Battery Lifetime Estimation for LoRaWAN Communications
Vítor Fialho1, Fernando Fortes2

1Vítor Fialho, ADEETC, Instituto Superior de Engenharia de Lisboa and Centre of Technology and Systems, Lisbon, Portugal.
2Fernando Fortes, ADEETC, Instituto Superior de Engenharia de Lisboa and Instituto de Telecomunicações, Lisbon, Portugal.
Manuscript received on August 13, 2020. | Revised Manuscript received on August 21, 2020. | Manuscript published on September 10, 2020. | PP: 306-310 | Volume-9 Issue-11, September 2020 | Retrieval Number: 100.1/ijitee.K78240991120 | DOI: 10.35940/ijitee.K7824.0991120
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Smart Cities concept increased the number of end devices (ED) which allow the acquisition of parameters for further analysis and processing. The actual technologies based on Internet of Things (IoT) enable sensors connectivity to Internet. This feature allows real time acquisition of several physical data important for smart cities monitoring. In order to minimize the power consumption, Low Power Wide Area Networks (LPWAN) assumes an important role on the evolution and growing of wireless network sensors. In this particular type of network, LoRaWAN has taken the lead, among other technologies. Typically most end devices need to be powered with batteries, since they are in remote zones. Therefore one important issue to consider is the global power consumption of the end device building blocks: LoRa transceiver, microcontroller unit and sensor unit. This paper presents the study and simulation results supported on LoRa modulation parameters, in order to estimate the battery lifetime, which is useful for IoT remote sensing units. The achieved results denote it is possible to configure LoRa transceiver with similar parameters and different payloads, reaching the same battery lifetime. 
Keywords: LoRaWAN, Battery lifetime, Spreading factor, Bandwidth, duty-cycle.