Coexistence Analysis Between 5G NR and Ambient IoT Systems in the Downlink

Ambient Internet of Things (A-IoT) represents an innovative advancement in IoT technology, utilizing devices with ultra-low complexity and ultra-low power consumption to facilitate extensive connectivity in IoT applications. The A-IoT system can be deployed in three operation modes with current 5G system, that is, in-band within the new radio (NR) carrier, in the guard-band of the NR carrier, and stand-alone. As in-band deployment has the greatest inter system interference, this paper focuses on studying the downlink (DL) coexistence performance of both systems through theoretical analysis and simulation. The results illustrate that the NR system has a marginal impact on the A-IoT system, and the A-IoT system has a minor impact on the NR system with a single guard resource block configuration. The analysis in this paper has shown that in-band deployment of A-IoT with 5G NR is feasible in the downlink.