了解移动网络中节点相遇的周期性和规律性：频谱分析
Understanding periodicity and regularity of nodal encounters in mobile networks: A spectral analysis
摘要：
对人类移动性的研究越来越受到研究界的关注，其多种应用在移动网络中使用，特别是在延迟容忍网络中的消息传递。为了更好地了解移动节点作为消息中继的潜力，我们的研究调查了移动设备的遭遇模式。具体来说，我们研究了广泛的网络痕迹，反映了通信设备的移动性。利用功率谱分析方法分析了相遇模式的周期性。在很少遇到的移动节点中观察到较强的周期性，而在经常遇到的节点中观察到较弱的周期性。此外，我们提出了一种搜索定期遇到的配对的方法并讨论结果。据我们所知，我们是第一个分析具有大网络痕迹的相遇模式周期性的人，这是设计使用移动节点的高效交付方案的关键基础。
英文摘要：
Study on human mobility is gaining increasing attention from the research community with its multiple applications to use in mobile networks, particularly for the purpose of message delivery in the Delay Tolerant Networks. To better understand the potential of mobile nodes as message relays, our study investigates the encounter pattern of mobile devices. Specifically, we examine the extensive network traces that reflect mobility of communication devices. We analyze the periodicity in encounter pattern by using power spectral analysis. Strong periodicity was observed among rarely encountering mobile nodes while the periodicity was weaker among frequently encountering nodes. Further, we present a method to search regularly encountering pairs and discuss the findings. To our knowledge, we are the first to analyze the periodicity of encounter pattern with large network traces, which is a critical basis for designing an efficient delivery scheme using mobile nodes.
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