Targeted as the main protocol of delay/disruption-tolerant networking (DTN) for space, bundle protocol (BP) is intended to establish an overlay network for reliable file delivery in a heterogeneous networking environment. Reliable data transmission mechanisms of BP are presently under development. In this paper, a new transmission approach is proposed for BP for highly reliable data delivery in deep-space vehicle communications in presence of an unpredictable or random link disruption. The main idea of the proposed approach is to use a hybrid of proactive retransmission and reactive retransmission mechanisms during file transfer. Analytical models are built in various transmission cases to study the effect of link disruption on reliable transmission of BP, with focus on the number of failed transmission attempts, file delivery time and goodput performance normalized with respect to the total amount of data sent. The models are validated by the file transfer experiment over a PC-based testbed. A performance comparison between the proposed approach and the existing transmission approach with respect to transmission reliability is also presented.

中文翻译：

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存在链路中断时可靠的深空飞行器通信的捆绑协议的混合重传


捆绑协议 (BP) 作为空间延迟/中断容忍网络 (DTN) 的主要协议，旨在建立一个覆盖网络，以便在异构网络环境中实现可靠的文件传输。 BP的可靠数据传输机制目前正在开发中。本文提出了一种新的 BP 传输方法，用于在存在不可预测或随机链路中断的情况下，在深空飞行器通信中实现高度可靠的数据传输。所提出方法的主要思想是在文件传输期间使用主动重传和被动重传机制的混合。在各种传输案例中建立分析模型，研究链路中断对 BP 可靠传输的影响，重点关注传输尝试失败次数、文件传输时间以及相对于发送数据总量归一化的良好吞吐量性能。这些模型通过基于 PC 的测试台上的文件传输实验进行了验证。还提出了所提出的方法与现有传输方法在传输可靠性方面的性能比较。