MAC Protocol for Reducing Outage Probability in DECT-2020 New Radio

DECT-2020 New Radio (NR) is a Radio Interface Technology (RIT) recognized for fulfilling the requirements of IMT-2020 Ultra Reliable Low Latency Communications (URLLC) and massive Machine Type Communications (mMTC) application scenarios. A single DECT-2020 NR Radio Device (RD) in Fixed Termination (FT) mode announces the radio resources, while other RDs in Portable Termination (PT) mode directly connect to it. A single RD can also operate in both modes simultaneously as an FT/PT. In this research work, we consider the requirement of an ultra-reliable DECT-2020 NR private network with a limited number of RDs in a given Region Of Interest (ROI) and propose a Medium Access Control (MAC) protocol to reduce the outage probability by exploiting the FT/ PT mode functionality of an RD. We utilize the Cluster and Network Beacon Messages periodically transmitted by the FT to prompt connected PTs to change to FT/PT mode and route the data for a specific RD positioned in an outage location, ensuring an outage rate of less than 1% in the ROI. Furthermore, we demonstrate the effectiveness of our proposed technique through event-based simulations.