Análise de desempenho do protocolo MQTT-SN no padrão IEEE 802.11 utilizando o simulador OMNET++ para aplicações IOT.

Abstract

The Internet of Things (IoT) refers to a network composed of elements such as communication, sensors, and services that enable internet browsing, information exchange, and communication between devices. The efficiency of this information exchange depends on communication protocols, which directly impact the performance of devices. With the growing demand for IoT devices in various applications, communication performance has become a critical factor due to the constant increase in the volume of transmitted data. This work aimed to analyze the performance of the MQTT-SN communication protocol applied to IoT devices. To this end, metrics of interest were established and simulations of IoT system application scenarios, such as high publishing frequency, increased publishers, and broadcast, were performed in the OMNeT++ network simulator. The results indicated that latency increases with higher levels of Quality of Service (QoS) and is impacted by network overloads. In the scenario with high publishing frequency, a higher overhead rate was observed, while the broadcast scenario presented lower latency and a message delivery rate close to 100%. In the scenario with progressive increase in publishers, throughput increased significantly as the number of publishers increased. These results highlight the importance of balancing QoS requirements, publication and subscription intervals, and the number of devices in the network to maximize communication performance.