Delay-tolerant networking (DTN) bundle protocol is considered one of the best transmission protocols to be used in space communications by NASA. There are studies that evaluated the performance, measuring the total transfer time of a complete file from sender to receiver, of the DTN protocol via simulation or emulated experiments beyond the real space-based experiences. In addition, there is a very few additional research works available for the modeling of the Licklider transmission protocol (LTP). However, these past studies on LTP modeling are implemented as a Logarithmic approach that is based on the calculation of loss segments in file delivery. In this work, the approach is investigated in a different manner. Specifically, the performance model was created based on the probability of the segment's successful delivery on the LTP. Moreover, the original model is enhanced via introducing a burst of transfer and equal interval distribution of signaling segments, specifically check point (CP), along with the retransmission time out (RTO). The results from the developed model for the original DTN protocol and enhanced versions align with the results obtained by PC-based testbeds.

中文翻译：

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通过深空网络中信令段的主动传输对 Licklider 传输协议 (LTP) 进行性能建模

延迟容忍网络 (DTN) 捆绑协议被 NASA 认为是用于空间通信的最佳传输协议之一。有研究评估了 DTN 协议的性能，测量了一个完整文件从发送者到接收者的总传输时间，通过模拟或仿真实验超出了真实的天基经验。此外，还有很少的其他研究工作可用于 Licklider 传输协议 (LTP) 的建模。然而，这些过去关于 LTP 建模的研究是作为基于文件传输中损失段计算的对数方法实现的。在这项工作中，该方法以不同的方式进行了研究。具体来说，性能模型是根据分段在 LTP 上成功交付的概率创建的。而且，通过引入突发传输和信令段的等间隔分布，特别是检查点 (CP) 以及重传超时 (RTO)，原始模型得到了增强。原始 DTN 协议和增强版本的开发模型的结果与基于 PC 的测试台获得的结果一致。