Presentation Information
[B-5B-18]A Unified Energy Consumption Model for a LoRaWAN Device
〇Satoshi Yamazaki1, Hidenobu Isogai2 (1. Tokai University, 2. Hitachi ltd)
Keywords:
LPWAN,LoRaWAN,Class C,Energy Consumption,Delay
Low-Power Wide-Area Networks (LPWANs) for the Internet of Things (IoT) are attracting significant attention. This paper focuses on LoRaWAN, a type of LPWAN that operates in unlicensed frequency bands. When deploying sensor networks, end nodes (ENs) are generally required to operate on battery power for extended periods; consequently, understanding and minimizing EN energy consumption is a critical challenge. While theoretical models for estimating EN energy consumption in LoRaWAN Class A have previously been proposed, we have developed an approximate model based on field experiment results and demonstrated its validity by comparing it with theoretical findings. Furthermore, we extended the Class A theoretical model to Class B, which enables downlink (DL) reception via "ping slots" that open periodically under beacon synchronization. However, no energy consumption model has yet been developed to evaluate all device classes—including Class C, which keeps the reception window open continuously except during uplink transmissions—in a unified manner. Therefore, this paper proposes a generalized energy consumption model that extends the existing theoretical models for Class A and Class B, allowing for the unified evaluation of all LoRaWAN device classes, including Class C. We then demonstrate the validity of the model through numerical analysis.