【摘要】 为确定空间数据咨询委员会(CCSDS)建议高级在轨系统中CCSDS文件传输协议(CFDP)在深空通信环境中的适应性,研究了CFDP中提示否定确认型文件传输协议(Prompt NAK CFDP)的传输机理。给出了此传输方式的文件传输时延估算方法。分析了误码率、传输速率、协议数据单元的大小与数量,以及提示信息数等对传输时延的影响,获得了深空通信对误码率的要求。研究表明:CFDP可用于深空通信,为其进一步应用和改进提供了参考。更多还原

【Abstract】 To adapt the condition of file delivery protocol of consultative committee for space data systems(CFDP) in advanced orbit system(AOS) suggested by CCSDS in deep space communication,the transmission mechanism of prompt negative acknowledgement CFDP in CCSDS AOS was investigated.The means of the latency of the transmission was provided.The effects of the bit error rate,data rate, the size and number of protocol data unit,and number of prompt on the latency were analyzed.The requirement of the bit error rate for the deep space transmission was integrated.The results showed that CFDP could be applied to deep space transmission,which provided a reference for the application and improvement of CFDP.更多还原