基于FPGA的无人车网络时间触发交换机设计  

FPGA-based Time-triggered Switch Design for Unmanned Vehicle Networks

作　　者：王东浩 李欣欣[1] 江必铭 WANG Donghao;LI Xinxin;JIANG Biming(School of Mechanical Engineering,Guangxi University)

机构地区：[1]广西大学机械工程学院

出　　处：《仪表技术与传感器》2025年第1期26-31,72,共7页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(22272035);广西人才和基地专项项目(AD19259002)。

摘　　要：无人车载网络兼容时间触发通信业务与事件触发通信业务,由于无人驾驶技术的需求,高清摄像头与各种传感器会产生大量事件触发数据。为避免突发大流量的事件触发对时间触发的确定性产生影响,引起时间触发消息帧传输时延增大、消息传输时延出现抖动,基于FPGA设计了一种双平面时间触发交换机。该交换机通过联合输入交叉节点排队平面与共享存储交换平面分别存储调度时间触发消息帧与事件触发消息帧,通过抢占机制保证时间触发通信的确定性。交换机吞吐量可达950 Mbit/s,时间触发通信延迟抖动在100 ns以内,提高了通信的确定性,并成功应用于无人车网络中。The unmanned vehicle network is compatible with time-triggered communication services and event-triggered communication services.Due to the demand of unmanned technology,high-definition cameras and various sensors generate a large number of event-triggered data streams.In order to avoid the sudden large flow of event-triggered impact on the certainty of time-triggered,causing the time-triggered message frame transmission delay increases and message transmission delay jitter,based on the FPGA,a dual plane time-triggered switch was designed.The switch stored time-triggered message frames and event-triggered message frames through the joint input cross-node queuing plane and the shared storage switching plane,respectively,and the certainty of time-triggered communication through the preemption mechanism was ensured.The throughput of the switch can reach 950 Mbit/s,and the delay jitter of time-triggered communication is within 100 ns,which improves the certainty of communication.And the application of this switch in unmanned vehicle network has certain significance for the development of vehicle network.

关 键 词：FPGA 车载网络 时间触发 交换结构 交换机 模块设计 

分 类 号：TN91[电子电信—通信与信息系统]