WO2019221058A1 - Vehicle-mounted relay device, communication system, bus determination method, and computer program - Google Patents

Abstract

This vehicle-mounted relay device, which is connected to a plurality of buses and transmits data to communication devices connected to the buses, comprises: a receiving unit that receives a plurality of sets of data to be transmitted to the plurality of communication devices; an assessing unit that assesses whether the destination of the received data is a first communication device connected to one bus or a second communication device connected to two or more buses; and a determination unit that determines a bus to be used for transmission of the received data on the basis of the assessment result of the assessing unit.

Description

In-vehicle relay device, communication system, bus determination method, and computer program

The present invention relates to an in-vehicle relay device, a communication system, a bus determination method, and a computer program.
This application claims priority based on Japanese Patent Application No. 2018-93312 filed on May 14, 2018, and incorporates all the description content described in the above Japanese application.

Conventionally, the program or data stored in the storage unit of the ECU of the vehicle needs to be updated to be rewritten with a new program or data, for example, when there is a need for function addition, defect correction, version upgrade, or the like. Yes, an update program or data is transmitted to the ECU to be updated by a communication line.

On the other hand, in Patent Literature 1, when an update file is received regarding the update of an in-vehicle program by radio, the current vehicle load state is a low load state in which a program corresponding to the update file can be updated, or this program is If it is determined whether it is a non-updatable high load state and it is determined that the load is low, the program corresponding to the update file is updated, and if it is determined that the load is high, the current vehicle An in-vehicle program update device that changes a load state to a low load state is disclosed.

JP 2014-106875 A

In the in-vehicle relay device according to one aspect of the present disclosure, a plurality of buses are connected, and in the in-vehicle relay device that transmits data to the communication device connected to the bus, the plurality of data to be transmitted to the plurality of communication devices A receiving unit that receives data, a determination unit that determines whether a transmission destination of received data is a first communication device connected to one bus or a second communication device connected to two or more buses, and And a determination unit that determines a bus to be used for transmission of each received data based on the determination result of the determination unit.

A communication system according to an aspect of the present disclosure is a communication system including an information processing device and an in-vehicle relay device that is connected to a plurality of buses and transmits data to the communication device connected to the bus. For a plurality of transmission data to be transmitted to a plurality of communication devices, a transmission destination is a first communication device connected to one bus of the in-vehicle relay device, or two or more buses of the in-vehicle relay device A determination unit that determines whether the second communication device is connected; a determination unit that determines a bus used for transmission of each transmission data by the in-vehicle relay device based on a determination result of the determination unit; and the determination An adder for attaching the bus data representing the bus determined by the transmission unit to each transmission data, and a transmission unit for transmitting the plurality of transmission data to which the bus data is attached to the in-vehicle relay device. The vehicle relay device includes a receiver which receives the plurality of transmitted data from the information processing apparatus, on the basis of the bus data attached to the transmission data, and transmits the transmission data to the communication device.

A bus determination method according to an aspect of the present disclosure includes a bus that determines a bus to be used for transmitting the data in an in-vehicle relay device that is connected to a plurality of buses and transmits data to a communication device connected to the bus. In the determination method, a plurality of data to be transmitted to a plurality of communication devices are received, and a transmission destination of the received data is a first communication device connected to one bus, or a second connected to two or more buses. Determining whether the communication device is used, and determining a bus to be used for transmission of each received data based on the result of the determination.

A computer program according to an aspect of the present disclosure has a plurality of buses connected thereto, and receives a plurality of data to be transmitted to the plurality of communication devices to a computer that transmits data to the communication devices connected to the bus, It is determined whether the destination of the received data is a first communication device connected to one bus or a second communication device connected to two or more buses, and based on the result of the determination, A process for determining a bus used for transmission of received data is executed.

1 is a block diagram illustrating a main configuration of a vehicle according to a first embodiment. In the vehicle-mounted relay apparatus which concerns on this embodiment, it is a conceptual diagram which shows notionally the LUT which a memory | storage part memorize | stores. In the vehicle-mounted relay apparatus which concerns on this embodiment, it is a conceptual diagram which shows notionally an example of the table of a "decision list" before a bus determination process. It is a functional block diagram which shows the principal part structure of a control part in the vehicle-mounted relay apparatus concerning this embodiment. In the in-vehicle relay device concerning this embodiment, it is a flow chart explaining the bus decision processing by a control part. It is a conceptual diagram which shows notionally the example of writing of the table of "decision list" in the bus determination process which concerns on this embodiment. It is a conceptual diagram which shows notionally the example of writing of the table of "decision list" in the bus determination process which concerns on this embodiment. It is a block diagram which shows the principal part structure of the vehicle-mounted communication system which concerns on Embodiment 2. FIG. It is a functional block diagram which shows the principal part structure of the control part of a server apparatus in the vehicle-mounted communication system which concerns on this embodiment. In the in-vehicle communication system concerning this embodiment, it is a flowchart explaining the processing in which the control part of a server apparatus transmits the program for updating.

[Problems to be solved by the present disclosure]
In the in-vehicle program update device of Patent Literature 1, when the current vehicle load state is a high load state, the program is not updated, and another change is made to change the current vehicle load state to a low load state. There is a risk that the update of the program may be delayed due to the above processing.

Therefore, an object of the present invention is to provide an in-vehicle relay device, a communication system, a bus determination method, and a computer program capable of transmitting data within the shortest time when transmitting a plurality of data to a plurality of transmission destinations. And

[Effects of the present disclosure]
According to one aspect of the present disclosure, when a plurality of data is transmitted to a plurality of transmission destinations, it is possible to suppress overlapping of used buses as much as possible, and therefore, program update or the like can be performed within the shortest time.

[Description of Embodiment of the Present Invention]
First, embodiments of the present disclosure will be listed and described. Moreover, you may combine arbitrarily at least one part of embodiment described below.

(1) In the in-vehicle relay device according to one aspect of the present disclosure, a plurality of buses are connected, and in the in-vehicle relay device that transmits data to the communication device connected to the bus, a plurality of devices to be transmitted to the plurality of communication devices And a determination unit that determines whether the reception destination of the received data is a first communication device connected to one bus or a second communication device connected to two or more buses. And a determination unit that determines a bus used for transmission of each received data based on the determination result of the determination unit.

In this aspect, when the reception unit receives a plurality of data to be transmitted to a plurality of communication devices, the determination unit determines whether the transmission destination of the reception data is the first communication device or the first communication device. It determines whether it is 2 communication apparatuses, and the said determination part determines the bus | bath used for transmission of each received data based on the determination result of the said determination part.
For example, when it is determined that the transmission destination of the reception data is the second communication device, the bus that is not used for transmission of other reception data among the two or more buses connected to the second communication device is determined. Department selects. Therefore, when transmitting a plurality of received data to a plurality of transmission destinations, the transmission time to the transmission destination can be shortened.

(2) The in-vehicle relay device according to an aspect of the present disclosure includes a storage unit that stores each communication device in association with a bus to which each communication device is connected, and the determination unit stores the content stored in the storage unit. Based on this, the determination is made.

In this aspect, when the reception unit receives a plurality of data to be transmitted to a plurality of communication devices, the determination unit performs the determination described above, and the determination unit determines the determination result of the determination unit and Based on the storage contents of the storage unit, the bus used for transmission of each received data is determined.
For example, when it is determined that the transmission destination of the received data is the second communication device, the determination unit determines whether two or more of the second communication devices are connected based on the storage content of the storage unit. A bus that is not used for transmission of other received data is selected from the buses. Therefore, when transmitting a plurality of reception data to a plurality of transmission destinations, it is possible to shorten the transmission time of the reception data to the transmission destination.

(3) In the in-vehicle relay device according to one aspect of the present disclosure, the determination unit preferentially determines a bus used for transmission of reception data whose transmission destination is the first communication device, and the storage unit A correspondence relationship in which one bus determined by the determination unit is associated with a transmission destination of received data transmitted using the one bus is stored.

In this aspect, the bus used for the transmission of the reception data whose transmission destination is the first communication device is preferentially determined, and the determined bus is associated with the transmission destination of the corresponding reception data. The storage unit stores the correspondence relationship.
In this way, the bus used for transmission to the first communication device that cannot select the bus is determined with priority, and then the bus used for transmission to the second communication device that can select the bus is already determined. It is decided not to overlap as much as possible. Accordingly, it is possible to more effectively suppress duplication of buses used for transmission of received data.

(4) In the in-vehicle relay device according to one aspect of the present disclosure, when the transmission destination of the reception data is the second communication device, the determination unit is a bus having no corresponding transmission destination based on the correspondence relationship. Is determined as the bus used for transmission.

In this aspect, the determination unit determines a bus related to received data whose destination is the first communication device, and then determines a bus related to received data whose destination is the second communication device. decide. At this time, in the correspondence relationship stored in the storage unit at that time, the determination unit uses a bus having no corresponding transmission destination among two or more buses connected to the second communication device as a bus used for transmission. decide.
Therefore, when transmitting a plurality of reception data to a plurality of transmission destinations, it is possible to suppress the overlapping of the buses used as much as possible, and the transmission time of the reception data to the transmission destination can be shortened.

(5) In the in-vehicle relay device according to an aspect of the present disclosure, when there is no bus having no corresponding transmission destination, the determination unit determines a bus having the smallest corresponding transmission destination as a bus used for transmission.

In this aspect, the determination unit determines a bus related to received data whose destination is the first communication device, and then determines a bus related to received data whose destination is the second communication device. decide. At this time, if there is no bus having no corresponding destination among the two or more buses connected to the second communication device in the correspondence relationship at that time, the determining unit transmits the bus having the smallest corresponding destination. It is determined as a bus to be used for.
Therefore, when transmitting a plurality of reception data to a plurality of transmission destinations, it is possible to suppress the overlapping of the buses used as much as possible, and the transmission time of the reception data to the transmission destination can be shortened.

(6) A communication system according to an aspect of the present disclosure is the communication system including an information processing device and an in-vehicle relay device that is connected to a plurality of buses and transmits data to the communication device connected to the bus. The processing device is configured such that a plurality of transmission data to be transmitted to a plurality of communication devices is a first communication device connected to one bus of the in-vehicle relay device, or two or more of the in-vehicle relay devices A determination unit that determines whether the second communication device is connected to the bus, and a determination unit that determines a bus used for transmission of each transmission data by the in-vehicle relay device based on a determination result of the determination unit An adding unit that attaches bus data representing the bus determined by the determining unit to each transmission data; and a transmission unit that transmits the plurality of transmission data to which the bus data is attached to the in-vehicle relay device. Cage, the in-vehicle relay device includes a receiver which receives the plurality of transmitted data from the information processing apparatus, on the basis of the bus data attached to the transmission data, and transmits the transmission data to the communication device.

In this aspect, the information processing apparatus determines whether the transmission destination is the first communication apparatus or the second communication apparatus for a plurality of transmission data, and determines the result of the determination. Based on this, the bus used for transmission of each transmission data by the in-vehicle relay device is determined, and the bus data representing the determined bus is attached to each transmission data and transmitted to the in-vehicle relay device. The in-vehicle relay device receives the plurality of transmission data from the information processing device, and transmits the transmission data to the communication device based on bus data attached to the transmission data.
For example, when it is determined that the transmission destination of the transmission data is the second communication device, the information processing device selects a bus that is not used for transmission of other transmission data. Therefore, when transmitting a plurality of transmission data to a plurality of transmission destinations, the transmission time to the transmission destination can be shortened.
Further, as described above, since the information processing device performs the process of determining the bus, the processing load on the in-vehicle relay device is reduced, and the transmission data is quickly processed in the in-vehicle relay device.

(7) In the communication system according to an aspect of the present disclosure, the information processing device includes a storage unit that stores each communication device in association with the bus of the in-vehicle relay device to which the communication device is connected, The determination unit performs the determination based on the storage content of the storage unit.

In this aspect, when transmitting a plurality of transmission data to the in-vehicle relay device, the information processing device determines whether the transmission destination is the first communication device or the second communication device for each transmission data. The bus used for transmission by the in-vehicle relay device is determined based on the result of the determination and the contents stored in the storage unit.
For example, when it is determined that the transmission destination of the transmission data is the second communication device, the information processing device is connected to the two or more connected to the second communication device based on the storage content of the storage unit. A bus that is not used for transmitting other transmission data is selected from the buses. Therefore, when the in-vehicle relay device transmits a plurality of transmission data to a plurality of transmission destinations, it is possible to shorten the transmission time of the transmission data to the transmission destinations.

(8) In the communication system according to an aspect of the present disclosure, the determination unit prioritizes determination of a bus used for transmission by the in-vehicle relay device with respect to transmission data whose transmission destination is the first communication device. The storage unit stores a correspondence relationship in which one bus determined by the determination unit is associated with a transmission destination of transmission data transmitted by the in-vehicle relay device using the one bus.

In this aspect, the bus used for transmission of transmission data whose transmission destination is the first communication device is preferentially determined, and the determined bus is associated with the transmission destination of the corresponding transmission data. The storage unit stores the corresponding relationship.
In this way, the bus used for transmission to the first communication device that cannot select the bus is determined with priority, and then the bus used for transmission to the second communication device that can select the bus is already determined. It is decided not to overlap as much as possible. Therefore, duplication of buses used for transmission of transmission data can be more effectively suppressed.

(9) In the communication system according to an aspect of the present disclosure, when the transmission destination of the transmission data is the second communication device, the determination unit uses a bus having no corresponding transmission destination based on the correspondence relationship. The bus is used for transmission by the in-vehicle relay device.

In this aspect, the determination unit determines a bus related to transmission data whose transmission destination is the first communication device, and then determines a bus related to transmission data whose transmission destination is the second communication device. decide. At this time, in the correspondence relationship stored in the storage unit at that time, the determination unit uses a bus having no corresponding transmission destination among two or more buses connected to the second communication device as a bus used for transmission. decide.
Therefore, when transmitting a plurality of transmission data to a plurality of transmission destinations, it is possible to suppress the overlapping of the buses used as much as possible, and the transmission time of the transmission data to the transmission destination can be shortened.

(10) In the communication system according to an aspect of the present disclosure, when there is no bus having no corresponding transmission destination, the determination unit determines the bus having the smallest corresponding transmission destination as a bus used for transmission by the in-vehicle relay device. To do.

In this aspect, the determination unit determines a bus related to transmission data whose transmission destination is the first communication device, and then determines a bus related to transmission data whose transmission destination is the second communication device. decide. At this time, if there is no bus having no corresponding destination among the two or more buses connected to the second communication device in the correspondence relationship at that time, the determining unit transmits the bus having the smallest corresponding destination. It is determined as a bus to be used for.
Therefore, when transmitting a plurality of transmission data to a plurality of transmission destinations, it is possible to suppress the overlapping of the buses used as much as possible, and to shorten the transmission time of the transmission data to the transmission destination.

(11) In the bus determination method according to one aspect of the present disclosure, a plurality of buses are connected, and a bus used for transmitting the data is transmitted in an in-vehicle relay device that transmits data to a communication device connected to the bus. In the bus determination method for determining, a plurality of data to be transmitted to a plurality of communication devices are received, and a transmission destination of received data is a first communication device connected to one bus, or connected to two or more buses Determining whether the second communication device is to be used, and determining a bus to be used for transmission of each received data based on the result of the determination.

In this aspect, when a plurality of data to be transmitted to a plurality of communication devices is received, it is determined whether the transmission destination of the received data is the first communication device or the second communication device, Based on the result of such determination, the bus used for transmission of each received data is determined.
For example, when it is determined that the transmission destination of received data is the second communication device, a bus that is not used for transmitting other received data is selected from two or more buses connected to the second communication device. The Therefore, when transmitting a plurality of received data to a plurality of transmission destinations, the transmission time to the transmission destination can be shortened.

(12) In a computer program according to an aspect of the present disclosure, a plurality of buses are connected, and a plurality of data to be transmitted to a plurality of communication devices are transmitted to a computer that transmits data to the communication devices connected to the bus. It is determined whether the reception destination of the received data is a first communication device connected to one bus or a second communication device connected to two or more buses, and based on the result of the determination Thus, processing for determining the bus used for transmission of each received data is executed.

In this aspect, for example, a plurality of data to be transmitted to a plurality of communication devices are received under the control of a computer included in the in-vehicle relay device, and the transmission destination of the received data is the first communication device. It is determined whether it is a two-communication device, and the bus used for transmission of each received data is determined based on the result of such determination.
For example, when it is determined that the transmission destination of received data is the second communication device, a bus that is not used for transmitting other received data is selected from two or more buses connected to the second communication device. The Therefore, when transmitting a plurality of received data to a plurality of transmission destinations, the transmission time to the transmission destination can be shortened.

[Details of the embodiment of the present invention]
The present invention will be specifically described with reference to the drawings showing embodiments thereof. An in-vehicle relay device, a communication system, a bus determination method, and a computer program according to an embodiment of the present disclosure will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

(Embodiment 1)
Below, the case where the vehicle-mounted relay apparatus which concerns on embodiment is applied to a vehicle is demonstrated to an example.
FIG. 1 is a block diagram illustrating a main configuration of a vehicle C according to the first embodiment. The vehicle C according to the present embodiment includes one in-vehicle relay device 10, a plurality of ECUs (Electronic Control Units) 20, and a wireless communication device 30. There are nine ECUs 20 (communication devices): ECU1, ECU2,. Hereinafter, ECU1, ECU2,... ECU9 are collectively referred to as ECU20.

For example, three buses 1 (B1), 2 (B2), and 3 (B3) are connected to the in-vehicle relay device 10. ECU1, ECU2,... ECU9 are connected to the in-vehicle relay device 10 via buses B1, B2, B3. ECU1, ECU2,..., ECU9 are divided into three groups and connected to buses B1, B2, B3.

ECU1, ECU2, and ECU3 are connected to the bus B1, ECU4, ECU5, ECU3, and ECU7 are connected to the bus B2, and ECU6, ECU7, ECU8, and ECU9 are connected to the bus B3.
That is, ECU1, ECU2, ECU4, ECU5, ECU6, ECU8, and ECU9 are connected to only one of the buses B1, B2, and B3. On the other hand, ECU3, ECU7 is connected with two buses among buses B1, B2, B3. In the present embodiment, the case where ECU3 and ECU7 are connected to two buses will be described as an example. However, the present invention is not limited to this, and the ECU3 and ECU7 are configured to be connected to three or more buses. May be.

In the following, ECU1, ECU2, ECU4, ECU5, ECU6, ECU8, and ECU9 connected to only one bus are referred to as a single connection ECU (first communication device), and ECU3 is connected to two buses. , ECU7 is referred to as a multiple connection ECU (second communication device).

Each ECU 20 can transmit / receive a message (frame data) to / from the in-vehicle relay device 10 via the bus B1, B2 or B3. The buses B1, B2, and B3 are, for example, twisted pair wires.

In the illustrated example, the case where the vehicle C includes nine ECUs 20 is illustrated, but the present invention is not limited to this, and may be configured to include nine or more or nine or less ECUs.

ECU1, ECU2,..., ECU9 include, for example, an ECU that controls the opening and closing of the door of the vehicle C, an ECU that controls the operation of the engine of the vehicle C, an ECU that controls the operation of the airbag, and an ABS (Antilock Brake System) Various ECUs such as an ECU that controls the operation of the ECU are included. The ECU 20 performs each process by reading and executing a program and data stored in an internal storage unit. The program or data stored in the ECU 20 may be updated for the purpose of, for example, function addition or defect correction.

The wireless communication device 30 acquires an update program or data necessary for the program update process of the ECU 20 from the outside. The wireless communication device 30 transmits the acquired frame data to the in-vehicle relay device 10. Such frame data includes, for example, an update program or data for updating the program of the ECU 20.

The in-vehicle relay device 10 according to the present embodiment includes a control unit 11, a reception unit 13, a transmission unit 12, a buffer 14, a storage unit 15, and the like.
The in-vehicle relay device 10 receives the frame data from the wireless communication device 30 and extracts and stores the above-described program or data. The in-vehicle relay device 10 transmits the update program stored through the buses B1, B2, and B3 to the ECU 20 to be updated. The ECU 20 that has received the update program or the like from the in-vehicle relay device 10 performs a process of updating the program or data stored in the storage unit while executing the operation of the own machine.

More specifically, the storage unit of the ECU 20 has two parts, and the update program and the like are written in the other part while executing the operation of the own machine using one part (used part). At this time, since the use portion (ECU 20) is in operation, the update program or the like is transmitted with a low load that does not affect the operation. After completion of writing, for example, at a timing at which the operation of the own machine can be temporarily stopped, the used part is switched from the one part to the other part.

The control unit 11 includes an arithmetic processing unit such as a CPU (Central Processing Unit) or an MPU (Micro-Processing Unit), and is stored in the storage unit 15 or a ROM (Read Only Memory) (see FIG. 3). Various processes are performed by executing various programs. In the present embodiment, the control unit 11 performs, for example, processing for transmitting an update program or the like to the ECU 20 to be updated, processing for determining a bus used for transmission of the update program, or the like.

The buffer 14 is configured using a memory element such as SRAM (Static Random Access Memory) or DRAM (Dynamic Random Access Memory). The buffer 14 temporarily stores the update program received by the reception unit 13 and the frame data to be transmitted from the transmission unit 12.

The receiving unit 13 and the transmitting unit 12 are connected to the buses B1, B2, and B3, transmit / receive frame data to / from the ECU 20 via the buses B1, B2, and B3, and receive frame data from the wireless communication device 30. . The receiving unit 13 and the transmitting unit 12 may be configured using a so-called CAN controller.

For example, the transmission unit 12 reads transmission data (for example, an update program) stored in the buffer 14 in accordance with an instruction from the control unit 11, and converts the read data into frame data according to a predetermined communication protocol. And it transmits to ECU20 by outputting to bus | bath B1, B2, B3.

The receiving unit 13 receives frame data including the update program acquired by the wireless communication device 30, extracts the update program from the received frame data, stores it in the buffer 14, updates the program, etc. Is notified to the control unit 11.

The storage unit 15 is configured using, for example, an EEPROM (Electrically Erasable Programmable Read Only Memory) or a rewritable nonvolatile memory element such as a flash memory.

The storage unit 15 stores an LUT (Look Up Table). FIG. 2 is a conceptual diagram conceptually showing the LUT stored in the storage unit 15 in the in-vehicle relay device 10 according to the present embodiment.
The LUT is associated with identification data (ID) of each ECU 20 and a bus to which each ECU 20 is connected (hereinafter referred to as a connection bus). Based on the LUT in the storage unit 15, the control unit 11 performs processing for determining a bus used for transmission of an update program or the like (hereinafter referred to as bus determination processing).

Furthermore, in the present embodiment, the storage unit 15 stores a program P for performing bus determination processing. The program P corresponds to, for example, the processing of each step in FIG. 5 described later, and the bus determination processing can be realized by the control unit 11 reading and executing the program P.

The storage unit 15 stores a “decision list” table and an “undecided list” table. FIG. 3 is a conceptual diagram conceptually illustrating an example of a “decision list” table before the bus determination process in the in-vehicle relay device 10 according to the present embodiment.

The “determination list” table includes an update target ECU 20 (hereinafter also referred to as a transmission destination) to which an update program received from the wireless communication device 30 is to be transmitted, and a bus used to transmit such an update program or the like. The bus determined in the bus determination process is associated with the bus.
That is, the “determination list” table associates one bus determined by the bus determination process by the control unit 11 with a transmission destination of an update program or the like (received data) transmitted using the one bus. The corresponding relationship is shown.

On the other hand, in the “undecided list” table, when the bus used for transmission of the update program or the like is not determined in the bus determination process, the transmission destination of the update program or the like is written.

In the in-vehicle relay device 10 according to the present embodiment, when a plurality of update programs to be transmitted to the plurality of ECUs 20 are received from the wireless communication device 30, the transmission destination is a single connection ECU among the plurality of update programs. The bus determination process is preferentially performed for the update program. Therefore, until the bus determination process for the update program whose transmission destination is a single connection ECU is completed, the transmission destination of the update program whose transmission destination is a multiple connection ECU is temporarily written in the table of the “undecided list”. deep.

FIG. 4 is a functional block diagram illustrating a main configuration of the control unit 11 in the in-vehicle relay device 10 according to the present embodiment. The control unit 11 includes a CPU 111, a ROM 112, a RAM 113, a determination unit 114, and a determination unit 115.

The ROM 112 stores in advance basic data, etc., among various control programs and calculation parameters, and the RAM 113 temporarily stores the data and reads it regardless of the storage order, storage position, etc. Is possible. The RAM 113 stores, for example, a program read from the ROM 112, various data generated by executing the program, parameters that change as appropriate during the execution, and the like.

The CPU 111 performs the bus determination process described above by executing a control program stored in advance in the ROM 112.

When the determination unit 114 receives a plurality of update programs to be transmitted from the wireless communication device 30 to the plurality of ECUs 20, whether the transmission destination of each update program is a single connection ECU in the bus determination process, or It is determined whether the ECU is a multiple connection ECU.

The determination unit 115 determines an optimum bus to be used for transmission of each update program based on the determination result of the determination unit 114 with reference to the LUT in the storage unit 15. Details of the determination unit 114 and the determination unit 115 will be described later.

FIG. 5 is a flowchart for explaining bus determination processing by the control unit 11 in the in-vehicle relay device 10 according to the present embodiment. Hereinafter, for convenience of explanation, it is assumed that the wireless communication device 30 receives five frame data including update programs A to E from the outside.

Here, the transmission destination of the update program A is ECU1, the transmission destination of the update program B is ECU2, the transmission destination of the update program C is ECU3, the transmission destination of the update program D is ECU4, and the transmission destination of the update program E Is an ECU 7.
That is, the transmission destination of the update program A, the update program B, and the update program D is a single connection ECU, and the transmission destination of the update program C and the update program E is a multiple connection ECU.

First, for the frame data including the update program A, the CPU 111 obtains transmission destination information from the header information of the frame data (step S101).
Next, the determination unit 114 determines whether or not the transmission destination of the acquired update program A is a multi-connection ECU (step S102). Such a determination is made based on the LUT in the storage unit 15.

Since the transmission destination of the update program A is a single connection ECU (ECU1), the determination unit 114 determines that the transmission destination is not a multiple connection ECU (NO in step S102).

Next, the determination unit 115 determines an optimal bus used for transmission of the update program A with reference to the LUT in the storage unit 15 (step S103). Specifically, since the ECU 1 is connected only to the bus B1 from the LUT of the storage unit 15, the determination unit 115 determines the bus B1 as the optimum bus used for transmission of the update program A.

The CPU 111 stores the determination result made by the determination unit 115 in the “determination list” table (step S104). Specifically, the CPU 111 writes “ECU1” in the transmission destination column corresponding to the bus 1 (B1) of the “determined bus” in the “determination list” table of FIG.

Thereafter, the CPU 111 determines whether or not the writing process (hereinafter referred to as writing process) to the “decision list” table or the “undecided list” table has been completed for all received frame data (steps). S106).
Currently, the writing process has been performed only on the frame data including the update program A. Therefore, the CPU 111 determines that the writing process has not been completed (step S106: NO), and returns the process to step S101. . Next, processing is performed on the frame data including the update program B. Such a process is the same as the process for the frame data including the update program A, and a description thereof will be omitted.

On the other hand, with respect to the frame data including the update program C, the CPU 111 acquires information on the transmission destination from the header information of the frame data (step S101). Further, the determination unit 114 determines whether or not the transmission destination of the acquired update program A is a multi-connection ECU (step S102).

Since the transmission destination of the update program C is the multiple connection ECU (ECU 3), the determination unit 114 determines that the transmission destination is the multiple connection ECU (step S102: YES).
At this time, in order to preferentially perform the bus determination processing for the update program whose transmission destination is a single connection ECU, the CPU 111 sets the transmission destination (ECU 3) of the update program C in the “undecided list” table. Writing is performed temporarily (step S105).

Next, the CPU 111 determines whether or not the writing process has been completed for all received frame data (step S106).
Up to this point, since the writing process has been performed only on the three frame data including the update programs A, B, and C, the CPU 111 determines that the writing process has not been completed (step S106: NO). ), The process returns to step S101 again.

Next, processing is performed on the frame data including the update programs D and E, respectively. Detailed description of these processes is omitted.

When the processing of the above steps S101 to S105 is repeated for the five frame data including the update programs A to E, respectively, and the writing processing for these five frame data is completed, the storage unit 15 The “determination list” table stores correspondences with a single connection ECU.
That is, as shown in FIG. 6, “ECU1, ECU2” is written in the destination column corresponding to bus 1 (B1) of “determined bus”, and the destination column corresponding to bus 2 (B2). "ECU4" is written.
Further, “ECU3, ECU7” is written in the “undetermined list” table (not shown).

As described above, when it is determined that the writing process has been completed for all the received frame data (step S106: YES), the CPU 111 checks the “undetermined list” table to write the transmission destination. It is determined whether or not there is (step S107).

If the CPU 111 determines that there is no writing in the “undetermined list” table (step S107: NO), the process ends.
On the other hand, when the CPU 111 determines that there is a write in the “undetermined list” table (step S107: YES), the determining unit 115 selects the first ECU written in the “undetermined list” table (step S108). ).
As described above, since “ECU3, ECU7” is currently written in the “undecided list” table, the determination unit 115 selects “ECU3” as the first ECU and performs the bus determination process.

The determination unit 115 determines whether there is a bus having no corresponding transmission destination among the connection buses of the ECU selected in step S108 in the correspondence relationship of FIG. 6 (step S109).
The ECU 3 is currently selected, and the connection buses of the ECU 3 are the bus B1 and the bus B2. On the other hand, in the correspondence (see FIG. 6), two ECUs are associated with the bus 1 (B1), and one ECU is associated with the bus 2 (B2). Therefore, the determination unit 115 determines that there is no bus having no corresponding transmission destination among the connection buses of the ECU selected in step S108 (step S109: NO).

At this time, the determination unit 115 determines the bus with the smallest number of corresponding transmission destinations as the bus used for transmission (step S113).
Specifically, the connection buses of the ECU 3 are the bus B1 and the bus B2, and in the correspondence relationship, two ECUs are associated with the bus 1 (B1), and one ECU is associated with the bus 2 (B2). (See FIG. 6). Therefore, the determination part 115 determines bus B2 among the connection buses of ECU3 as a bus used for transmission.

Next, the CPU 111 writes and stores the determination result in step S113 in the “determination list” table of the storage unit 15 (step S111). That is, the CPU 111 writes “ECU3” in the transmission destination column corresponding to the bus 2 (B2) of the “determined bus” as in the “determination list” table shown in FIG.
Further, the CPU 111 deletes the ECU 3 from the table in the “undecided list” column of the storage unit 15 (step S112).

Thereafter, the CPU 111 determines whether or not the bus determination process for the transmission destination written in the “undetermined list” table is completed (step S114). Such a determination is made by checking the table of the “undecided list”. Currently, the ECU 3 is deleted, but the ECU 7 is still written. Therefore, the CPU 111 determines that the bus determination process for the transmission destination written in the “undetermined list” table is not completed (step S114: NO), and returns the process to step S108.

Returning to step S108, the determination unit 115 selects the first ECU written in the “undecided list” table (step S108).
As described above, since only the ECU 7 is currently written in the “undetermined list” table, the determination unit 115 selects “ECU 7” as the first ECU and performs the bus determination process.

The determination unit 115 determines whether there is a bus having no corresponding transmission destination among the connection buses of the ECU selected in step S108 in the correspondence relationship of FIG. 7 (step S109).
The ECU 7 is currently selected, and the connection buses of the ECU 7 are the bus B2 and the bus B3.
On the other hand, in the correspondence (see FIG. 7), two ECUs are associated with the bus 2 (B2), and no ECU is associated with the bus 3 (B3). Accordingly, the determination unit 115 determines that there is a bus having no corresponding transmission destination among the connection buses of the ECU selected in step S108 (step S109: YES).

At this time, the determination unit 115 determines a bus having no corresponding transmission destination as a bus used for transmission (step S110).
As described above, the connection buses of the ECU 7 are the bus B2 and the bus B3, two ECUs are associated with the bus 2 (B2), and no ECU is associated with the bus 3 (B3) ( (See FIG. 7). Therefore, the determination part 115 determines bus B3 among the connection buses of ECU7 as a bus used for transmission.

Next, the CPU 111 writes and stores the determination result in step S110 in the “determination list” table of the storage unit 15 (step S111). That is, the CPU 111 writes “ECU7” in the transmission destination column corresponding to the bus 3 (B3) of the “determined bus” in the “determination list” table of FIG.
Further, the CPU 111 deletes the ECU 7 from the “undecided list” table in the storage unit 15 (step S112).

Thereafter, the CPU 111 determines whether or not the bus determination process for the transmission destination written in the “undetermined list” table is completed (step S114). The ECU 3 and the ECU 7 are all deleted from the “undetermined list” table. Accordingly, the CPU 111 determines that the bus determination process for the transmission destination written in the “undetermined list” table is completed (step S114: YES), and ends the process.

Thereafter, the transmission unit 12 transmits the update programs A to E to the target ECU 20 via the bus determined in the bus determination process as described above.

Since it has the above configuration, the in-vehicle relay device 10 according to the present embodiment, when receiving a plurality of update programs, etc., duplicates the bus used for transmission of each update program to the transmission destination. As much as possible, the program update in the target ECU can be performed within the shortest time.

Further, as described above, in the in-vehicle relay device 10 according to the present embodiment, when a plurality of update programs are received, among the plurality of update programs, an update program whose transmission destination is a single connection ECU is used. On the other hand, the bus determination process is preferentially performed. That is, the bus used for transmission to the single connection ECU in which the bus cannot be selected is determined with priority, and then the bus used for transmission to the multiple connection ECU does not overlap with the already determined bus as much as possible. To be determined selectively. Accordingly, it is possible to more effectively suppress duplication of buses used for transmission of update programs and the like.

Note that the determination unit 114 and the determination unit 115 described above may be configured by hardware logic, or may be constructed in software by the CPU 111 executing a predetermined program.

(Embodiment 2)
In the first embodiment, although the in-vehicle relay device 10 of the vehicle C determines the bus used when the update program or the like is transmitted to the target ECU 20, the server device 40 (information processing device) is used in the second embodiment. Determine the bus.

FIG. 8 is a block diagram illustrating a main configuration of the in-vehicle communication system 100 according to the second embodiment. The in-vehicle communication system 100 according to the present embodiment includes a vehicle C and a server device 40.

The vehicle C according to the present embodiment includes one in-vehicle relay device 10, a plurality of ECUs 20, and a wireless communication device 30. There are nine ECUs 20, ECU1, ECU2,. Hereinafter, ECU1, ECU2,... ECU9 are collectively referred to as ECU20.

The server device 40 transmits frame data including an update program or data necessary for a program update process of the ECU 20 to the wireless communication device 30 of the vehicle C. The wireless communication device 30 transmits the received frame data to the in-vehicle relay device 10, and the in-vehicle relay device 10 transmits this to the ECU 20 to be updated.
The main configuration of the vehicle C according to the present embodiment is the same as that of the vehicle C according to the first embodiment, and detailed description thereof is omitted.

The server device 40 according to the present embodiment includes a control unit 41, a transmission unit 42, a storage unit 43, and the like.

The control unit 41 includes an arithmetic processing unit such as a CPU or an MPU, for example, and performs various processes by executing various programs stored in the storage unit 43 or the ROM (see FIG. 9). The storage unit 43 stores an update program for updating the program of each ECU 20 of the vehicle C, and the control unit 41, for example, a process of transmitting the update program of each ECU 20 to the vehicle C, and Processing (bus determination processing) for determining a bus used in advance when transmitting such an update program or the like to the target ECU 20 in the vehicle C is performed.

In addition, when a specific bus is determined by the bus determination process with respect to a predetermined update program, the control unit 41 stores bus information (bus data) representing the determined specific bus in the predetermined update program. Attached.

The storage unit 43 is configured using a non-volatile rewritable memory element such as an EEPROM or a flash memory.

Further, the storage unit 43 stores an LUT. The LUT is associated with identification data (ID) of each ECU 20 of the vehicle C and a connection bus to which each ECU 20 is connected (see FIG. 2). Based on the LUT in the storage unit 43, the control unit 41 performs a bus determination process for determining a bus used for transmission of an update program or the like in the vehicle C.

Furthermore, in this embodiment, the storage unit 43 stores a program P for performing bus determination processing. The program P corresponds to, for example, the processing of each step in FIG. 5 described above, and the bus determination processing can be realized by the control unit 41 reading and executing the program P.

The storage unit 43 stores a “decision list” table and an “undecided list” table as in the first embodiment. The “decision list” table and the “undetermined list” table have already been described, and a detailed description thereof will be omitted.

The transmission unit 42 transmits frame data (transmission data) including the bus information and the update program to the vehicle C according to a predetermined communication protocol.

FIG. 9 is a functional block diagram illustrating a main configuration of the control unit 41 of the server device 40 in the in-vehicle communication system 100 according to the present embodiment. The control unit 41 includes a CPU 411, a ROM 412, a RAM 413, a determination unit 414, a determination unit 415, and an addition unit 416.

The ROM 412 stores in advance basic data, etc., among various control programs and calculation parameters. The RAM 413 temporarily stores the data and reads it regardless of the storage order, storage position, etc. Is possible. The RAM 413 stores, for example, a program read from the ROM 412, various data generated by executing the program, parameters that change as appropriate during the execution, and the like.

The CPU 411 performs the bus determination process described above by loading a control program stored in advance in the ROM 412 onto the RAM 413 and executing it.

When the determination unit 414 transmits a plurality of update programs and the like related to the plurality of ECUs 20 to the vehicle C, in the bus determination process, the transmission destination of each update program is a single connection ECU or a plurality of connection ECUs. Determine if there is any.

The determining unit 415 determines an optimum bus to be used for transmission of each update program in the vehicle C with reference to the LUT in the storage unit 43 based on the determination result of the determining unit 414.

The adding unit 416 uses bus information (bus data) representing the bus determined by the determining unit 415 with respect to a predetermined updating program to be transmitted to the vehicle C (hereinafter referred to as a determined bus) for the predetermined updating. It is added as header information to the frame data including the program.

FIG. 10 is a flowchart illustrating a process in which the control unit 41 of the server device 40 transmits the update program in the in-vehicle communication system 100 according to the present embodiment.

Before transmitting a plurality of update programs and the like related to the plurality of ECUs 20 to the vehicle C, the control unit 41 executes a bus determination process in advance (step S201). Such bus determination processing is the same as the processing shown in FIG. 5 of the first embodiment, and detailed description thereof is omitted.
However, in the bus determination process in step S201, the CPU 411, the ROM 412, the RAM 413, the determination unit 414, and the determination unit 415 are the CPU 111, the ROM 112, the RAM 113, the determination unit 114, and the determination unit 115, respectively. Works in the same way.

When all the determination buses related to the plurality of update programs to be transmitted to the vehicle C are determined by the bus determination process in step S201, the adding unit 416 represents a corresponding determination bus for each update program. The bus information is attached (step S202).

Next, the transmission unit 42 transmits frame data including each update program and corresponding bus information to the vehicle C (step S203).

Thus, the plurality of frame data transmitted from the server device 40 is received by the wireless communication device 30 of the vehicle C. The wireless communication device 30 transmits the received plurality of frame data to the in-vehicle relay device 10, and the in-vehicle relay device 10 extracts an update program from each frame data. The in-vehicle relay device 10 transmits the extracted update program to the ECU 20 to be updated based on the bus information (decision bus) included in the frame data.

With the configuration as described above, the in-vehicle communication system 100 according to the present embodiment is used to transmit each update program to the transmission destination when a plurality of update programs and the like are transmitted to the ECU 20 of the vehicle C. Duplication of the buses to be performed can be suppressed as much as possible, and the program update in the target ECU can be performed within the shortest time.

Further, in the in-vehicle communication system 100 according to the present embodiment, the server device 40 performs the bus determination process described above, so that the processing load on the vehicle C is reduced and the transmission of the update program and the program update are quickly performed on the vehicle C. Done.

Note that the determination unit 414, the determination unit 415, and the addition unit 416 described above may be configured by hardware logic, or may be configured by software by the CPU 411 executing a predetermined program.

About the same part as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. *

It should be considered that the embodiment disclosed this time is illustrative in all respects and not restrictive. The scope of the present invention is defined not by the above-described meaning but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

DESCRIPTION OF SYMBOLS 10 In-vehicle relay apparatus 11 Control part 13 Reception part 15 Memory | storage part 20 ECU
111 CPU
114 determination unit
115 decision part B1, B2, B3 bus

Claims (12)

1. In an in-vehicle relay device that is connected to a plurality of buses and transmits data to a communication device connected to the bus,
   A receiving unit for receiving a plurality of data to be transmitted to a plurality of communication devices;
   A determination unit that determines whether a transmission destination of received data is a first communication device connected to one bus or a second communication device connected to two or more buses;
   A vehicle-mounted relay device comprising: a determination unit that determines a bus used for transmission of each reception data based on a determination result of the determination unit.
2. A storage unit that stores each communication device in association with a bus connected to each communication device,
   The in-vehicle relay device according to claim 1, wherein the determination unit performs the determination based on the storage content of the storage unit.
3. The determination unit preferentially determines a bus used for transmission of reception data whose transmission destination is the first communication device,
   The in-vehicle relay device according to claim 2, wherein the storage unit stores a correspondence relationship in which one bus determined by the determination unit is associated with a transmission destination of reception data transmitted using the one bus. .
4. The in-vehicle unit according to claim 3, wherein when the transmission destination of the reception data is the second communication device, the determination unit determines a bus having no corresponding transmission destination as a bus used for transmission based on the correspondence relationship. Relay device.
5. The in-vehicle relay device according to claim 4, wherein when there is no bus having no corresponding transmission destination, the determination unit determines a bus having the smallest corresponding transmission destination as a bus used for transmission.
6. In a communication system including an information processing device and a vehicle-mounted relay device that is connected to a plurality of buses and transmits data to the communication device connected to the bus,
   The information processing apparatus includes:
   For a plurality of transmission data to be transmitted to a plurality of communication devices, the transmission destination is the first communication device connected to one bus of the in-vehicle relay device, or connected to two or more buses of the in-vehicle relay device A determination unit that determines whether or not the second communication device is,
   A determination unit that determines a bus used for transmission of each transmission data by the in-vehicle relay device based on a determination result of the determination unit;
   An addition unit for attaching bus data representing the bus determined by the determination unit to each transmission data;
   A transmission unit that transmits the plurality of transmission data to which the bus data is attached to the in-vehicle relay device;
   The in-vehicle relay device is
   A receiving unit that receives the plurality of transmission data from the information processing apparatus;
   A communication system for transmitting the transmission data to the communication device based on bus data attached to the transmission data.
7. The information processing apparatus includes:
   A storage unit that associates and stores each communication device and the bus of the in-vehicle relay device to which each communication device is connected,
   The communication system according to claim 6, wherein the determination unit performs the determination based on the storage content of the storage unit.
8. The determination unit preferentially determines a bus used for transmission by the in-vehicle relay device for transmission data whose transmission destination is the first communication device,
   The storage unit stores a correspondence relationship in which one bus determined by the determination unit is associated with a transmission destination of transmission data transmitted by the in-vehicle relay device using the one bus. The communication system described.
9. When the transmission destination of the transmission data is the second communication device, the determination unit determines a bus having no corresponding transmission destination as a bus used for transmission by the in-vehicle relay device based on the correspondence relationship. 9. The communication system according to 8.
10. 10. The communication system according to claim 9, wherein, when there is no bus having no corresponding transmission destination, the determination unit determines a bus having the smallest corresponding transmission destination as a bus used for transmission by the in-vehicle relay device.
11. In a bus determination method in which a plurality of buses are connected, and in the in-vehicle relay device that transmits data to a communication device connected to the bus, the bus used for transmitting the data is determined.
    Receiving a plurality of data to be transmitted to a plurality of communication devices;
    Determining whether the destination of the received data is a first communication device connected to one bus or a second communication device connected to two or more buses;
    A bus determination method including determining a bus to be used for transmission of each received data based on a result of the determination.
12. A plurality of buses are connected to a computer that transmits data to a communication device connected to the buses.
    Receiving a plurality of data to be transmitted to a plurality of communication devices;
    Determining whether the destination of the received data is a first communication device connected to one bus or a second communication device connected to two or more buses;
    A computer program for executing processing for determining a bus to be used for transmission of each received data based on a result of the determination.

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