IoTRoam - Design and implementation of an open LoRaWan roaming architecture

IoT technologies currently operate as independent silos, and roaming is possible only if there are prior interconnection agreements. To our knowledge, there are no standardised procedures for interconnecting different IoT networks for roaming. The focus of IoTRoam is to set up an operational roaming model that scales, seamlessly works with existing IoT infrastructures and interconnects on a global basis with minimum initial configuration requirements. As a Proof-of-Concept, we designed, implemented and tested a roaming LoRaWAN architecture using time-tested infrastructures on the Internet such as PKI and the DNS. The IoTRoam experience helped us to propose changes to the LoRaWAN Backend Interface Specification that have since been accepted. We also evaluated whether the proposed mechanisms satisfy constrained IoT requirements.