【作者】 李旭； 张钦宇； 李晖； 许洪光；

【Author】 LI Xu ZHANG Qin-yu LI Hui XU Hong-guang (Shenzhen graduate school of Harbin Institute of Technology,Shenzhen,518055)

【机构】 哈尔滨工业大学深圳研究生院；

【摘要】 为了确定CCSDS建议高级在轨系统中CFDP协议在深空通信环境下的适应性,研究了CFDP中四种可靠文件传输协议的传输机理,分别给出了这四种CFDP协议文件传输时延的估算方法及仿真结果。分析了误码率、传输速率、协议数据单元的大小和数量,外部触发事件的触发频率等因素对传输时延的影响,并对它们进行了比较,得到了深空通信中典型应用条件下对误码率的要求,给出了深空通信中四种类型CFDP协议的选取原则,为它在深空通信中的进一步应用和改进提供了参考。更多还原

【Abstract】 To adapt the condition of communication in deep space and choose the appropriate protocol,the transmission mechanism of the four kinds of CFDP reliable services in CCSDS AOS were investigated.Also, the means of the latency were provided when using the protocol.Some factors which affect the latency,such as bit error rate,data rate,the size and number of PDU,the trigger frequency of external event trigger and so on, were described.With the calculation of the BER for the demand in deep space communication,the selection regulation of CFDP was proposed.Meanwhile,the regulation also takes the reference for the further applications in deep space communication.更多还原