中文摘要：

OSEK网络管理（NM）机制保障了汽车网络安全可靠的运行，同时也降低了有关网络实时性，如何引入OSEKNM机制并提高汽车网络的实时性至关重要。从提高汽车网络实时性出发，通过分析有关刚络的实时性，改进OSEKNM中节点加入退出机制，并通过软件仿真证明了改进后的机制提高了汽车网络的实时性。

英文摘要：

OSEK network management （NM） mechanism ensures the vehicle network to work safety and reliability, meanwhile reduces the real-time of network. How to improve the real-time of the vehicle network willl the introduction of OSEK NM is very important. In order to improve the vehicle network real-time, this paper perfect the OSEK NM mecha- nism of nodes participate and drop out by the analysis of relewmt network real-time pertimnance, and the improved vehicle network real-time of the improved mechanism can be proved by software simulation.