中国空间科学技术

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CCSDS下行链路虚拟信道调度方法及其性能分析

顾莹琦,谭维炽   

  1. 北京空间飞行器总体设计部!北京100086,北京空间飞行器总体设计部!北京100086
  • 发布日期:2001-06-25

CCSDS Downlink Virtual Channel Schedule and Performance Analysis

Gu Yingqi Tan Weichi (Beijing Institute of Spacecraft System Engineering,Beijing 100086)   

  • Published:2001-06-25

摘要： 描述了分包遥测的信源特点 ,并在此基础上提出了传送层虚拟信道划分和使用原则 ;利用轮询系统的方法建立了虚拟信道调度模型 ,从系统延时性能和缓存分配原则的角度 ,分析了不同信源组合下不同调度策略对系统可能造成的性能影响 ;提出了不同信源条件下适宜的调度策略和缓存分配策略。结果可为系统早期设计提供参考

关键词: 信道, 下行链路, 轮询系统, 性能分析

Abstract: The characteristics of multiple application processes onboard in packet telemetry system are represented.The distribution and the utilization of transfer layer virtual channels are suggested and the schedule model is developed by using polling systems.System performance is evaluated by average delay,maximum delay and buffer usage resulted from different schedules under the condition of different combinations of data sources.Appropriate strategies for various data source conditions are also suggested.The results would be useful in the initial design of data system onboard.