深空通信中延迟否定确认型CFDP的延时估算

Latency Budget of Deferred Negative Acknowledgement CFDP in Deep Space Communication

根据深空通信的通信环境和长距离传输协议的时延,分析了空间数据系统咨询委员会(CCSDS)高级在轨系统中延迟否定确认信息型文件传输协议(CFDP)的文件传输机理,给出了应用此协议时延时的计算方法。仿真分析了影响延时的误码率、传输速率,以及协议数据单元(PDU)的大小和数量等的影响,获得了典型应用条件下深空通信中对误码率的要求。结果表明:CFDP可在深空探测大延时条件下正确传输文件,满足有效性要求。

According to the communication environment in deep space and time delay of communication protocol in deep space long distance communication,the transmission mechanism of deferred negative acknowledgement CFDP in CCSDS AOS was investigated in this paper.The communication means of the latency was provided using the protocol.The factors affected the latency those were bit error rate,data rate and the size and number of PDU were discussed by simulation.The requirements of bit error rate in deep space communicat...