Optimization analysis of message data processing based on CAN bus
LIU Xuhong
Abstract：In view of the problems of complex parameter configuration and poor software upgrade adaptability in the traditional development mode of request-response type messages based on controller area network(CAN)bus J1939 protocol,the composition and attributes of five types of message formats are combined with different protocol data unit(PDU)formats,parameter group number(PGN)request message transmission modes corresponding data response and transmission protocol connection management of broadcast announcement message(BAM),request to send(RTS)messages,clear to send(CTS)messages,end of message acknowledgment(EMA)messages and connection abort(CA)messages.The message data processing procedure is optimized,and four data transmission types,namely single packet response to a specific request message in PDU1 format,global single packet response to a specific request message in PDU2 format,multi-packet to a request message in a specific request connection mode in PDU1 format,multi-packet response to a global request broadcast announcement message in PDU2 format,are used for verification.The results show that the processing procedure of the request-response type message after optimizing the data transmission is more flexible in message data configuration,with less calibration parameters,simplified upgrade process,flexible PGN request message recognition and improved adaptive response capability.
Keywords：CAN busJ1939transport protocoladaptive capabilityrequest and response message
Publication Date：2025-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 76-83 )