时间同步技术与调度机制的研究

Research on time synchronization technology and scheduling mechanism

时间触发以太网TTE以其高带宽、高可靠性、高实时性、高兼容性并满足未来航电系统的低重量、高可靠、易测试、低费效比、快速研发等特性而广受国内航天院所的重视。其关键是时间同步技术和TDMA调度机制,时间同步机制提供占用资源少、易实现、高可靠的时钟同步,调度机制提供无冲突、高效的调度表。通过对时间同步技术和调度技术的原理进行分析,提出时间同步和调度的实现方法并指出相关的影响因素和未来的发展方向。

TTEthernet possesses high bandwidth, high reliability, high real-time performance, high compatibility meet the demand of future avionics applications of low weight, high reliability, easy testing, low cost-effectiveness, rapid development. As a result, it has been widely recognized by the domestic space institute. The key of TTEthernet is time synchronization technology and schedul- ing mechanism. The time synchronization mechanism provides a clock synchronization method with less resource consumption, easy implementation and high reliability. The scheduling provides efficient, conflict free schedule .This paper analyzed the principle of time synchronization and scheduling technology and proposed the realized method and pointed out the influencing factors and devel- opment direction.