JP2006352323A - Adaptor for on-vehicle communication - Google Patents

Adaptor for on-vehicle communication Download PDF

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JP2006352323A
JP2006352323A JP2005173671A JP2005173671A JP2006352323A JP 2006352323 A JP2006352323 A JP 2006352323A JP 2005173671 A JP2005173671 A JP 2005173671A JP 2005173671 A JP2005173671 A JP 2005173671A JP 2006352323 A JP2006352323 A JP 2006352323A
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ecu
data
memory unit
storage area
memory
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JP5046353B2 (en
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Kenji Urashiro
健司 浦城
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To allow ECU to be shared regardless of the difference in a transmission line, or the like, and to reduce the processing load of the ECU. <P>SOLUTION: An adaptor 11 for on-vehicle communication has a memory section 16 and a processing section 15, and storage areas 16a-16f corresponding to each ECU connected to a wire harness W/H are grouped and allocated to the memory section 16. The ECU 12 writes transmission data to the storage area 16a corresponding to the transmission destination ECU of the memory section 16 in the adaptor 11 directly connected to itself when transmitting data to another ECU. The adaptor 11 transmits the contents of respective storage area sections 16a-16f of the memory section 16 to a transmission line periodically and copies them to the memory sections of all adaptors. The ECU 12 receives data by reading the contents of the storage area addressed to itself of the memory section 16 of the adaptor 11 connected to itself directly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、車載通信用アダプタに関し、詳しくは、車両内においてＥＣＵがワイヤハーネスを伝送路として信号送受を行う車載通信用アダプタに関するものである。   The present invention relates to an in-vehicle communication adapter, and more particularly, to an in-vehicle communication adapter in which an ECU transmits and receives signals using a wire harness as a transmission path in a vehicle.

近年、自動車メーカは環境問題に対応して排気ガスの低減や燃費向上を図るため、車体に配索されるワイヤハーネスの省線化を行って車両軽量化に努めており、その一環として自動車内にネットワーク（車載ＬＡＮ）を構築することで車内配索されるワイヤハーネスを省線化することが提案されている。そのため、車載される各種の電子制御ユニット（ＥＣＵ）も車載ＬＡＮに対応して信号を多重化して送受信できる通信機能を備えたものが現れている。   In recent years, automobile manufacturers have been making efforts to reduce the weight of vehicles by reducing the wiring harnesses that are routed to the vehicle body in order to reduce exhaust gas and improve fuel efficiency in response to environmental problems. In addition, it has been proposed to reduce the wire harness routed in the vehicle by constructing a network (vehicle-mounted LAN). For this reason, various electronic control units (ECUs) mounted on the vehicle have appeared that have a communication function that can multiplex and transmit / receive signals corresponding to the vehicle-mounted LAN.

ところで、各種の機能制御を行うＥＣＵは車両に配索されるワイヤハーネスにコネクタを介して接続されているが（特開２００３−１２４８２４号公報等）、従来の車載ＬＡＮではＥＣＵ内のＣＰＵにて機能制御（センサ、スイッチ、アクチュエータ等の制御を行うアプリケーション機能）や通信制御等の全処理を行っている。よって、車両にバージョンアップ等が発生してＬＡＮの伝送路等が異なると、ＥＣＵ本来の機能制御部分に変更がないにも関わらず、通信制御部分が変更となることで既存のＥＣＵを使用することができなくなり、ＥＣＵ全体を設計し直さなければならないという問題が生じる。さらに、ワイヤハーネスを伝送路とする通信速度が年々高速化されるなかで、ＥＣＵに処理負荷が集中するという問題もある。
特開２００３−１２４８２４号公報 By the way, although ECU which performs various function control is connected to the wire harness routed in the vehicle via a connector (Japanese Patent Laid-Open No. 2003-124824, etc.), in a conventional in-vehicle LAN, a CPU in the ECU It performs all processes such as function control (application functions for controlling sensors, switches, actuators, etc.) and communication control. Therefore, if a version upgrade or the like occurs in the vehicle and the LAN transmission path is different, the existing ECU is used because the communication control part is changed even though the original function control part of the ECU is not changed. This causes a problem that the entire ECU must be redesigned. Furthermore, as the communication speed using the wire harness as a transmission path is increased year by year, there is also a problem that processing loads are concentrated on the ECU.
JP 2003-124824 A

本発明は、上記問題に鑑みてなされたもので、伝送路等の違いに関わらずＥＣＵを共用化すると共にＥＣＵの処理負荷を軽減することを可能とすることを課題としている。   The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to share the ECU and reduce the processing load of the ECU regardless of the difference in the transmission path and the like.

前記課題を解決するため、本発明は、車両に配索されるワイヤハーネスの電線をＥＣＵ（電子制御ユニット）に中継接続し、該ＥＣＵが前記ワイヤハーネスを伝送路として通信できるようにした車載通信用アダプタであって、
前記ワイヤハーネスに接続される各ＥＣＵ毎に対応する記憶エリアを夫々区分けして割り当てられたメモリ部と、
前記ＥＣＵが別のＥＣＵにデータを送信する際、自己に直接接続されたアダプタの前記メモリ部の送信先ＥＣＵに対応する記憶エリアに送信データを書き込むと共に、前記メモリ部の前記各記憶エリア部の内容を定期的に前記伝送路に送出して全アダプタのメモリ部にコピーする処理部とを備え、
前記メモリ部がその内容をこれに直接的に接続されたＥＣＵから読み取り可能に構成することにより、ＥＣＵが別のＥＣＵからデータを受信する際、自己に直接的に接続されたメモリ部の自己に割り当てられた記憶エリアを介してデータを受信可能としたことを特徴とする車載通信用アダプタを提供している。 In order to solve the above-described problems, the present invention provides an in-vehicle communication in which an electric wire of a wire harness arranged in a vehicle is relay-connected to an ECU (electronic control unit) so that the ECU can communicate with the wire harness as a transmission path. Adapter for
A memory unit allocated to each storage area corresponding to each ECU connected to the wire harness;
When the ECU transmits data to another ECU, the transmission data is written in the storage area corresponding to the transmission destination ECU of the memory unit of the adapter directly connected to the ECU, and each of the storage area units of the memory unit A processing unit that periodically sends the contents to the transmission path and copies them to the memory unit of all adapters;
By configuring the memory unit so that the contents can be read from an ECU directly connected thereto, when the ECU receives data from another ECU, the memory unit directly connected to itself There is provided an in-vehicle communication adapter characterized in that data can be received through an allocated storage area.

前記構成とすると、送信元ＥＣＵから見た場合、宛先アドレスを付けてフレーム送信しなくても、自己に直接接続された車載通信用アダプタのメモリ部の送信先ＥＣＵに対応して割り当てられた記憶エリアに送信データを書き込むだけよい。一方、受信側ＥＣＵから見た場合、前記アダプタの処理部が定期的にメモリ部の内容のデータコピーを伝送路を介して他の全てのアダプタのメモリ部に書き込んで反映しているので、ＥＣＵは自己に直接接続されたアダプタのメモリ部の自己に割り当てられた記憶エリアを読み取るだけで他のＥＣＵからのデータを受信するのと同じことが実現できる。
したがって、ＥＣＵはデータ送受信を行う際にメモリ部にアクセスすれば足り、伝送路が変わったとしてもＥＣＵを既存のもので共用化でき品種増を抑制できると共に、ＥＣＵの設計負担も軽減することが可能となる。また、メモリ部の内容を伝送路に送出するための通信制御は処理部で行わせているので、ＥＣＵの処理負荷を低減でき、伝送路の高速化に対してもＥＣＵが十分対応することが可能となる。 With the above configuration, when viewed from the transmission source ECU, the memory allocated in correspondence with the transmission destination ECU of the memory unit of the in-vehicle communication adapter directly connected to itself without attaching a destination address and transmitting a frame It is only necessary to write the transmission data in the area. On the other hand, when viewed from the receiving ECU, the processing unit of the adapter periodically writes a data copy of the contents of the memory unit to the memory units of all other adapters via the transmission path and reflects them. It is possible to realize the same as receiving data from other ECUs simply by reading the storage area assigned to the memory unit of the adapter directly connected to itself.
Therefore, it is sufficient for the ECU to access the memory unit when performing data transmission / reception, and even if the transmission path is changed, the ECU can be shared with the existing one, the increase in the number of products can be suppressed, and the design burden of the ECU can be reduced. It becomes possible. In addition, since communication processing for sending the contents of the memory unit to the transmission path is performed by the processing unit, the processing load on the ECU can be reduced, and the ECU can sufficiently cope with speeding up of the transmission path. It becomes possible.

以上の説明より明らかなように、本発明によれば、ＥＣＵの通信制御機能を車載通信用アダプタに移しているので、伝送路に設計変更が生じても車載通信用アダプタで通信方式等の違いを吸収することができると共に、ＥＣＵはデータ送受信を行う際に車載通信用アダプタのメモリ部にアクセスすれば足りるためＥＣＵを既存のもので共用化することが可能となる。また、車載通信用アダプタに通信制御を行わせることでＥＣＵの処理負荷を低減することが可能となり、伝送路の高速化に対してもＥＣＵがボトルネックとなることなく十分対応することが可能となる。   As is clear from the above description, according to the present invention, the communication control function of the ECU is moved to the in-vehicle communication adapter. It is sufficient that the ECU only needs to access the memory unit of the on-vehicle communication adapter when transmitting and receiving data, so that the ECU can be shared by existing ones. In addition, it is possible to reduce the processing load of the ECU by causing the in-vehicle communication adapter to perform communication control, and it is possible to sufficiently cope with speeding up the transmission path without causing the ECU to become a bottleneck. Become.

以下、本発明の実施形態を図面を参照して説明する。
図１乃至図３は第１実施形態を示す。
本発明の車載通信用アダプタを備えた車載通信システム１０は、車両に配索されて車載ＬＡＮを構成するワイヤハーネスＷ／Ｈの端末に車載通信用アダプタ１１（コネクタ）を接続し、該アダプタ１１をＥＣＵ（電子制御ユニット）１２の回路基板に直付されたアダプタ嵌合部１３に嵌合接続し、ワイヤハーネスＷ／Ｈを伝送路としてフレームの送受信を行っている。なお、伝送路は、例えばＩＥＥＥ１３９４に代表される光ファイバーやメタルケーブル等の高速伝送路としている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment.
An in-vehicle communication system 10 having an in-vehicle communication adapter according to the present invention connects an in-vehicle communication adapter 11 (connector) to a terminal of a wire harness W / H that is arranged in a vehicle and constitutes an in-vehicle LAN. Are fitted and connected to an adapter fitting portion 13 directly attached to a circuit board of an ECU (electronic control unit) 12, and the frame is transmitted and received using the wire harness W / H as a transmission path. The transmission path is a high-speed transmission path such as an optical fiber or a metal cable represented by IEEE 1394, for example.

アダプタ１１は、ワイヤハーネスＷ／Ｈの電線にＩ／Ｏ部１９を介して接続される通信制御基板１４を内蔵すると共に、通信制御基板１４に接続された端子部２０をアダプタ先端面に露出している。
通信制御基板（通信制御手段）１４は、ＣＰＵやＡＳＩＣ等を用いて各種演算制御を行う処理部１５と、データ記憶を行うメモリ部１６とを備えている。
メモリ部１６は、図２に示すように、ＬＡＮに接続された複数のＥＣＵの夫々に対応した記憶エリア１６ａ〜１６ｆに分けてセグメント化されている。処理部１５は、メモリ内容送信部１７と、メモリ内容受信部１８とを備えている。
メモリ内容送信部１７は、メモリ部１６の各記憶エリア１６ａ〜１６ｆの全内容のデータコピーを生成してワイヤハーネスＷ／Ｈに接続された全アダプタに向けて送出する機能を有している。
メモリ内容受信部１８は、他のアダプタから受信したメモリ内容のデータを自己のメモリ部１６にコピーして反映させる機能を有している。 The adapter 11 incorporates the communication control board 14 connected to the electric wire of the wire harness W / H via the I / O part 19 and exposes the terminal part 20 connected to the communication control board 14 to the adapter front end surface. ing.
The communication control board (communication control means) 14 includes a processing unit 15 that performs various arithmetic controls using a CPU, an ASIC, and the like, and a memory unit 16 that stores data.
As shown in FIG. 2, the memory unit 16 is divided into storage areas 16a to 16f corresponding to the plurality of ECUs connected to the LAN. The processing unit 15 includes a memory content transmission unit 17 and a memory content reception unit 18.
The memory content transmission unit 17 has a function of generating a data copy of the entire contents of the storage areas 16a to 16f of the memory unit 16 and sending it to all adapters connected to the wire harness W / H.
The memory content receiving unit 18 has a function of copying and reflecting data of memory contents received from other adapters to its own memory unit 16.

ＥＣＵ１２は、センサ、スイッチあるいはアクチュエータを制御するアプリケーション部２４を有し各種演算制御を行う処理部２２と、データ記憶を行うメモリ部２３とを備え、アダプタ嵌合部１３にはＥＣＵ１２の回路基板と接続された端子部２５を露出している。処理部２２は、ワイヤハーネスＷ／Ｈで接続された他のＥＣＵにデータを送信する場合には、自己に接続されたアダプタ１１のメモリ部１６の送信先ＥＣＵに該当する記憶エリアにデータを書き込む構成としている。   The ECU 12 includes an application unit 24 that controls a sensor, a switch, or an actuator, and includes a processing unit 22 that performs various types of arithmetic control and a memory unit 23 that stores data. The adapter fitting unit 13 includes a circuit board of the ECU 12 The connected terminal portion 25 is exposed. When the processing unit 22 transmits data to another ECU connected by the wire harness W / H, the processing unit 22 writes the data in a storage area corresponding to the transmission destination ECU of the memory unit 16 of the adapter 11 connected to the processing unit 22. It is configured.

次に、車載通信システム１０の動作について説明する。
まず、ＥＣＵ１２からワイヤハーネスＷ／Ｈを介して接続された他のＥＣＵにデータを送信は、下記の動作となる。
例えば、ＥＣＵ１２がＥＣＵ−ｂに該当し、ＥＣＵ１２の処理部２２のアプリケーション部２４でＥＣＵ−ａに送信したいデータが生成された場合には、アダプタ１１のメモリ部１６のＥＣＵ−ａに対応する記憶エリア１６ａに当該データを書き込む。アダプタ１１のメモリ内容送信部１７は、定期的にメモリ部１６の各記憶エリア１６ａ〜１６ｆに保存された全内容のデータコピーをワイヤハーネスＷ／Ｈに接続された全アダプタに向けて送出し、全アダプタのメモリ部に反映させる。即ち、ＬＡＮに接続された全アダプタはメモリ部１６の記憶エリア１６ａ〜１６ｆが互いに同一になるようにしている。これにより、送信側のＥＣＵ１２は、送信したい相手のＥＣＵに対応する記憶エリア１６ａ〜１６ｆに送信データの書き込みを行うだけでよい。 Next, the operation of the in-vehicle communication system 10 will be described.
First, data transmission from the ECU 12 to another ECU connected via the wire harness W / H is performed as follows.
For example, when the ECU 12 corresponds to the ECU-b and the data to be transmitted to the ECU-a is generated by the application unit 24 of the processing unit 22 of the ECU 12, the memory corresponding to the ECU-a of the memory unit 16 of the adapter 11. The data is written in the area 16a. The memory content transmission unit 17 of the adapter 11 periodically sends a data copy of all the contents stored in the storage areas 16a to 16f of the memory unit 16 to all the adapters connected to the wire harness W / H. Reflect in the memory part of all adapters. That is, all the adapters connected to the LAN have the same storage areas 16a to 16f of the memory unit 16. As a result, the transmission-side ECU 12 only needs to write the transmission data in the storage areas 16a to 16f corresponding to the counterpart ECU to be transmitted.

ＥＣＵ１２が他のＥＣＵからワイヤハーネスＷ／Ｈを介してデータを受信する場合は、下記の動作となる。
例えば、受信側のＥＣＵ１２がＥＣＵ−ａに該当する場合、ＥＣＵ１２は自己に直接接続されたアダプタ１１のメモリ部１６の自己宛ての記憶エリア１６ａの内容を読み込む。これにより、結果的にＥＣＵ−ｂからＥＣＵ−ａにデータが送信されたのと同じことが実現できる。なお、ＥＣＵ１２がメモリ部１６から読み取り作業を行う場合、記憶エリア１６ａ〜１６ｆのうち自己に対応する記憶エリアのみにアクセスし、他のＥＣＵに対応するする記憶エリアにはアクセスしない。 When the ECU 12 receives data from another ECU via the wire harness W / H, the following operation is performed.
For example, when the ECU 12 on the receiving side corresponds to the ECU-a, the ECU 12 reads the contents of the storage area 16a addressed to itself of the memory unit 16 of the adapter 11 directly connected to itself. As a result, it is possible to realize the same result as when data is transmitted from the ECU-b to the ECU-a. In addition, when ECU12 reads from the memory part 16, only the storage area corresponding to self is accessed among the storage areas 16a-16f, and the storage area corresponding to other ECU is not accessed.

以上の構成によれば、ＥＣＵ１２はデータ送受信を行う際にアダプタ１１のメモリ部１６にアクセスすれば足り、伝送路が変わったとしてもＥＣＵ１２を既存のもので共用化できると共に、通信制御をアダプタ１１側に移しているのでＥＣＵ設計負担も軽減される。また、通信制御をアダプタ１１側で処理しているので、ＥＣＵ１２の処理負荷も低減され、伝送路の高速化されてもＥＣＵ１２がボトルネックとなることなく全体として十分なパフォーマンスを発揮することができる。   According to the above configuration, the ECU 12 only needs to access the memory unit 16 of the adapter 11 when performing data transmission / reception. Even if the transmission path is changed, the ECU 12 can be shared with the existing one, and communication control can be performed. The design burden on the ECU is reduced. Further, since communication control is processed on the adapter 11 side, the processing load on the ECU 12 is also reduced, and even if the transmission path is increased in speed, the ECU 12 can exhibit sufficient performance as a whole without becoming a bottleneck. .

図３は第２実施形態を示す。
本実施形態の車載通信システム３０は、アダプタ３１の通信制御基板３２の処理部３３に差分保存部３５を設けている。
差分保存部３５は、ＥＣＵ１２からアダプタ３１のメモリ部１６にデータが書き込まれる
際に、更新されたメモリ領域のアドレス（差分データ）を記憶保持する機能を有している。
メモリ内容送信部３４は、差分保持部３５に記憶された差分データに基づいて、メモリ部１６の各記憶エリア１６ａ〜１６ｆの更新されたデータのみコピーを生成してワイヤハーネスＷ／Ｈに接続された全アダプタに向けて送出する機能を有している。
メモリ内容受信部１８は、他のアダプタから受信したメモリ内容のデータを自己のメモリ部１６の所定のアドレスにコピーして反映させる機能を有している。 FIG. 3 shows a second embodiment.
In the in-vehicle communication system 30 of the present embodiment, a difference storage unit 35 is provided in the processing unit 33 of the communication control board 32 of the adapter 31.
The difference storage unit 35 has a function of storing and holding the address (difference data) of the updated memory area when data is written from the ECU 12 to the memory unit 16 of the adapter 31.
Based on the difference data stored in the difference holding unit 35, the memory content transmission unit 34 generates a copy of only the updated data in the storage areas 16a to 16f of the memory unit 16 and is connected to the wire harness W / H. It has a function to send to all adapters.
The memory content receiving unit 18 has a function of copying and reflecting the data of the memory content received from another adapter to a predetermined address of its own memory unit 16.

次に、車載通信システム３０の動作について説明する。
まず、ＥＣＵ１２からワイヤハーネスＷ／Ｈを介して接続された他のＥＣＵにデータを送信する場合、下記の動作となる。
ＥＣＵ１２の処理部２２のアプリケーション部２４で送信データが生成されると、アダプタ３１のメモリ部１６の送信先ＥＣＵに対応する記憶エリアに当該送信データを書き込む。その際、メモリ部１６内の更新された記憶エリアのアドレスを差分保持部３５で記憶保持しておく。アダプタ３１のメモリ内容送信部３４は、定期的に差分保持部３５に記憶された差分データに基づいて、メモリ部１６の更新されたアドレスのみのデータコピーをワイヤハーネスＷ／Ｈに接続された全アダプタに向けて送出し、全アダプタのメモリ部に反映させる。なお、送信後には、差分保存部３５の内容をクリアしてリセットする。 Next, the operation of the in-vehicle communication system 30 will be described.
First, when data is transmitted from the ECU 12 to another ECU connected via the wire harness W / H, the following operation is performed.
When transmission data is generated by the application unit 24 of the processing unit 22 of the ECU 12, the transmission data is written in a storage area corresponding to the transmission destination ECU of the memory unit 16 of the adapter 31. At that time, the address of the updated storage area in the memory unit 16 is stored and held in the difference holding unit 35. The memory content transmission unit 34 of the adapter 31 periodically copies the data copy of only the updated address of the memory unit 16 to the wire harness W / H based on the difference data stored in the difference holding unit 35. Send to the adapter and reflect in the memory part of all adapters. Note that after transmission, the contents of the difference storage unit 35 are cleared and reset.

以上の構成とすれば、アダプタ３１からワイヤハーネスＷ／Ｈに送出されるデータ量が前回にメモリ内容を送出した時点から更新された差分量だけになるので、通信トラフィックを軽減すること可能になる。なお、他の構成は第１実施形態と同様であるため同一符号を付して説明を省略する。   With the above configuration, since the amount of data sent from the adapter 31 to the wire harness W / H is only the difference amount updated from the time when the memory contents were sent last time, communication traffic can be reduced. . Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

図４および図５は第３実施形態を示す。
本実施形態は、アダプタ４１のメモリ部４２をＥＣＵ４３とのインターフェース側に設けて、ＥＣＵ４３の演算処理用にも利用させている。
即ち、メモリ部４２は、図５に示すように、ＬＡＮに接続された複数のＥＣＵの夫々に対応した記憶エリア４２ａ〜４２ｆに分けてセグメント化されていると共に、ＥＣＵ４３の処理部２２の演算用の記憶エリア４２ｚ（ＣＰＵ処理用ＲＡＭ部）を設けている。
ＥＣＵ４３は、センサ、スイッチあるいはアクチュエータを制御するアプリケーション部２４を有し各種演算制御を行う処理部２２を備え、処理部２２によるアプリケーション実行時のデータ保持を行うメモリとしてアダプタ４１のメモリ部４２を利用している。なお、他の構成は第１実施形態と同様であるため説明を省略する。 4 and 5 show a third embodiment.
In the present embodiment, the memory unit 42 of the adapter 41 is provided on the interface side with the ECU 43 and is also used for arithmetic processing of the ECU 43.
That is, as shown in FIG. 5, the memory unit 42 is divided into storage areas 42 a to 42 f corresponding to a plurality of ECUs connected to the LAN, and is used for calculation by the processing unit 22 of the ECU 43. Storage area 42z (CPU processing RAM section).
The ECU 43 includes an application unit 24 that controls a sensor, a switch, or an actuator, and includes a processing unit 22 that performs various types of arithmetic control, and uses the memory unit 42 of the adapter 41 as a memory that holds data when the processing unit 22 executes an application. is doing. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

本発明の第１実施形態の車載通信用アダプタを示す構成図である。It is a block diagram which shows the adapter for vehicle-mounted communication of 1st Embodiment of this invention. メモリ部を示す図面である。It is drawing which shows a memory part. 第２実施形態を示す図面である。It is drawing which shows 2nd Embodiment. 第３実施形態を示す図面である。It is drawing which shows 3rd Embodiment. メモリ部を示す図面である。It is drawing which shows a memory part.

符号の説明Explanation of symbols

１０ 車載通信システム
１１ 車載通信用アダプタ
１２ ＥＣＵ
１３ アダプタ嵌合部
１４ 通信制御基板（通信制御手段）
１５ 処理部
１６ メモリ部
１７ メモリ内容送信部
１８ メモリ内容受信部 DESCRIPTION OF SYMBOLS 10 In-vehicle communication system 11 In-vehicle communication adapter 12 ECU
13 Adapter fitting part 14 Communication control board (communication control means)
15 Processing Unit 16 Memory Unit 17 Memory Content Transmitting Unit 18 Memory Content Receiving Unit

Claims (1)

車両に配索されるワイヤハーネスの電線をＥＣＵ（電子制御ユニット）に中継接続し、該ＥＣＵが前記ワイヤハーネスを伝送路として通信できるようにした車載通信用アダプタであって、
前記ワイヤハーネスに接続される各ＥＣＵ毎に対応する記憶エリアを夫々区分けして割り当てられたメモリ部と、
前記ＥＣＵが別のＥＣＵにデータを送信する際、自己に直接接続されたアダプタの前記メモリ部の送信先ＥＣＵに対応する記憶エリアに送信データを書き込むと共に、前記メモリ部の前記各記憶エリア部の内容を定期的に前記伝送路に送出して全アダプタのメモリ部にコピーする処理部とを備え、
前記メモリ部がその内容をこれに直接的に接続されたＥＣＵから読み取り可能に構成することにより、ＥＣＵが別のＥＣＵからデータを受信する際、自己に直接的に接続されたメモリ部の自己に割り当てられた記憶エリアを介してデータを受信可能としたことを特徴とする車載通信用アダプタ。 An in-vehicle communication adapter in which an electric wire of a wire harness routed in a vehicle is relay-connected to an ECU (electronic control unit), and the ECU can communicate with the wire harness as a transmission path,
A memory unit allocated to each storage area corresponding to each ECU connected to the wire harness;
When the ECU transmits data to another ECU, the transmission data is written in the storage area corresponding to the transmission destination ECU of the memory unit of the adapter directly connected to the ECU, and each of the storage area units of the memory unit A processing unit that periodically sends the contents to the transmission path and copies them to the memory unit of all adapters;
By configuring the memory unit so that the contents can be read from an ECU directly connected thereto, when the ECU receives data from another ECU, the memory unit directly connected to itself An in-vehicle communication adapter characterized in that data can be received through an allocated storage area.
JP2005173671A 2005-06-14 2005-06-14 In-vehicle communication adapter Expired - Fee Related JP5046353B2 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138837A (en) * 1986-12-01 1988-06-10 Nissan Motor Co Ltd Communication system for on-vehicle controller
JPS63203036A (en) * 1987-02-19 1988-08-22 Nippon Denso Co Ltd Data transfer controller in network
JPH0362648A (en) * 1989-07-31 1991-03-18 Anritsu Corp Rolling system
JPH04297161A (en) * 1991-03-26 1992-10-21 Hitachi Ltd Communication equipment
JPH0730576A (en) * 1993-07-14 1995-01-31 Hitachi Ltd Transmission system
JP2002304382A (en) * 2001-01-31 2002-10-18 Pacific Design Kk Data processing system, data processing equipment and method for controlling it
JP2002325292A (en) * 2001-04-26 2002-11-08 Toshiba Corp Wireless plant input/output system
JP2004254092A (en) * 2003-02-20 2004-09-09 Denso Corp Vehicle-mounted controller

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138837A (en) * 1986-12-01 1988-06-10 Nissan Motor Co Ltd Communication system for on-vehicle controller
JPS63203036A (en) * 1987-02-19 1988-08-22 Nippon Denso Co Ltd Data transfer controller in network
JPH0362648A (en) * 1989-07-31 1991-03-18 Anritsu Corp Rolling system
JPH04297161A (en) * 1991-03-26 1992-10-21 Hitachi Ltd Communication equipment
JPH0730576A (en) * 1993-07-14 1995-01-31 Hitachi Ltd Transmission system
JP2002304382A (en) * 2001-01-31 2002-10-18 Pacific Design Kk Data processing system, data processing equipment and method for controlling it
JP2002325292A (en) * 2001-04-26 2002-11-08 Toshiba Corp Wireless plant input/output system
JP2004254092A (en) * 2003-02-20 2004-09-09 Denso Corp Vehicle-mounted controller

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