Modeling the RTT of bundle protocol over asymmetric deep-space channels

Modeling the RTT of bundle protocol over asymmetric deep-space channels
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对非对称深空信道上捆绑协议的 RTT 进行建模

DOI:
10.1007/bf03391574
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发表时间:
2016-10
期刊:
Journal of Communications and Information Networks
影响因子:
--
通讯作者:
Dongming BIAN
Dongming BIAN
中科院分区:
其他
文献类型:
--
作者:
Zhengguo BIAN;Gengxin ZHANG;Dongming BIAN

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延迟/中断容忍网络通信严重依赖BP(捆绑协议),该协议使用众所周知的存储转发方法和可选的托管传输来应对压力较大的通信环境。BP的使用及其在深空通信中的性能一直是争论的主题。文件传递延迟的准确估计(即,RTT(Round Trip Time,往返时间)对于协议的有效传输控制、可靠传输和带宽使用优化是必不可少的。在本文中,我们提出了一个性能分析的BP运行在UDPCL/UDP在深空信道上,侧重于RTT估计,在存在高度不对称的信道速率。分析模型建立的RTT估计的BP/UDPCL传输的空间信道速率不对称性,并考虑到造成的延迟的影响,信道损伤。使用基于PC的测试平台的文件传输实验验证了该模型。发现较小的束大小(如果小于所计算的阈值)导致监管确认传输中的较长延迟,并且因此导致较长的RTT。
Delay/disruption-tolerant networking communications rely heavily on BP (Bundle Protocol), which uses the well- known approach of store-and-forward with optional custody transfer to deal with stressed communication environments. The use of BP and its performance in deep-space communication has been the subject of debate. The accurate estimate of file delivery latency (i.e., RTT (Round Trip Time)) is essential for efficient transmission control, reliable delivery, and bandwidth usage optimization of a protocol. In this paper, we present a performance analysis of BP running over UDPCL/UDP over deep- space channels, focusing on the RTT estimate, in the presence of highly asymmetric channel rates. Analytical models are built for the RTT estimate of the BP/UDPCL transmissions considering the effect of delay caused by space channel-rate asymmetry, and, channel impairment. The models are validated by file transfer experiments using a PC-based testbed. It is found that a smaller bundle size (if smaller than a calculated threshold) results in a longer delay in custody acknowledgment transmission, and thus, a longer RTT.
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