In-vehicle communication system and in-vehicle communication method

Patent metadata

Field	Value
Publication number	US-9925935-B2
Application number	US-201214419356-A
Country	US
Kind code	B2
Filing date	Aug 24, 2012
Priority date	Aug 24, 2012
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

An increase in the number of signal lines of a control apparatus for controlling devices of an automobile can be prevented and safety of the automobile can be secured. An in-vehicle communication system includes an input DHM that obtains device data from an input device, a BCM that generates control data for controlling an output device based on a value of the device data, and an output DHM that controls the output device according to the control data. The input DHM is composed of duplexed input control blocks, duplexed input shared memories, and an input NW control block. The BCM is composed of a BCM_NW control block, duplexed BCM shared memories for different intended uses, and duplexed arithmetic blocks. The output DHM is composed of an output NW control block, duplexed output shared memories, duplexed output control blocks, and a matching circuit.

First claim

The invention claimed is:

1. An in-vehicle communication system comprising:
an input transmission apparatus including
a first device data input part that obtains, as first device data, data outputted from a device being installed in a vehicle;
a second device data input part that obtains, as second device data, the data; and
an input transmission part that transmits first input transmission data, including the first device data and first input safety communication data, and second input transmission data, including the second device data and second input safety communication data;

a control apparatus including
a first control determination part that determines whether communication of the first device data has been performed properly, using the first input safety communication data included in the first input transmission data;
a first control arithmetic part that, when the communication of the first device data has been performed properly, generates first control data by specifying control based on the first device data;
a second control determination part that determines whether communication of the second device data has been performed properly, using the second input safety communication data included in the second input transmission data;
a second control arithmetic part that, when the communication of the second device data has been performed properly, generates second control data by specifying control based on the second device data; and
a control transmission part that transmits first control transmission data including the first control data, and second control transmission data including the second control data; and

an output transmission apparatus including
an output receiving part that receives the first control transmission data and the second control transmission data; and
a device control data output part that outputs device control data for controlling a device to be controlled which is installed in the vehicle, based on the first control data and the second control data.

2. The in-vehicle communication system according to claim 1 ,
wherein the control apparatus includes
a control receiving part that receives the first input transmission data and the second input transmission data,
wherein when the communication of the first device data has not been performed properly, the first control arithmetic part generates the first control data by specifying fail-safe control,
wherein when the communication of the second device data has not been performed properly, the second control arithmetic part generates the second control data by specifying the fail-safe control,
wherein the first control transmission data includes the first control data and first control safety communication data,
wherein the second control transmission data includes the second control data and second control safety communication data,
wherein the device control data output part of the output transmission apparatus includes
a first output determination part that determines whether communication of the first control data has been performed properly, based on the first control safety communication data;
a first output arithmetic part that, when the communication of the first control data has been performed properly, outputs first output data by specifying the first control data, and when the communication of the first control data has not been performed properly, outputs first output data by specifying fail-safe control,
a second output determination part that determines whether communication of the second control data has been performed properly, based on the second control safety communication data;
a second output arithmetic part that, when the communication of the second control data has been performed properly, outputs second output data by specifying the second control data, and when the communication of the second control data has not been performed properly, outputs second output data by specifying the fail-safe control; and
a matching output part that outputs the device control data based on the first output data and the second output data.

3. The in-vehicle communication system according to claim 2 ,
wherein when at least either one of the first output data and the second output data is data to specify the fail-safe control, the matching output part outputs the data to specify the fail-safe control as the device control data.

4. The in-vehicle communication system according to claim 1 ,
wherein upon being determined that communication of the first input transmission data has not been performed properly, the first control determination part outputs communication failure data to notify that a failure has occurred, and
wherein, upon being determined that communication of the second input transmission data has not been performed properly, the second control determination part outputs the communication failure data.

5. The in-vehicle communication system according to claim 1 ,
wherein the input transmission apparatus includes a first input memory and a second input memory,
wherein the first device data input part writes in the first input memory the first device data obtained,
wherein the second device data input part writes in the second input memory the second device data obtained, and
wherein the input transmission part reads the first device data from the first input memory; transmits data including the first device data read, as the first input transmission data; reads the second device data from the second input memory; and transmits data including the second device data read, as the second input transmission data.

6. The in-vehicle communication system according to claim 1 ,
wherein the control apparatus includes a first receiving memory in which the first input transmission data is written, and a second receiving memory in which the second input transmission data is written,
wherein the first control determination part reads the first input transmission data from the first receiving memory, and based on the first input transmission data read, determines whether communication of the first input transmission data has been performed properly, and
wherein the second control determination part reads the second input transmission data from the second receiving memory, and based on the second input transmission data read, determines whether communication of the second input transmission data has been performed properly.

7. The in-vehicle communication system according to claim 1 ,
wherein the control apparatus includes a first transmission memory and a second transmission memory,
wherein the first control arithmetic part writes in the first transmission memory the first control data generated,
wherein the second control arithmetic part writes in the second transmission memory the second control data generated, and
wherein the control transmission part reads the first control data from the first transmission memory; transmits data including the first control data read, as the first control transmission data; reads the second control data from the second transmission memory; and transmits data including the second control data read, as the second control transmission data.

8. The in-vehicle communication system according to claim 1 ,
wherein the output transmission apparatus includes a first output memory and a second output memory,
wherein the output receiving part writes in the first output memory the first control transmission data received, and writes in the second output memory the second control transmission data received, and
wherein the device control data output part reads the first control transmission data from the first output memory, reads the second control transmission data from the second output memor

Assignees

• Nishiyama Hirohito
• Ito Masuo
• Morita Keisuke
• Tokunaga Yuichi
• Tanimoto Daisuke
• Okamura Shigekazu
• Tsuji Hiroyuki
• Mimura Mitsuhiro
• Mitsubishi Electric Corp

Inventors

• Nishiyama Hirohito
• Ito Masuo
• Morita Keisuke
• Tokunaga Yuichi
• Tanimoto Daisuke
• Okamura Shigekazu
• Tsuji Hiroyuki
• Mimura Mitsuhiro

Classifications

• G06F13/4221

  being an input/output bus, e.g. ISA bus, EISA bus, PCI bus, SCSI bus · CPC title

• H04L67/12 Primary

  specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks · CPC title

• B60R16/023 Primary

  for transmission of signals between vehicle parts or subsystems · CPC title