基于DSPN的CAN/LIN网络建模及性能分析

Modeling and performance analysis of CAN/LIN network based on DSPN

文章针对广泛应用的CAN/LIN网络,阐述CAN和LIN网络通信机制,采用确定与随机Petri网DSPN对其分别建模,并根据协议规范设定参数,对所建模型仿真实验,获得CAN和LIN网络吞吐量、消息平均传输延迟以及有效消息率等性能指标。结果表明,CAN在其能力范围内可保证高优先级消息的实时性和稳定性,LIN的实时性由消息负荷决定,所得性能参数可为实际应用提供理论指导。

As CAN/LIN network is used widely, DSPN（Deterministic and Stochastic Petri Net） is adopted to model CAN and LIN communication mechanism. The parameters are set according to the protocols, and the performance parameters are shown in the simulation experiment, such as node throughput, average message delay and the probability of available message. The results indicate that CAN ensures the real-time property and stability of high priority messages with its capabilities, and the real-time property of LIN is determined by message load. All these performance parameters are very useful for practical application.