摘要
分析了TTP总线时间同步机制和基于中断方式的端到端数据传输模式,以及节点间时间同步、端到端时延和抖动等参数,设计了同步精度和时延测试方法,构建测试原型系统和配置场景并开发测试用例。结果表明,各节点间的时间偏差小于总线配置场景所允许的同步精度上限5us,端到端时延263.30～267.43us。因时间槽设置为250us,可知主机应用层与总线控制器同步方式下数据传输的端到端时延主要取决于时间槽所占时间。此测试方法和所用的原型系统可用于TTP总线通信系统设计和部署的优化。
The ttp bus time synchronization mechanism and the end-to-end data transmission mode based on the interrupt mode,as well as the time synchronization, end-to-end delay and jitter parameters between nodes are analyzed. The synchronization precision and delay test method are designed to build the test prototype system, and configure the scenario and develop test cases.The results show that the time deviation between nodes is less than the upper limit of 5us allowed by the bus configuration scenario, and the end-to-end delay between nodes is 263.30~267.43us.Since the time slot is set to 250us, it can be seen that the endto-end delay of data transmission in the synchronous mode of the host application layer and the bus controller mainly depends on the time span occupied by the time slot. This test method and the prototype systemused can beused to optimize the design and deployment of the ttp bus communication system.
作者
于峰
刘智武
陈长胜
YU Feng;Liu Zhi-wu;CHEN Chang-sheng(Xi’an Aeronautical Computing Technique Research Institute,AVIC,Xi’an 710065,China)
出处
《信息通信》
2019年第2期159-161,共3页
Information & Communications
基金
国家重点基金项目(MJ-2014-S-41)
关键词
时间触发总线
同步精度
端到端时延
抖动
Time-Triggered bus
synchronization precision
end-to-end delay
jitter
