NextGenGW - a Software Framework Based on MQTT and Semantic Definition Format

To access all the potential value present in IoT, the IoT devices need to be interoperable. Some works in the literature target this issue, but it is not yet entirely solved, mainly because the proposed solutions are not standard-based at the semantic level. This paper presents the detailed implementation of our standard-based software framework targeting IoT interoperability, named NextGenGW. With NextGenGW, we propose the first integration of IETF SDF with the MQTT protocol. We define an evaluation baseline for validating IoT gateway performance while focusing on interoperability. Our evaluation results show the NextGenGW suitability for deployment in devices with reduced resources and for use cases that require high scalability both in terms of connected IoT end nodes and the number of requests per time interval.