JP7196678B2 - software writing system - Google Patents

Description

The present invention relates to a software writing system for writing software for vehicle control to an in-vehicle electronic controller.

In recent years, with the aim of reducing the cost of in-vehicle electronic control units (hereafter referred to as ECUs), ECUs (Electronic Control Units) consisting of common hardware have been installed in multiple types of vehicles. Software adapted to the type of vehicle is individually written in each ECU (see Patent Document 1, for example).

In this patent document 1, in a vehicle assembly process, a vehicle is individually recognized based on vehicle information received by a data writing device, and software to be written into the ECU is instructed through wireless communication, thereby writing software to the ECU. A system for doing so is disclosed.

JP 2005-202594 A

In the system disclosed in Patent Document 1, communication for individually recognizing vehicles and communication for writing software to ECUs are performed using a common communication protocol (wireless communication method).

The inventors of the present invention have found that this type of wireless communication includes cases where the amount of communication information (communication data amount) is small and cases where the amount of communication information is large. Therefore, we focused on the fact that there is room for improvement in order to efficiently perform this type of wireless communication.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to provide a software writing system capable of efficiently performing wireless communication when writing software for vehicle control into an in-vehicle electronic control unit. to provide.

The solution of the present invention for achieving the above object presupposes a software writing system for writing software for vehicle control into an onboard electronic controller. This software writing system includes an in-vehicle wireless terminal and an information processing device. The in-vehicle wireless terminal is connected to the in-vehicle electronic control device, acquires vehicle identification information of the vehicle in which it is mounted, wirelessly transmits it outside the vehicle, wirelessly receives written software from outside the vehicle, and transmits the written software to the in-vehicle electronic control device. write to The information processing device individually recognizes the vehicle based on the vehicle identification information wirelessly received from the vehicle-mounted wireless terminal, and wirelessly transmits write software to be written in the vehicle-mounted electronic control unit of the vehicle to the vehicle-mounted wireless terminal. Further, the in-vehicle radio terminal is capable of switching between a first radio system and a second radio system as a radio communication system, and the first radio system has a communication speed that is lower than that of the second radio system when the amount of communication information is small. and the second radio system has a higher communication speed than the first radio system when the amount of communication information is large. The in-vehicle wireless terminal has a predetermined relationship between the amount of communication information and the wireless communication method . A wireless communication method with the information processing device in the above is defined in advance as the first wireless method, and the information processing device when performing wireless communication with a large amount of communication information including wireless reception of the written software. A wireless communication method between the and is defined in advance as the second wireless method.

As an operation for writing software for vehicle control into the on-board electronic control device according to this specific item, the on-board wireless terminal acquires the vehicle identification information of the vehicle in which it is installed and wirelessly transmits the information to the outside of the vehicle. Then, the information processing device receives the vehicle identification information by radio, and the information processing device recognizes the vehicle individually based on the vehicle identification information, and writes software to be written to the on-board electronic control device of the vehicle to the on-board wireless terminal. Send wirelessly. The in-vehicle wireless terminal wirelessly receives the written software and writes the written software into the in-vehicle electronic control unit.

In this case, the in-vehicle wireless terminal wirelessly communicates with the information processing device by the first wireless method when performing wireless communication with a small amount of communication information including wireless transmission of the vehicle identification information to the outside of the vehicle. In addition, the in-vehicle wireless terminal wirelessly communicates with the information processing device by the second wireless method when performing wireless communication with a large amount of communication information including wireless reception of written software. The first radio system has a higher communication speed than the second radio system when the amount of communication information is small. Therefore, when performing wireless communication with a small amount of communication information including wireless transmission of vehicle identification information to the outside of the vehicle, wireless communication with the information processing device is performed by the first wireless method, and the information processing device is performed by the second wireless method. Wireless communication can be performed at a higher communication speed than in the case of performing wireless communication with. When performing wireless communication with a large amount of communication information including wireless reception of written software, wireless communication with the information processing apparatus is performed using the second wireless method, and wireless communication with the information processing apparatus is performed using the first wireless method. Wireless communication can be performed at a higher communication speed than the case. In this way, by switching the wireless communication method depending on whether the amount of communication information is small or large, wireless communication can be performed efficiently, and the time required to write software to the in-vehicle electronic control unit can be shortened. can be done.
Further, specifically, as the radio system, the first radio system is an original radio system in which the communication target of the in-vehicle radio terminal is defined as only the information processing device, and the second radio system is a communication system between unspecified devices. Wifi communication is available.
Further, a production instruction device in which the vehicle identification information is written is mounted on the vehicle, the vehicle identification information is taken into the information processing device from the production instruction device, and the vehicle identification information is sent from the information processing device. The information obtained by linking the vehicle identification information received by the in-vehicle wireless terminal by radio transmission to the in-vehicle wireless terminal by the first wireless method and the individual identification information of the in-vehicle wireless terminal stored in advance. is wirelessly transmitted to the information processing device by a first wireless method, and the information processing device selects the written software that matches the vehicle identification information included in the received linked information, and sends the written software , to the vehicle-mounted wireless terminal corresponding to the individual identification information included in the linked information, using the second wireless method.

In the present invention, in wireless communication between an in-vehicle wireless terminal and an information processing device when software for vehicle control is written into an in-vehicle electronic control device, the first wireless method has a high communication speed when the amount of communication information is small. and a second wireless method with a high communication speed when the amount of communication information is large. When performing wireless communication with a large amount of communication information, wireless communication is performed between the in-vehicle wireless terminal and the information processing device by the second wireless method. In this way, by switching the wireless communication method depending on whether the amount of communication information is small or large, wireless communication can be performed efficiently, and the time required to write software to the in-vehicle electronic control unit can be shortened. can be done.

1 is a diagram showing a schematic configuration of a software writing system according to an embodiment; FIG. 1 is a block diagram showing a schematic configuration of an in-vehicle wireless terminal and an information processing device; FIG. FIG. 3 is a diagram for explaining an outline of communication operations between a production instruction device, an in-vehicle wireless terminal, and an information processing device; FIG. 4 is a diagram for explaining characteristics of Wifi communication and original wireless communication; FIG. 2 is a sequence diagram for explaining mutual transmission and reception of information among a production instruction device, a vehicle diagnostic communication device, a signal conversion station, an antenna, an in-vehicle wireless terminal, a software writing management device, a Wifi antenna, and an ECU; It is a figure for demonstrating the outline of an inspection process.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present embodiment describes a case where the present invention is applied to a software writing system that writes software for vehicle control into an ECU (vehicle electronic control unit) in an automobile production line.

- Outline configuration of software writing system -
FIG. 1 is a diagram showing a schematic configuration of a software writing system 1 according to this embodiment. FIG. 2 is a block diagram showing a schematic configuration of the in-vehicle wireless terminal 2 and the information processing device 3 that constitute the software writing system 1. As shown in FIG. FIG. 3 is a diagram for explaining an outline of communication operations between the production instruction device 4, the on-vehicle wireless terminal 2, and the information processing device 3. As shown in FIG.

As an overview of the operation of writing software to the ECU 5 by the software writing system 1 according to the present embodiment, the serial information (vehicle No.), which is the individual identification information of the vehicle read from the production instruction device 4, is read from the vehicle of the information processing device 3. Information (hereinafter referred to as linking information) is wirelessly transmitted to the information processing device 3 . Then, this linking information is output from the vehicle diagnostic communication device 6 of the information processing device 3 to the software writing management device 7, and the software writing management device 7 individually recognizes the vehicle based on this linking information, software (writing software) to be written in the ECU 5 in , is wirelessly transmitted to the in-vehicle wireless terminal 2 . Then, the in-vehicle wireless terminal 2 wirelessly receives this software and writes the software into the ECU 5 .

A vehicle V1 in FIG. 1 shows a state in which wireless communication is performed between the in-vehicle wireless terminal 2 and the vehicle diagnostic communication device 6 of the information processing device 3. FIG. Vehicle V2 is in a state in which wireless communication is being performed between the in-vehicle wireless terminal 2 and the software writing management device 7 of the information processing device 3, and software is being wirelessly transmitted to the in-vehicle wireless terminal 2. ing. Further, the vehicle V3 is in a state of performing wireless communication between the in-vehicle wireless terminal 2 and the software writing management device 7 of the information processing device 3, and wirelessly transmits information on the software writing status to the software writing management device 7. This indicates that the

Schematic configurations of the production instruction device 4, the in-vehicle wireless terminal 2, and the information processing device 3 will be described below.

(Production instruction device)
As shown in FIGS. 2 and 3, the production instruction device 4 is composed of an RFID tag attached to the vehicle (attached to the roof panel in this embodiment). The serial information is written in the production instruction device 4 . By reading the production instruction device 4 with a tag reader 31 connected to the vehicle diagnostic communication device 6 of the information processing device 3, the serial information is taken into the vehicle diagnostic communication device 6 of the information processing device 3. It's becoming The serial information captured by the information processing device 3 is wirelessly transmitted to the vehicle-mounted wireless terminal 2 . A signal conversion station 32 and an antenna 33 are connected to the vehicle diagnostic communication device 6 of the information processing device 3 . That is, after the serial information is converted by the signal conversion station 32 into a form that can be wirelessly transmitted, it is wirelessly transmitted to the in-vehicle wireless terminal 2 by the antenna 33 .

(In-vehicle wireless terminal)
The in-vehicle wireless terminal 2 is mounted on a vehicle that is being transported on a production line. It is a device that In other words, it is configured such that an electronic device constituting each functional part described later is housed inside a housing that is large enough to be placed on the floor of the vehicle. The task of placing the in-vehicle wireless terminal 2 on the floor of the vehicle interior may be performed by an operator, or may be automatically placed on the floor of the vehicle interior by a robot.

As shown in FIG. 2, the in-vehicle wireless terminal 2 includes a serial information reception unit 21, a serial information registration unit 22, an IP information storage unit 23, a linking information transmission unit 24, a software reception unit 25, and a progress output unit 26. ing.

The serial information receiver 21 is a functional part that receives serial information wirelessly transmitted by the antenna 33 . The serial information registration section 22 is a section in which the serial information received by the serial information reception section 21 is registered.

The IP information storage unit 23 stores IP information, which is individual identification information of the in-vehicle wireless terminal 2 . For this reason, individual IP information is stored in the IP information storage unit 23 of each on-vehicle wireless terminal 2 mounted on each of a plurality of vehicles transported on the automobile production line.

The linking information transmission unit 24 links the IP information stored in the IP information storage unit 23 and the serial information (vehicle individual identification information) wirelessly received from the vehicle diagnostic communication device 6 of the information processing device 3 . It is a functional part that attaches and wirelessly transmits the linking information.

The software receiving unit 25 is a functional part that wirelessly receives software wirelessly transmitted from the software writing management device 7 of the information processing device 3 .

The progress status output unit 26 has a function of wirelessly transmitting the software writing status (information such as the amount of software written to the ECU 5) to the information processing device 3 at predetermined time intervals during the operation of writing software to the ECU 5, which will be described later. part.

A feature of this in-vehicle wireless terminal 2 is that the wireless transmission method (wireless communication method) performed with the information processing device 3 can be switched between the first wireless method and the second wireless method. at the point.

The first radio system has a higher communication speed than the second radio system when the amount of communication information is small. On the other hand, the second radio system has a higher communication speed than the first radio system when the amount of communication information is large. Specifically, the first wireless system is an original wireless system, and the second wireless system is a Wifi (Wireless Fidelity) communication system (hereinafter simply referred to as Wifi communication). The original wireless system referred to here is a wireless system specialized for this software writing system 1, in which the communication target (communication partner) in the vehicle-mounted wireless terminal 2 is defined as only the information processing device 3, and the communication in the information processing device 3 The target is defined as only the in-vehicle wireless terminal 2 .

The serial information receiving unit 21 and the linking information transmitting unit 24 are parts that perform wireless communication with the information processing device 3 by the first wireless method (original wireless method), and these constitute an original wireless module. doing. The software receiving unit 25 and the progress output unit 26 are parts that perform wireless communication with the information processing device 3 by the second wireless method (Wifi communication), and these constitute a Wifi wireless module.

(Vehicle diagnosis communication device)
The vehicle diagnostic communication device 6 includes a serial information acquisition section 61 , a serial information output section 62 , a linking information receiving section 63 and a linking information output section 64 .

The serial information acquisition unit 61 is a functional part that acquires the serial information read by the tag reader 31 as described above. The serial information output unit 62 is a functional part that receives the serial information acquired by the serial information acquisition unit 61 and outputs this serial information to the signal conversion station 32 .

The linking information receiving unit 63 is a functional part that receives the linking information wirelessly transmitted from the linking information transmitting unit 24 of the in-vehicle wireless terminal 2 via the antenna 33 and the signal conversion station 32 . At this time, the signal conversion station 32 converts the linking information received by the antenna 33 into a format that the linking information receiving unit 63 can acquire.

The linking information output unit 64 is a functional part that outputs the linking information received by the linking information receiving unit 63 to the software writing management device 7 . In other words, the vehicle diagnostic communication device 6 and the software writing management device 7 are connected by a signal line, and the linking information is output from the linking information output section 64 to the software writing management device 7 through this signal line. ing.

(software writing management device)
The software writing management device 7 includes a linking information receiving section 71 , a software selecting section 72 , a software output section 73 , a database DB, and a progress judging section 74 .

The linking information receiving unit 71 is a functional part that receives the linking information output from the linking information output unit 64 as described above.

The database DB stores software (software for vehicle control) suitable for each of a plurality of types of vehicles. The software selection unit 72 receives the tying information from the tying information receiving unit 71, and selects software that matches the serial information included in the tying information from various software stored in the database DB. to extract.

The software output unit 73 receives the software selected by the software selection unit 72 from the software selection unit 72 and wirelessly transmits the received software to the in-vehicle wireless terminal 2 having serial information corresponding to the software. Specifically, a Wifi antenna 34 is connected to the software writing management device 7 , and the software output from the software output unit 73 is output to the Wifi antenna 34 . wirelessly transmitted to

The progress determination unit 74 receives information on the software writing state (progress) transmitted at predetermined time intervals from the progress output unit 26 of the in-vehicle wireless terminal 2, and determines whether the software is properly written. It is a functional part that determines whether

－Wireless communication method－
Next, a wireless communication system, which is a feature of this embodiment, will be described.

Wireless transmission between the in-vehicle wireless terminal 2 and the information processing device 3 includes wireless transmission of serial information from the in-vehicle diagnostic communication device 6 of the information processing device 3 to the in-vehicle wireless terminal 2, as described above. Wireless transmission of linking information from the terminal 2 to the vehicle diagnostic communication device 6 of the information processing device 3, wireless transmission of software from the software writing management device 7 of the information processing device 3 to the vehicle-mounted wireless terminal 2, and information from the vehicle-mounted wireless terminal 2 There is wireless transmission of information on the software writing status to the software writing management device 7 of the processing device 3 .

As described above, the wireless transmission method (wireless communication method) between the in-vehicle wireless terminal 2 and the information processing device 3 includes the first wireless method (original wireless method) and the second wireless method (Wi-Fi communication). ) can be switched. The first radio system has a higher communication speed than the second radio system when the amount of communication information is small. On the other hand, the second radio system has a higher communication speed than the first radio system when the amount of communication information is large.

FIG. 4 is a diagram for explaining characteristics of Wifi communication and original wireless communication. As is clear from FIG. 4, the Wi-Fi communication has a higher communication speed than the original wireless communication when the amount of communication information is large. In addition, original wireless communication has a higher communication speed than Wifi communication when the amount of communication information is small.

Also, since the original wireless system is a wireless system specialized for this software writing system 1, the time required for pairing between the in-vehicle wireless terminal 2 and the information processing device 3 is communication that enables pairing between devices). Since this pairing and transmission/reception of information for the pairing are well known, description thereof will be omitted here.

The above-mentioned four types of communication, that is, wireless transmission of serial information from the vehicle diagnostic communication device 6 of the information processing device 3 to the vehicle-mounted wireless terminal 2, and the connection from the vehicle-mounted wireless terminal 2 to the vehicle diagnostic communication device 6 of the information processing device 3 Wireless transmission of attachment information, wireless transmission of software from the software writing management device 7 of the information processing device 3 to the in-vehicle wireless terminal 2, information on the software writing status from the in-vehicle wireless terminal 2 to the software writing management device 7 of the information processing device 3 wireless transmission of the serial information from the vehicle diagnostic communication device 6 of the information processing device 3 to the in-vehicle wireless terminal 2, and the linking from the in-vehicle wireless terminal 2 to the vehicle diagnostic communication device 6 of the information processing device 3 Wireless transmission of information involves a relatively small amount of communication information. On the other hand, wireless transmission of software from the software writing management device 7 of the information processing device 3 to the in-vehicle wireless terminal 2 and information on the software writing status from the in-vehicle wireless terminal 2 to the software writing management device 7 of the information processing device 3 , the amount of communication information is relatively large.

In view of this point, in the present embodiment, wireless transmission of serial information from the vehicle diagnostic communication device 6 of the information processing device 3 to the in-vehicle wireless terminal 2 and from the in-vehicle wireless terminal 2 to the vehicle diagnostic communication device 6 of the information processing device 3 are performed. For the wireless transmission of the linking information to , wireless communication is performed between the in-vehicle wireless terminal 2 and the information processing device 3 by the first wireless method (original wireless method). On the other hand, wireless transmission of software from the software writing management device 7 of the information processing device 3 to the in-vehicle wireless terminal 2 and information on the software writing status from the in-vehicle wireless terminal 2 to the software writing management device 7 of the information processing device 3 For the wireless transmission, wireless communication is performed between the in-vehicle wireless terminal 2 and the information processing device 3 by the second wireless method (Wi-Fi communication).

- Software write operation -
Next, the operation of writing software to the ECU 5 will be described.

FIG. 5 is for explaining transmission and reception of information between the production instruction device 4, the vehicle diagnostic communication device 6, the signal conversion station 32, the antenna 33, the vehicle-mounted radio terminal 2, the software writing management device 7, the Wifi antenna 34, and the ECU 5. is a sequence diagram of.

First, the serial information written in the production instruction device 4 is read by the vehicle diagnostic communication device 6 of the information processing device 3 (transmitting operation A in FIG. 5).

The read serial information is output from the vehicle diagnostic communication device 6 to the antenna 33 via the signal conversion station 32 (transmitting operation B in FIG. 5), and is wirelessly transmitted from the antenna 33 to the vehicle-mounted wireless terminal 2. (Transmission operation C in FIG. 5). The wireless transmission method at this time is the first wireless method (original wireless method) because the transmitted information is serial information and the amount of communication information is small.

After that, the linking information is wirelessly transmitted from the in-vehicle wireless terminal 2 (transmitting operation D in FIG. 5), and this linking information is transmitted to the vehicle diagnostic communication device 6 via the antenna 33 and the signal conversion station 32 (see FIG. 5). E). The method of wireless transmission (transmission operation D) at this time is the first wireless method (original wireless method) because the information to be transmitted is the linking information and the amount of communication information is small.

Then, this linking information is output from the vehicle diagnostic communication device 6 to the software writing management device 7 (transmitting operation F in FIG. 5). A software writing instruction signal is also sent to the software writing management device 7 together with this linking information.

Upon receiving these signals, the software writing management device 7 selects software that matches the serial information included in the linking information from various software stored in the database DB, and sends the software to the Wifi antenna 34. Output. The Wifi antenna 34 wirelessly transmits the received software to the in-vehicle wireless terminal 2 (transmitting operation G in FIG. 5). The method of wireless transmission at this time is the second wireless method (Wifi communication) because the information to be transmitted is software and the amount of communication information is large.

The in-vehicle radio terminal 2 sequentially writes the software received by radio into the ECU 5 (transmitting operation H in FIG. 5). At this time, information on the progress of software writing is transmitted from the in-vehicle wireless terminal 2 to the Wifi antenna 34 at predetermined time intervals (transmitting operation I in FIG. 5). The wireless transmission method for transmitting this progress information is the second wireless method (Wi-Fi communication).

When the output of the software from the software writing management device 7 is completed and the writing of the software from the in-vehicle wireless terminal 2 to the ECU 5 is completed, this operation ends.

Such an operation is performed for each vehicle conveyed on the production line, so that software suitable for each type of vehicle is individually written in each ECU (ECU installed in each vehicle) 5. It will be lost.

- Effects of the embodiment -
As described above, in the present embodiment, the in-vehicle wireless terminal 2 performs wireless communication with the information processing device 3 by the first wireless method (original wireless method) when performing wireless communication with a small amount of communication information. conduct. Further, the in-vehicle wireless terminal 2 wirelessly communicates with the information processing device 3 by the second wireless method (Wi-Fi communication) when performing wireless communication with a large amount of communication information. The first wireless method has a higher communication speed than the second wireless method when the amount of communication information is small. Therefore, when wireless communication with a small amount of communication information is performed, wireless communication with the information processing device 3 by the first wireless method results in higher cost than wireless communication with the information processing device 3 by the second wireless method. Wireless communication can be performed at the communication speed. Further, when performing wireless communication with a large amount of communication information, by performing wireless communication with the information processing device 3 by the second wireless method, communication with the information processing device 3 is performed using the first wireless method. Wireless communication can be performed at high speed. In this way, by switching the wireless communication method depending on whether the amount of communication information is small or large, wireless communication can be performed efficiently, and the time required to write software to the ECU 5 can be shortened.

In addition, a series of wireless communications such as acquisition of vehicle identification information (serial information), wireless transmission of software to the in-vehicle wireless terminal 2, writing of software to the ECU 5, and transmission of progress information to the software writing management device 7 are automatically performed. Therefore, the number of man-hours required for writing software to the ECU 5 can be reduced.

In addition, since transmission and reception of information between the in-vehicle wireless terminal 2 and the information processing device 3 are all performed by wireless communication, the amount of signal lines required for the software writing system 1 can be greatly reduced. does not interfere with the worker's work.

-Inspection process-
The vehicle diagnostic communication device 6 of the information processing device 3 in the above-described embodiment can also be used in the inspection process after the writing of the software to the ECU 5 is completed. A specific description will be given below.

FIG. 6 is a diagram for explaining the outline of the inspection process. As shown in FIG. 6, in the inspection process, radio communication is performed between the in-vehicle radio terminal 2 and the in-vehicle diagnostic communication device 6 of the information processing device 3 to determine whether or not the software has been correctly written in the ECU 5. Inspections and inspections of other functional systems in the vehicle will be carried out. For example, the vehicle-mounted wireless terminal 2 reads a control program or the like stored in the ECU 5 and wirelessly transmits it to the information processing device 3 to perform the inspection. The wireless transmission method at this time is the first wireless method (original wireless method).

In this way, the inspection process can be performed by effectively using the in-vehicle wireless terminal 2 mounted on the vehicle after the assembly process is finished. Further, since the vehicle diagnostic communication device 6 of the information processing device 3 can be used as a device used in the inspection process, it is possible to reduce the cost of equipment in the entire automobile production line.

-Other embodiments-
It should be noted that the present invention is not limited to the above-described embodiments, and all modifications and applications within the scope of the claims and their equivalents are possible.

For example, in the above-described embodiment, the second wireless method (Wi-Fi communication) is used as the wireless transmission method for transmitting information on the progress of software writing from the in-vehicle wireless terminal 2 to the Wifi antenna 34. When the amount of communication information is relatively small, the first wireless method (original wireless method) may be used as the wireless transmission method.

In the above-described embodiment, as means for the in-vehicle wireless terminal 2 to acquire the serial information, which is the individual identification information of the vehicle, the serial information received by the vehicle diagnostic communication device 6 of the information processing device 3 is received by the serial information receiving unit. 21 was supposed to receive it. The present invention is not limited to this, and serial information may be obtained by connecting a tag reader to the in-vehicle wireless terminal 2 and reading the production instruction device 4 with this tag reader.

Further, in the above-described embodiment, the software writing status information is wirelessly transmitted to the information processing device 3 at predetermined time intervals during the operation of writing software to the ECU 5 . The present invention is not limited to this, and information to that effect may be wirelessly transmitted to the information processing device 3 after the operation of writing software to the ECU 5 is completed.

INDUSTRIAL APPLICABILITY The present invention is applicable to a software writing system for writing software for vehicle control into an ECU mounted on a vehicle.

1 Software writing system 2 In-vehicle wireless terminal 21 Serial information reception unit 22 Serial information registration unit 24 Linking information transmission unit 25 Software reception unit 3 Information processing device 31 Tag reader 33 Antenna 34 Wifi antenna 4 Production instruction device 5 ECU (In-vehicle electronic control device )
6 vehicle diagnostic communication device 61 serial information acquisition unit 62 serial information output unit 63 linking information receiving unit 64 linking information output unit 7 software writing management device 71 linking information receiving unit 72 software selection unit 73 software output unit

Claims (3)

In a software writing system for writing software for vehicle control to an in-vehicle electronic control device,
An in-vehicle wireless terminal that is connected to the in-vehicle electronic control unit, acquires vehicle identification information of the vehicle in which it is mounted, wirelessly transmits it outside the vehicle, wirelessly receives written software from outside the vehicle, and writes the written software into the in-vehicle electronic control unit. When,
an information processing device that individually recognizes a vehicle based on the vehicle identification information wirelessly received from the in-vehicle wireless terminal, and wirelessly transmits to the in-vehicle wireless terminal write software to be written in the in-vehicle electronic control device in the vehicle;
The in-vehicle wireless terminal can switch between a first wireless method and a second wireless method as a wireless communication method, and the first wireless method has a communication speed when the amount of communication information is small compared to the second wireless method. and the second wireless method has a higher communication speed than the first wireless method when the amount of communication information is large,
The in-vehicle wireless terminal has a predetermined relationship between the amount of communication information and the wireless communication method . A wireless communication method with the information processing device is predetermined as the first wireless method, and wireless communication with the information processing device includes wireless reception of the written software and a large amount of communication information. A software writing system, wherein a wireless communication method between the two is defined in advance as the second wireless method. The software writing system of claim 1, wherein
The first wireless method is an original wireless method that defines that only the information processing device is to be communicated with the in-vehicle wireless terminal, and the second wireless method is Wi-Fi communication that enables communication between unspecified devices. A software writing system characterized by: 3. The software writing system according to claim 1 or 2,
A production instruction device in which the vehicle identification information is written is mounted on the vehicle,
the vehicle identification information is taken into the information processing device from the production instruction device, and the vehicle identification information is wirelessly transmitted from the information processing device to the vehicle-mounted wireless terminal by the first wireless method;
the in-vehicle wireless terminal wirelessly transmits information linking the received vehicle identification information and pre-stored individual identification information of the in-vehicle wireless terminal to the information processing device by the first wireless method;
The information processing device selects the written software that matches the vehicle identification information included in the received linked information, and applies the written software to the individual identification information included in the linked information. A software writing system, characterized in that the information is wirelessly transmitted to the in-vehicle wireless terminal corresponding to the information by the second wireless method.

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