# Impact of MQTT Based Sensor Network Architecture on Delivery Delay Time

## TL;DR

This paper introduces two novel MQTT-based sensor network architectures for IoT that ensure continued operation during internet outages, analyzing their impact on message delivery delay times.

## Contribution

It presents new architectures with an additional layer for autonomous operation, enhancing IoT sensor network resilience during internet disconnections.

## Key findings

- The proposed architectures maintain message delivery during internet outages.
- Comparative analysis highlights the delay performance of each architecture.
- The study demonstrates improved system robustness with the new schemes.

## Abstract

The purpose of this study is to present two new architectures of the complexes of embedded systems in the context of the Internet of Things. The proposed new schemes use the MQTT protocol, but provide both an autonomous operation and an online mode. This is achieved by adding one additional layer, which consists of its own MQTT-broker and critical messages handler, so that in case of the Internet access disappearance, the system could continue to respond to changes. The research of message delivery delays has been carried out for the proposed models. The comparative analysis was conducted to identify the advantages and disadvantages of both solutions.

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Source: https://tomesphere.com/paper/1812.03296