Wireless System Selection with Spectrum Database for IoT

Abstract

In recent years, Long Range Wide Area Network (LoRaWAN) has attracted attention because it enables long-distance communication with low power. LoRaWAN adopts the MAC protocol is based on Pure ALOHA and the terminal can send packets at any time. However, the problem is that packet collisions frequently occur as the number of terminals increases. On the other hand, Bluetooth Low Energy (BLE) which is standardized for short-distance communication for IoT is now widely used in various IoT devices because it enables high speed and stable communication. Therefore, we proposed a method that can reduce the traffic on the LoRaWAN by dynamically selecting LoRaWAN and BLE when the terminals move in an environment where it can use both systems. However, it is necessary to consider the Quality of Service (QoS) requirements which are the application requirements of the terminal because LoRaWAN and BLE is standardized supposed different target applications. Therefore, in this paper, we propose a method that can adaptively select a system by weighting the QoS realizations of each system such as the packet error rate predicted using the spectrum database and the power consumption during communication with the application requirements of the terminal.