Analysis of energy savings through an acknowledgement policy for efficient power management in LoRaWAN for IoT in a ship

Abstract

As data-based ship management and control are required, Internet of Things (IoT) technology is increasingly needed to obtain and accurately transmit various types of information within ships. Considering an IoT network onboard a ship, technology that reduces the energy consumption of deployed wireless devices and guarantees reliable communication is essential for continuously acquiring various types of data within the ship and ensuring accurate data collection. The long-range wide-area network (LoRaWAN) protocol is a promising technology for IoT because it supports long-range communication and bit rates suitable for IoT applications. Applying the LoRaWAN protocol to IoT networking onboard ships requires energy-efficient operations. Although the LoRaWAN protocol generally has an energy-efficient operation, the low-complexity communication scheme, such as the deferred transmission of the downlink frame, limits the energy-efficient operation of the end devices. Therefore, this study proposes an energy-efficient scheme with an acknowledgement policy that complies with the LoRaWAN standard and analyzes the energy savings of the proposed method.