深空通信LTP传递时延的理论建模及试验验证
发布时间：2018-11-28 17:30
【摘要】：针对深空通信长链路时延、频繁的链路中断及高误比特率特性,对LTP(Licklider Transmission Protocol)传递时延的性能通过数学分析的方法进行了理论建模。该模型相比于以往模型,考虑了不同类型LTP数据段丢失所造成的不同影响,LTP多个会话同时传输的特性,以及采用求期望值的方法来计算传输回合数。同时,对该模型在不同误比特率、不同文件大小下的结果用MATLAB进行了数值仿真分析。构建了深空DTN仿真平台,运行真实的文件传递试验,测试结果逼近理论模型数值分析结果,对理论模型进行了验证。
[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.
【作者单位】： 中国空间技术研究院载人航天总体部;
【分类号】：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.
【作者单位】： 中国空间技术研究院载人航天总体部;
【分类号】：TN927
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