Techniques are presented herein that support the guaranteed and timely delivery of operational technology (OT) messages across any technology-agnostic, wireless Internet of things (IoT) gateway (within a cluster, a truck platoon, a mobility as a service (MaaS) use case, etc.) when the primary node that is running an MQTT publisher (having an active network connection to an MQTT broker or MQTT server) becomes unavailable. Under such an arrangement, an MQTT broker could, depending upon the MaaS or other use case, be running in an edge layer (in an edge-native mode, in a fog layer, or in a cloud layer as in a public cloud provider). While the presented techniques may be applied to any deployment paradigm, they are particularly relevant to roaming MQTT broker, publisher, and subscriber nodes. The presented techniques carry a very low overhead and may be applied to any type of wireless technology such as, for example, the Thread network protocol, Wi-Fi, variants of the Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 technical standard, the long-term evolution (LTE) standard, the 3rd Generation Partnership Project (3GPP) fifth-generation (5G) cellular network standard, satellite-based communications, etc.

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Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.