Summary
International Workshop on Smart Info-Media Systems in Asia
2022
Session Number:RS1
Session:
Number:RS1-4
Experimental Evaluation and Field Tests of LoRa Energy Consumption Optimization Approach Using Software-Defined Radio
Kyotaro Kunii, Takuya Yasugi, Hiroshi Tsutsui, Takeo Ohgane,
pp.45-50
Publication Date:2022/9/15
Online ISSN:2188-5079
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Summary:
In this paper, we propose a method for evaluating energy consumption of LoRa communication and conduct ?eld tests using software de?ned radio (SDR) in order to study the optimization of LoRA parameters. LoRa modulation is a communication method featuring wide-range communication with low energy consumption, and has attracted attention for its use in IoT devices. LoRa modulation has a parameter called spreading factor, which allows for a trade-off between communication time and noise immunity. The energy required for communication varies depending on the spreading ratio setting, transmission power, and environment. In this paper, ?eld tests were conducted to consider parameter optimization in LoRa communications. For the processing of LoRa modulation required for the tests, SDR technology was used, which allows for ?exible radio design. A method for comparing energy consumption was also pro-posed, and this was used to compare energy consumption for each environment and parameter to data from ?eld tests. Test results show that similar minimum energy consumption can be achieved for each spreading factor by adjusting the transmission power. In addition, it was con?rmed that obstacles have a more signi?cant impact on LoRa communication than distance, and LoRa communication performance changes rapidly over a narrow range of transmit power.