火星智能邻近网络的缓冲管理策略

M. Prathaban, J. Kohlenberg
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引用次数: 5

摘要

未来的火星任务将需要有效的地面通信网络来支持探测活动和科学现场数据收集。为了满足未来火星探测任务的需要,美国宇航局已经提出了各种近距离网络。这些近距离网络相对较小,距离较短,通常是特设的无线网络,通常专门用于传输现场传感数据等任务。本文总结了这些近距离网络所面临的挑战。为了增加火星探测车的通信距离,提出了一种带中继器的近距离网络结构。我们还描述了火星应答协议,该协议使网络比从地球远程操作更自主。为了在如此具有挑战性的网络环境中实现数据传输,研究人员提出了使用存储-携带-转发协议。然而,邻近网络节点(例如火星探测器)的缓冲区大小不可避免地受到限制。因此,当节点缓冲区的操作接近其容量时,需要有效的缓冲区管理策略来决定应该丢弃哪些消息。本文提出了图像数据流量的缓冲管理策略。通过仿真,我们已经证明,与其他策略相比,我们的缓冲管理策略在所有场景中都提供了最佳的交付比。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Buffer Management Policy for Mars Intelligent Proximity Network
Future Mars missions will require effective surface communications network supporting exploration activities and scientific field data collection. In order to meet the need for future Mars exploration missions, NASA has come up with various proximity networks. These proximity network are relatively small, fairly short-range, often ad hoc, wireless network typically dedicated to tasks such as transporting in site sensing data. This paper enlist the challenges in these proximity networks in general. We describe proximity network architecture with repeaters to increase the communication range of the Mars exploration rovers. We also describe the Mars reply protocol which make the network autonomous than remotely operated from Earth. In order to achieve data delivery in such challenging networking environments, researchers have proposed the use of store-carry-and-forward protocols. However, the buffer size in proximity network nodes (Mars rover for example) are unavoidably limited. Thus, efficient buffer management policies are necessary to decide which messages should be discarded, when node buffers are operated close to their capacity. In this paper, we have proposed buffer management policy for image data traffic. Using simulation we have shown that our buffer management policy provided optimal delivery ratio in all scenario when compared with other policies.
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