Comparação entre protocolos da camada de aplicação para IoT

Abstract

The number of intelligent objects with computational capacity and communication withe ach other and connection to the Internet grows increasingly. In this context, the way these devices send and receive data is one of the fundamental issues to develop the area of the Internet of Things (IoT). Based on this, the present work analyze 3 network communication protocols in this area: HTTP, MQTT and CoAP to list the fastest andmore reliable. To do this, an experiment was designed using a Raspberry Pi, serving as an IoT device, and a notebook. The experiment consists in sending a certain amount of data from the Raspberry Pi to notebooks using the previous protocols. To bring the experiment as close as possible to the reality, a network simulator was used to emulate a poor quality network. The sent data packets were captured and a statistical analysis was performed to compare 2 factors: latency and packet loss. From the result of this analysis, it was concluded that the CoAP protocol will behave better in a poor quality network, while HTTP performe the best result for superior quality network.