In prospective consumer spaces where a great number of autonomous Internet of Things (IoT) devices are loosely cooperating with each other, many requests can unexpectedly concentrate on a single IoT device. We are researching a system which would allow a process on an IoT device to provisionally migrate to a backup computer in such cases. As the first step, this paper proposes a method of running the core image of an IoT controller on a backup computer with a different architecture. We then evaluate its performance, which demonstrates the appropriateness of the direction of this research.