Statistical Analysis of Improved Bit-stuffing Method Based on CAN Bus

Abstract

The stuffing bit of the CAN bus is closely related to the transmission performance of the bus system. Therefore, it is very important to reduce the stuffing bit to improve the performance of the bus. In this paper the stuffing mechanism of CAN bus was analyzed, and the XOR stuffing method proposed by previous researchers was drew on, then the necessary correction was made to improve the XOR stuffing method to reduce the stuffing bit more reasonably. Through the modeling and analysis about the improved XOR method, it is found that the stuffing bit based on improved XOR stuffing method is a random variable, and the probability distribution maps of stuffing bit were obtained through programming simulation. Combined with the simulation probability distribution curves and related formulas, we deduced the statistical characteristics of the stuffing bit with the improved XOR stuffing method, which will provide a reasonable theoretical basis for further research and analysis of CAN bus system.