深空通信LTP傳遞時(shí)延的理論建模及試驗(yàn)驗(yàn)證
發(fā)布時(shí)間:2018-11-28 17:30
【摘要】:針對深空通信長鏈路時(shí)延、頻繁的鏈路中斷及高誤比特率特性,對LTP(Licklider Transmission Protocol)傳遞時(shí)延的性能通過數(shù)學(xué)分析的方法進(jìn)行了理論建模。該模型相比于以往模型,考慮了不同類型LTP數(shù)據(jù)段丟失所造成的不同影響,LTP多個(gè)會(huì)話同時(shí)傳輸?shù)奶匦?以及采用求期望值的方法來計(jì)算傳輸回合數(shù)。同時(shí),對該模型在不同誤比特率、不同文件大小下的結(jié)果用MATLAB進(jìn)行了數(shù)值仿真分析。構(gòu)建了深空DTN仿真平臺(tái),運(yùn)行真實(shí)的文件傳遞試驗(yàn),測試結(jié)果逼近理論模型數(shù)值分析結(jié)果,對理論模型進(jìn)行了驗(yàn)證。
[Abstract]:Aiming at the characteristics of long link delay, frequent link interruption and high bit error rate (BER) in deep space communication, the performance of LTP (Licklider Transmission Protocol) transmission delay is modeled by mathematical analysis. Compared with the previous models, the model takes into account the different effects caused by the loss of different types of LTP data segments, the characteristics of simultaneous transmission of multiple LTP sessions, and the calculation of the number of transmission rounds by the method of calculating expected values. At the same time, the results of the model under different bit error rate and file size are simulated by MATLAB. A deep space DTN simulation platform is constructed and the real file transfer experiment is carried out. The test results approach the numerical results of the theoretical model and verify the theoretical model.
【作者單位】: 中國空間技術(shù)研究院載人航天總體部;
【分類號】:TN927
[Abstract]:Aiming at the characteristics of long link delay, frequent link interruption and high bit error rate (BER) in deep space communication, the performance of LTP (Licklider Transmission Protocol) transmission delay is modeled by mathematical analysis. Compared with the previous models, the model takes into account the different effects caused by the loss of different types of LTP data segments, the characteristics of simultaneous transmission of multiple LTP sessions, and the calculation of the number of transmission rounds by the method of calculating expected values. At the same time, the results of the model under different bit error rate and file size are simulated by MATLAB. A deep space DTN simulation platform is constructed and the real file transfer experiment is carried out. The test results approach the numerical results of the theoretical model and verify the theoretical model.
【作者單位】: 中國空間技術(shù)研究院載人航天總體部;
【分類號】:TN927
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