Design of WiFi-AP operating channel estimation scheme for sensor node
Design of WiFi-AP operating channel estimation scheme for sensor node
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DOI：
10.1109/icmu.2016.7742084
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发表时间：
2016-11
期刊：
影响因子：
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通讯作者：
S. Ishida;Yosuke Kunihiro;Kousaku Izumi;S. Tagashira;Akira Fukuda
中科院分区：
文献类型：
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作者：
S. Ishida;Yosuke Kunihiro;Kousaku Izumi;S. Tagashira;Akira Fukuda
由于GPS（Global Positioning System）定位技术在室内环境中的不可用性，传感器定位是构建大规模室内传感器网络时面临的一个重要问题。我们正在开发一个传感器定位系统，使用WiFi AP作为锚，这需要没有锚部署。由于传感器节点不能解调WiFi信号，我们已经开发了一种跨技术的RSS（接收信号强度）测量方案与AP识别方案[1，2]。在本文中，我们提出了WiChest，WiFi-AP工作信道估计方案，以准确地测量传感器节点上的AP-RSS。AWiFi信道与四个ZigBee信道重叠。AP-RSS依赖于传感器节点测量RSS的ZigBee信道。使用WiChest，传感器节点在RSS测量之前基于估计的AP信道自动切换其信道。我们实现了WiChest使用MICAz传感器节点。实验评估表明，WiChest准确地估计AP工作信道的F-测量值为0.80。
Sensor localization is one of the big problems when building large scale indoor sensor networks because GPS (Global Positioning System) is unavailable in indoor environments. We are developing a sensor localization system using WiFi APs as anchors, which requires no anchor deployment. Because sensor nodes cannot demodulate WiFi signals, we have developed a cross-technology RSS (received signal strength) measurement scheme with an AP recognition scheme [1, 2]. In this paper, we present WiChest, a WiFi-AP operating channel estimation scheme to accurately measure AP-RSS on sensor nodes. AWiFi channel overlaps with four ZigBee channels. AP-RSS depends on a ZigBee channel in which a sensor node measures the RSS. Using WiChest, a sensor node automatically switches its channel based on an estimated AP channel prior to RSS measurement. We implemented WiChest using a MICAz sensor node. The experimental evaluations reveal that WiChest accurately estimates AP operating channels with an F-measure of 0.80.