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Narrowband Internet of Things (NB-IoT) is a recent addition to the 3GPPstandards offering low power wide area networking (LP-WAN) for a massive amountof IoT devices communicating at low data rates in the licensed bands. As thenumber of deployed NB-IoT devices worldwide increases, the question ofenergy-efficient real-world NB-IoT device and network operation that wouldmaximize the device battery lifetime becomes crucial for NB-IoT servicepopularity and adoption. In this paper, we present a detailed energyconsumption of an NB-IoT module obtained from a custom-designed NB-IoT platformfrom which a large amount of high time-resolution data is collected. We performa detailed energy consumption analysis of each NB-IoT data transfer phase anddiscuss both the device and the network-side configurations that may affect themodule energy consumption in each of the phases. Preliminary results andconclusions are put forth along with the discussion of ongoing and future studyplans.

In-depth Real-World Evaluation of NB-IoT Module Energy Consumption