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The broad range of requirements of Internet of Things applications has leadto the development of several dedicated communication technologies, eachtailored to meet a specific feature set. A solution combining differentwireless technologies in one device, can overcome the disadvantages of anyindividual technology. The design of such Multiple Radio Access Technologysolutions based on the diverse characteristics of the technologies offersinteresting opportunities. In this work we analyze the potential of combiningLoRaWAN and NB-IoT in a Multi-RAT solution for IoT. To that end we evaluate keyIoT node requirements in function of payload size and link quality: (1) energyefficiency, (2) coverage, (3) payload size, (4) latency performance, (5)Quality of Service, and (6) cost efficiency. Our theoretical assessment andexperimental validation of these IoT features show the merits of a Multi-RATsolution. Notably, energy consumption in use cases with only sporadic largepayload requirements, can be improved by a factor of at least 4 with respect toeither single-mode technologies. Moreover, latency-critical messages can getdelivered on time and coverage can be extended elegantly where needed.

Multi-RAT for IoT: The Potential in Combining LoRaWAN and NB-IoT