汽车FlexRay网络的单节点容错同步算法

The Single-Node Fault-Tolerant Synchronization Algorithm of Car FlexRay Network

为了保证网络的安全性和可靠性,FlexRay协议要求网络中同步节点数目不能小于3个,这种制约限制了FlexRay协议在网络中节点数目较少情形下的应用。针对这种情况,本文提出了一种FlexRay总线单节点容错同步算法,该算法利用一个同步节点即可实现FlexRay的时钟同步,还能减少FlexRay时间测量的步骤和计算量。经实例验证,该算法可以在保证网络安全性和可靠性的前提下实现时钟同步。

In order to ensure FlexRay network security and reliability, clock synchronization can not process if the number of synchronization nodes is less than three. The limitation has greatly restricted the network performance when the number of nodes is not too many. To solve this problem, the single-node fault-tolerant synchronization algorithm of FlexRay which can achieve clock synchronization with only one synchronization node is proposed. It can simplify the process of time measurement and calculation. Finally the example shows that the algorithm can not only achieve clock synchronization, but also ensure network security and reliability.