无人车载网络高可靠HUB的设计

Design of highly reliable HUB for unmanned vehicle network

为满足无人车技术的不断发展及日趋复杂的车载网络带来的高带宽和高可靠性的使用要求,设计一种车载网络集线器(HUB)。采用时间触发协议(TTP),设计时间触发以太网(TTE)加星型TTP总线的架构。TTE提高数据带宽,在物理层与驱动设备采用点对点的连接方式代替总线型通信方式,提高可靠性,解决总线型通信方式一点断开,整体通信失效的问题。针对HUB的设计做详细阐述,通过实验验证了设计的可行性和可靠性,对车载网络的优化提供了可行的解决途径。

To meet the requirements of high bandwidth and high reliability brought by the continuous development of unmanned vehicle technology and increasingly complex vehicle-borne network,a hub(HUB)for vehicle network was designed.The time-triggered protocol(TTP)was adopted by the design,and the architecture of time-triggered Ethernet(TTE)and star topology TTP bus was designed.The data bandwidth was improved by TTE,and the bus type communication mode was replaced by the driven equipment in the physical layer by the point-to-point connection mode,and the reliability was improved.The bus type communication mode was disconnected at one point,and the problem of overall communication failure was solved.The design of HUB was described in detail,and the feasibility and reliability of the design were verified by experiments.It provides a feasible solution to the optimization of the vehicle network.