WO2010140193A1

WO2010140193A1 - Data relay device and data relay method used in the device

Info

Publication number: WO2010140193A1
Application number: PCT/JP2009/002533
Authority: WO
Inventors: 平林幸治
Original assignee: トヨタ自動車株式会社
Priority date: 2009-06-04
Filing date: 2009-06-04
Publication date: 2010-12-09
Also published as: JP4877663B2; JPWO2010140193A1

Abstract

Provided is a relay device which can reduce the data amount in a communication bus of a relay destination even when relaying data containing a plurality of types of parameters. The relay device extracts information described in a predetermined region in the relay data among information contained in the predetermined relay data for relay from a first communication line to a second communication line. The extracted relay data is transmitted to the second communication line for relay only when a change is found in the information extracted from the information described in the same region of the same type of relay data which has been relayed previously.

Description

Data relay apparatus and data relay method used in the apparatus

The present invention relates to a data relay device, and more particularly, to a data relay device that relays data transmitted and received by a moving body such as a vehicle.

In recent years, the number of ECUs (Electric Control Units) mounted is increasing as the in-vehicle systems mounted on mobile bodies such as automobiles are diversified. And in-vehicle systems mounted on automobiles, the mounted ECUs need to communicate with each other in order to realize their functions. For this reason, in an automobile that has been developed in recent years, a plurality of in-vehicle networks are configured, and each network is connected by a data relay device. As an example of such a data relay device, there is a communication gateway device described in Patent Document 1 (hereinafter referred to as conventional technology).

In the prior art, when the information indicated by the received data is information that does not require gateway processing based on the content of the data received by the gateway device that connects two different communication lines, or when the information changes It is determined whether the information is to be gateway-processed only, or is the information to be gateway-processed regardless of the change of the information. In the prior art, the above-described determination is made based on a command code included in data received by the gateway device.

For example, in the prior art, the engine speed display command included in the data periodically transmitted by the engine ECU is a command that does not require gateway processing, and the data is not subjected to gateway processing. On the other hand, in the related art, the outside air temperature display command included in the data periodically transmitted by the air conditioner ECU is a command indicating that gateway processing is performed only when information indicated by the data changes, Data is gatewayed only when information indicated by the data changes. In the prior art, the cruising range display command and the instantaneous fuel consumption display command included in the data transmitted by the meter ECU are commands indicating that gateway processing is performed regardless of changes in information indicated by the data. The data is gatewayed regardless of changes in the information indicated by the data. As a result, the prior art prevents an unnecessary increase in the amount of data in the data relay destination communication line.

Japanese Patent No. 4111647

However, the conventional technology has the following problems. In other words, the data subjected to gateway processing in the above-described prior art includes only one type of parameter, for example, only the engine speed or only the outside air temperature. However, one piece of data transmitted and received in a network configured in the automobile may include a plurality of types of parameters such as engine speed and vehicle speed. And in the said prior art, when multiple types of parameters are contained in one data, the necessity of gateway processing cannot be judged for every parameter. For this reason, when a plurality of types of parameters are included in one piece of data, the above conventional technique cannot reduce the amount of data in the relay destination communication bus.

Therefore, an object of the present invention is to provide a data relay device that can reduce the amount of data in a communication bus at a relay destination even when data including a plurality of types of parameters is relayed.

The present invention has the following features to solve the above problems.
According to a first aspect of the present invention, the relay data specifying means for specifying a predetermined type of relay data from the data received from the first communication line, and the relay data specified by the relay data specifying means are extracted in advance. Judgment is made by the change data judgment means and the change data judgment means for judging whether or not the determined partial data is change data changed from the partial data extracted from the same type of relay data received last time. First changing means for transmitting the changed data to the second communication line and relaying the changed data.

The second invention is an invention subordinate to the first invention, further comprising storage means for storing predetermined filter data in association with each type of relay data, wherein the change data judging means is a relay data Extracting means for extracting partial data from the relay data using filter data associated with the type of relay data specified by the data specifying means, and determining whether the partial data extracted by the extracting means is change data And a partial change judging means.

A third invention is an invention dependent on the second invention, wherein the storage means has a radix in an area corresponding to an area from which partial data in the relay data is extracted, and extracts the partial data in the relay data. Filter data predetermined as data having zero in an area corresponding to a non-existing area is stored in association with each type of relay data, and the extracting means includes the relay data specified by the relay data specifying means, the relay data The result obtained by calculating the logical product with the filter data associated with the type of data is extracted from the relay data as partial data.

A fourth invention is an invention subordinate to the first invention, wherein the time measuring means for starting time measurement from a predetermined time start timing and the relay data specified by the relay data specifying means are time Relay timing determining means for determining whether or not the relay data is a predetermined type of direct relay data to be transmitted and relayed to the second communication line when is within a predetermined length, and relay timing determining means And a second transmission means for transmitting and relaying the relay data determined as direct relay data to the second communication line by the relay timing determination means and determining that the change data determination means is not direct relay data. It is determined whether the partial data extracted from the relay data is change data.

The fifth invention is an invention subordinate to the fourth invention, and is mounted on the vehicle, and the time measuring means starts measuring time with the time when the ignition switch of the vehicle is turned on as the time measurement start timing.

The sixth invention is an invention subordinate to the fourth invention, and is mounted on the vehicle, and the time measuring means starts measuring time with the time when the ignition switch of the vehicle is turned off as the time measurement start timing.

The seventh invention is an invention subordinate to the second invention, wherein the change data judging means is a relay data including the change data judged by the partial change judging means, wherein the change data is specified in advance. Specific change data judging means for judging whether or not it is a type of specific change relay data for judging whether or not a change has occurred, and the relay data determined to be specific change relay data by the specific change data judging means. And a specific change determination unit that determines whether or not the change data that has been output has undergone a specific change, wherein the first transmission means determines the relay data that is determined not to be the specific change relay data by the specific change data determination means. The included change data and the change data determined to have undergone the specific change by the specific change determination means are transmitted to the second communication line and relayed.

The eighth invention is an invention according to the sixth invention, wherein the specific change determination unit extracts change data extracted from relay data determined to be specific change relay data by the change determination data determination means. Made a specific change when it was determined from the change data extracted from the same type of relay data received last time that the change was either above or below a predetermined threshold. Judge.

A ninth invention is an invention subordinate to the first invention, wherein the first communication node is mounted on a vehicle and communicates with the first communication line throughout a period in which an ignition switch of the vehicle is on. Is connected, and the second communication line connected to the second communication line is fed from the power storage means of the vehicle, and transmits relay data including partial data determined to be change data by the partial change determination means The vehicle state determination means for determining whether the ignition switch is on when the destination is the first communication node, and the transmission destination of the relay data including the partial data determined to be the change data by the partial change determination means The communication node state determining means for determining whether or not the second communication node is in a normal operation state when the second communication node is the second communication node and the vehicle state determining means When it is determined that the switch is not on, the second communication node is normally connected to the discarding unit for discarding the relay data including the partial data determined to be changed data by the partial change determining unit and the communication node state determining unit. When it is determined that the second communication node is not in the operation state, the second transmission means for transmitting a signal indicating an instruction to return the second communication node to the normal operation state to the second communication line; When the change data is transmitted to the second communication line connected to the second communication node that is determined not to be in the normal operation state by the node state determination means, the change data is transmitted after the signal is transmitted by the second transmission means. Send.

According to a tenth aspect of the present invention, a relay data specifying step for specifying a predetermined type of relay data from data received from the first communication line, and a relay data specified in the relay data specifying step are extracted in advance. Judgment in a change data judgment step and a change data judgment step for judging whether or not the determined partial data is change data that has changed from the partial data extracted from the same type of relay data received last time A transmission step of transmitting and relaying the changed data to the second communication line.

According to the present invention, it is possible to provide a data relay device that can reduce the amount of data in a relay destination communication bus even when data including a plurality of types of parameters is relayed.

1 is a block diagram illustrating a schematic configuration of a network according to a first embodiment. 1 is a functional block diagram showing a schematic configuration of a data relay device according to a first embodiment. Functional block diagram showing a functional configuration of a processing unit according to the first embodiment The figure which shows an example of the relay information in 1st Embodiment The figure which shows an example of the filter data in 1st Embodiment The figure which shows an example of the newest relay data in 1st Embodiment The flowchart which shows the process of the process part which concerns on 1st Embodiment. The functional block diagram which shows the function structure of the process part which concerns on the 1st modification of 1st Embodiment. The figure which shows an example of the direct relay information in the 1st modification of 1st Embodiment. The flowchart which shows the process of the process part which concerns on the 1st modification of 1st Embodiment. The functional block diagram which shows the function structure of the process part which concerns on the 2nd modification of 1st Embodiment. The figure which shows an example of the specific change data information which concerns on the 2nd modification of 1st Embodiment. The figure which shows an example of the information amount shown by specific change data information, and the position of information The flowchart which shows the process of the process part which concerns on the 2nd modification of 1st Embodiment. FIG. 3 is a block diagram showing a schematic configuration of a network according to the second embodiment. The figure which shows schematic structure of the data relay apparatus which concerns on 2nd Embodiment. The functional block diagram which shows the function structure of the process part which concerns on 2nd Embodiment. The figure which shows an example of the relay information in 2nd Embodiment The figure which shows an example of the filter data in 2nd Embodiment The figure which shows an example of the newest relay data in a 2nd display form The flowchart which shows the process of the process part which concerns on 2nd Embodiment.

(First embodiment)
FIG. 1 is a block diagram showing a schematic configuration of a network 1 that relays data by the data relay device 20 according to the first embodiment of the present invention. The first communication nodes 10a to 10b and the data relay device 20 are each connected to the first communication line A. The second communication nodes 30a to 30b and the data relay device 20 are each connected to the second communication line B. The data relay device 20 is connected to each of the first communication line A and the second communication line B, and as an example, relays data from the first communication line A to the second communication line B. . In the description of the present embodiment, a case where the communication protocol used in the network 1 is CAN (Controller Area Network) will be described as an example. In the following description, as an example, all data is expressed in hexadecimal numbers. However, data that can be processed in the present invention is expressed in other expression methods such as digital data expressed in binary numbers. May be data.

Each of the first communication nodes 10a to 10b is connected to the first communication line A and transmits / receives one or more types of data. Further, the first communication nodes 10a to 10b transmit different types of data, respectively. Here, the data type is a type divided by an identifier (CAN-ID in this embodiment) included in the data. In each of the first communication nodes 10a to 10b according to the present embodiment, one or more different CAN-IDs are predetermined as identifiers. Each of the first communication nodes 10a to 10b according to the present embodiment transmits / receives CAN-ID and data including at least information corresponding to the CAN-ID at an arbitrary timing. Each of the first communication nodes 10a to 10b transmits / receives a frame of a format defined by a communication protocol used in the network 1 (CAN protocol in this embodiment) as data.

The data relay device 20 has a predetermined type so as to relay to any of the second communication nodes connected to the second communication line B in the data transmitted by the first communication nodes 10a to 10b. Is transmitted to the second communication line B and relayed. A more detailed description of the data relay device 20 according to the present embodiment will be described later.

Each of the second communication nodes 30a to 30b is connected to the second communication line B. Like each of the first communication nodes 10a to 10b described above, a frame of a format defined by the CAN protocol is used. Send and receive as data. Each of the second communication nodes 30a to 30b also receives data addressed to the own node among the data relayed by the data relay device 20.

The schematic configuration of the network 1 shown in FIG. 1 shows an example in which two first communication nodes of the first communication nodes 10a to 10b are connected to the first communication line A. The first communication node connected to the first communication line A may be less than 2 or 3 or more. In addition, in the schematic configuration of the network 1 illustrated in FIG. 1, a case where two second communication nodes of the second communication nodes 30a to 30b are connected to the second communication line B is illustrated as an example. The second communication node connected to the second communication line B may be less than 2 or 3 or more.

The above is the description of the schematic configuration of the network 1 according to the present embodiment. Next, the data relay device 20 according to the present embodiment will be described in more detail.

FIG. 2 is a block diagram showing a schematic configuration of the data relay device 20 according to the present embodiment. The data relay apparatus 20 according to the present embodiment includes a receiving unit 201, a processing unit 202, a transmitting unit 203, and a storage unit 204.

The receiving unit 201 is typically realized by an interface circuit including a communication circuit that receives data from a connected communication line and a storage element (for example, a register), and is connected to the first communication line A. When data is transmitted from each of the first communication nodes (first communication nodes 10a to 10b in this embodiment) to the first communication line A, the transmitted data is received. When the data is received, the receiving unit 201 causes the processing unit 202 to acquire the received data.

The processing unit 202 is typically realized by electronic components mainly composed of integrated circuits such as an LSI (Large Scale Integration), a microcomputer, and a CPU (Central Processing Unit), and the data acquired from the receiving unit 201 Among these, the transmission unit 203 is caused to transmit data in which information included in the data has changed. A more detailed description of the processing unit 202 according to the present embodiment will be described later.

The transmission unit 203 is typically realized by an interface circuit including a communication circuit that transmits data to a connected communication line, a storage element (for example, a register), and the like. When acquired, the acquired change data is transmitted to the second communication line B and relayed.

The storage unit 204 is typically realized by a RAM (Random Access Memory), and stores filter data, relay information, and various types of information stored from the processing unit 202, which will be described later.

The above is the description of the schematic configuration of the data relay device 20 according to the present embodiment. Next, the processing unit 202 according to the present embodiment will be described in more detail.

FIG. 3 is a functional block diagram showing a more detailed functional configuration of the processing unit 202 according to the present embodiment. The processing unit 202 according to the present embodiment includes a relay data specifying unit 2021 and a change data determining unit 2022.

The relay data specifying unit 2021 receives the second communication node connected to the second communication line B from the data received by the receiving unit 201 from the first communication line A (in this embodiment, the second communication node A predetermined type of relay data is specified to be relayed to the communication nodes 30a to 30b). A specific example of the relay data specifying unit 2021 will be described. When the relay data specifying unit 2021 acquires data from the receiving unit 201, first, the relay data specifying unit 2021 acquires the data by referring to the relay information stored in advance in the storage unit 204. It is determined whether the received data is relay data to be relayed to the second communication line B.

Here, the relay information stored in the storage unit 204 will be described. FIG. 4 is a diagram illustrating an example of relay information stored in advance in the storage unit 204 according to the present embodiment. The relay information shown as an example in FIG. 4 includes an identifier (this embodiment) included in data of a predetermined type to be transmitted and relayed to the second communication line B among the data acquired from the receiving unit 201. In the form, the same identifier as CAN-ID) is shown. When the relay data specifying unit 2021 according to the present embodiment acquires data from the receiving unit 201, the relay data specifying unit 2021 refers to the relay information stored in the storage unit 204 and the same identifier as the identifier included in the acquired data is relay information. It is determined whether or not it is indicated.

The relay data specifying unit 2021 specifies relay data that has been determined in advance to transmit and relay the acquired data to the second communication line B when the identifier included in the acquired data is indicated in the relay information. Then, the change data determination unit 2022 is made to acquire. On the other hand, the relay data specifying unit 2021 discards the acquired data when the identifier included in the acquired data is not indicated in the relay information.

The change data determination unit 2022 extracts partial data that is previously determined to be extracted from the relay data specified by the relay data specification unit 2021 from the same type of relay data that the reception unit 201 has previously received. Judge whether or not it has changed.

A specific example of the change data determination unit 2022 according to this embodiment will be described in more detail. As illustrated in FIG. 3, the change data determination unit 2022 according to the present embodiment includes an extraction unit 20221 and a partial change determination unit 20222. The relay data specified by the relay data specifying unit 2021 is acquired by the extracting unit 20221 included in the change data determining unit 2022.

When the relay data is acquired, the extraction unit 20221 uses the filter data associated with the acquired relay data type from among the filter data stored in advance in the storage unit 204 to extract partial data from the relay data. Extract. A specific example of the extraction unit 20221 will be described. FIG. 5A is a diagram illustrating an example of filter data according to the present embodiment. As shown in FIG. 5A, the filter data is data indicating a predetermined area in which information extracted as partial data from information included in relay data is associated with each type of relay data. . In FIG. 5A, the numbers shown in the previous line of the column “filter data” are numbers that are used for convenience to explain the area in which each piece of information is described in one filter data. In other words, it indicates that the information included in the filter data, not the information included in the filter data, is described in the first to eighth byte areas of the filter data indicated in the respective numeric columns.

For example, when the identifier included in the relay data acquired by the extraction unit 20221 is CAN-ID100, the extraction unit 20221 selects filter data corresponding to the CAN-ID100 from the filter data stored in the storage unit 204. read out. When the filter data corresponding to the type of acquired relay data is read, the extraction unit 20221 includes information included in the read filter data and information included in the acquired relay data (hereinafter referred to as relay data information). Calculate the logical product of information contained in the same area. Here, the description will be continued assuming that the relay data information included in the relay data of CAN-ID100 acquired by the extraction unit 20221 is [2FFFFFFF1E21A9F1]. In this case, the extraction unit 20221 calculates the logical product of the information included in the same area in the filter data [FFFFFFFF00000000] read from the storage unit 204 and the relay data information [2FFFFFFF1E21A9F1] of the acquired relay data. In this case, the logical product calculated by the extraction unit 20221 is [2FFFFFFF00000000], and only the relay data value [2FFFFFFF] of the first to fourth bytes remains in the relay data information of the relay data, and the relay In the data information, the relay data value of the 5th to 8th bytes is [00000000].

That is, in this embodiment, a predetermined area (first to fourth bytes in the example of CAN-ID 100 in FIG. 5) to be extracted from the relay data information is a radix (in this embodiment, a hexadecimal number). Data that is indicated by a radix F) and that indicates an area that does not need to be extracted from the relay data information as zero is determined in advance for each type of relay data and stored in the storage unit 204 as filter data. In the present embodiment, filter data predetermined for each type of data transmitted by each first communication node connected to the first communication line A is stored in the storage unit 204 in association with each other. Then, the extraction unit 20221 calculates the logical product of the filter data stored in advance in this way and the relay data information included in the relay data acquired from the relay data specifying unit 2021, so that the relay data information includes Relay data information described in an area to be extracted is described as it is, and data in which information described in an area not corresponding to the area is zero can be extracted from the relay data as partial data. As described above, when the relay data information of the relay data acquired by the extraction unit 20221 is [2FFFFFFF1E21A9F1] and the filter data corresponding to the type of the relay data is [FFFFFFFF00000000] illustrated in FIG. 5 as an example, The extraction unit 20221 extracts partial data including information [2FFFFFFF00000000] from the relay data.

When the extraction unit 20221 extracts partial data from the relay data acquired from the relay data identification unit 2021, the extraction unit 20221 adds the type of acquired relay data to the extracted partial data and causes the partial change determination unit 20222 to acquire the partial data.

The partial change determination unit 20222 determines whether the partial data acquired from the extraction unit 20221 is change data that has changed from partial data extracted from the same type of relay data received by the reception unit 201 last time. To do. A specific example of the operation of the partial change determination unit 20222 will be described. When the partial data is acquired from the extraction unit 20221, the partial change determination unit 20222 uses the type added to the acquired partial data (the same type as the relay data including the partial data; hereinafter referred to as the type of partial data). Reference is made to information contained in the partial data of the same type and previously stored in the storage unit 204 as the latest relay data described later. For the acquired partial data, the partial change determination unit 20222 determines whether the information included in the partial data has changed from the information included in the latest relay data referred to.

Here, the latest relay data according to this embodiment will be described. FIG. 5B shows an example of the latest relay data according to the present embodiment. As described later, the latest relay data according to the present embodiment is partial data that the partial change determination unit 20222 has previously determined to be change data, and every time the partial change determination unit 20222 determines that it is change data, As shown in FIG. 5B as an example, the data is stored as the latest relay data in the storage unit 204 in association with each type of partial data.

For example, as described above, the information included in the partial data extracted by the extraction unit 20221 is [2FFFFFFF00000000], and the information included in the latest relay data corresponding to the type of the partial data is illustrated in FIG. 5B. In the case of [1FFFFFFF00000000] shown as an example, the partial change determination unit 20222 determines the partial data as change data.

When the partial change determination unit 20222 determines that the partial data acquired from the extraction unit 20221 is change data, the partial change determination unit 20222 displays information included in the latest relay data stored in the storage unit 204 corresponding to the type of the partial data. It is updated and stored with the information included in the partial data, and the transmission unit 203 acquires it as change data. On the other hand, if the partial change determination unit 20222 determines that the partial data acquired from the extraction unit 20221 is not change data, the partial change determination unit 20222 does not store the information included in the acquired partial data in the storage unit 204 as the latest relay data. Is discarded.

When the transmission unit 203 acquires the change data from the partial change determination unit 20222, the transmission unit 203 transmits and relays the acquired change data to the second communication line B as described above.

The above is the detailed description of the data relay device 20 according to the present embodiment. The functional configuration included in the processing unit 202 described above may be realized by the processing unit 202 interpreting and executing a program stored in advance in the storage unit 204 to function as each functional configuration. .

In this case, the extraction unit 20221 that acquires the relay data specified by the relay data specification unit 2021 actually stores the relay data specified by the processing unit 202 functioning as the relay data specification unit 2021 in the storage unit 204. The processing unit 202 functioning as the extraction unit 20221 acquires the relay data by reading it from the storage unit 204. Similarly, the partial change determination unit 20222 that acquires the partial data extracted by the extraction unit 20221 actually stores the partial data extracted by the processing unit 202 functioning as the extraction unit 20221 in the storage unit 204, It is assumed that the processing unit 202 functioning as the change determination unit 20222 acquires the partial data by reading it from the storage unit 204.

Next, the processing of the processing unit 202 described above will be described with reference to the flowchart shown in FIG. Note that the process shown in the flowchart of FIG. 6 is started when power supply to the data relay apparatus 20 is started, and is ended when power supply is stopped.

In step S101, the processing unit 202 functions as the relay data specifying unit 2021, and determines whether or not data has been acquired from the receiving unit 201. If the processing unit 202 determines in step S101 that data has been received, the processing unit 202 proceeds to step S102. On the other hand, when determining that the data is not received in step S101, the processing unit 202 repeats the process of step S101.

In step S102, the processing unit 202 functions as the relay data specifying unit 2021, and, as described above, refers to the relay information stored in the storage unit 204 and determines whether the data acquired in step S101 is relay data. Judge whether or not. If the processing unit 202 determines in step S102 that the acquired data is relay data, the processing unit 202 causes the extraction unit 20221 to acquire the relay data and proceeds to step S103. On the other hand, when determining in step S102 that the acquired data is not relay data, the processing unit 202 advances the processing to step S107.

In step S103, the processing unit 202 functions as the extraction unit 20221, reads out filter data corresponding to the type of relay data acquired from the relay data specifying unit 2021, from the storage unit 204, and outputs partial data from the relay data as described above. Is extracted and is acquired by the partial change determination unit 20222. When the processing of step S103 is completed, the processing unit 202 proceeds to step S104.

In step S104, the processing unit 202 functions as the partial change determination unit 20222, and refers to information included in the latest relay data stored in the storage unit 204 that is the same type as the partial data acquired from the extraction unit 20221. Thus, as described above, it is determined whether or not the partial data acquired from the extraction unit 20221 is change data. If the processing unit 202 determines in step S104 that the partial data acquired from the extraction unit 20221 is change data, the processing unit 202 proceeds to step S105. On the other hand, when determining in step S104 that the partial data acquired from the extraction unit 20221 is not change data, the processing unit 202 proceeds to step S107.

In step S105, the processing unit 202 functions as the partial change determination unit 20222. As described above, the processing unit 202 converts the information included in the latest relay data corresponding to the type of change data acquired and determined from the extraction unit 20221 into the change Update with the information contained in the data. When the processing of step S105 is completed, the processing unit 202 proceeds to step S106.

In step S106, the processing unit 202 functions as the partial change determination unit 20222, and causes the transmission unit 203 to acquire the change data determined in step S104. When the process of step S106 is completed, the processing unit 202 returns the process to step S101.

When the processing unit 202 proceeds from step S102 to step S107, the processing unit 202 functions as the relay data specifying unit 2021, and discards the data acquired from the receiving unit 201. On the other hand, when the processing unit 202 proceeds from step S104 to step S107, the processing unit 202 functions as the partial change determination unit 20222 and discards the partial data acquired from the extraction unit 20221.

The above is description of the process of the process part 202 which concerns on this embodiment. In general, the information included in the relay data includes a header, a CRC (Cyclic Redundancy Check), and the like in addition to the information transmitted to the destination communication node using the relay data. Even if there is no change in the information transmitted to the communication node, other information may change. Therefore, even if any of the information included in the same type of relay data changes, even if the relay data is relayed as change data, the frequency at which any of the information included in the relay data changes is relative Therefore, the reduction amount of relay data in the relay destination communication line is low.

On the other hand, the data relay device 20 according to the present embodiment does not relay the relay data as change data when any of the information included in the relay data changes, but the information included in the relay data. Only the change data in which the information described in the predetermined area is changed is relayed. That is, according to the data relay device 20 according to the present embodiment, when only the information transmitted to the destination communication node with the relay data is changed, the partial data extracted from the relay data is relayed as change data. The amount of relay data in the relay destination communication line (second communication line B in this embodiment) can be greatly reduced.

As described above, data transmitted and received in a network configured in a mobile body such as a vehicle is classified by type, but information (parameters) included in one type of data is also classified by type. The data transmitted and received in a network configured in a moving body such as a vehicle includes a plurality of types of information (information such as vehicle speed and engine speed), and a relay destination communication node (hereinafter referred to as a relay). In some cases, unnecessary information is also included. Therefore, by applying the data relay device 20 according to the present embodiment to a network configured in a moving body such as a vehicle, information necessary for the relay destination node among a plurality of types of information included in the relay data is obtained. Only when there is a change (for example, when there is a change in only the vehicle speed, which is necessary information among the vehicle speed and engine speed), the partial data extracted from the information indicating the changed information is changed data. The amount of relay data in the relay destination communication line (in this embodiment, the second communication line B) can be greatly reduced.

As an example of a network configuration in which the effect of the data relay device 20 according to the present embodiment can be maximized, for example, relay data transmitted from a certain communication node is a destination communication node (hereinafter referred to as a destination node). , And a plurality of types of information transmitted to the relay destination node, and all types of information are necessary for the destination node connected to the same communication line as the communication node. An example is when several types of information among all types are required.

Further, according to the data relay device 20 according to the present embodiment, optimal filter data can be determined in advance for each type of relay data according to the configuration of the network to be applied. For example, according to the present embodiment, When applying a network configured in the vehicle as the data relay device 20, even if the network configuration is different for each vehicle type, the amount of relay data in the communication line of the relay destination is determined regardless of the different configuration. It can be greatly reduced.

In the first embodiment, the data relay device 20 has been described as relaying data from the first communication line A to the second communication line B. However, the data relay device 20 according to the present embodiment is similar to the process described in the first embodiment, in the first communication line among the data transmitted from each of the second communication nodes 30a to 30b. Data of a predetermined type to be relayed to A may be relayed from the second communication line B to the first communication line A. Further, the data relay device 20 according to the present embodiment has the same configuration as the configuration that relays data from the first communication line A to the second communication line B as described in the first embodiment. It is configured so that data can be relayed from the communication line B to the first communication line A, added to the data relay device 20 according to the present embodiment, and the data from the first communication line A to the second communication line B is transferred. The relay and the relay from the second communication line B to the first communication line A may be performed in parallel.

Further, in the first embodiment, as is apparent from the description of step S104 and step S105, after the partial change determination unit 20222 determines that the data is change data, the change data is the information included in the change data. The information included in the latest relay data corresponding to the type of is updated. However, in another embodiment, the latest relay data may be updated with information included in the relay data regardless of whether the data is change data. More specifically, the relay data specifying unit 2021 causes the change data determining unit 2022 to acquire the relay data, and updates the information included in the latest relay data of the same type as the relay data with the information included in the relay data. May be. In this case, when the partial change determination unit 20222 acquires partial data from the extraction unit 20221, the partial change determination unit 20222 uses the same type of filter data as the type of the partial data and compares the partial data with the partial data from the latest relay data of the same type. Extract data to do. The partial change determination unit 20222 may compare the data extracted from the latest relay data with the partial data acquired from the extraction unit 20221 to determine whether the partial data is change data.

In the first embodiment, when there is a change in information included in the partial data extracted by the extraction unit 20221, the partial data is acquired as change data by the transmission unit 203 and relayed. . However, in another embodiment, when there is a change in information included in the partial data extracted by the extraction unit 20221, the transmission unit 203 acquires the relay data extracted from the partial data as it is and relays it. May be. In this case, as an example, when the extraction unit 20221 extracts partial data from the relay data, the type of the acquired relay data is added to the extracted partial data and the partial change determination unit 20222 acquires the partial data. The change determination unit 20222 is made to acquire. Then, the partial change determination unit 20222 determines whether or not the partial data acquired from the extraction unit 20221 has changed as described in the first embodiment. The relay data acquired together with the data may be acquired by the transmission unit 203 as change data and transmitted.

(First modification of the first embodiment)
The case where the data relay apparatus 20 according to the first modification of the first embodiment is mounted on a moving body such as a vehicle (hereinafter referred to as the host vehicle) will be described as an example. FIG. 7 is a functional block diagram showing a more detailed functional configuration of the processing unit 202 according to this modification. The processing unit 202 according to this modification is different from the processing unit 202 according to the first embodiment in that it further includes a relay timing determination unit 2023. The relay timing determination unit 2023 according to the present modification is the first when the time measured from the predetermined timing start timing is within the predetermined length in the relay data described in the first embodiment. The direct relay data of a predetermined type to be transmitted and relayed to the second communication line B is directly transmitted to the transmitting unit 203 without causing the change data determining unit 2022 to determine as described in the first embodiment. Send it. That is, the processing unit 202 according to the modified example of the first embodiment is compared with the processing unit 202 according to the first embodiment in the information included in the data among the data acquired from the receiving unit 201. The difference is that the transmission unit 203 transmits not only the data that has changed but also the direct relay data described above.

A specific example of the relay timing determination unit 2023 according to this modification will be described. The relay timing determination unit 2023 according to the present modification sequentially acquires times counted by a timer (not shown). The timer (not shown) according to the present modification starts measuring time when a predetermined timing start timing arrives, and causes the relay timing determination unit 2023 to sequentially acquire the measured time as the measured time. As an example of the timing start timing according to this modification, there is a time when the ignition switch of the own vehicle is turned from OFF to ON, or when the ignition switch of the own vehicle is turned from ON to OFF.

When the relay data specifying unit 2021 according to the present modification specifies relay data as described in the first embodiment, the relay timing determining unit 2023 acquires the specified relay data. When the relay timing determining unit 2023 acquires relay data from the relay data specifying unit 2021, the relay timing determining unit 2023 further acquires a time measurement from a timer (not shown). When the relay data is acquired and the time measured when the relay data is acquired is acquired, the relay timing determination unit 2023 refers to the direct relay information stored in advance in the storage unit 204.

Here, direct relay information according to this modification will be described with reference to FIG. As shown in FIG. 8 as an example, the direct relay information according to the present modification corresponds to the type of relay data specified by the relay data specifying unit 2021 and the timing start timing of the clock time acquired from a timer (not shown). It is information indicating a direct relay period set in advance. The direct relay information shown as an example in FIG. 8 indicates the timing start timing for each of the two timing start timings when the ignition switch of the host vehicle changes from OFF to ON and when the ignition switch changes from ON to OFF. The reference direct relay period is shown in association with each type of relay data.

For example, the relay data of CAN-ID100 has a 500 ms length directly based on the timing of the timing when the ignition switch of the host vehicle changes from off to on and when it changes from on to off. Each relay period is set. In addition, the relay data of CAN-ID300 includes the time when the ignition switch of the host vehicle changes from on to off and when the time changes from off to on. Only a direct relay period having a length of 500 ms with reference to the timing start timing is set.

The relay timing determination unit 2023 refers to the direct relay information stored in the storage unit 204, and determines the direct relay period corresponding to both the type of acquired relay data and the time measured when the relay data is acquired. Determine whether it is set. The relay timing determination unit 2023 refers to the direct relay information, sets a direct relay period corresponding to both the type of acquired relay data and the time measured when the relay data is acquired, and When it is determined that the timed time is within the direct relay period, the acquired relay data is determined to be direct relay data, and is directly acquired by the transmission unit 203. On the other hand, the relay timing determination unit 2023 refers to the direct relay information, and the direct relay period corresponding to both the type of acquired relay data and the time measured when the relay data is acquired is not set. When it is determined, the change data determination unit 2022 described in the first embodiment is caused to acquire the relay data acquired from the relay data specifying unit 2021. In addition, the relay timing determination unit 2023 refers to the direct relay information, and the direct relay period corresponding to both the type of acquired relay data and the time measured when the relay data is acquired is set, When it is determined that the measured time exceeds the direct relay period, the change data determination unit 2022 described in the first embodiment is caused to acquire the relay data acquired from the relay data specifying unit 2021.

Note that the timer (not shown) according to this modification relays information indicating the timing for starting the timing, which serves as a reference for the timing, such as when the ignition switch of the host vehicle changes from off to on or from on to off. It may be added to the time measured by the timing determination unit 2023. As a result, the relay timing determination unit 2023 can determine which timing start timing is used as a reference for the timing measured from a timer (not shown).

If the relay timing determination unit 2023 acquires the relay data of the CAN-ID 300 from the relay data identification unit 2021 and acquires the relay data, the ignition switch of the host vehicle changes from OFF to ON from a timer (not shown). It is assumed that 230 ms of time measurement is further acquired with the time as the time measurement start timing. In this case, the relay timing determination unit 2023 refers to the direct relay information shown in FIG. 8 as an example, and associates both the CAN-ID 300 of the acquired relay data with the time measured when the relay data is acquired. It is recognized that the set direct relay period is set, and the set direct relay period is 500 ms on the basis of the time when the ignition switch of the host vehicle is changed from OFF to ON. In this case, the relay timing determination unit 2023 sets a direct relay period corresponding to both the CAN-ID 300 of the acquired relay data and the time measured when the relay data is acquired. It is determined that the time is within the direct relay period, and the information included in the latest relay data of the same type as the relay data stored in the storage unit 204 is updated with the information included in the relay data. The relay data is determined to be direct relay data and is directly acquired by the transmission unit 203.

On the other hand, if the relay timing determination unit 2023 acquires the relay data of the CAN-ID 300 from the relay data identification unit 2021 and acquires the relay data, the ignition switch of the own vehicle is turned from OFF to ON from a timer (not shown). A case is assumed in which a time measurement of 600 ms is further acquired with the time of change being the time measurement start timing. In this case, the relay timing determination unit 2023 refers to the direct relay information shown in FIG. 8 as an example, and associates both the CAN-ID 300 of the acquired relay data with the time measured when the relay data is acquired. It is recognized that the set direct relay period is set, and the set direct relay period is 500 ms on the basis of the time when the ignition switch of the host vehicle is changed from OFF to ON. In this case, the relay timing determination unit 2023 sets a direct relay period corresponding to both the CAN-ID 300 of the acquired relay data and the time measured when the relay data is acquired. When it is determined that the time exceeds the direct relay period, the relay data is acquired by the change data determination unit 2022 (extraction unit 20221) described in the first embodiment.

Also, if the relay timing determination unit 2023 acquires the relay data of the CAN-ID 300 from the relay data identification unit 2021, and when the relay data is acquired, the ignition switch of the host vehicle is switched from on to off from a timer (not shown). A case is assumed where a time measurement time of 300 ms is acquired with the time when the time has changed as a timing start timing. In this case, the relay timing determination unit 2023 refers to the direct relay information shown in FIG. 8 as an example, and associates both the CAN-ID 300 of the acquired relay data with the time measured when the relay data is acquired. Recognize that the specified direct relay period is not set. In this case, the relay timing determination unit 2023 determines that a direct relay period corresponding to both the type of acquired relay data and the time measured when the relay data is acquired is not set, and specifies relay data. The relay data acquired from the unit 2021 is acquired by the change data determination unit 2022 (extraction unit 20221) described in the first embodiment.

The change data determination unit 2022 according to the present modification acquires relay data determined by the relay timing determination unit 2023 that the direct relay period is not set. In addition, the transmission unit 203 according to this modification includes the direct relay data determined by the relay timing determination unit 2023 in which the direct relay period is set, and the partial change determination unit 20222 as described in the first embodiment. When the change data determined to be change data is acquired, the data is transmitted to the second communication line B and relayed.

The above is the detailed description of the data relay device 20 according to this modification. In the present modification, the description given in the first embodiment is used for the explanation of the other processes not described above, the functional configuration of the processing unit 202, and the configuration of the data relay device 20. It omits as. The functional configuration included in the processing unit 202 described above is similar to the processing unit 202 according to the first embodiment, in which the processing unit 202 interprets and executes a program stored in the storage unit 204 in advance. You may implement | achieve by functioning as each function structure.

In this case, the relay timing determination unit 2023 that acquires the relay data specified by the relay data specification unit 2021 actually stores the relay data specified by the processing unit 202 functioning as the relay data specification unit 2021. And the processing unit 202 functioning as the relay timing determination unit 2023 acquires the relay data by reading it from the storage unit 204. Similarly, the extraction unit 20221 actually stores, in the storage unit 204, the relay data that the processing unit 202 that functions as the relay timing determination unit 2023 determines that it is not the direct relay period, and functions as the extraction unit 20221. Assume that the processing unit 202 to acquire the relay data by reading the relay data from the storage unit 204. Similarly, the partial change determination unit 20222 that acquires the partial data extracted by the extraction unit 20221 actually stores the partial data extracted by the processing unit 202 functioning as the extraction unit 20221 in the storage unit 204, It is assumed that the processing unit 202 functioning as the change determination unit 20222 acquires the partial data by reading it from the storage unit 204.

Next, the processing of the processing unit 202 described above will be described with reference to the flowchart shown in FIG. Note that the process shown in the flowchart of FIG. 9 is started when power supply to the data relay apparatus 20 is started, and is ended when power supply is stopped. Moreover, about the part which can use description of the process shown in the flowchart of FIG. 6 which shows the process of the process part 202 which concerns on 1st Embodiment among the processes shown in the flowchart of FIG. 9, it demonstrates as what uses the said description. Is omitted.

When determining that the data acquired in step S101 is relay data, the processing unit 202 functioning as the relay data specifying unit 2021 in step S102 according to this modification causes the relay timing determination unit 2023 to acquire the relay data, The process proceeds to step S201.

In step S201, the processing unit 202 functions as the relay timing determination unit 2023, and as described above, acquires the relay data from the relay data specifying unit 2021 and acquires the time measured from a timer (not shown). Then, the processing unit 202 refers to the relay information directly. As described above, the processing unit 202 has a direct relay period set for the relay data acquired from the relay data specifying unit 2021, and the time measured when the relay data is acquired is within the direct relay period. Judge whether there is. In step S201, the processing unit 202 sets the direct relay period to the relay data acquired from the relay data specifying unit 2021, and acquires the relay data and the acquired time count is within the direct relay period. When it is determined, the process proceeds to step S105. On the other hand, in step S201, the processing unit 202 has not set a direct relay period in the relay data acquired from the relay data specifying unit 2021, or has set a direct relay period in the relay data, and stores the relay data in the relay data. When it is determined that the acquired time count exceeds the direct relay period, the extraction unit 20221 is caused to acquire the relay data, and the process proceeds to step S103.

The processing unit 202 functioning as the extraction unit 20221 in step S103 of the present modification reads out filter data corresponding to the type of relay data determined not to set the direct relay period in step S201 from the storage unit 204, and has been described above. Thus, partial data is extracted from the relay data.

On the other hand, the processing unit 202 according to the present modification functions as the relay timing determination unit 2023 when it proceeds directly from the process of step S201 to step S105, and determines that it has been acquired within the direct relay period in step S201. The information included in the latest relay data of the same type as the relay data is updated with the information included in the relay data. When the processing unit 202 according to the present modification completes the process of step S105, the process proceeds to step S106.

When the processing unit 202 according to the present modification proceeds directly from step S201 to step S105 and then proceeds to step S106, the processing unit 202 functions as the relay timing determination unit 2023 in step S106, and directly proceeds to step S201. The transmission unit 203 is made to acquire the relay data determined to have been acquired within the relay period. When the processing unit 202 according to the present modification completes the process of step S106, the process returns to step S101.

The above is the description of the data relay device 20 according to this modification. According to the data relay device 20 according to the present modification, when a predetermined type of relay data is acquired within an arbitrary direct relay period based on an arbitrary timing start timing, partial data is obtained from the relay data. The relay data can be relayed directly without extraction. In particular, a communication node that starts power supply and starts processing when the ignition switch of the host vehicle changes from off to on by predetermining when the ignition switch of the host vehicle changes from off to on as a timing start timing. Is necessary only when performing initialization processing, etc., and after completing the initialization processing, relay data including unnecessary information can be directly relayed to the communication node. On the other hand, power supply is stopped when the ignition switch of the host vehicle changes from on to off by predetermining when the ignition switch of the host vehicle changes from on to off as a timing start timing. The communication node where power supply from the unit is started is necessary only to communicate with other communication nodes when entering the sleep state in order to reduce power consumption, and is not necessary except when entering the sleep state. Relay data including information can be directly relayed to the communication node.

(Second modification of the first embodiment)
FIG. 10 is a functional block diagram showing a more detailed functional configuration of the processing unit 202 according to this modification. Compared with the processing unit 202 according to the first embodiment, the processing unit 202 according to the present modification further includes a specific change data determination unit 20223 and a specific change determination unit 20224 in the change data determination unit 2022. Is different.

The specific change data determination unit 20223 is the type of target for determining whether the relay data including the change data determined by the partial change determination unit 20222 as partial data has undergone a predetermined specific change. It is determined whether the data is specific change relay data. A specific example of the specific change data determination unit 20223 will be described.

When the partial change determination unit 20222 according to this modification determines that the partial data acquired from the extraction unit 20221 is change data as described in the first embodiment, the partial change determination unit 20222 does not update the latest relay data, The change data determination unit 20223 acquires change data.

The specific change data determination unit 20223 refers to the specific change data information stored in advance in the storage unit 204 when acquiring change data from the partial change determination unit 20222.

Here, the specific change data information according to this modification will be described with reference to FIG. The specific change data information shown as an example in FIG. 11 includes an area in which the content of the predetermined specific change and the information for determining whether or not the specific change has been described are described in the acquired change data. , Information indicating the content of the information in association with each type of acquired change data.

Note that the inequality sign [>] shown in the column of the content of the specific change shown in the specific change data information shown as an example in FIG. 11 (change content 1 and change content 2 in the example shown in FIG. 11) is the inequality sign [ >] Indicates the content of changes exceeding the numerical value indicated by separating with a comma, and the inequality sign [<] indicated in the relevant column is indicated in the column where the inequality sign [<] is indicated. Shows the content of the change below the numerical value that is separated by commas.

Further, the position of information in the specific change data information shown as an example in FIG. 11 is the reference position of the area in the change data in which the information for determining whether or not a specific change has been made is described, and the amount of information Is the size of the area. The position and amount of information in the specific change data information will be described in more detail with reference to FIG. FIG. 12 is an example of data transmitted and received as a frame in the present invention. As shown in FIG. 12, the position of the information indicated by the specific change data information is a reference position of an area in which information for determining whether or not a specific change has been described in one frame. The amount of information is information indicating the size of the area in bits. FIG. 12 shows, as an example, data in which 8 bits [2F] are written in the 0th byte area and 4 bits [F] are written in the 3rd byte area. Note that the unit of the position of information indicated by the specific change data information need not be limited to bytes. Further, the unit of information amount indicated by the specific change data information need not be limited to bits.

For example, in the specific change data information shown as an example in FIG. 11, the vehicle speed is included as information for determining whether or not the change data of the CAN-ID 100 has undergone a specific change, and the vehicle speed is 0 in the change data. It is described in the 8-bit information amount in the byte area, and the two contents when the information described in the area as the specific change content exceeds [20] and below [1D] Are associated with CAN-ID 100, respectively. Furthermore, in the specific change data information shown as an example in FIG. 11, the engine speed is also included as information for determining whether or not the change data of the CAN-ID 100 has undergone a specific change. The number of rotations is described in the 8-byte information amount in the 3rd byte area, and the contents when the information described in the area exceeds [A0] as the contents of the specific change also correspond to CAN-ID100. It is shown.

However, the method of describing the position of information, the amount of information, and the content of the specific change indicated by the specific change data information shown in FIG. 11 is an example, and the specific change data determination unit 20223 and the specific change are described as described later. Any method may be used as long as the determination unit 20224 can interpret the information corresponding to the position of the information, the information amount, and the content of the specific change for each type of change data.

When the specific change data determination unit 20223 acquires the change data from the partial change determination unit 20222, the specific change data determination unit 20223 refers to the specific change data information stored in advance in the storage unit 204 and has the same type as the type of the acquired change data. It is determined whether or not it is indicated in the referred specific change data information. When the specific change data determination unit 20223 determines that the same type of the obtained change data is indicated in the referred specific change data information, the relay data including the change data is determined in advance as the specified change data. It is determined that the data is specific change relay data including information that is a target for determining whether or not a change has occurred. When determining that the relay data including the change data acquired from the partial change determination unit 20222 is the specific change relay data, the specific change data determination unit 20223 causes the specific change determination unit 20224 to acquire the change data. At this time, the change data acquired by the specific change determination unit 20224 by the specific change data determination unit 20223 is change data extracted from the relay data that is the specific change relay data. On the other hand, when the specific change data determination unit 20223 determines that the same type as the acquired change data type is not indicated in the referred specific change data information, the change data stored in the storage unit 204 Information included in the latest relay data of the same type is updated with information included in the change data, and the transmission unit 203 acquires the change data.

The specific change determination unit 20224 refers to the specific change data information stored in the storage unit 204 when the change data included in the specific change relay data is acquired from the specific change data determination unit 20223. The specific change determination unit 20224 refers to the specific change data information, and determines the position of information, the amount of information, and the content of the specific change indicated in association with the type of change data acquired from the specific change data determination unit 20223. Recognize each. Furthermore, the specific change determination unit 20224 reads the latest relay data of the same type as the acquired type of change data from the storage unit 204. Then, the specific change determination unit 20224 refers to information described in each of the acquired change data and the latest relay data read from the storage unit 204 with the amount of information recognized at the position of the recognized information. The specific change determination unit 20224 compares the information described in each of the acquired change data and the read latest relay data, and determines whether or not there is a change indicated by the content of the recognized specific change. To do.

The specific change determination unit 20224 is the amount of information recognized at the position of the recognized information, and the information described in each of the acquired change data and the read latest relay data is indicated by the content of the recognized specific change. When it is determined that there is a change, the change data is determined as change data having a specific change. When the specific change determination unit 20224 determines that the acquired change data is change data having undergone a specific change, the specific change determination unit 20224 uses the information included in the latest relay data of the same type as the change data stored in the storage unit 204 Update with the information included in the change data, and cause the transmission unit 203 to acquire the change data. On the other hand, when the specific change determination unit 20224 determines that the acquired change data is not change data having undergone a specific change, the specific change determination unit 20224 discards the change data.

For example, the specific change data information illustrated in FIG. 11 as an example is stored in the storage unit 204 in advance, and the specific change determination unit 20224 acquires the change data of [2FFFFFFF00000000], which is the type of CAN-ID100, Assume that the latest relay data of [1FFFFFFF2110F1BF] is the same type as that of the partial data and is read from the storage unit 204. In this case, the specific change determination unit 20224 firstly, the position of the information associated with the CAN-ID 100 by the specific change data information (0th byte), the information amount (8 bits), the content of the specific change (change content 1 : 20,>) and the content of the specific change (change content 2: 1D, <). Then, the specific change determination unit 20224 writes [2F] with the 8-bit information amount in the 0th byte of the acquired change data and the 8-bit information amount in the 0th byte of the latest relay data read out. Compared with [1F]. Since the change from [1F] to [2F] corresponds to the recognized specific change content (change content 1), that is, the change “greater than 20”, the specific change determination unit 20224 specifies the acquired change data. Judge that it is changed data.

The transmission unit 203 according to this modification is determined to have undergone a specific change by the type of change data determined by the specific change data determination unit 20223 and the specific change determination unit 20224 if it is not indicated in the specific change data information. When the change data is acquired, the acquired change data is transmitted to the second communication line B and relayed.

The above is the detailed description of the data relay device 20 according to this modification. As described in the first embodiment, the functional configuration included in the above-described processing unit 202 is configured so that each processing unit 202 interprets and executes a program stored in the storage unit 204 in advance. It may be realized by functioning as a configuration.

In this case, the extraction unit 20221 that acquires the relay data specified by the relay data specification unit 2021 actually stores the relay data specified by the processing unit 202 functioning as the relay data specification unit 2021 in the storage unit 204. The processing unit 202 functioning as the extraction unit 20221 acquires the relay data by reading it from the storage unit 204. Similarly, the partial change determination unit 20222 that acquires the partial data extracted by the extraction unit 20221 actually stores the partial data extracted by the processing unit 202 functioning as the extraction unit 20221 in the storage unit 204, It is assumed that the processing unit 202 functioning as the change determination unit 20222 acquires the partial data by reading it from the storage unit 204. Similarly, the specific change data determination unit 20223 that acquires the change data determined by the partial change determination unit 20222 actually stores the change data determined by the processing unit 202 functioning as the partial change determination unit 20222 in the storage unit 204. It is assumed that the processing unit 202 that stores and functions as the specific change data determination unit 20223 acquires the change data by reading the change data from the storage unit 204. Similarly, the specific change determination unit 20224 that acquires the change data from the specific change data determination unit 20223 is actually configured so that the processing unit 202 functioning as the specific change data determination unit 20223 stores the change data in the storage unit 204 and is specified. It is assumed that the processing unit 202 functioning as the change determination unit 20224 acquires the change data by reading it from the storage unit 204.

Next, the processing of the processing unit 202 according to this modification described above will be described with reference to the flowchart shown in FIG. Note that the process shown in the flowchart of FIG. 13 is started when power supply to the data relay apparatus 20 is started, and is ended when power supply is stopped. Moreover, about the part which can use description of the process shown in the flowchart of FIG. 6 which shows the process of the process part 202 which concerns on 1st Embodiment among the processes shown in the flowchart of FIG. 13, it demonstrates as what uses the said description. Is omitted.

In step S104, the processing unit 202 according to the present modification functions as the partial change determination unit 20222 as described in the first embodiment, and determines that the partial data acquired from the extraction unit 20221 is change data. The process proceeds to step S301. On the other hand, when determining in step S104 that the partial data acquired from the extraction unit 20221 is not change data, the processing unit 202 proceeds to step S107.

In step S301, the processing unit 202 functions as the specific change data determination unit 20223, and determines whether or not the relay data including the change data acquired from the partial change determination unit 20222 is the specific change relay data as described above. . When the processing unit 202 determines in step S301 that the relay data including the acquired change data is the specific change relay data, the processing unit 202 advances the process to step S302. On the other hand, when the processing unit 202 determines in step S301 that the relay data including the acquired change data is not the specific change relay data, the process proceeds to step S105.

In step S302, the processing unit 202 functions as the specific change determination unit 20224, and determines whether or not the change data acquired from the specific change data determination unit 20223 is the change data having a specific change as described above. When the processing unit 202 determines in step S302 that the acquired change data is change data having undergone a specific change, the processing unit 202 advances the process to step S105. On the other hand, when the processing unit 202 determines in step S302 that the acquired change data is not change data having undergone a specific change, the processing unit 202 proceeds to step S107.

When the processing unit 202 according to this modification proceeds from step S301 to step S105, the processing unit 202 functions as the specific change data determination unit 20223 in step S105, and includes information included in the change data acquired in step S301. The information included in the latest relay data of the same type as the change data stored in the storage unit 204 is updated. When the processing of step S105 is completed, the processing unit 202 proceeds to step S106.

When the processing unit 202 according to this modification advances the processing from step S301 to step S105 and then performs the processing of step S106, the processing unit 202 functions as the specific change data determination unit 20223 in step S106 and is acquired in step S301. The changed data is acquired by the transmission unit 203 and relayed.

On the other hand, when the processing unit 202 according to this modification proceeds from step S302 to step S105, the processing unit 202 functions as the specific change determination unit 20224 in step S106, and the change data determined to have undergone the specific change in step S302. The information included in the latest relay data of the same type as the change data stored in the storage unit 204 is updated with the included information. When the processing of step S105 is completed, the processing unit 202 proceeds to step S106.

When the processing unit 202 according to this modification advances the processing from step S302 to step S105 and then performs the processing of step S106, the processing unit 202 functions as the specific change determination unit 20224 in step S106, and the specific change in step S302. The change data determined to have been transmitted is acquired by the transmission unit 203 and relayed.

When the processing unit 202 according to the present modification proceeds from step S302 to step S107, the processing unit 202 functions as the specific change determination unit 20224 in step S107, and discards the change data acquired in step S302.

The above is the description of the data relay device 20 according to this modification. As an example of relay data suitable for relaying by the data relay device 20 according to the present modification, a system for automatically locking the door of the host vehicle when the vehicle speed of the host vehicle exceeds a predetermined vehicle speed. Relay the communication node of the system or the communication node of the system that automatically starts detecting the distance to surrounding objects with the radar mounted on the own vehicle when the vehicle speed of the own vehicle falls below a predetermined vehicle speed One example is relay data. For such communication nodes, the relay data including the vehicle speed is relayed only when the vehicle speed of the host vehicle exceeds a predetermined vehicle speed, thereby further reducing the data amount on the communication line of the relay destination. be able to. Therefore, when relay data having such a communication node as a relay destination is relayed by the data relay device 20 according to the present modification, predetermined information (for example, vehicle speed and engine speed) is described as described above. For example, the change data including the information indicating the data of the relay destination can be relayed to the relay destination communication line only when the specific change described above is performed, whereby the amount of data in the relay destination communication line can be further reduced.

(Second Embodiment)
FIG. 14 is a block diagram showing a schematic configuration of the network 2 that relays data by the data relay device 50 according to the first embodiment of the present invention. The first communication nodes 40a to 40b and the data relay device 50 are each connected to the first communication line A. The second communication nodes 60a to 60b and the data relay device 50 are each connected to the second communication line B. The data relay device 50 is connected to each of the first communication line A and the second communication line B, and relays a predetermined type of data flowing in one communication line to the other communication line. To do. In the description of the present embodiment, as in the first embodiment, a case where the communication protocol used in the network 2 is CAN will be described as an example. Moreover, in this embodiment, the case where the network 2 is a network comprised in the own vehicle is demonstrated as an example. In addition, data in the following description is assumed to be expressed in hexadecimal numbers as an example.

Each of the communication nodes (in this embodiment, the first communication nodes 40a to 40b) connected to the first communication line A is connected to the first communication line A described in the first embodiment. Each of the first communication nodes is the same communication node, and different types of predetermined data are exchanged at an arbitrary timing as in the first communication node described in the first embodiment. Send and receive. Here, as described in the first embodiment, the data type is a type divided by an identifier (CAN-ID in this embodiment) included in the data. Each of the first communication nodes 40a to 40b also receives data addressed to itself among the data relayed by the data relay device 50. In addition, each of the first communication nodes 40a to 40b operates during a period in which the ignition switch of the host vehicle is on.

The data relay device 50 has a predetermined type to relay to one of the second communication nodes connected to the second communication line B in the data transmitted by the first communication nodes 40a to 40b. The first relay data is transmitted to the second communication line B and relayed. Further, the data relay device 50 relays data to any one of the first communication nodes 40a to 40b connected to the first communication line A among the data transmitted by the second communication nodes 60a to 60b. A predetermined type of second relay data is transmitted to the first communication line A to be relayed. In addition, the data relay device 50 according to the present embodiment also performs processing based on the state of the ignition switch of the host vehicle, the state of the second communication node connected to the second communication line B, and the like. Further, it is assumed that the data relay device 50 according to the present embodiment is supplied with power from a power storage unit such as a battery throughout a period in which the ignition switch of the host vehicle is off. Details of the data relay device 50 according to the present embodiment will be described later.

Each of the second communication nodes 60a to 60b is connected to the second communication line B, and in the same manner as each of the first communication nodes 40a to 40b described above, a frame of a format defined by the CAN protocol is used. Send and receive as data. Each of the second communication nodes 60a to 60b also receives data addressed to itself among data relayed by the data relay device 50. Each of the second communication nodes 60a to 60b according to the present embodiment operates by being supplied with power from a power storage unit (not shown) such as a battery even when the ignition switch of the host vehicle is off.

In addition, each of the second communication nodes 60a to 60b according to the present embodiment, for example, when not transmitting data within a predetermined period, continues at least data reception and performs other processing. A state of performing processing for suppressing power consumption such as temporarily stopping (hereinafter referred to as a power consumption suppression state) is performed. Further, each of the second communication nodes (second communication nodes 60a to 60b in the present embodiment) connected to the second communication line B is the other second communication node in the power consumption suppression state. When transmitting data, a process of transmitting data indicating an instruction to return to a normal operation state in which a process for suppressing power consumption is stopped and a process based on the data can be transmitted first (hereinafter referred to as a return instruction process) Also do. And in this embodiment, it grasps | ascertains the state (power consumption suppression state, a normal operation state, etc.) of each other 2nd communication node connected to the 2nd communication line B, and according to the grasped state. Connect to the second communication line B by providing all or some of the second communication nodes connected to the second communication line B with a function for processing (for example, a return instruction process). It is assumed that a so-called network management function for managing the state of all or part of the second communication nodes is realized. The data relay device 50 according to the present embodiment also has a function for realizing the network management function described above. The network management function described above may be realized using any known technique.

The schematic configuration of the network 1 shown in FIG. 14 shows an example in which two first communication nodes of the first communication nodes 40a to 40b are connected to the first communication line A. The first communication node connected to the first communication line A may be less than 2 or 3 or more. In addition, in the schematic configuration of the network 1 illustrated in FIG. 14, a case where two second communication nodes of the second communication nodes 60 a to 60 b are connected to the second communication line B is illustrated as an example. The second communication node connected to the second communication line B may be less than 2 or 3 or more.

FIG. 15 is a block diagram showing a schematic configuration of the data relay device 50 according to the present embodiment. The data relay device 50 according to the present embodiment includes a first reception unit 401, a processing unit 402, a second transmission unit 403, a storage unit 404, a second reception unit 405, and a first transmission unit. 406.

Each of the first reception unit 401 and the second transmission unit 403 is the same component as each of the reception unit 201 and the transmission unit 203 described in the first embodiment, and performs the same operation. .

The processing unit 402 is typically realized by an electronic component mainly composed of an integrated circuit such as an LSI, a microcomputer, and a CPU. Among the data acquired from the first receiving unit 401, the processing unit 402 The second transmission unit 403 is caused to transmit data whose information is changed. In addition, the processing unit 402 according to the present embodiment transmits, to the first transmission unit 406 to be described later, data in which information included in the data has changed among data acquired from the second reception unit 405 to be described later. Send it. In addition, the processing unit 402 according to the present embodiment also operates based on the state of the ignition switch of the host vehicle and the state of the second communication node connected to the second communication line B. A detailed description of the processing unit 402 according to the present embodiment will be described later.

The storage unit 404 stores the filter data and the relay data information described in the first embodiment, similarly to the storage unit 204 according to the first embodiment. However, the storage unit 404 according to the present embodiment is included in the first relay data predetermined to be transmitted and relayed to the second communication line B among the data acquired from the first receiving unit 401. The first relay information indicating the same identifier as the identifier to be transmitted and the second predetermined value to be transmitted and relayed to the first communication line A in the data acquired from the second receiving unit 405 described later. Two pieces of relay data information including second relay information indicating the same identifier as the identifier included in the relay data are stored. In addition, the storage unit 404 according to the present embodiment associates first filter data determined in advance for each type of data transmitted by each first communication node connected to the first communication line A. In addition to storing in advance, second filter data determined in advance for each type of data transmitted by each second communication node connected to the second communication line B is also stored in advance. Further, the storage unit 404 according to the present embodiment also stores various information stored by the processing unit 402.

The second receiving unit 405 is typically realized by an interface circuit including a communication circuit that receives data from a connected communication line, a storage element (for example, a register), and the like. When data is transmitted from each of the second communication nodes (second communication nodes 60a to 60b in this embodiment) connected to the second communication line B, the transmitted data is received. When the data is received, the second receiving unit 405 causes the processing unit 402 to acquire the received data.

The first transmission unit 406 is typically realized by an interface circuit including a communication circuit that transmits data to a connected communication line, a storage element (for example, a register), and the like. Is acquired, the acquired change data is transmitted to the first communication line A and relayed.

The above is the description of the schematic configuration of the data relay device 50 according to the present embodiment. Next, the processing unit 402 according to the present embodiment will be described in more detail.

FIG. 16 is a functional block diagram showing a more detailed functional configuration of the processing unit 402 according to the present embodiment. The processing unit 402 according to the present embodiment includes a relay data specifying unit 4021 and a change data determining unit 4022.

The relay data specifying unit 4021 has a predetermined type of first relay data to be relayed to the second communication line B from the data received by the first receiving unit 401 from the first communication line A. Is identified. Further, the relay data specifying unit 4021 is a second type of a predetermined type that relays to the first communication line A from the data received by the second reception unit 405 from the second communication line B. Specify relay data. A specific example of the operation of the relay data specifying unit 4021 will be described. When the relay data specifying unit 4021 acquires data from the first receiving unit 401, first, the first data stored in the storage unit 404 in advance is stored. With reference to the relay information, it is determined whether or not the acquired data is the first relay data of a predetermined type to be relayed to the second communication line B. On the other hand, when the relay data specifying unit 4021 acquires data from the second receiving unit 405, the relay data specifying unit 4021 first refers to the second relay information stored in advance in the storage unit 404, and the acquired data is It is determined whether or not the second relay data is of a type determined in advance to be relayed to the communication line A.

Here, the first relay information and the second relay information stored in the storage unit 404 will be described. FIG. 17 is a diagram illustrating an example of the first relay information and the second relay information stored in advance in the storage unit 404 according to the present embodiment. The first relay information shown in FIG. 17 includes the first relay data that is predetermined to be transmitted and relayed to the second communication line B among the data acquired from the first receiving unit 401. The same identifier as the included identifier (CAN-ID in this embodiment) is shown. In addition, the second relay information shown in FIG. 17 includes a second relay that is predetermined to be transmitted and relayed to the first communication line A in the data acquired from the second receiving unit 405. The same identifier as that included in the data is shown.

When the relay data specifying unit 4021 acquires data from the first receiving unit 401, the relay data specifying unit 4021 refers to the first relay information stored in the storage unit 404, and the identifier that is the same as the identifier included in the acquired data is It is determined whether or not it is indicated in the relay information 1. On the other hand, when the relay data specifying unit 4021 acquires data from the second receiving unit 405, the relay data specifying unit 4021 refers to the second relay information stored in the storage unit 404 and has the same identifier as the identifier included in the acquired data. Is determined in the second relay information.

When the identifier included in the data acquired from the first receiving unit 401 is indicated in the first relay information, the relay data specifying unit 4021 specifies the data as the first relay data and changes the data determining unit 4022. In addition, when the identifier included in the data acquired from the second receiving unit 405 is indicated in the second relay information, the relay data specifying unit 4021 specifies the data as the second relay data and changes data. The determination unit 4022 is made to acquire.

On the other hand, when the identifier included in the data acquired from the first receiving unit 401 is not indicated in the first relay information, the relay data specifying unit 4021 discards the acquired data. The relay data specifying unit 4021 discards the acquired data when the identifier included in the data acquired from the second receiving unit 405 is not indicated in the second relay information.

The change data determination unit 4022 receives partial data (hereinafter referred to as first partial data) that is predetermined so as to be extracted from the first relay data acquired from the relay data identification unit 4021, and the first reception unit 401 It is determined whether or not there is a change from the first partial data extracted from the same type of first relay data received last time. Further, the change data determination unit 4022 is configured so that partial data (hereinafter referred to as second partial data) predetermined to be extracted from the second relay data acquired from the relay data specifying unit 4021 is the second reception unit. It is determined whether or not 405 has changed from the second partial data extracted from the second relay data of the same type received last time.

A specific example of the change data determination unit 4022 according to this embodiment will be described in more detail. As illustrated in FIG. 16, the change data determination unit 4022 according to the present embodiment includes an extraction unit 40221, a partial change determination unit 40222, and a transmission destination state determination unit 40223. The first relay data and the second relay data specified by the relay data specifying unit 4021 are acquired by the extracting unit 40221 included in the change data determining unit 4022.

When acquiring the first relay data or the second relay data, the extracting unit 40221 acquires the first relay data or the second relay data acquired from the filter data stored in the storage unit 404 in advance. Partial data is extracted from each relay data using the filter data associated with each type. A specific example of the extraction unit 40221 will be described. FIG. 18A is a diagram illustrating an example of first filter data and second filter data according to the present embodiment. As shown in FIG. 18A, the first filter data includes a predetermined area in which information extracted as the first partial data from the information included in the first relay data is shown in the first relay data. This data is shown in association with each type of data. Further, as shown in FIG. 18A, the second filter data includes a predetermined area in which information extracted as second partial data from information included in the second relay data is shown in the second area. This data is shown in association with each type of relay data. In FIG. 18A, the numbers shown in the row before the column “first filter data” are the same numbers as those described in the first embodiment.

The method when the extraction unit 40221 extracts the first partial data from the first relay data using the first filter data uses the same method as the extraction unit 20221 according to the first embodiment. Description is omitted. The extraction unit 40221 uses the same method as the extraction unit 40221 according to the first embodiment as the method for extracting the second partial data from the second relay data using the second filter data. The description is omitted.

When the extraction unit 40221 extracts the first partial data from the first relay data acquired from the relay data identification unit 2021, the extraction unit 40221 adds the type of the acquired first relay data to the extracted first partial data. The partial change determination unit 40222 is made to acquire. On the other hand, when the second partial data is extracted from the second relay data acquired from the relay data specifying unit 4021, the type of the acquired second relay data is added to the extracted second partial data to determine partial change. The part 40222 is made to acquire.

The partial change determination unit 40222 is configured such that the first partial data obtained from the extraction unit 40221 is extracted from the first relay data of the same type received by the first reception unit 401 last time. It is determined whether or not the first change data has changed. In addition, the partial change determination unit 40222 has the second partial data obtained from the extraction unit 40221 extracted from the second relay data of the same type received by the second reception unit 405 last time. It is determined whether the second change data is changing from the partial data.

A specific example of the operation of the partial change determination unit 40222 will be described. When the partial change determination unit 40222 acquires the first partial data from the extraction unit 40221, the type (the same as the first relay data including the first partial data) added to the acquired first partial data. Refers to information included in the first partial data previously stored in the storage unit 404 as first latest relay data to be described later. To do. The partial change determination unit 40222 determines, for the acquired first partial data, whether the information included in the first partial data has changed from the information included in the referenced first latest relay data. . On the other hand, when the partial change determination unit 40222 acquires the second partial data from the extraction unit 40221, the type (second relay data including the second partial data and the type added to the acquired second partial data) The same type (hereinafter referred to as the second partial data type), and the information included in the second partial data previously stored in the storage unit 404 as second latest relay data to be described later Refer to The partial change determination unit 40222 determines, for the acquired second partial data, whether the information included in the second partial data has changed from the information included in the referenced second latest relay data. .

Here, the first latest relay data and the second latest relay data according to the present embodiment will be described. FIG. 18B is a diagram illustrating an example of the first latest relay data and the second latest relay data according to the present embodiment. The first latest relay data according to the present embodiment is first partial data that the partial change determination unit 40222 previously determined as the first change data, as will be described later. Each time the partial conversion determination unit 40222 determines that the first latest relay data is the first change data, the first latest relay data corresponds to the first latest change data stored in the storage unit 404. The information included in the relay data is updated and stored with the information included in the first change data. Further, the second latest relay data according to the present embodiment is the second partial data that the partial change determination unit 40222 has previously determined as the second change data, as will be described later. The second latest relay data is the second latest relay data corresponding to the type of the second change data stored in the storage unit 404 each time the partial change determination unit 40222 determines that the second change data is the second change data. The information included in the relay data is updated and stored with the information included in the second change data.

The partial change determination unit 40222 according to the present embodiment compares the first partial data acquired from the extraction unit 40221 with the first latest relay data that is the same as the type of the first partial data. The method for determining whether or not one partial data is the first change data uses the method described in the first embodiment, and a description thereof will be omitted. Also, the partial change determination unit 40222 according to the present embodiment compares the second partial data acquired from the extraction unit 40221 with the second latest relay data that is the same as the type of the second partial data, The method for determining whether or not the second partial data is the second change data uses the method described in the second embodiment, and a description thereof is omitted.

When the partial change determination unit 40222 determines that the first partial data acquired from the extraction unit 40221 is the first change data, the partial change determination unit 40222 causes the transmission destination state determination unit 40223 to acquire the first change data. On the other hand, when determining that the first partial data acquired from the extraction unit 40221 is not the first change data, the partial change determination unit 40222 discards the first partial data.

In addition, when the partial change determination unit 40222 determines that the second partial data acquired from the extraction unit 40221 is the second change data, the partial change determination unit 40222 causes the transmission destination state determination unit 40223 to acquire the second change data. On the other hand, when the partial change determination unit 40222 determines that the second partial data acquired from the extraction unit 40221 is not the second change data, the partial change determination unit 40222 discards the second partial data.

The transmission destination state determination unit 40223 includes a communication node state determination unit (not shown) and a vehicle state determination unit (not shown). A specific example of the transmission destination state determination unit 40223 will be described. When the first change data is acquired by the partial change determination unit 40222, the transmission destination state determination unit 40223 determines that the relay destination of the first change data is the second communication line B, and The first change data is acquired by the communication node state determination unit. On the other hand, when the second change data is acquired by the partial change determination unit 40222, the transmission destination state determination unit 40223 determines that the relay destination of the second change data is the first communication line A. Then, the second change data is acquired by the vehicle state determination unit.

When the communication node state determination unit acquires the first change data from the partial change determination unit 40222, it determines whether or not the second communication node to which the first change data is transmitted is in the normal operation state. to decide. When determining whether or not the second communication node that is the transmission destination of the first change data is in the normal operation state, the communication node state determination unit includes the second transmission unit 403 and the second reception unit 405. Is used to determine whether or not the second communication node is in a normal operation state by any known method based on the result of communication with the second communication node connected to the second communication line B. . The communication node state determination unit is a storage unit corresponding to the type of first change data when the second communication node to which the first change data acquired from the partial change determination unit 40222 is in the normal operation state. The information included in the first latest relay data of the type stored in 404 is updated with the information included in the first change data, and the second transmission unit 403 acquires the first change data. . On the other hand, the communication node state determination unit returns instruction data indicating an instruction to return to the normal operation state when the second communication node to which the first change data acquired from the partial change determination unit 40222 is not in the normal operation state. Is first acquired by the second transmission unit 403 and transmitted to the second communication node, and then the first latest version of the type stored in the storage unit 404 corresponding to the type of the first change data Information included in the relay data is updated with information included in the first change data, and the second transmission unit 403 acquires the first change data.

The vehicle state determination unit determines the ignition switch of the host vehicle when the transmission destination of the change data acquired from the partial change determination unit 40222 is the first communication node, that is, when the acquired change data is the second change data. It is determined whether or not is on. When the vehicle state determination unit determines that the ignition switch of the host vehicle is on, the vehicle state determination unit determines that the first communication node that is the transmission destination of the second change data acquired from the partial change determination unit 40222 is operating. And updating the information included in the second latest relay data of the type stored in the storage unit 404 corresponding to the type of the second change data with the information included in the second change data, The second change data is acquired by the first transmission unit 406 and transmitted to the first communication node. On the other hand, when the vehicle state determination unit determines that the ignition switch of the host vehicle is off, the first communication node to which the second change data acquired from the partial change determination unit 40222 is not operating. Judgment is made and the second change data is discarded.

When the second transmission unit 403 acquires the first change data from the communication node state determination unit, the second transmission unit 403 transmits the acquired first change data to the second communication node that is the transmission destination of the first change data. To do.

When the first transmission unit 406 acquires the second change data from the vehicle state determination unit, the first transmission unit 406 transmits the acquired second change data to the first communication node that is the transmission destination of the second change data. .

The above is the detailed description of the data relay device 50 according to the present embodiment. As described in the first embodiment, the functional configuration included in the processing unit 402 described above is configured so that each processing unit 402 interprets and executes a program stored in the storage unit 404 in advance. It may be realized by functioning as a configuration.

In this case, the extraction unit 40221 that acquires the first relay data and the second relay data specified by the relay data specification unit 4021 is actually a processing unit 402 that functions as the relay data specification unit 4021. Are stored in the storage unit 404, and the processing unit 402 functioning as the extraction unit 40221 stores the first relay data or the second relay data. It is obtained by reading from the storage unit 404. Similarly, the partial change determination unit 40222 that acquires the first partial data and the second partial data extracted by the extraction unit 40221 is actually extracted by the processing unit 402 that functions as the extraction unit 40221. The first partial data and the second partial data are stored in the storage unit 404, and the processing unit 402 functioning as the partial change determination unit 40222 stores the first partial data or the second partial data. It is assumed to be acquired by reading from the unit 404. Similarly, the transmission state determination unit 40223 (the vehicle state determination unit and the communication node state determination unit) that acquires the first change data and the second change data respectively determined by the partial change determination unit 40222 are actually The first change data and the second change data determined by the processing unit 402 functioning as the partial change determination unit 40222 are stored in the storage unit 404, and the transmission state determination unit 40223 (vehicle state determination unit, and It is assumed that the processing unit 402 functioning as a communication node state determination unit) acquires the first change data or the second change data by reading it from the storage unit 404.

Next, the processing of the processing unit 402 according to this embodiment described above will be described with reference to the flowchart shown in FIG. Note that the processing shown in the flowchart of FIG. 19 is started when power supply to the data relay device 50 is started, and is ended when power supply is stopped.

In step S401, the processing unit 402 functions as the relay data specifying unit 4021, and determines whether data is acquired from the first receiving unit 401 and whether data is acquired from the second receiving unit 405, respectively. to decide. If the processing unit 402 determines in step S401 that data has been acquired from either the first receiving unit 401 or the second receiving unit 405, the processing proceeds to step S402. On the other hand, when the processing unit 402 determines in step S401 that data has not been acquired from either the first receiving unit 401 or the second receiving unit 406, the processing unit 402 repeats the processing of step S401.

In step S402, the processing unit 402 functions as the relay data specifying unit 4021. As described above, when data is acquired from the first receiving unit 401 in step S401, the first stored in the storage unit 404 is stored. With reference to the relay information, it is determined whether or not the data acquired from the first receiving unit 401 in step S401 is the first relay data. When the processing unit 402 determines in step S402 that the acquired data is the first relay data, the processing unit 402 causes the extraction unit 40221 to acquire the first relay data. On the other hand, when determining in step S402 that the data acquired from the first reception unit 401 in step S401 is not the first relay data, the processing unit 402 advances the processing to step S411. On the other hand, in step S402, when the processing unit 402 acquires data from the second reception unit 405 in step S401, the processing unit 402 refers to the second relay information stored in the storage unit 404, and in step S401, the second relay information is stored. It is determined whether the data acquired from the receiving unit 405 is the second relay data. If the processing unit 402 determines in step S402 that the acquired data is the second relay data, the processing unit 402 causes the extraction unit 40221 to acquire the second relay data. On the other hand, when determining in step S402 that the data acquired from the second reception unit 405 in step S401 is not the second relay data, the processing unit 402 advances the processing to step S411.

In step S403, the processing unit 402 functions as the extraction unit 40221, and stores the first filter data corresponding to the type of the first relay data when the first relay data is acquired from the relay data specifying unit 4021. Read from 404, extract the first partial data from the first relay data as described above, and cause the partial change determination unit 40222 to acquire the first partial data. On the other hand, when acquiring the second relay data from the relay data specifying unit 4021 in step S403, the processing unit 402 reads out the second filter data corresponding to the type of the second relay data from the storage unit 404, and As described above, the second partial data is extracted from the second relay data, and is acquired by the partial change determination unit 40222. When the processing unit 402 completes the process of step S403, the processing proceeds to step S404.

In step S404, the processing unit 402 functions as the partial change determination unit 40222. When the first partial data is acquired from the extraction unit 40221, the processing unit 402 is the same type as the first partial data, and is stored in the storage unit 404. Whether the first partial data acquired from the extraction unit 40221 is the first change data as described above with reference to the information included in the first partial data stored last time as the first latest relay data Judge whether or not. When determining in step S404 that the first partial data acquired from the extraction unit 40221 is the first change data, the processing unit 402 advances the processing to step S405. On the other hand, when determining in step S404 that the first partial data acquired from the extraction unit 40221 is not the first change data, the processing unit 402 advances the processing to step S411. Further, when the processing unit 402 acquires the second partial data from the extraction unit 40221 in step S404, the processing unit 402 is the same type as the second partial data, and stores the second partial data in the storage unit 404 as the second latest relay data. With reference to the information included in the second partial data stored last time, as described above, it is determined whether or not the second partial data acquired from the extraction unit 40221 is the second change data. When determining in step S402 that the second partial data acquired from the extraction unit 40221 is the second change data, the processing unit 402 advances the processing to step S405. On the other hand, when determining in step S404 that the second partial data acquired from the extraction unit 40221 is not the second change data, the processing unit 402 advances the processing to step S411.

In step S405, the processing unit 402 functions as the transmission destination state determination unit 40223, and determines whether the data acquired from the partial change determination unit 40222 is the first change data or the second change data. Thus, it is determined whether or not the relay destination of each change data is the first communication line A. In step S405, when the partial change determination unit 40222 is allowed to acquire the first change data, the processing unit 402 determines that the relay destination of the first change data is not the first communication line A, and The first change data is acquired by the communication node state determination unit, and the process proceeds to step S407. On the other hand, when the second change data is acquired by the partial change determination unit 40222 in step S405, the processing unit 402 determines that the relay destination of the second change data is the first communication line A. The second change data is acquired by the vehicle state determination unit, and the process proceeds to step S406.

In step S406, the processing unit 402 functions as a vehicle state determination unit, acquires second change data from the transmission destination state determination unit 40223, and determines whether or not the ignition switch of the host vehicle is on. When the processing unit 402 determines in step S406 that the ignition switch of the host vehicle is on, the processing unit 402 determines that the first communication node connected to the first communication line A is in operation, The process proceeds to S409. On the other hand, when the processing unit 402 determines in step S406 that the ignition switch of the host vehicle is not on, the processing unit 402 determines that the first communication node connected to the first communication line A is not operating, The process proceeds to step S411.

In step S407, the processing unit 402 functions as a communication node state determination unit, acquires the first change data from the transmission destination state determination unit 40223, and transmits the second communication node of the transmission destination of the first change data. Is determined to be in a normal operation state. When the processing unit 402 determines in step S407 that the second communication node that is the transmission destination of the acquired first change data is in the normal operation state, the processing unit 402 proceeds to step S409. On the other hand, when the processing unit 402 determines in step S407 that the second communication node to which the acquired first change data is transmitted is not in the normal operation state, the processing unit 402 proceeds to step S408.

In step S408, the processing unit 402 functions as a communication node state determination unit, causes the second transmission unit 403 to first acquire the first change data acquired in step S407, and transmits the first change data. As described above, the return instruction data is first transmitted to the second communication node. When the processing unit 402 completes the process of step S408, the processing proceeds to step S409.

The processing unit 402 that has directly proceeded from step S406 to step S409 functions as a vehicle state determination unit in step S409, and is stored in the storage unit 404 corresponding to the type of the second change data acquired in step S406. Information included in the second latest relay data of a certain type is updated with information included in the second change data. When the processing unit 402 completes the process of step S409, the process proceeds to step S410.

After proceeding directly from step S406 to step S409, the processing unit 402 that performs the process of step S410 functions as a vehicle state determination unit, and the second change data acquired in step S406 is sent to the second transmission unit 403. Get it and send it.

The processing unit 402 that has directly proceeded from step S407 to step S409 or the processing unit 402 that has proceeded from step S408 to step S409 functions as a communication node state determination unit in step S409, and is obtained in step S407. The information included in the first latest relay data of the type stored in the storage unit 404 corresponding to the type of the one change data is updated with the information included in the first change data. When the processing unit 402 completes the process of step S409, the process proceeds to step S410.

The processing unit 402 that directly proceeds from step S407 to step S409, and the processing unit 402 that performs the processing of step S410 after proceeding from step S408 to step S409, obtains the first change data acquired in step S407 as the first change data. 2 is acquired and transmitted.

The processing unit 402 that has advanced the process from step S404 to step S411 functions as the partial change determination unit 40222 in step S411, and discards the first change data or the second change data acquired in step S404.

The processing unit 402 that has advanced the processing from step S406 to step S411 functions as a vehicle state determination unit in step S411, and discards the second change data acquired in step S406.

The above is the description of the processing of the processing unit 402 according to the present embodiment. In the present embodiment, as described above, the first communication node that operates throughout the period in which the ignition switch of the host vehicle is on is connected to the first communication line A, and the second communication line B is connected to the first communication line A. Is connected to a second communication node that operates by being supplied with power from a power storage unit (not shown) even when the ignition switch of the host vehicle is off. Then, according to the data relay device 50 according to the present embodiment, when the second communication node connected to the second communication line B is not in the normal operation state, the return instruction data indicating the return instruction is transmitted and Since the second communication node can return to the operation state, for example, the second communication node may suppress the power consumption by performing the above-described processing for suppressing the power consumption when data is not transmitted within a predetermined period. it can.

Although the present invention has been described in detail above, the above description is merely an example of the present invention in all respects and is not intended to limit the scope thereof. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention.

In addition, the above-described first embodiment, its modification, and the second embodiment may be combined in any way, for example, by relaying only changed data that has undergone specific changes while determining the relay timing. Good.

According to the present invention, it is possible to reduce the amount of data on a communication line as a relay destination, and for example, it is useful for a data relay device that relays data on a network configured in a mobile body such as an automobile.

1, 2

network

10a, 10b, 40a, 40b

first communication node

20, 50 data relay device 30A, 30B, 60A, 60B second communication node 201 receiving

unit

202, 402 processing unit 203 transmitting

unit

204, 404

storage unit

2021, 4021 Relay

data identification unit

2022, 4022 Change

data determination unit

20221, 40221

Extraction unit

20222, 40222 Partial change determination unit 2023 Relay timing determination unit 20223 Specific change data determination unit 20224 Specific change determination unit 401 First reception unit 403 Second transmission unit 405 Second reception unit 406 First transmission unit 40223 Transmission destination state determination unit

Claims

Relay data specifying means for specifying relay data of a predetermined type from data received from the first communication line;
Change data in which partial data predetermined to be extracted from the relay data specified by the relay data specifying means is changed from the partial data extracted from the same type of relay data received last time Change data judgment means for judging whether or not,
A data relay apparatus comprising: a first transmission unit that transmits and relays the change data determined by the change data determination unit to a second communication line.
Storage means for storing predetermined filter data in association with each type of relay data;
The change data determination means includes
Extracting means for extracting the partial data from the relay data using the filter data associated with the type of the relay data specified by the relay data specifying means;
The data relay apparatus according to claim 1, further comprising: a partial change determination unit that determines whether the partial data extracted by the extraction unit is the change data.
The storage means is predetermined as data having a radix in an area corresponding to an area from which the partial data is extracted in the relay data and having zero in an area corresponding to an area from which the partial data is not extracted in the relay data. The filter data is stored in association with each type of relay data,
The extraction unit extracts a result obtained by calculating a logical product of the relay data specified by the relay data specifying unit and the filter data associated with the type of the relay data as the partial data from the relay data. The data relay device according to claim 2.
Time measuring means for starting time measurement from a predetermined timing start timing;
Direct relay of a predetermined type so that the relay data specified by the relay data specifying means is transmitted and relayed to the second communication line when the time is within a predetermined length. Relay timing judgment means for judging whether or not the data;
Second transmission means for transmitting and relaying the relay data determined as the direct relay data by the relay timing determination means to the second communication line;
2. The change data determination unit according to claim 1, wherein the change data determination unit determines whether the partial data extracted from the relay data determined not to be the direct relay data by the relay timing determination unit is the change data. Data relay device.
Mounted on the vehicle,
5. The data relay device according to claim 4, wherein the time measuring unit starts measuring the time with the time when the ignition switch of the vehicle is turned on as the time measuring start timing.
Mounted on the vehicle,
5. The data relay device according to claim 4, wherein the time measuring unit starts measuring the time with the time when the ignition switch of the vehicle is turned off as the time measuring start timing.
The change data determination means includes
It is determined whether or not the relay data including the change data determined by the partial change determination means is a type of specific change relay data for determining whether or not the change data has undergone a predetermined specific change. Specific change data judging means to
A specific change determination unit for determining whether or not the change data extracted from the relay data determined to be the specific change relay data by the specific change data determination means has undergone the specific change;
The first transmission means is determined to have made the specific change by the change data included in the relay data determined not to be the specific change relay data by the specific change data determination means and the specific change determination means. The data relay apparatus according to claim 2, wherein the change data is transmitted to the second communication line and relayed.
The specific change determination unit extracts the change data extracted from the relay data determined to be the specific change relay data by the change determination data determination unit from the relay data of the same type received last time. The data according to claim 6, wherein it is determined that the specific change has been made when it is determined from the extracted change data that either one of a change exceeding a predetermined threshold value or a change below a predetermined threshold value has been made. Relay device.
Mounted on the vehicle,
A first communication node is connected to the first communication line for communication through a period in which an ignition switch of the vehicle is on.
The second communication line is connected to a second communication node that is fed from the power storage means of the vehicle,
A vehicle that determines whether or not the ignition switch is on when a transmission destination of the relay data including the partial data determined to be the change data by the partial change determination means is the first communication node State judging means;
Whether or not the second communication node is in a normal operation state when the transmission destination of the relay data including the partial data determined to be the change data by the partial change determination means is the second communication node Communication node state determination means for determining whether or not
A discarding unit for discarding the relay data including the partial data determined to be the change data by the partial change determination unit when the vehicle state determination unit determines that the ignition switch is not ON;
When the communication node state determining means determines that the second communication node is not in the normal operation state, a signal indicating an instruction to return the second communication node to the normal operation state is transmitted to the second communication line. Second transmitting means for
The first transmission means transmits the change data to the second communication line connected to the second communication node that is determined not to be in a normal operation state by the communication node state determination means. The data relay device according to claim 1, wherein the change data is transmitted after the signal is transmitted by two transmission means.
A relay data specifying step for specifying a predetermined type of relay data from the data received from the first communication line;
Change data in which partial data predetermined to be extracted from the relay data specified in the relay data specifying step is changed from the partial data extracted from the same type of relay data received last time A change data judgment step for judging whether or not,
A data relay method comprising: a transmission step of transmitting and relaying the change data determined in the change data determination step to a second communication line.