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About this paper
Keila Lima, Tosin Daniel Oyetoyan, Rogardt Heldal, Wilhelm Hasselbring
An empirical study from Western Norway University of Applied Sciences and Kiel University evaluated MQTT bridge architectures in cross-organizational IoT, quantifying the impact of deployment options, QoS levels, and payload sizes on message delivery latency and reliability. The research found that QoS 0 exhibits over 99% message loss for payloads exceeding 1.5 KB in distributed setups, while QoS 1 and 2 ensure 100% reliability at higher latencies.
Key insights
- QoS level is the dominant factor for message reliability, especially for larger payloads in a distributed, cross-organizational setting, while QoS 0 is largely unsuitable for payloads above 1.5 KB.
- The architectural choice of fewer client-side bridge components (one per data provider) generally results in lower end-to-end message latency compared to more granular deployments (one per data stream).
- Payload size significantly impacts QoS 0 reliability, demonstrating that even modest increases in message size can lead to catastrophic message loss in distributed IoT environments.
Summary by alphaXiv.
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