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Title	Path Loss In Urban Lora Networks: A Large-Scale Measurement Study
ID_Doc	41436
Authors	Rademacher M.; Linka H.; Horstmann T.; Henze M.
Year	2021
Published	IEEE Vehicular Technology Conference, 2021-September
DOI	http://dx.doi.org/10.1109/VTC2021-Fall52928.2021.9625531
Abstract	Urban LoRa networks promise to provide a cost-efficient and scalable communication backbone for smart cities. One core challenge in rolling out and operating these networks is radio network planning, i.e., precise predictions about possible new locations and their impact on network coverage. Path loss models aid in this task, but evaluating and comparing different models requires a sufficiently large set of high-quality received packet power samples. In this paper, we report on a corresponding large-scale measurement study covering an urban area of 200 km2 over a period of 230 days using sensors deployed on garbage trucks, resulting in more than 112 thousand high-quality samples for received packet power. Using this data, we compare eleven previously proposed path loss models and additionally provide new coefficients for the Log-distance model. Our results reveal that the Log-distance model and other well-known empirical models such as Okumura or Winner+ provide reasonable estimations in an urban environment, and terrain based models such as ITM or ITWOM have no advantages. In addition, we derive estimations for the needed sample size in similar measurement campaigns. To stimulate further research in this direction, we make all our data publicly available. © 2021 IEEE.
Author Keywords	LoRa; LoRaWAN; Low-Power Wide Area Network (LP-WAN); Measurement; Path Loss; Urban

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