面向高级在轨系统的动态服务质量保证方法研究

AOS(Advanced Orbiting System,高级在轨系统)已经逐渐被各国空间组织采用,随着空间任务的发展趋势更多样化和复杂化,对AOS的QoS(Quality of Service,服务质量)也提出了更高要求.针对AOS服务质量的提升需求,提出了一种虚拟信道优先级策略,使用大容量缓存结合数据压缩动态策略和遥测数据抽帧策略相结合的QoS保证方法,通过分析返向链路带宽与航天器遥测用户带宽的裕量,可以动态调整QoS保证,以适应不同应用环境下的航天器AOS的QoS保证需求.通过模拟不同的工况进行仿真试验,结果表明,该AOS服务质量保证方法适用于返向链路带宽裕量充足和不足的工况,比传统的全同步策略和同步异步结合策略拥有更广泛的适应范围.

A Dynamic QoS Assurance Method for AOS

While CCSDS (Consultative Committee for Space Data Systems) AOS (Advanced Orbiting System) protocol is widely adopted by space organizations in the world, higher requirements are being put on its QoS (Quality of Service) with increasing diversity and complexity of space missions. To meet the requirements, a QoS guarantee method including virtual channel priority algorithm, large capacity combined with data compression and telemetry frame sampling is proposed. By comparing the downlink bandwidth with the amount of data to be transferred, the QoS guarantee method is adjusted dynamically to meet different scenes. The QoS assurance method is implemented in simulation under different scenes. The results show that the QoS assurance method works both in bandwidth short and bandwidth sufficient instances, and it is more adaptive than the traditional synchronous mode and the synchronous and asynchronous mode