摘要
为保证卫星通信所需的时钟同步精度,并提高同步机制的容错能力,将时间触发以太网中具有强容错机制的SAE AS6802同步协议应用于卫星网络时钟同步中。对AS6802协议的同步原理进行理论分析,构建基于AS6802的卫星无线组网时钟同步仿真模型,在OMNeT++平台上实施仿真模拟并分析。结果表明:将AS6802同步技术应用到卫星网络通信中能够获得较高的时钟同步精度,在星间距离为50 km且卫星数量较少的情况下,同步精度可达到0.1 ms以下。
To ensure the clock synchronization accuracy required by satellite communication and to improve the fault tolerance of the synchronization mechanism,the time-triggered Ethernet SAE AS6802 synchronization protocol with strong fault tolerance mechanism was applied to the satellite network clock synchronization.The synchronization principle of AS6802 protocol was analyzed theo-retically,and the clock synchronization simulation model of satellite wireless networking based on AS6802 was constructed.The simulation and analysis were carried out on the OMNeT++platform.The simulation results showed that applying AS6802 synchronization technology to satellite network communication could obtain higher clock synchronization accuracy.When the inter-satellite distance was 50 km,the number of satellites was small,and the synchronization accuracy could reach less than 0.1 ms.
作者
宫经刚
刘建华
宁宇
张德明
何锋
GONG Jinggang;LIU Jianhua;NING Yu;ZHANG Deming;HE Feng(Beijing Institute of Control Engineering,Beijing 100190,China;School of Electronic Information Engineering,Beihang University,Beijing 100191,China)
出处
《载人航天》
CSCD
北大核心
2021年第5期626-632,共7页
Manned Spaceflight
基金
航天系统部预研基金(30504040306)。
关键词
卫星通信
时钟同步
无线网络
时间触发
satellite communications
clock synchronization
wireless network
time-triggered
