Research And Realization Of Dynamic Scheduling Mechanism In Automobile CAN Network

For short data、fast speed and low cost, CAN-bus has become the mainstream of thevehicle network. It is the real-time transmission of CAN that could be one of the keyproblemsas regards network communication security of automobile. Therefore, for theestablishment of a reliable automobile network system, research on scheduling methodof messages,its design and application, has an important significance.This paper is supported by National Nature Science Fund and focuses on thedynamic CAN network scheduling mechanism based on EDF and its implementationon FPGA. The judgments of schedulability of CAN network message set is fullydemonstratedand the influence of quantization errorson itis analyzed. Toaccomplish it,FPGA Technology which has the high-speed parallel processingand rich logic resources is adopted.The dynamic scheduling mechanism of theCAN network is streamlined.To verify the feasibility of the design of FPGAand the optimization function of message scheduling, asemi physical simulationsystem is built on CANoeplatform.This issue makes a useful attempt toestablish an automobile CAN network system with high reliability and realtime performance.