Análise de desempenho de junção à rede via OTAA e uso de ciclo útil em redes LoRaWAN

Abstract

Wireless networks with demands for coverage over long distances and low power are became more requested and used in several applications. Among these technologies, one of the most promising is the LoRa technology, together with the LoRaWAN protocol. However, so many internal parameters and external factors may be influencing the network performance, including the device’s joining procedure at the LoRaWAN network. Furthermore, for high density networks, the adoption of duty cycle limits are essential for a good operation. In order to mitigate this problem, three different strategies for duty cycle usage during transmissions of join request frames are proposed: exponential, linear and constant. Additionally, will be presented two additional strategies to improve the performance of join procedure, with the use of adaptative data rate and an adaptative random margin for duty cycle periods. For validation of the methods, internal and external network parameters will be evaluated, in order to assess the performance impact of the proposals, analyzed through experimental results, using real devices with focus on the join procedure.