Abstract
LoRa modulation is a narrowband, long-range wireless communication technology. At present, Sub-GHz LoRa is mainly used to build LoRaWAN and is applied to data collection of Internet of Things. However, the latest 2.4 GHz LoRa can be applied to point-to-point and self-organizing networks. In this paper, the impacts of bandwidth (BW) and spreading factor (SF) on the energy consumption is evaluated for the first time. In general, to reach the target transmission distance, a larger SF or a smaller BW can be selected to reduce transmitting power (but the ToA time will increase in this case), or the desired transmission distance can be achieved by increasing the transmitting power and keeping a smaller SF or a larger BW. obviously, both of them will increase the power consumption of transmission. We analyze which method is more energy-efficient by constructing an energy consumption model for LoRa communication. The energy model is suitable for the adaptive data rate (ADR) of LoRa and establishes the foundation for building low-energy node-to-node and Ad-hoc LoRa networks.
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Acknowledgement
This work was supported by the National Nature Science Foundation of China (Grant number: 61902167, 61871204, 61901207), the Nature Science Foundation of Fujian Province, China (Grant number: 2021J011015), Digit Fujian Internet-of-Things Laboratory of Environmental Monitoring Research Fund (Fujian Normal University) (Grant number: 202006). Educational Research Projects of Young and Middle-aged Teachers in Fujian Province (Grant number: JAT200432).
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Luo, H., Xiao, L., Wu, L., Ruan, Z., Lin, W. (2022). How to Select SF and BW for 2.4 GHz LoRa Ad-Hoc Communication: From Energy Consumption Perspective. In: Calafate, C.T., Chen, X., Wu, Y. (eds) Mobile Networks and Management. MONAMI 2021. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 418. Springer, Cham. https://doi.org/10.1007/978-3-030-94763-7_7
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DOI: https://doi.org/10.1007/978-3-030-94763-7_7
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