Throughput Improvement for LoRaWAN Networks Considering IoT Applications Priority

The pure Aloha access scheme used in LoRaWAN increases the probability of collisions at a large scak, which will lead to a reduction in the packet delivery ratio (PDR) and the network throughput. As a result, Legacy LoRaWAN cannot guarantee quality of service (QoS). However, a heterogeneous LoRaWAN network consists of several Internet of Things (IoT) applications that differ in their QoS requirements and can be classified into different priority levels This paper proposes an algorithm, called “spreading factor with priority” (SF-P), that aims to maximize the LoRaWAN network throughput while distinguishing between nodes in terms of priority. Simulation results show that SF-P improves the network throughput compared to Legacy LoRaWAN and respects the priority between different IoT applications.