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Measurement and Analysis of Near-Ground Propagation Models under Different Terrains for Wireless Sensor Networks

机译：无线传感器网络不同地形下近地传播模型的测量与分析

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摘要

The propagation model is an essential component in the design and deployment of a wireless sensor network (WSN). Although much attention has been given to near-ground propagation models, few studies place the transceiver directly on the ground with the height of antennas at the level of a few centimeters, which is a more realistic deployment scenario for WSNs. We measured the Received Signal Strength Indication (RSSI) of these truly near-ground WSNs at 470 MHz under four different terrains, namely flat concrete road, flat grass and two derived scenarios, and obtained the corresponding path loss models. By comprehensive analysis of the influence of different antenna heights and terrain factors, we showed the limit of existing theoretical models and proposed a propagation model selection strategy to more accurately reflect the true characteristics of the near-ground wireless channels for WSNs. In addition, we implemented these models on Cooja simulator and showed that simplistic theoretical models would induce great inaccuracy of network connectivity estimation.
机译：传播模型是无线传感器网络（WSN）设计和部署中的重要组成部分。尽管已经对近地传播模型给予了很大的关注，但是很少有研究将收发器直接放置在地面上，天线的高度在几厘米的水平，这对于WSN来说是更现实的部署方案。我们在四个不同的地形，即平坦的混凝土路面，平坦的草地和两个派生场景下，测量了这些真正的近地WSN在470 MHz时的接收信号强度指示（RSSI），并获得了相应的路径损耗模型。通过对不同天线高度和地形因素的影响的综合分析，我们证明了现有理论模型的局限性，并提出了一种传播模型选择策略，以更准确地反映WSN的近地无线信道的真实特性。此外，我们在Cooja模拟器上实现了这些模型，并表明简单的理论模型会引起网络连接估计的巨大不准确性。

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