摘要
未来的深空通信需要一个鲁棒的、有效与可靠的文件传输协议,在研究CCSDS提出的CFDP协议基础上,针对延迟NAK模式提出了一种新的分析方法。在保证吞吐量的前提下,对ARQ定时器优化设置,导出了平均文件传输时间的理论表达式。在单跳直连链路中,对不同条件下的平均文件传输时间进行了仿真与数值分析。仿真结果表明平均文件传输时间与PDU错误概率、PDU数目及单向传播时间等有密切关系。随机仿真与理论分析具有很好的一致性。
A robust, effective and reliable file delivery protocol is required in the future deep space communication. A new analysis method of deferred NAK mode is proposed, which is based on the CFDP protocol provided by CCSDS. On the premise of ensuring the throughput, the ARQ timer set is optimized and the the- oretical expression for the expected file delivery time is deduced. In the single hop-direct link, the expected file delivery time with different situation is simulated and analyzed. The simulation results show that the ex- pected file delivery time has close relationship with PDU error probability, PDU number and single direction propagation time. The random simulation and theoretical analysis have better consistency.
出处
《航天控制》
CSCD
北大核心
2012年第2期80-83,88,共5页
Aerospace Control
基金
肇庆学院精品课程建设基金资助项目(200916)
关键词
深空通信
CCSDS
CFDP
延迟NAK
平均文件传输时间
Deep space communication
Consultative committee for space data systems
CCSDSfile delivery protocol
Deferred NAK
Expected file delivery time
作者简介
梁迎春（1975-），女，广西玉林人，讲师，硕士，主要研究方向为现代通信及EDA技术。
