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Data communication method and system and gateway applied to in-vehicle network comprising multiple sub-networks

A data communication system and vehicle network technology, applied in the field of data communication methods, systems and gateways of the vehicle network, can solve problems such as driving safety hazards, monitoring and cracking, achieve reliable interaction, improve driving experience, ensure safety and The effect of stability

Inactive Publication Date: 2016-08-24
FAFA AUTOMOBILE (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, messages in plain text are easy to be monitored and cracked, which brings safety hazards to driving

Method used

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  • Data communication method and system and gateway applied to in-vehicle network comprising multiple sub-networks
  • Data communication method and system and gateway applied to in-vehicle network comprising multiple sub-networks
  • Data communication method and system and gateway applied to in-vehicle network comprising multiple sub-networks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Figure 4 It is a flowchart showing a data communication method for a vehicle-mounted network including a plurality of subnets according to Embodiment 1 of the present application. The method can be performed, for example, on a gateway of the vehicle network.

[0036] refer to Figure 4 , in step S410, the first encrypted message sent from the communication device of the first subnet to the second subnet is obtained.

[0037] Specifically, when the communication device of the first subnet needs to perform data communication with the communication device of the second subnet, the communication device of the first subnet will use the pre-stored predetermined security key of the first subnet to encrypt the message data to obtain The first encrypted message, and sending the first encrypted message on the bus. Correspondingly, the gateway of the vehicle network obtains the first encrypted message from the bus. Here, the length of the subnet security key can be 128 bits o...

Embodiment 2

[0055] Figure 5 It is a logical block diagram showing the gateway of the vehicle-mounted network according to Embodiment 2 of the present application. can be used to execute as Figure 4 The method steps of the illustrated embodiment.

[0056] refer to Figure 5 , the gateway of the vehicle network includes a message acquisition module 510 , a message decryption module 520 , a communication protocol conversion module 530 , a message encryption module 540 and a message sending module 550 .

[0057] The packet obtaining module 510 is configured to obtain the first encrypted packet sent from the communication device of the first subnet to the second subnet.

[0058] The message decryption module 520 is configured to use a predetermined first subnet security key to decrypt the first encrypted message to obtain first message data.

[0059] Specifically, the message decryption module 520 may be configured to use a symmetric encryption algorithm to decrypt the first encrypted me...

Embodiment 3

[0070] Figure 6 It is a logical block diagram showing the data communication system of the in-vehicle network according to Embodiment 3 of the present application.

[0071] refer to Figure 6 , the data communication system includes: a plurality of subnets 610 and the gateway 620 of the vehicular network as in the second embodiment above, wherein each of the subnets 610 includes a plurality of communication devices 630 .

[0072] The communication device 630 is configured to receive an encrypted first message from the gateway, decrypt the first message, encrypt a second message sent to the gateway, and send the encrypted second message to the gateway. mentioned gateway.

[0073] The data communication system of the in-vehicle network provided by the embodiment of the present application can be the communication equipment of the two subnets that perform data communication, and automatically and quickly send the message sent by the communication initiator to the gateway and t...

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Abstract

An embodiment of the application provides a data communication method and system and a gateway applied to an in-vehicle network comprising multiple sub-networks. The data communication method applied to the in-vehicle network comprising the multiple sub-networks comprises the following steps: first encrypted message sent to a second sub-network from a communication device of a first sub-network is obtained; the first encrypted message is decoded via a predetermined first sub-network safe secret key, and first message data is obtained; the first message data is converted into second message data that conforms with a second sub-network communication protocol, the second message data is encrypted via a predetermined second sub-network safe secret key, and a second encrypted message is obtained; the second encrypted message is sent to a corresponding communication device in the second sub-network. Via use of the data communication method and system and the gateway applied to the in-vehicle network comprising the multiple sub-networks, messages transmitted among the sub-networks can be sent in forms of cryptographs, and in-vehicle network security can be improved.

Description

technical field [0001] The present application relates to the technical field of vehicular network communication, and in particular to a data communication method, system and gateway for a vehicular network including multiple subnets. Background technique [0002] As we all know, a car is composed of four systems: engine, chassis, body and electrical appliances. Each system includes multiple communication devices, and each communication device has a built-in electronic control unit (Electronic Control Unit, ECU). In terms of usage, ECU is a microcomputer controller for automobiles, also known as a single-chip microcontroller for automobiles. Communication between ECUs is required and relies on a variety of different bus protocols. Therefore, there are a variety of bus protocols inside the car, such as the Controller Area Network (Controller Area Network, CAN) bus protocol, the Local Interconnect Network (Local Interconnect Network, LIN) bus protocol, and the Media Oriented...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06H04L9/06
CPCH04L9/065H04L63/0428H04L67/12H04L63/0464H04L63/062H04L63/068H04L9/14H04L12/66H04L63/06
Inventor 徐勇陈昆盛李文锐邹禹李丹刘鹏林伟
Owner FAFA AUTOMOBILE (CHINA) CO LTD
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