| CFDP协议中延迟NAK文件传输时间分析与仿真 |
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| 引用本文： | 梁迎春.CFDP协议中延迟NAK文件传输时间分析与仿真[J].航天控制,2012,30(2):80-83,88. |
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| 作者姓名： | 梁迎春 |
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| 作者单位： | 肇庆学院电子信息与机电工程学院,广东肇庆,526061 |
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| 基金项目： | 肇庆学院精品课程建设基金资助项目 |
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| 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。
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| 关 键 词： | 深空通信 CCSDS CFDP 延迟NAK 平均文件传输时间 |
The Analysis and Simulation on File Delivery Time of Deferred NAK in CFDP Protocol |
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| LIANG Yingchun.The Analysis and Simulation on File Delivery Time of Deferred NAK in CFDP Protocol[J].Aerospace Control,2012,30(2):80-83,88. |
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| Authors: | LIANG Yingchun |
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| Institution: | LIANG Yingchun Faculty of Electronic Information & Mechanical Electrical Engineering,Zhaoqing University,Zhaoqing,Guangdong 526061,China |
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| Abstract: | 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 theoretical 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 expected 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. |
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| Keywords: | Deep space communication Consultative committee for space data systems CCSDS file delivery protocol Deferred NAK Expected file delivery time |
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