基于带宽利用率的Flexray静态段研究

摘要

In order to improve the bandwidth utilization, this paper took a research about the time distribution. It put forwardrna method that the long static frame would be divided into multiple frames with fixed length, and this method took extra load ofrndivision and frameID into consideration. It took a research about the relationship between the message length, frameID and thernbandwidth utilization. The experiments strongly show that the method can get a better bandwidth utilization with a fewerrnframeID.%为了提高Flexray网络静态段带宽利用率,对消息时隙的分配问题进行了研究.针对消息长度相差很大而导致带宽浪费的情况,提出了将静态段的部分较长的消息分割成多个固定长度的消息时隙分配方法.该方法考虑消息分割后增加的无效比特位对带宽利用率的影响和增加的帧ID个数对整个网络的影响,研究了消息长度、帧ID数目与带宽利用率的关系.数值实验表明,该方法可以在使用较少帧ID的情况下提高带宽利用率.