一种基于IG-OFF开启网络诊断的替代报文发送方法研究与应用

Research and Application of an Alternative Message Sending Method Based on IG-OFF for Open Network Diagnosis

提出了一种基于IG-OFF开启网络诊断策略的网络替代报文发送方法。在IG-OFF模式下,不带网络管理节点(如发动机控制单元)将直接进行睡眠状态,而一些遵循AUTOSAR简单网络管理规范的ECU(如音响)将继续保持唤醒。按照整车网络诊断IG-OFF下依旧开启网络诊断策略,此时未睡节点将记录已睡节点网络丢失,并存储DTC。为防止误记DTC问题发生,本文详细论述了网关替代报文的发送与停止策略,并在实际开发中予以应用。

A network alternative message sending method based on IG-OFF open network diagnosis strategy is proposed.In IG-OFF mode,without network management nodes(such as the engine control unit),it will go directly to sleep,while some ECUs(such as audio)that follow AUTOSAR's simple network management specification will continue to wake.According to the vehicle network diagnosis IG-OFF,the network diagnosis strategy is still enabled.At this point,the sleeping node will record the network loss of the sleeping node and store the DTC.In order to prevent the DTC problem from happening,this paper discusses in detail the sending and stopping strategy of gateway alternative message and applies it in the actual development.