中文摘要：

OSEK网络管理（network management,NM）中定时器取值影响NM系统的性能.分析OSEK NM运行机制与定时器之间的关系,提出了影响定时器取值的3个指标因素：NM不会误判节点离线、NM的实时性以及NM消息的总线利用率.通过时间分析模型定量地描述这些因素和定时器取值的约束关系;在此基础上,给出能够同时满足上述3个指标约束的定时器取值的计算方法.最后在CANoe平台上进行了基于CAN总线的NM仿真,实验结果表明了本文方法的有效性和可行性.

英文摘要：

The performance of OSEK NM （network management） system is affected by the values of timers in OS- EK NM. Through analyzing the relationship between the operation mechanism of OSEK NM and timers, three index factors influencing the values of timers are put forward： NM wont misjudge nodes to drop line, NM real-time performanee and bus utilization of NM messages. The constraints between these factors and the values of timers are quantitatively researched by setting time analysis model ; The method calculating values of timers which can guaran- tee to meet the requirement of above index factors is given on the analysis. Experimental results of NM system simulation on CAN bus conducted in CANoe platform show the efficiency and feasibility of this method.