深空通信LTP传递时延的理论建模及试验验证

doi:10.16182/j.issn1004731x.joss.201703002

系统仿真学报 ›› 2017, Vol. 29 ›› Issue (3): 479-486.doi: 10.16182/j.issn1004731x.joss.201703002

深空通信LTP传递时延的理论建模及试验验证

王洋, 杨宏, 陈晓光, 丁凯

中国空间技术研究院载人航天总体部,北京 100094

收稿日期:2016-07-04 修回日期:2016-09-12 出版日期:2017-03-08 发布日期:2020-06-02
作者简介:王洋(1984-),女,河北秦皇岛,博士生,研究方向为航天器测控与通信,深空通信网络设计;杨宏(1963-),男,吉林通化,硕士,研究员,博导,研究方向为载人航天器总体设计;陈晓光(1977-),男,江苏无锡,硕士,研究员,研究方向为载人航天器总体设计。

Theoretical Model and Validation of Delivery Time of LTP in Deep Space Communication

Wang Yang, Yang Hong, Chen Xiaoguang, Ding Kai

Institute of Manned Space System Engineering, China Academy of Space Technology, Beijing 100094, China

Received:2016-07-04 Revised:2016-09-12 Online:2017-03-08 Published:2020-06-02

摘要/Abstract

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。

关键词: 延迟容忍网络, 利克里德传输协议, 深空通信网络, 理论模型, DTN仿真平台

Abstract: An accurate theoretical model of LTP in deep space communication was established, taking into account the characteristics of extremely long propagation delay, intermittent connectivity, asymmetric data rates and high error rates. Compared with the theoretical model built before, the model paid more attention to the different impacts of losses of different types of LTP data segments, multiple-session transmission characteristic of LTP, and calculated the expected value of transmission rounds. The performance of theoretical model with different channel BERs and file sizes was simulated and analyzed by MATLAB. A DTN testbed was built and the actual file transfer experiments were carried out to validate the accuracy of the model.

Key words: DTN, LTP, deep space network, theoretical model, DTN testbed

中图分类号:

TP393

王洋, 杨宏, 陈晓光, 丁凯. 深空通信LTP传递时延的理论建模及试验验证[J]. 系统仿真学报, 2017, 29(3): 479-486.

Wang Yang, Yang Hong, Chen Xiaoguang, Ding Kai. Theoretical Model and Validation of Delivery Time of LTP in Deep Space Communication[J]. Journal of System Simulation, 2017, 29(3): 479-486.

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深空通信LTP传递时延的理论建模及试验验证

Theoretical Model and Validation of Delivery Time of LTP in Deep Space Communication

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