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A CAN bus safety communication method in an intelligent lighting control system

An intelligent lighting control, CAN bus technology, applied in energy-saving control technology, lighting devices, transmission systems, etc., can solve the problem of inability to communicate with CAN bus devices, and achieve the effect of safe CAN bus data communication

Active Publication Date: 2016-08-10
中船凌久高科(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the CAN protocol has become a standard, modifying the protocol will not be able to communicate with other system CAN bus devices

Method used

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  • A CAN bus safety communication method in an intelligent lighting control system
  • A CAN bus safety communication method in an intelligent lighting control system
  • A CAN bus safety communication method in an intelligent lighting control system

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Experimental program
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specific Embodiment approach

[0028] Step 1: The CAN node initializes the authentication table, records the address and communication authentication ID of other CAN nodes, and indicates the authentication relationship between this node and other nodes. The initial node address is empty, the authentication ID is 0, and it is not authenticated with other nodes by default. Each CAN node is assigned an initial key of 8 bytes. Each CAN node stores an 8-byte dynamic key, and the initial value is the initial key.

[0029] Step 2: CAN node 1 (initiator) assembles the authentication request packet. Authentication request packet structure: ID.27-ID.24 of the frame header 29bit is the version number and command type message; ID.23-ID.20 is the CAN node 1 (initiator) function type; ID.19-ID.16 ID.15-ID.08 is the address of CAN node 1 (initiator); ID.07-ID.00 is the address of CAN node 2 (receiver). The effective data length of the data header is 0, which is the data length of the authentication request, and the com...

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Abstract

The invention provides a CAN (Controller Area Network) bus safety communication method in an intelligent illumination control system. The adopted method comprises the following steps that CAN bus application protocols in an application layer which is not defined in detail by a CAN bus protocol are defined, and comprise a CAN bus safety communication framework structure, a CAN bus safety communication data structure, a CAN bus data encryption method and CAN bus communication authentication flow definition. The CAN bus safety communication method disclosed by the invention has the advantages that the application protocols are defined in the application layer which is not defined in detail by the CAN bus protocol and comprise a message structure, a data encryption algorithm, an authentication time sequence and an interaction time sequence; and a data link layer CAN data frame is defined to realize priority definition of data and realize rapid, real-time and safe data communication.

Description

technical field [0001] The invention relates to the technical field of field bus communication, in particular to a CAN bus safety communication method in an intelligent lighting control system. Background technique [0002] Fieldbus CAN (Controller Area Network) is the abbreviation of Controller Area Network. It is a communication network connecting field devices and automation systems. It has the characteristics of full digital signal transmission, decentralized and open control functions. Compared with other field buses, it has the advantages of high reliability and low price, so it has been widely used. [0003] CAN bus plays an important role in the intelligent lighting control system. It provides an open communication platform for intelligent devices such as the underlying illuminance collection equipment and lighting loop control equipment, ensuring real-time data exchange between devices. [0004] The nature of open interconnection brings unsafe factors to the CAN bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40H04L29/06H05B37/02
CPCY02B20/40
Inventor 焦红爱刘媛陆德波皮文博夏静
Owner 中船凌久高科(武汉)有限公司