JP6631676B2 - In-vehicle update device, update system and update processing program - Google Patents

Description

  The present invention relates to an in-vehicle update device, an update system, and an update processing program for performing an update process of an in-vehicle communication device by transmitting an update program or data to the in-vehicle communication device.

  2. Description of the Related Art Conventionally, a vehicle is equipped with a plurality of in-vehicle communication devices such as a plurality of ECUs (Electronic Control Units), and the plurality of ECUs are connected via a communication line such as a CAN (Controller Area Network) bus to mutually transmit and receive information. It is possible. Each ECU reads out and executes a program stored in a storage unit such as a flash memory or an electrically erasable programmable read only memory (EEPROM) by a processing device such as a CPU (Central Processing Unit), thereby controlling various types of vehicle control and the like. Is being processed. The program or data stored in the storage unit of the ECU needs to be updated with a new program or data when it is necessary to add a function, correct a defect, or upgrade the version. In this case, an update program or data is transmitted via a communication line to an ECU to be updated.

  In Patent Document 1, a rewriting device and a plurality of rewriting target ECUs have a configuration in which they are connected by the same network bus, and the rewriting device uses a predetermined specific ID for all rewriting target ECUs. A program rewriting method has been proposed in which data is transmitted at the same time, the rewriting target ECU generates individual IDs using the individual identification data, and transmits data to the rewriting device using the generated IDs.

JP 2014-194688 A

  2. Description of the Related Art In recent years, it has been attempted to improve reliability of a vehicle by connecting the ECU to a plurality of communication lines with respect to an ECU having an important function in a vehicle. For example, the ECU connected to the two communication lines can perform communication via the other communication line even if one of the communication lines becomes incapable of communication for some reason. Therefore, it is possible to prevent the function of the ECU from being unavailable.

  Up to now, there has been no study on how to update a program or data for an ECU connected to such a plurality of communication lines.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an in-vehicle updating apparatus capable of efficiently performing an updating process of an in-vehicle communication apparatus connected to a plurality of communication lines. A system and an update processing program are provided.

An in-vehicle update device according to the present invention is an in-vehicle update device that performs communication with an in-vehicle communication device via at least two communication lines and performs a process of updating a program or data stored in a storage unit of the in-vehicle communication device. A storage unit for storing a plurality of update division data obtained by dividing the update program or data to be transmitted to the on-vehicle communication device; and a plurality of update division data stored in the storage unit, A transmission processing unit that performs a process of distributing and transmitting to the in-vehicle communication device via one communication line , wherein the transmission processing unit transmits the plurality of communication lines to the at least two communication lines according to a communication load of each communication line. It is characterized in that the divided data for update is distributed .

  Further, the in-vehicle update device according to the present invention includes a communication unit that communicates with a storage device storing the update division data, and the update division data received from the storage device via the communication unit. And a storage processing unit that performs a process of storing in the storage unit.

Further, the update system according to the present invention performs communication between the in-vehicle communication device via at least two communication lines and the in-vehicle communication device having the first storage unit for storing a program or data, An in-vehicle update device that performs a process of updating a program or data stored in the first storage unit, wherein the in-vehicle update device transmits an update program or data to be transmitted to the in-vehicle communication device. A storage unit for storing the divided plurality of update division data, and a process of distributing and transmitting the update division data stored in the storage unit to the on-vehicle communication device via the at least two communication lines It has a transmission processing unit, the transmission processing unit, in response to the communication load of each communication line, for distributing the at least two divided data of the plurality of update to the communication line And wherein the door.

  Further, the update system according to the present invention further includes a storage device storing the update division data, wherein the in-vehicle update device communicates with a storage device storing the update division data, A storage processing unit that performs a process of storing the update division data received from the storage device via the communication unit in the storage unit.

  Further, in the update system according to the present invention, the storage device attaches order information to the update divided data and transmits the data to the in-vehicle update device, and the storage processing unit of the in-vehicle update device stores the The attached divided data for update is stored in the storage unit.

  Also, the update system according to the present invention, the in-vehicle communication device, the second storage unit that temporarily stores the update divided data received from the in-vehicle update device via the at least two communication lines, On the basis of the order information added to the update division data stored in the second storage unit, the update division data stored in the first storage unit is stored using the update division data stored in the second storage unit. Update processing unit for performing a process of updating the program or data.

Further, the update processing program according to the present invention communicates with the in-vehicle communication device via at least two communication lines, and performs an in-vehicle update that performs a process of updating a program or data stored in a storage unit of the in-vehicle communication device. A storage processing unit that performs a process of storing, in a storage unit, a plurality of update division data obtained by dividing an update program or data to be transmitted to the in-vehicle communication device; and a plurality of update programs stored in the storage unit. The divided data is operated as a transmission processing unit that performs a process of distributing and transmitting the divided data to the in-vehicle communication device via the at least two communication lines, and the transmission processing unit operates according to a communication load of each communication line. The plurality of update division data are distributed to one communication line .

  In the present invention, the in-vehicle update device connected to the at least two communication lines transmits an updating program or data to the in-vehicle communication device connected to at least two communication lines, whereby the in-vehicle communication device is connected to the at least two communication lines. Perform update processing. The in-vehicle update device stores an update program or data obtained by dividing the update program or data into a plurality of update data in the storage unit. The in-vehicle update device determines a communication state for each communication line, appropriately distributes the plurality of update division data to the plurality of communication lines according to the determined communication state, and transfers the plurality of update division data to the plurality of communication lines. To the in-vehicle communication device via the. As a result, the in-vehicle update device can efficiently utilize the plurality of communication lines to transmit the plurality of update division data to the in-vehicle communication device efficiently and at high speed.

  In the present invention, the in-vehicle update device determines the communication load of each communication line for a plurality of communication lines to which the in-vehicle communication device to be updated is connected. The in-vehicle update device can distribute the update division data according to the determined communication load, for example, preferentially distribute the update division data to a low-load communication line. This allows the in-vehicle updating device to efficiently use the plurality of communication lines.

  Further, in the present invention, a storage device different from the in-vehicle update device stores the update division data. When performing the update process, the update division data is transmitted from the storage device to the vehicle-mounted update device, and the update division data is provided from the vehicle-mounted update device to the vehicle-mounted communication device. Thus, the in-vehicle update device does not need to store the update division data, and only needs to temporarily store the update division data provided from the storage device. The in-vehicle update device and the storage device may perform either wired or wireless communication, and in the case of wired communication, the storage device may be configured to be detachable from the in-vehicle update device via a communication cable or the like.

  Further, in the present invention, the storage device attaches order information for restoring the update program or data obtained by dividing the update program or data, and transmits the data to the vehicle-mounted update device. When receiving the update division data from the storage device, the in-vehicle update device stores the update division data in the storage unit together with the order information. The in-vehicle update device transmits the update division data to which the order information is added to the in-vehicle communication device. With this, the in-vehicle communication device that has received the update division data via the plurality of communication lines can transmit the original program from the plurality of update division data even if the order of the update division data and the reception order are different. Alternatively, data can be restored.

  Further, in the present invention, the in-vehicle communication device temporarily stores the update divided data received from the in-vehicle update device via a plurality of communication lines, separately from the first storage unit storing the program or data used for its own processing. A second storage unit for performing the operation. The in-vehicle communication device performs a process of updating a program or data stored in the first storage unit using the update division data stored in the second storage unit based on the order information attached to the update division data. Do. Thereby, the update process of the program or data can be reliably performed using the update division data received out of order through the plurality of communication lines.

  According to the present invention, the in-vehicle update device appropriately distributes the plurality of update division data to the plurality of communication lines according to the communication state of each communication line, and transmits the update division data to the in-vehicle communication device to be updated. With this configuration, the transmission of the update divided data can be performed efficiently and at high speed by effectively utilizing the plurality of communication lines, so that the in-vehicle communication device connected to the plurality of communication lines can be efficiently updated. be able to.

FIG. 1 is a schematic diagram illustrating a configuration example of an update system according to the present embodiment. FIG. 2 is a block diagram illustrating a configuration of an ECU. FIG. 3 is a block diagram illustrating a configuration of a gateway. FIG. 3 is a block diagram illustrating a configuration of a repro tool. FIG. 7 is a schematic diagram for explaining transmission of repro data by a repro tool. It is a flowchart which shows the procedure of the repro data transmission process which a repro tool performs. It is a flowchart which shows the procedure of the repro data reception process which a gateway performs. It is a flowchart which shows the procedure of the repro data transmission process which a gateway performs. It is a flowchart which shows the procedure of the repro data reception process which ECU performs. 5 is a flowchart illustrating a procedure of an application program update process performed by an ECU. It is a schematic diagram which shows the example of a structure of the update system concerning a modification.

<System configuration>
FIG. 1 is a schematic diagram illustrating a configuration example of an update system according to the present embodiment. The update system according to the present embodiment includes a communication system in which a plurality of ECUs 3a to 3d and 10 mounted on vehicle 1 can communicate with each other via communication lines 2a to 2c and gateway 30. The configuration is such that the gateway 30 updates the programs or data stored in the ECUs 3a to 3d and 10. In the illustrated example, the vehicle 1 is provided with four ECUs 3a to 3d and one ECU 10. The ECU 3a is connected to the communication line 2a, the ECU 3b is connected to the communication line 2b, and the ECUs 3c and 3d are connected to the communication line 2c. Each of the ECUs 3a to 3d can transmit and receive information to and from one communication line 2a to 2c to which the ECU 3a to 3d is connected. On the other hand, the ECU 10 is connected to the two communication lines 2a and 2b, and can transmit and receive information to and from both the communication lines 2a and 2b. For example, the ECU 10 can use the communication line 2a when performing communication with the ECU 3a, and can use the communication line 2b when performing communication with the ECU 3b.

  The communication lines 2a to 2c to which the ECUs 3a to 3d and 10 are connected are connected to the gateway 30, respectively. The gateway 30 is a device that relays communication between the communication lines 2a to 2c. The gateway 30 relays information by transmitting information received on any of the three communication lines 2a to 2c from the other communication lines 2a to 2c. Thus, for example, the ECU 3a can communicate with the ECU 3b via the communication line 2a, the gateway 30, and the communication line 2b.

  The gateway 30 is connected via a communication line 6 to an OBD (On-Board Diagnostics) connector 5 arranged at an appropriate position of the vehicle 1. The OBD connector 5 is a connector for an external device to obtain various information by the self-diagnosis function of the vehicle 1. In the present embodiment, for example, a reprogramming tool (hereinafter referred to as a repro tool) 50 provided at a dealer or a maintenance shop of the vehicle 1 is connected to the OBD connector 5 of the vehicle 1 via a dedicated communication cable. By doing so, communication between the gateway 30 and the repro tool 50 can be performed. The repro tool 50 gives a program or data for updating the ECUs 3a to 3d and 10 to the gateway 30, and the gateway 30 transmits the given program or data for updating to the target ECUs 3a to 3d and 10 and receives it. The update is performed by the ECUs 3a to 3d and 10 that have been performed.

  FIG. 2 is a block diagram illustrating a configuration of the ECU 10. The ECU 10 according to the present embodiment includes a processing unit 11, two communication units 12a and 12b, a flash memory 13, a RAM (Random Access Memory) 14, and the like. The processing unit 11 is configured using an arithmetic processing device such as a CPU. The processing unit 11 reads out and executes an application program (described as an application in the figure) 13b stored in the flash memory 13 to perform control processing of the vehicle 1 and various arithmetic processing. Further, the processing unit 11 reads out and executes a boot loader program (denoted as a boot loader in the figure) 13a stored in the flash memory 13, thereby performing initial setting processing of the ECU 10, update processing of the application program 13b, and the like. . By executing the boot loader program 13a, the processing unit 11 implements an update processing unit 11a that performs an update process of the application program 13b as a software functional block.

  The ECU 10 according to the present embodiment has two communication units 12a and 12b, and can communicate with the other ECUs 3a to 3d via the two communication lines 2a and 2b. The communication unit 12a is connected to the communication line 2a and performs communication via the communication line 2a. The communication unit 12b is connected to the communication line 2b and performs communication via the communication line 2b. The communication units 12a and 12b perform information transmission by converting the transmission information given from the processing unit 11 into electric signals and outputting the electric signals to the communication lines 2a and 2b, and sample the signals of the communication lines 2a and 2b. By receiving the information, the information is received, and the received information is provided to the processing unit 11. When performing information transmission, the processing unit 11 may appropriately determine which of the communication units 12a and 12b performs transmission.

  In the present embodiment, the ECUs 3a to 3d and 10 and the gateway 30 perform communication according to, for example, a CAN communication protocol via the communication lines 2a to 2c. In this case, the communication lines 2a to 2c are so-called CAN buses, and the communication units 12a and 12b can be configured using a CAN controller.

  The flash memory 13 is a data rewritable nonvolatile memory element, and stores programs such as a boot loader program 13a and an application program 13b. Although not shown, data necessary for executing these programs is stored in the flash memory 13. The processing unit 11 can perform various processes by reading and executing these programs from the flash memory 13. Further, the processing unit 11 can erase and write data in the flash memory 13.

  The RAM 14 is configured using a memory element such as an SRAM (Static Random Access Memory) or a DRAM (Dynamic Random Access Memory). The processing unit 11 can read and write data from and to the RAM 14. For example, the RAM 14 temporarily stores information generated in the course of the arithmetic processing performed by the processing unit 11. Further, for example, the RAM 14 temporarily stores information received by the communication units 12a and 12b.

  FIG. 3 is a block diagram showing a configuration of the gateway 30. The gateway 30 according to the present embodiment includes a processing unit 31, communication units 32a to 32c, a flash memory 33, a RAM 34, an OBD communication unit 35, and the like. The processing unit 31 is configured using an arithmetic processing device such as a CPU. The processing unit 31 reads out and executes the application program 33b stored in the flash memory 33, thereby processing for relaying communication between the communication lines 2a to 2c and processing for updating the application program 13b of the ECUs 3a to 3d and 10. I do. The processing unit 31 includes a relay processing unit 31a that executes processing related to communication relay and an update processing unit 31b that performs processing related to updating of the ECUs 3a to 3d and 10 by executing the application program 33b. It is realized as. Further, the processing unit 31 reads out and executes the boot loader program 33a stored in the flash memory 33, thereby performing an initial setting process of the gateway 30, a process of updating its own application program 33b, and the like.

  The gateway 30 has three communication units 32a to 32c, and the communication units 32a to 32c are configured using, for example, a CAN controller. The communication unit 32a is connected to the communication line 2a and performs communication via the communication line 2a. The communication unit 32b is connected to the communication line 2b and performs communication via the communication line 2b. The communication unit 32c is connected to the communication line 2c and performs communication via the communication line 2c. The communication units 32a to 32c perform information transmission by converting the transmission information given from the processing unit 31 into electric signals and outputting the electric signals to the communication lines 2a to 2c, and sample the signals of the communication lines 2a to 2c. Then, the information is received, and the received information is given to the processing unit 31. When information is received in any of the communication units 32a to 32c, the relay processing unit 31a of the processing unit 31 relays the communication by transmitting the information from the other communication units 32a to 32c.

  The flash memory 33 is a data rewritable nonvolatile memory element, and stores programs such as a boot loader program 33a and an application program 33b. Although not shown, data necessary for executing these programs is stored in the flash memory 33. The processing unit 31 can perform various processes by reading and executing these programs from the flash memory 33. Further, the processing unit 31 can erase and write data in the flash memory 33.

  The RAM 34 is configured using a memory element such as an SRAM or a DRAM. The processing unit 31 can read and write data from and to the RAM 34. For example, the RAM 34 temporarily stores information generated in the course of the arithmetic processing performed by the processing unit 31. Further, for example, the RAM 34 temporarily stores information received by the communication units 32a to 32c. Further, for example, the RAM 34 temporarily stores information received from the repro tool 50 via the OBD connector 5.

  The OBD communication unit 35 is connected to the OBD connector 5 via the communication line 6. The OBD communication unit 35 performs communication with the repro tool 50 connected to the OBD connector 5. Communication between the OBD communication unit 35 of the gateway 30 and the repro tool 50 via the OBD connector 5 may follow a CAN communication protocol or may follow another communication protocol. The OBD communication unit 35 performs information transmission by converting the transmission information provided from the processing unit 31 into an electric signal and outputting the electric signal to the communication line 6, and samples and acquires the signal of the communication line 6. , And gives the received information to the processing unit 31.

  FIG. 4 is a block diagram showing the configuration of the repro tool 50. The repro tool 50 according to the present embodiment is a portable device provided in, for example, a dealer or a maintenance shop of the vehicle 1, and updates the application programs 13b and 33b of the ECUs 3a to 3d and 10 of the vehicle 1 (reproduced). Programming). At the time of maintenance or inspection of the vehicle 1, the operator downloads update data from a server device or the like to the repro tool 50 and stores it, and connects the repro tool 50 to the OBD connector 5 of the vehicle 1 via a dedicated communication cable. Connect to After performing a predetermined process such as an authentication process between the repro tool 50 and the gateway 30, the repro tool 50 transmits the downloaded update data to the gateway 30, and executes the application programs 13b and 10b of the ECUs 3a to 3d and 10. 33b is started to be updated.

  The repro tool 50 includes a processing unit 51, a storage unit 52, an OBD communication unit 53, and the like. The processing unit 51 is configured using an arithmetic processing device such as a CPU. The processing unit 51 performs various processes related to updating the ECUs 3a to 3d and 10 by reading and executing a program stored in the storage unit 52 or a ROM (Read Only Memory) not shown. In the processing unit 51, an update processing unit 51a that performs an update process of the ECUs 3a to 3d and 10 is realized as a software functional block by executing a program.

  The storage unit 52 may be configured using a nonvolatile memory element such as a flash memory or an EEPROM, may be configured using a volatile memory element such as an SRAM or a DRAM, and may be configured using a magnetic memory such as a hard disk. It may be configured using a storage device. The storage unit 52 stores reprogramming data (hereinafter referred to as repro data) 52a used for updating the ECUs 3a to 3d and 10. The update process according to the present embodiment is, for example, a process of replacing (overwriting) a part or all of the application program 13b stored in the flash memory 13 of the ECU 10 with a new application program. The repro data 52a downloaded and stored in the storage unit 52 of the repro tool 50 is the new application program itself to be replaced.

  The OBD communication unit 53 has a communication cable connected to the OBD connector 5 of the vehicle 1. This communication cable may be configured to be detachable from the OBD communication unit 53 or may be configured to be fixed to the OBD communication unit 53. The OBD communication unit 53 communicates with the gateway 30 of the vehicle 1 while being connected to the OBD connector 5 of the vehicle 1 via a communication cable. The OBD communication unit 53 performs information transmission by converting the transmission information provided from the processing unit 51 into an electric signal and outputting the electric signal to a communication cable, and also obtains a signal on the communication cable by sampling the signal. Information is received, and the received information is provided to the processing unit 51.

<Update processing>
When the update process of the ECU 10 of the vehicle 1 is performed, for example, an operator such as a dealer or a maintenance shop performs an operation of storing desired repro data 52 a in the storage unit 52 of the repro tool 50. The repro data 52a may be downloaded to the repro tool 50 from a server device or the like by wireless or wired communication, for example, or acquired by the repro tool 50 via a recording medium such as a memory card or an optical disk. It may be something. After storing the repro data 52a in the storage unit 52, the operator connects the communication cable of the repro tool 50 to the OBD connector 5 of the vehicle 1. As a result, the authentication process is performed between the repro tool 50 and the gateway 30 of the vehicle 1, and when the authentication process is successful, the communication between the repro tool 50 and the gateway 30 becomes possible, and the update process can be performed. It becomes.

  For example, when the worker performs an operation of starting the update process on the repro tool 50, the update process by the repro tool 50 is started. The update processing unit 51a of the repro tool 50 transmits a request for performing an update process from the OBD communication unit 53 to the gateway 30 of the vehicle 1. When the OBD communication unit 53 receives a response to the request from the gateway 30 indicating that the update process is permitted, the update processing unit 51a of the repro tool 50 starts the update process. The update processing unit 51a reads out the repro data 52a stored in the storage unit 52, and transmits the repro data 52a from the OBD communication unit 53 to the gateway 30.

  FIG. 5 is a schematic diagram for explaining transmission of the repro data 52a by the repro tool 50. As described above, in the updating process, the application program 13b stored in the flash memory 13 of the ECU 10 is replaced with a new application program. Therefore, the repro tool 50 needs to transmit the replaced application program to the gateway 30. The repro data 52a stored in the storage unit 52 of the repro tool 50 is a data group obtained by dividing the application program to be replaced into data of a predetermined length (for example, about several bytes to several tens of bytes). In FIG. 5, the application program is divided into N pieces and is shown as repro data 1 to N. In the present embodiment, a configuration in which the application program is divided in advance is stored in the storage unit 52 of the repro tool 50. However, the present invention is not limited to this. May go.

  The update processing unit 51 a of the repro tool 50 sequentially reads the divided repro data (hereinafter, referred to as “divided data”) from the storage unit 52 and supplies the repro data to the OBD communication unit 53, thereby sequentially transmitting the divided data to the gateway 30. At this time, the update processing unit 51a adds order information to the divided data. The assigned order information is stored in, for example, a header or a footer, and transmitted from the repro tool 50 to the gateway 30 together with the divided data. Prior to the transmission of the divided data, the repro tool 50 may notify the gateway 30 of how many update application programs are divided and transmitted, that is, the value of N in FIG.

  FIG. 6 is a flowchart illustrating a procedure of the transmission process of the repro data 52a performed by the repro tool 50. The update processing unit 51a of the repro tool 50 transmits a request for performing an update process from the OBD communication unit 53 to the gateway 30 (Step S1). The update processing unit 51a determines whether or not the response given from the gateway 30 to this request permits the update process (step S2). If the response is that the update process is not permitted (S2: NO), the update processing unit 51a ends the update process.

  When permission to perform the update process is given from the gateway 30 (S2: YES), the update processing unit 51a reads one of the divided data from the storage unit 52 (Step S3). The update processing unit 51a adds order information to the read divided data (step S4). The update processing unit 51a transmits the divided data to the gateway 30 by providing the divided data together with the order information to the OBD communication unit 53 (Step S5). The update processing unit 51a determines whether transmission of all the divided data of the repro data 52a stored in the storage unit 52 has been completed (Step S6). If the transmission of all the divided data has not been completed (S6: NO), the update processing unit 51a returns the process to step S3, and transmits the next divided data. When the transmission of all the divided data ends (S6: YES), the update processing unit 51a ends the update processing.

  The gateway 30 that has received the update processing request from the repro tool 50 via the OBD connector 5 determines whether to permit the update processing based on, for example, the state of the ignition switch of the vehicle 1 or the detection results of various sensors. And transmits the result of the determination to the repro tool 50 as a response. For example, the gateway 30 may be configured not to permit the update process when it is determined that the vehicle 1 is traveling, and to allow the update process when it is determined that the vehicle 1 is not traveling.

  When a response permitting the update process is transmitted from the gateway 30 to the repro tool 50, the repro tool 50 starts transmitting the divided data of the repro data 52a as described above. The update processing unit 31b of the gateway 30 receives the divided data transmitted from the repro tool 50 by the OBD communication unit 35, and stores the received divided data in the RAM.

  When the update processing target is the ECU 10 connected to the plurality of communication lines 2a and 2b, the update processing unit 31b of the gateway 30 performs the processing of each communication line 2a in parallel with the process of receiving the divided data from the repro tool 50. , 2b are determined. In the present embodiment, the update processing unit 31b calculates the load ratio of each of the communication lines 2a and 2b as the communication state, and determines the utilization ratio of the communication lines 2a and 2b to be used for the update process according to the calculated load ratio. . The update processing unit 31b checks the time during which the communication lines 2a and 2b have been used (messages have been transmitted / received) within the predetermined time, and calculates the ratio of the usage time to the predetermined time as a load factor.

  For example, it is assumed that the calculation result of the update processing unit 31b indicates that the load factor of the communication line 2a is 20% and the load factor of the communication line 2b is 40%. It is also assumed that the upper limit of the load factor of each communication line 2a, 2b is set to 50%. In this case, the update processing unit 31b determines that the margin of the communication line 2a is 50% -20% = 30% and the margin of the communication line 2b is 50% -40% = 10%. From these results, the update processing unit 31b distributes and transmits the plurality of divided data items stored in the RAM 14 at a ratio of communication line 2a: communication line 2b = 3: 1. That is, when four divided data are stored in the RAM 14, the update processing unit 31b transmits three of the four divided data from the communication line 2a and transmits one of the divided data from the communication line 2b.

  When the load factor of the communication line 2a is X%, the load factor of the communication line 2b is Y%, and the upper limit of the load factor of each of the communication lines 2a and 2b is set to Q%, the update processing unit 31b , Communication line 2a: communication line 2b = (QX) :( QY). Further, for example, the ECU to be updated is connected to the three communication lines 2a to 2c, the load factor of the communication line 2a is X%, the load factor of the communication line 2b is Y%, and the load of the communication line 2c. When the rate is Z% and the upper limit of the load rate of each of the communication lines 2a to 2c is set to Q%, the update processing unit 31b sets the communication line 2a: the communication line 2b: the communication line 2c = (Q-X ): The divided data may be distributed at a ratio of (QY) :( QZ). The same applies to the case where the ECU to be updated is connected to four or more communication lines, and a description thereof will be omitted.

  FIG. 7 is a flowchart illustrating a procedure of the reception processing of the repro data 52a performed by the gateway 30. The update processing unit 31b of the gateway 30 determines whether the OBD communication unit 35 has received a request for performing an update process from the repro tool 50 (step S11). When the update processing request has not been received (S11: NO), the update processing unit 31b waits until the request is received. When the update processing request is received (S11: YES), the update processing unit 31b transmits a response to the effect that the update processing is permitted from the OBD communication unit 35 to the repro tool 50 (step S12). Note that, in this flowchart, the processing procedure when the update processing is not permitted is omitted.

  Thereafter, the update processing unit 31b determines whether or not the OBD communication unit 35 has received the divided data of the repro data 52a from the repro tool 50 (Step S13). If the divided data has not been received (S13: NO), the update processing unit 31b waits until the divided data is received. If the divided data is received (S13: YES), the update processing unit 31b stores the received divided data in the RAM 34 (along with the order information added to the divided data) (step S14). The update processing unit 31b determines whether or not all the divided data of the repro data 52a have been received (step S15). If all the divided data have not been received (S15: NO), the update processing unit 31b returns the process to step S13 and continues to receive the divided data. When all the divided data have been received (S15: YES), the update processing unit 31b ends the reception processing.

  FIG. 8 is a flowchart showing the procedure of the transmission process of the repro data 52a performed by the gateway 30. The process is performed in parallel with the above-described reception process after a permission response to the update process request from the repro tool 50 is performed. is there. The update processing unit 31b of the gateway 30 checks the time during which communication has been performed within a predetermined time for the plurality of communication lines 2a and 2b to which the ECU 10 to be updated is connected, and thereby determines the load factor of each of the communication lines 2a and 2b. Is calculated (step S21). The update processing unit 31b reads a predetermined upper limit of the load factor (Step S22). The update processing unit 31b calculates the margin of each of the communication lines 2a and 2b based on the load factor calculated in step S21 and the upper limit read in step S22 (step S23). The update processing unit 31b determines the distribution ratio of the divided data to the plurality of communication lines 2a, 2b based on the calculated margin of each of the communication lines 2a, 2b (step S24).

  The update processing unit 31b determines whether or not the divided data is stored in the RAM 34 (Step S25). When the divided data is not stored (S25: NO), the update processing unit 31b waits until the divided data is received from the repro tool 50 and stored in the RAM. When the divided data is stored (S25: YES), the update processing unit 31b reads one divided data from the RAM 34 (Step S26). At this time, it is preferable that the update processing unit 31b examines the order information added to the divided data and reads out the divided data having the earliest order. The update processing unit 31b determines one of the communication lines 2a, 2b to be the transmission destination of the current divided data among the plurality of communication lines 2a, 2b based on the distribution ratio determined in step S24 (step S27). ). The update processing unit 31b transmits the divided data read in step S26 through the communication lines 2a and 2b determined in step S27 (step S28).

  The update processing unit 31b determines whether or not all the divided data of the repro data 52a to be transmitted to the ECU 10 has been transmitted (step S29). If not all the divided data has been transmitted (S29: NO), the update processing unit 31b returns the process to step S25 and continues to transmit the divided data. When all the divided data have been transmitted (S29: YES), the update processing unit 31b ends the transmission processing.

  The divided data of the repro data 52a transmitted by the gateway 30 via the plurality of communication lines 2a and 2b is received by the ECU 10 connected to the communication lines 2a and 2b. The ECU 10 that has received the divided data stores the received divided data in the RAM 14. Even if the gateway 30 transmits the divided data in the order shown in the order information, the ECU 10 that receives the divided data via the plurality of communication lines 2a and 2b does not necessarily split the data in the order shown in the order information. Data is not necessarily received.

  The update processing unit 11a of the ECU 10 restores the repro data 52a after receiving all the divided data, and performs a process of replacing the application program 13b stored in the flash memory 13 with the application program given as the repro data 52a. Thus, the updating process can be performed. However, the update processing unit 11a may partially replace the application program 13b using the received divided data even before the reception of all the divided data, thereby speeding up the update processing. It is possible to do.

  FIG. 9 is a flowchart illustrating a procedure of a process of receiving the repro data 52a performed by the ECU 10. The update processing unit 11a of the ECU 10 determines whether one of the communication units 12a and 12b has received the divided data of the repro data 52a from the gateway 30 (Step S41). When neither of the communication units 12a and 12b has received the divided data (S41: NO), the update processing unit 11a waits until receiving the divided data. When the divided data is received (S41: YES), the update processing unit 11a stores the received data in the RAM 14 (Step S42). The update processing unit 11a determines whether or not all the divided data of the repro data 52a have been received (Step S43). When all the divided data have not been received (S43: NO), the update processing unit 11a returns the process to step S41 and continues to receive the divided data. When all the divided data have been received (S43: YES), the update processing unit 11a ends the reception processing.

  FIG. 10 is a flowchart illustrating a procedure of an update process of the application program 13b performed by the ECU 10. In this processing, a variable n for storing the order information of the divided data to be written is used. This variable can be realized by using, for example, a register in the processing unit 11. The update processing unit 11a of the ECU 10 first initializes the value of the variable n to 1 (Step S51). Next, the update processing unit 11a determines whether or not the divided data to which the n-th order information is added is stored in the RAM 14 (Step S52). If the n-th divided data is not stored (S52: NO), the update processing unit 11a waits until the n-th divided data is stored in the RAM 14.

  When the n-th divided data is stored in the RAM 14 (S52: YES), the update processing unit 11a replaces a part of the application program 13b stored in the flash memory 13 with the n-th divided data stored in the RAM 14. (Step S53). At this time, the update processing unit 11a can perform the replacement by erasing the relevant portion of the application program 13b from the flash memory 13 and writing the n-th divided data in the erased location. However, the update processing unit 11a may first erase the entire application program 13b and write the n-th divided data in a free area of the flash memory 13.

  After the completion of writing the divided data into the flash memory 13, the update processing unit 11a adds 1 to the value of the variable n (Step S54). The update processing unit 11a determines whether the value of the variable n exceeds the number N of divided data (Step S55). If the value of the variable n does not exceed the number N of the divided data (S55: NO), the update processing unit 11a returns the process to step S52 and continues to write the divided data. When the value of the variable n exceeds the number N of divided data (S55: YES), the update processing unit 11a ends the update processing.

<Summary>
In the updating system according to the present embodiment having the above-described configuration, the gateway 30 connected to the two communication lines 2a and 2b transmits renewal data to the ECU 10 connected to the two communication lines 2a and 2b. By transmitting 52a, the update process of the ECU 10 is performed. The gateway 30 stores the divided data obtained by dividing the repro data 52a into a plurality of pieces in the RAM. The gateway 30 determines a communication state for each of the communication lines 2a and 2b, appropriately distributes a plurality of divided data to the plurality of communication lines 2a and 2b in accordance with the determined communication state, and divides the plurality of divided data into a plurality of communication lines. The signal is transmitted to the ECU 10 via the lines 2a and 2b. Thereby, the gateway 30 can efficiently utilize the plurality of communication lines 2a and 2b to transmit the plurality of divided data to the ECU 10 efficiently and at high speed.

  The gateway 30 calculates a load factor for each of the communication lines 2a and 2b to which the ECU 10 to be updated is connected. The gateway 30 can distribute the divided data according to the determined load factor, for example, preferentially distributing the divided data to the low-load communication lines 2a and 2b. Thereby, the gateway 30 can efficiently use the plurality of communication lines 2a and 2b.

  In the update system according to the present embodiment, a repro tool 50 different from the gateway 30 stores the divided data of the repro data 52a in the storage unit 52. When performing the update process, the divided data of the repro data 52 a is transmitted from the repro tool 50 to the gateway 30, and the divided data is provided from the gateway 30 to the ECU 10. This eliminates the need for the gateway 30 to store the repro data 52a, and may temporarily store the divided data of the repro data 52a given from the repro tool 50 in the RAM 34.

  In addition, the repro tool 50 transmits the divided data obtained by dividing the repro data 52a to the gateway 30 with order information for restoring them. When receiving the divided data from the repro tool 50, the gateway 30 stores the divided data in the RAM 34 together with the order information. The gateway 30 transmits the divided data to which the order information is added to the ECU 10. Thus, the ECU 10 that has received the divided data of the repro data 52a via the plurality of communication lines 2a and 2b can regenerate the original repro data from the plurality of divided data even when the order of the divided data and the receiving order are different. 52a can be restored.

  In addition to the flash memory 13 storing the application program 13b used for its own processing, the ECU 10 temporarily stores the divided data of the repro data 52a received from the gateway 30 via the plurality of communication lines 2a, 2b. Having. The ECU 10 performs a process of updating the application program 13b stored in the flash memory 13 using the divided data stored in the RAM 14 based on the order information attached to the divided data. Thus, the ECU 10 can reliably perform the update process of the application program 13b using the divided data received in any order via the plurality of communication lines 2a and 2b.

  In the present embodiment, the gateway 30 transmits the divided data of the repro data 52a to the ECU 10 to be updated. However, the present invention is not limited to this. For example, the other ECUs 3a to 3d may be configured to transmit the divided data of the repro data 52a to the ECU 10, and further the other device such as a car navigation device mounted on the vehicle 1 transmits the divided data to the ECU 10. It may be. Although the device to be updated is the ECU 10, the present invention is not limited to this, and various devices other than the ECU 10 mounted on the vehicle 1 may be subjected to the update process. The device for transmitting the divided data of the repro data 52a to the gateway 30 is the repro tool 50, but is not limited to this. For example, a general-purpose portable device such as a notebook computer, a smartphone, or a tablet terminal is used. Alternatively, the device may be a non-portable stationary device installed at a dealer or a maintenance shop of the vehicle 1 or the like.

  Further, in the present embodiment, the application program 13b stored in the flash memory 13 of the ECU 10 is configured to be updated, but the present invention is not limited to this. For example, data stored in the flash memory 13 of the ECU 10, for example, data such as set values relating to the operation of the ECU 10 may be updated, or both the application program 13b and data may be updated. In addition, although the communication is performed between the gateway 30 and the ECU 10 via the two communication lines 2a and 2b, the communication is not limited to this, and the communication may be performed via three or more communication lines. .

  The update processing unit 31b of the gateway 30 calculates the load factor of each of the communication lines 2a and 2b, and distributes the divided data to the plurality of communication lines 2a and 2b based on the load factor. Not something. The update processing unit 31b checks, for example, the priority assigned to the message transmitted to each of the communication lines 2a and 2b, and determines the distribution ratio of the divided data to the communication lines 2a and 2b to which many messages with high priority are transmitted. For example, the divided data may be distributed based on a communication state other than the load factor, such as lowering the load factor.

  Further, in the present embodiment, the configuration is such that the update process is performed by the communication system mounted on the vehicle 1. However, the configuration is not limited to this, and the configuration may be such that the update process is performed by a communication system other than the vehicle. Good.

  The gateway 30 and the repro tool 50 communicate with each other by connecting a communication cable to the OBD connector 5 of the vehicle 1. However, the configuration is not limited to this. The connection between the repro tool 50 and the vehicle 1 may be based on a standard other than OBD. Furthermore, as shown in the following modified examples, the configuration may be such that the gateway 30 and the repro tool 50 are wirelessly connected instead of being connected by wire.

(Modification)
FIG. 11 is a schematic diagram illustrating a configuration example of an update system according to a modification. In the updating system according to the modification, the gateway 30 is connected to the wireless communication device 105 via the communication line 6. The wireless communication device 105 can perform wireless communication with the repro tool 150 via a wireless network such as a mobile phone communication network or a wireless LAN (Local Area Network). The repro tool 150 according to the modification has substantially the same configuration as the repro tool 50 shown in FIG. 4, but includes a wireless communication unit instead of the OBD communication unit 53, and the gateway 30 of the vehicle 1 via a wireless network. Wireless communication can be performed with the device. Thereby, in the update system according to the modification, the repro tool 50 transmits the divided data of the repro data 52a to the wireless communication device 105 of the vehicle 1 by wireless communication, and transmits the divided data received by the wireless communication device 105 to the gateway 30. be able to.

  In the updating system according to the modified example, the gateway 30 is configured to perform wireless communication with the repro tool 150 using the wireless communication device 105, but the partner of wireless communication is not limited to the repro tool 150. For example, the gateway 30 may obtain the repro data 52a by directly communicating with a server device that distributes the repro data 52a without passing through the repro tool 150.

DESCRIPTION OF SYMBOLS 1 Vehicle 2a-2c Communication line 3a-3d ECU
5 OBD connector 6 Communication line 10 ECU (in-vehicle communication device)
Reference Signs List 11 processing unit 11a update processing unit 12a, 12b communication unit 13 flash memory (storage unit, first storage unit)
13a Boot loader program 13b Application program 14 RAM (second storage unit)
30 Gateway (in-vehicle update device)
31 processing unit 31a relay processing unit 31b update processing unit (communication state determination unit, transmission processing unit, storage processing unit)
32a to 32c Communication unit 33 Flash memory 33a Boot loader program 33b Application program 34 RAM (storage unit)
35 OBD communication unit (communication unit)
50 Repro Tools (storage device)
Reference Signs List 51 processing unit 51a update processing unit 52 storage unit 52a repro data 53 OBD communication unit 105 wireless communication device 150 repro tool

Claims (7)

An in-vehicle update device that performs communication with the in-vehicle communication device via at least two communication lines and performs a process of updating a program or data stored in a storage unit of the in-vehicle communication device,
A storage unit that stores a plurality of update division data obtained by dividing the update program or data to be transmitted to the in-vehicle communication device,
A transmission processing unit that performs a process of distributing and transmitting the plurality of update division data stored in the storage unit to the in-vehicle communication device via the at least two communication lines ,
The in-vehicle update device , wherein the transmission processing unit distributes the plurality of update division data to the at least two communication lines according to a communication load of each communication line . A communication unit that communicates with a storage device that stores the update division data;
The in-vehicle update device according to claim 1, further comprising: a storage processing unit that performs a process of storing the update division data received from the storage device via the communication unit in the storage unit. A program stored in the first storage unit of the in-vehicle communication device that performs communication with the in-vehicle communication device via at least two communication lines and the in-vehicle communication device having a first storage unit that stores a program or data. Or an in-vehicle update device that performs a process of updating data,
The in-vehicle update device,
A storage unit that stores a plurality of update division data obtained by dividing the update program or data to be transmitted to the in-vehicle communication device,
A plurality of updating the divided data stored in the storage unit, to have the said at least two transmission processing unit via the communication line performs a process of distributing sent to the vehicle communication device,
The update system , wherein the transmission processing unit distributes the plurality of update division data to the at least two communication lines according to a communication load of each communication line . Further comprising a storage device storing the update divided data,
The in-vehicle update device,
A communication unit that communicates with a storage device that stores the update division data;
The update system according to claim 3 , further comprising: a storage processing unit configured to store the update division data received from the storage device via the communication unit in the storage unit. The storage device transmits the update division data to the in-vehicle update device by attaching order information to the update divided data,
The update system according to claim 4 , wherein the storage processing unit of the in-vehicle update device stores the update division data to which the order information is added in the storage unit. The in-vehicle communication device,
A second storage unit that temporarily stores the update division data received from the in-vehicle update device via the at least two communication lines;
Based on the order information attached to the update division data stored in the second storage unit, store the update division data in the first storage unit using the update division data stored in the second storage unit. The update system according to claim 5 , further comprising: an update processing unit that performs a process of updating the program or data obtained. An in-vehicle update device that performs communication with the in-vehicle communication device via at least two communication lines and performs a process of updating a program or data stored in a storage unit of the in-vehicle communication device,
A storage processing unit that performs a process of storing a plurality of update divided data obtained by dividing the update program or data to be transmitted to the in-vehicle communication device in a storage unit,
Operating as a transmission processing unit that performs a process of distributing and transmitting the plurality of update division data stored in the storage unit to the in-vehicle communication device via the at least two communication lines ;
An update processing program , wherein the transmission processing unit distributes the plurality of update division data to the at least two communication lines according to a communication load of each communication line .

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