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On the sensitivity of geo-based content sharing to location errors

机译：基于地理位置的内容共享对位置错误的敏感性

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A number of opportunistic content sharing services were developed that exploit device-to-device contacts for infrastructure-less operation. All of them depend, like geo-based ad-hoc routing protocols, on mobile devices knowing their respective positions to accurately perform data replication. In this paper, we explore the impact of different types of location errors on the performance of such a service. We use a GPS error distribution for mobiles derived from real-world measurements, consider different frequencies for GPS readings, and account for only subsets of mobile devices actively using GPS. We carry out extensive simulation studies using synthetic mobility models as well as real-world traces to assess the impact of different types of errors. We find that, overall, opportunistic content sharing is quite robust provided that a sufficient number of nodes support GPS and allow the others to have a rough estimate of where they are. Whether or not the GPS position is prone to errors affects some scenarios and is almost negligible in others.
机译：开发了许多机会性的内容共享服务，这些服务利用设备到设备的联系人来实现无基础架构的操作。像基于地理位置的临时路由协议一样，它们都依赖于移动设备，知道它们各自的位置以准确执行数据复制。在本文中，我们探讨了不同类型的位置错误对此类服务性能的影响。我们将GPS误差分布用于从实际测量中得出的移动设备，考虑GPS读数的不同频率，并仅考虑积极使用GPS的移动设备的子集。我们使用综合迁移率模型以及真实世界的痕迹进行了广泛的仿真研究，以评估不同类型错误的影响。我们发现，总体而言，机会主义的内容共享非常强大，只要有足够数量的节点支持GPS，并允许其他节点粗略估计它们的位置。 GPS位置是否容易出错会影响某些情况，而在其他情况下几乎可以忽略不计。

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