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首页> 外文期刊>Aerospace and Electronic Systems, IEEE Transactions on >Modeling memory-variation dynamics for the Licklider transmission protocol in deep-space communications
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Modeling memory-variation dynamics for the Licklider transmission protocol in deep-space communications

机译：在深空通信中为Licklider传输协议建模内存变化动态

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摘要

Delay/disruption-tolerant networking was developed to enable automated network communications despite the long link delay and frequent link disruptions that generally characterize deep-space communications. It uses the well-known approach of store-and-forward with optional custody transfer, in which a node agrees to hold a file in memory (or storage) until its successful reception is acknowledged by the next node. The performance and memory consumption of delay/disruption-tolerant networking's Licklider transmission protocol (LTP) and bundle protocol in deep space will bear on decisions to adopt this technology. There is currently an urgent need to evaluate the performance and memory dynamics for file transmission by LTP and bundle protocol. In this paper, we present a study of memory dynamics for LTP-based transmission in a typical relay-based deep-space communication system characterized by an extremely long signal-propagation delay, lossy data links, and asymmetric data rates. Analytical models are built to quantify the dynamics of memory occupancy/release and memory release latency imposed by the use of LTP for reliable and complete file delivery in deep-space missions. File-transfer experiments are conducted using a test bed to validate the models.
机译：尽管存在延迟/中断容忍的网络，但是尽管存在较长的链路延迟和频繁的链路中断（通常是深空通信的特征），但仍能够实现自动化的网络通信。它使用公知的存储和转发方式以及可选的贸易交接方式，其中节点同意将文件保存在内存（或存储器）中，直到下一个节点确认其成功接收为止。延迟/中断容忍网络的Licklider传输协议（LTP）和捆绑协议在深空中的性能和内存消耗将决定采用该技术的决定。当前，迫切需要评估通过LTP和捆绑协议进行文件传输的性能和内存动态。在本文中，我们对典型的基于中继的深空通信系统中基于LTP的传输的内存动态进行了研究，该系统具有极长的信号传播延迟，有损耗的数据链路和不对称的数据速率。建立分析模型的目的是量化由于使用LTP在深空任务中可靠而完整地传送文件而造成的内存占用/释放和内存释放延迟的动态变化。使用测试台进行文件传输实验以验证模型。

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