面向深空通信的DTN网络跨层包大小的优化设计

发布时间：2018-05-29 05:37

本文选题：延迟/中断容忍网络 + 束协议/利克里德传输协议栈　；参考：《宇航学报》2017年05期

【摘要】：基于延迟/中断容忍网络中束协议/利克里德传输协议(LTP)栈,提出一种用于深空通信的跨层包大小的优化方案。该方案可以根据信道误比特率、文件大小、信道传播时延和链路数据速率等条件得到最优的束大小、LTP块大小和LTP段大小,最小化深空通信中的文件传递时延。文中针对跨层包大小对文件传递时延的影响进行了分析,并且给出了跨层包大小的优化方案。同时,仿真并分析了信道误比特率、文件大小、信道传播时延和数据速率对最优的LTP段大小的影响以及跨层包大小优化方案所带来的性能增益。理论分析和仿真结果表明,在深空通信环境中,该优化方案可以根据特定的空间任务和环境特性优化跨层包大小,相比于未优化跨层包大小的方案,有效地提高了网络的吞吐量。
[Abstract]:A cross-layer packet size optimization scheme for deep space communication is proposed based on the bundle protocol / Lekrider transport protocol (LTP) stack in delay / interrupt tolerant networks. According to the conditions of channel bit error rate, file size, channel propagation delay and link data rate, the scheme can obtain the optimal beam size and LTP block size, and minimize file transfer delay in deep space communication. In this paper, the effect of cross-layer packet size on file transfer delay is analyzed, and the optimization scheme of cross-layer packet size is given. At the same time, the effects of channel bit error rate, file size, channel propagation delay and data rate on the optimal LTP segment size and the performance gain of the cross-layer packet size optimization scheme are simulated and analyzed. The theoretical analysis and simulation results show that in the deep space communication environment, this optimization scheme can optimize the cross-layer packet size according to the specific space task and environment characteristics, compared with the non-optimized cross-layer packet size scheme. The throughput of the network is improved effectively.
【作者单位】：中国空间技术研究院载人航天总体部;
【基金】：载人航天领域预先研究项目(020401)
【分类号】：TN927

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