一种改进的AUTOSAR车载网络管理方法

Improved method of AUTOSAR in-vehicle network management

网络管理是保证车载网络可靠运输的关键,针对AUTOSAR网络管理对节点故障和总线故障处理的不足,提出了一种改进的AUTOSAR网络管理方法。通过在NMPDU(网络管理协议数据单元)中增加一个睡眠标志位,并在节点进入READY SLEEP状态后重复发送带有睡眠标志位的网络管理消息,以实现节点的故障检测;通过在原有的网络管理状态转换图的基础上增加了LIMPHOME状态,当节点不能正常使用总线时进入该状态,以实现总线故障的处理。最后利用CANoe软件进行仿真,验证该方法的可行性。

The key of network management is to ensure the reliable transmission of the vehicle network. Aiming at the deficiency of the AUTOSAR network management to node failures and bus error handling, an improved method of AUTOSAR network management is proposed. The node failure detection is achieved by adding a sleep flag in NMPDU （network management protocol data unit） and repeatedly transmitting the network management message with sleep flag after the node enters READY SLEEP state. And the bus fault handling is achieved by adding a LIM- PHOME state on the basis of the original state transition diagram of network management and entering the state when the node can not properly use the bus because of bus fault. Finally, CANoe simulation software is used to verify the feasibility of the method.