AUTOSAR标准CAN总线故障处理和节点协同策略研究

Research of fault processing and node coordination strategy for CAN bus based on AUTOSAR

为确保车载网络通信的可靠性和稳定性,针对AUTOSAR网络管理规范对节点故障、总线关闭处理以及节点间协同工作的不足,在CAN总线基础上提出了一种处理方法。通过在原状态转换图上增加两种故障处理状态,实现节点故障和总线关闭有效的处理,并在网络管理协议数据单元中添加网络唤醒指示位,实现节点间协同工作。最后给出具体的改进策略,并在实际汽车仪表及CANoe软件构建的平台上进行了测试。测试结果表明,改进的方法具有有效性和可靠性。

For network management based on AUTOSAR,there exist deficiencies in node fault and bus off processing,and inter-node coordination.In order to ensure reliability and stability of vehicle network communication,an improved strategy is proposed for CAN bus.Two fault processing states are added into the original state transition diagram,and the node fault and bus shutdown are effectively processed.Meanwhile,a network wake-up indication bit is added to the Network Management Protocol Data Unit,and then the inter-node coordination operation is implemented.Finally,the specific improvement policy is given,and it is tested on a platform which is constructed by the automotive instrumentation and CANoe software.The test results illustrate the effectiveness and reliability of the proposed strategy.