MoteTrack: a robust, decentralized approach to RF-based location tracking
MoteTrack: a robust, decentralized approach to RF-based location tracking
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DOI：
10.1007/s00779-006-0095-2
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发表时间：
2007-01-01
影响因子：
--
通讯作者：
Welsh, Matt
中科院分区：
文献类型：
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作者：
Lorincz, Konrad;Welsh, Matt
在本文中，我们提出了一个强大的，分散的方法，基于RF的位置跟踪。我们的系统，称为MoteTrack，是基于低功耗无线电收发器加上适量的计算和存储能力。MoteTrack不依赖于任何后端服务器或网络基础设施：每个移动的节点的位置是使用从多个信标节点接收到的无线电信号强度签名计算的，该签名是跨信标节点本身复制的。这种设计使系统能够在无线电信标基础设施出现重大故障的情况下运行。在我们部署的MoteTrack，包括分布在我们的计算机科学大楼的23个信标节点，我们实现了第50百分位和第80百分位的位置跟踪精度分别为0.9和1.6米。此外，MoteTrack可以容忍高达60%的信标节点的故障，而不会严重降低准确性，使系统适合在高度不稳定的条件下部署。我们提出了一个详细的分析MoteTrack的性能在广泛的条件下，包括在障碍物的数量，信标节点故障，无线电签名扰动，接收器的灵敏度，和信标节点密度的变化。
In this paper, we present a robust, decentralized approach to RF-based location tracking. Our system, called MoteTrack, is based on low-power radio transceivers coupled with a modest amount of computation and storage capabilities. MoteTrack does not rely upon any back-end server or network infrastructure: the location of each mobile node is computed using a received radio signal strength signature from numerous beacon nodes to a database of signatures that is replicated across the beacon nodes themselves. This design allows the system to function despite significant failures of the radio beacon infrastructure. In our deployment of MoteTrack, consisting of 23 beacon nodes distributed across our Computer Science building, we achieve a 50th percentile and 80th percentile location-tracking accuracy of 0.9 and 1.6 m respectively. In addition, MoteTrack can tolerate the failure of up to 60% of the beacon nodes without severely degrading accuracy, making the system suitable for deployment in highly volatile conditions. We present a detailed analysis of MoteTrack's performance under a wide range of conditions, including variance in the number of obstructions, beacon node failure, radio signature perturbations, receiver sensitivity, and beacon node density.