SAE AS6802协议研究及模块化仿真平台设计

分析安全关键领域的时间触发网络协议SAE AS6802与时间同步算法技术,分别对同步流程、时间同步角色、时序保持算法、集中控制算法、时钟纠正算法、同/异步派系检测算法以及通道择优方法等进行研究,归纳时间同步精度的影响因素。在此基础上,设计一种时间同步算法IP核,并构建基于SystemVerilog的模块化仿真验证平台。利用该平台对时间同步算法进行RTL级仿真,结果验证了该时间同步算法的正确性,其同步精度保持在亚微秒级,满足下一代高安全关键领域的应用要求。

SAE AS6802 Protocol Research and Modular Simulation Platform Design

The paper analyzes the Time-Triggered Ethernet(TTE)protocol SAE AS6802 and the time synchronization algorithm,which are used in safety-critical systems.The research focuses on the synchronization control flow,time synchronization component,time series preservation algorithm,centralized control algorithm,clock correction algorithm,synchronous/asynchronous clique detection algorithm,and optimal channel selection method.The factors that influence the synchronization precision are summarized.On this basis,this paper proposes an IP core for the time synchronization algorithm,and describes the construction of a modular simulation platform based on SystemVerilog.The platform is used for RTL-level simulation of the synchronization algorithm.Experimental results verify the correctness of the synchronization algorithm,and show that the synchronization precision is within microseconds,which meets the requirements of the next-generation safety-critical applications.