Freeze-Safe IoT Hibernation using Power Profile Monitor Based on Communication-Centric Auto-Tuning

IoT systems, which are connected with irregular links between heterogeneous things, are vulnerable to fast error propagation caused by unwanted abnormal statuses. We often add system monitoring circuits to protect against unresolved freezing due to this problem. However, practical approaches in the field result in the over-specification of designs to cover all unknown problems, so that a large amount of additional power is consumed. In this paper, we adopt two ways to solve this problem efficiently: the effective reconfiguration of power state parameters for the low-power operations of embedded hardware and software in a communication-centric system-on-chip (SoC), and a design-space-exploration framework under the large-scale construction of irregular links between the processors. Given the large-scale connection of SoCs for the experiment, the system can be safely operated with a very wide monitoring active cycle, and power consumption can also be reduced.