicle-mounted device 110 is activated, the IC tag 130 is activated by receiving power supplied from the vehicle-mounted device 110 via a communication cable.

  When the on-vehicle device 110 is activated, the transmission request unit 114 of the on-vehicle device 110 makes a data transmission request to the IC tag 130 (S201). When there is a data transmission request from the vehicle-mounted device 110, the IC tag 130 transmits the data stored using the reader R while the vehicle-mounted device 110 is not activated to the vehicle-mounted device 110.

  When receiving the data transmitted from the IC tag 130 (S202), the data receiving unit 115 of the vehicle-mounted device 110 transmits the data to the information processing unit 116.

  When receiving the data sent from the data receiving unit 115, the information processing unit 116 of the vehicle-mounted device 110 performs information processing according to the content of the information indicated by the data (S203). For example, when the information processing unit 116 receives data indicating information on a parking fee and a charging fee, the information processing unit 116 communicates with an external server to perform an electronic settlement process for the parking fee and the charging fee.

  As described above, when activated, the vehicle-mounted device 110 reads data stored in the IC tag 130 and performs information processing according to the content of information indicated by the data. Therefore, for example, a business operator of a parking lot or a charging stand can charge a parking fee or a charging fee without causing the user to start the engine of the electric vehicle V.

  As described above, the vehicle-mounted device 110 transmits data indicating information to be referred to in a situation where the self-device is not activated to the IC tag 130. In this manner, depending on the data transmission / reception system 100, data indicating information to be referred to in a situation where the vehicle-mounted device 110 is not activated can be read from the IC tag 130 activated by receiving the radio wave transmitted from the reader. it can.

  Moreover, as above-mentioned, the onboard equipment 110 detects that when the electric power supply to an own apparatus is interrupted | blocked. In this way, in the data transmission / reception system 100, data can be stored in the IC tag 130 when the vehicle-mounted device 110 shuts down.

  Moreover, as above-mentioned, the onboard equipment 110 acquires the information which should be referred in the condition where the own apparatus has not started. In this manner, in the data transmission / reception system 100, if the type of information to be referred to is set in a situation where the time device is not activated, the information is acquired.

  Moreover, as above-mentioned, the onboard equipment 110 performs the transmission request | requirement of data with respect to IC tag 130, when an own apparatus starts. And the onboard equipment 110 receives the data transmitted from the IC tag 130. And the onboard equipment 110 performs the information processing according to the content of the information shown with the received data. Thus, in the data transmission / reception system 100, data to be transmitted to the vehicle-mounted device 110 can be transmitted even if the vehicle-mounted device 110 is not activated.

  FIG. 5 shows an example of a hardware configuration of a computer 800 that constitutes the vehicle-mounted device 110 according to the present embodiment. A computer 800 according to the present embodiment includes a CPU peripheral unit having a CPU (Central Processing Unit) 802, a RAM (Random Access Memory) 803, a graphic controller 804, and a display 805, and an input / output unit connected to each other by a host controller 801. An input / output unit having a communication interface 807, a hard disk drive 808, and a CD-ROM (Compact Disk Read Only Memory) drive 809 connected to each other by a controller 806, and a ROM (Read Only Memory) connected to the input / output controller 806 810, a flexible disk drive 811 and a legacy input / output unit having an input / output chip 812. Obtain.

  The host controller 801 connects the RAM 803, the CPU 802 that accesses the RAM 803 at a high transfer rate, and the graphic controller 804. The CPU 802 operates based on programs stored in the ROM 810 and the RAM 803 and controls each unit. The graphic controller 804 acquires image data generated on a frame buffer provided in the RAM 803 by the CPU 802 and the like and displays the image data on the display 805. Instead of this, the graphic controller 804 may include a frame buffer for storing image data generated by the CPU 802 or the like.

  The input / output controller 806 connects the host controller 801 to the communication interface 807, the hard disk drive 808, and the CD-ROM drive 809, which are relatively high-speed input / output devices. The hard disk drive 808 stores programs and data used by the CPU 802 in the computer 800. The CD-ROM drive 809 reads a program or data from the CD-ROM 892 and provides it to the hard disk drive 808 via the RAM 803.

  In addition, the input / output controller 806 is connected to the ROM 810, the flexible disk drive 811, and the relatively low-speed input / output device of the input / output chip 812. The ROM 810 stores a boot program that is executed when the computer 800 is started and / or a program that depends on the hardware of the computer 800. The flexible disk drive 811 reads a program or data from the flexible disk 891 and provides it to the hard disk drive 808 via the RAM 803. The input / output chip 812 connects the flexible disk drive 811 to the input / output controller 806 and connects various input / output devices to the input / output controller 806 via, for example, a parallel port, serial port, keyboard port, mouse port, and the like. To do.

  A program provided to the hard disk drive 808 via the RAM 803 is stored in a recording medium such as a flexible disk 891, a CD-ROM 892, or an IC (Integrated Circuit) card and provided by the user. The program is read from the recording medium, installed in the hard disk drive 808 in the computer 800 via the RAM 803, and executed by the CPU 802.

  The program installed in the computer 800 and causing the computer 800 to function as the vehicle-mounted device 110 transmits data indicating information to be referred to in a state where the own device is not activated to the IC tag 130 in step S103. Function as the data transmission unit 113 to be used.

  Further, the program causes the computer 800 to detect when the power supply to the own device is cut off in step S101, and the cutoff detection unit 111 detects that fact, and the cutoff detection unit 111 supplies the power to the own device. If it is detected that the data has been blocked, the data transmission unit 113 that transmits data may be caused to function in step S103.

  Further, the program causes the computer 800 to acquire data indicating information acquired by the information acquisition unit 112 and an information acquisition unit 112 that acquires information to be referred to in a situation where the device itself is not activated in step S102. You may make it function as the data transmission part 113 transmitted in step S103.

  Further, the program is transmitted from the IC tag 130 in step S202 and the transmission request unit 114 that makes a data transmission request to the IC tag 130 when the computer 800 starts up in step S201. The data reception unit 115 that receives the received data and the information processing according to the content of the information indicated by the data received by the data reception unit 115 may function as the information processing unit 116 that is performed in step S203.

  The information processing described in these programs is read into the computer 800, whereby the interruption detection unit 111, the information acquisition unit 112, and the data transmission, which are specific means in which the software and the various hardware resources described above cooperate. Functions as a unit 113, a transmission request unit 114, a data reception unit 115, and an information processing unit 116. And the specific vehicle equipment 110 according to the intended purpose is constructed | assembled by implement | achieving the calculation of the information according to the intended purpose of the computer 800 in this embodiment, or a process by these specific means.

  As an example, when communication is performed between the computer 800 and an external device or the like, the CPU 802 executes a communication program loaded on the RAM 803 and executes a communication interface based on the processing content described in the communication program. A communication process is instructed to 807. Under the control of the CPU 802, the communication interface 807 reads transmission data stored in a transmission buffer area or the like provided on a storage device such as the RAM 803, the hard disk drive 808, the flexible disk 891, or the CD-ROM 892, and sends it to the network. The reception data transmitted or received from the network is written into a reception buffer area or the like provided on the storage device. As described above, the communication interface 807 may transfer transmission / reception data to / from the storage device by the direct memory access method. Instead, the CPU 802 reads data from the transfer source storage device or the communication interface 807. The transmission / reception data may be transferred by writing the data to the transfer destination communication interface 807 or the storage device.

  In addition, the CPU 802 transfers all or a necessary part of the files or database stored in the external storage device such as the hard disk drive 808, the flexible disk 891, and the CD-ROM 892 to the RAM 803 by direct memory access transfer or the like. The data is read and various processes are performed on the data on the RAM 803. Then, the CPU 802 writes the processed data back to the external storage device by direct memory access transfer or the like.

  In such processing, since the RAM 803 can be regarded as temporarily holding the contents of the external storage device, in the present embodiment, the RAM 803 and the external storage device are collectively referred to as a memory, a storage unit, or a storage device. . Various types of information such as various programs, data, tables, and databases in the present embodiment are stored on such a storage device and are subjected to information processing. In addition, the CPU 802 can hold a part of the RAM 803 in the cache memory and perform reading and writing on the cache memory. Even in such a form, the cache memory bears a part of the function of the RAM 803. Therefore, in the present embodiment, the cache memory is also included in the RAM 803, the memory, and / or the storage device unless otherwise indicated. To do.

  In addition, the CPU 802 performs various operations, such as various operations, information processing, condition determination, information retrieval, replacement, and the like described in the present embodiment for data read from the RAM 803 and specified by a command sequence of the program. Is written back to the RAM 803. For example, when performing the condition determination, the CPU 802 satisfies the conditions such that the various variables shown in the present embodiment are larger, smaller, above, below, or equal to other variables or constants. If the condition is satisfied or not satisfied, the program branches to a different instruction sequence or calls a subroutine.

  In addition, the CPU 802 can search for information stored in a file in a storage device, a database, or the like. For example, when a plurality of entries in which the attribute value of the second attribute is associated with the attribute value of the first attribute are stored in the storage device, the CPU 802 stores the plurality of entries stored in the storage device. The entry that matches the condition in which the attribute value of the first attribute is specified is retrieved, and the attribute value of the second attribute that is stored in the entry is read, thereby associating with the first attribute that satisfies the predetermined condition The attribute value of the specified second attribute can be obtained.

  The program or module described above may be stored in an external storage medium. As a storage medium, in addition to a flexible disk 891 and a CD-ROM 892, an optical recording medium such as a DVD (Digital Versatile Disk) or a CD (Compact Disk), a magneto-optical recording medium such as an MO (Magneto-Optical disk), or a tape A medium, a semiconductor memory such as an IC card, or the like can be used. Further, a storage medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet may be used as a recording medium, and the program may be provided to the computer 800 via the network.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various changes or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can also be included in the technical scope of the present invention.

  The execution order of each process such as operations, procedures, steps, and stages in the system, method, apparatus, program, and recording medium shown in the claims, the description, and the drawings is particularly “before”. It should be noted that “preceding” or the like is not specified, and that the output of the previous process can be realized in any order unless it is used in the subsequent process. Regarding the operation flow in the claims, the specification, and the drawings, even if it is described using “first”, “next”, etc. for the sake of convenience, it means that it is essential to carry out in this order. It is not a thing.

DESCRIPTION OF SYMBOLS 100 Data transmission / reception system 110 Onboard equipment 111 Blocking detection part 112 Information acquisition part 113 Data transmission part 114 Transmission request part 115 Data reception part 116 Information processing part 130 IC tag 800 Computer 801 Host controller 802 CPU
803 RAM
804 Graphic controller 805 Display 806 Input / output controller 807 Communication interface 808 Hard disk drive 809 CD-ROM drive 810 ROM
811 Flexible disk drive 812 Input / output chip 891 Flexible disk 892 CD-ROM
B Battery R Leader V Car

Claims (5)

A data transmission / reception system in which an in-vehicle device transmits / receives data,
Onboard equipment that performs information processing related to automobiles;
When activated by receiving power supplied from the in-vehicle device, data is received and stored from the on-vehicle device, and when activated by receiving a radio wave transmitted from a reader, the stored data is An IC tag for transmission to a reader,
The in-vehicle device is
When the power supply to its own device is cut off,
When the shut-off detection unit detects that power supply to the own device is shut off, obtains status data indicating the situation when the power supply to the own device is shut off from the car computer of the car, According to the situation indicated by the situation data, an information acquisition unit that acquires information to be referred to in a situation where the device is not activated from a device provided in the automobile;
A data transmission / reception system comprising: a data transmission unit configured to transmit data indicating information acquired by the information acquisition unit to the IC tag. A data transmission / reception method in which an in-vehicle device that performs information processing on a vehicle transmits and receives data,
When the on-vehicle device is cut off from the power supply to its own device, a cut-off detection stage for detecting that fact,
When the in-vehicle device detects that the power supply to the own device has been cut off in the cut-off detection stage, the vehicle data of the vehicle is used to indicate the situation data indicating the situation when the power supply to the own device is cut off. An information acquisition step of acquiring from a device provided in the vehicle, the information to be referred to in a situation where the own device is not activated, according to the situation indicated by the situation data, while obtaining from the computer,
When activated by receiving power supplied from the in-vehicle device, data is received and stored from the on-vehicle device, and when activated by receiving a radio wave transmitted from a reader, the stored data is A data transmission / reception method comprising: a data transmission step in which the vehicle-mounted device transmits data indicating the information acquired in the information acquisition step to an IC tag transmitted to a reader. An in-vehicle device that performs information processing related to automobiles,
When the power supply to its own device is cut off,
When the shut-off detection unit detects that power supply to the own device is shut off, obtains status data indicating the situation when the power supply to the own device is shut off from the car computer of the car, According to the situation indicated by the situation data, an information acquisition unit that acquires information to be referred to in a situation where the device is not activated from a device provided in the automobile;
When activated by receiving power supplied from the on-vehicle device, data is received and stored from the on-vehicle device, and when activated by receiving a radio wave transmitted from a reader, the stored data is A vehicle-mounted device comprising: a data transmission unit configured to transmit data indicating information acquired by the information acquisition unit to an IC tag transmitted to a reader. A program that causes a computer to function as an in-vehicle device that performs information processing related to automobiles,
The computer,
When the power supply to its own device is cut off, a cut-off detection unit that detects that fact,
When the shut-off detection unit detects that power supply to the own device is shut off, obtains status data indicating the situation when the power supply to the own device is shut off from the car computer of the car, In accordance with the situation indicated by the situation data, an information acquisition unit that acquires information to be referred to in a situation where the own device is not activated from a device provided in the automobile,
When activated by receiving power supplied from the computer, data is received from the computer and stored. When activated by receiving radio waves transmitted from a reader, the stored data is transferred to the reader. A program that causes an IC tag to transmit to function as a data transmission unit that transmits data indicating information acquired by the information acquisition unit. A recording medium that records a program that causes a computer to function as an in-vehicle device that performs information processing related to an automobile,
The computer,
When the power supply to its own device is cut off, a cut-off detection unit that detects that fact,
When the shut-off detection unit detects that power supply to the own device is shut off, obtains status data indicating the situation when the power supply to the own device is shut off from the car computer of the car, In accordance with the situation indicated by the situation data, an information acquisition unit that acquires information to be referred to in a situation where the own device is not activated from a device provided in the automobile,
When activated by receiving power supplied from the computer, data is received from the computer and stored. When activated by receiving radio waves transmitted from a reader, the stored data is transferred to the reader. A recording medium on which a program that functions as a data transmission unit that transmits data indicating information acquired by the information acquisition unit to an IC tag to be transmitted is recorded.

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