Acknowledgment Mechanisms for Reliable File Transfer Over Highly Asymmetric Deep-Space Channels
Acknowledgment Mechanisms for Reliable File Transfer Over Highly Asymmetric Deep-Space Channels
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DOI：
10.1109/maes.2022.3192508
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发表时间：
2022-09
影响因子：
3.6
通讯作者：
Lei Yang;Ruhai Wang;Jie Liang;Yu Zhou;Kanglian Zhao;Xingya Liu
中科院分区：
文献类型：
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作者：
Lei Yang;Ruhai Wang;Jie Liang;Yu Zhou;Kanglian Zhao;Xingya Liu
深空网络信道的特征“部分”在于非对称信道速率。非对称信道速率的影响是慢确认（ACK）信道不能有效地支持在数据接收机处生成的ACK段的传输。增加数据块大小和延长重传超时（RTO）定时器是广泛使用的传输机制，用于消除高度信道速率不对称的影响。为了解决深空网络中信道速率不对称的影响，最近提出了聚合监管信号（ACS）。在这篇文章中，这三种确认机制进行了研究，重点是他们的有效性评估的高度非对称的深空网络信道伴随着数据丢失的比较。该研究是通过现实的文件传输通过实验测试平台的基础设施进行。研究发现，ACS机制表现出显着的性能优势，其他两种机制的“归一化”的有效吞吐量和总数据量在成功的文件传输。特别是，ACS机制使其成为在不增加RTO定时器长度的情况下操作小数据束的更好选择。
Deep-space network channels are characterized “in part” by asymmetric channel rates. The effect of the asymmetric channel rates is that the slow acknowledgement (ACK) channel cannot effectively support transmission of the ACK segments generated at the data receiver. Increment of data block size and extension of the retransmission timeout (RTO) timer are widely used transmission mechanisms for eliminating the effect of highly channel-rate asymmetry. The aggregate custody signal (ACS) is recently proposed to resolve the effect of asymmetric channel rates in deep-space networks. In this article, these three acknowledgment mechanisms are studied, with a focus on a comparison of their effectiveness evaluation over highly asymmetric deep-space network channels accompanied by data loss. The study is conducted through realistic file delivery via an experimental testbed infrastructure. It is found that the ACS mechanism shows significant performance advantages over other two mechanisms for both the “normalized” goodput and total data amount in successful file delivery. In particular, the ACS mechanism makes it a better choice to operate with small data bundles without increasing the RTO timer length.