Sharing Studies between 5G IoT Networks and Fixed Service in the 6425-7125 MHz Band with Monte Carlo Simulation Analysis.

Alexander Pastukh,Valery Tikhvinskiy,Aigul Kulakayeva,Evgeny Devyatkin

doi:10.3390/s22041587

Abstract

This work presents sharing studies between 5G networks and point-to-point fixed service in the 6425–7125 MHz band. In this research, we provide simulations of interference from 5G downlink and uplink to fixed service in the frequency band 6425–7125 MHz. We evaluated several scenarios of interference, which include cross-border scenarios, as well as scenarios of interference within the borders of one administration. The obtained results of this work are presented as protection distance and frequency offsets that are required in order to achieve compatibility between 5G and FS in the 6425–7125 MHz band. The spectrum engineering techniques presented in this research can help different companies and regulatory administrations in their spectrum management and frequency regulation activities and seriously improve the efficiency of implementation for 5G technologies.

Highlights

The protection criterion for the fixed service used was interference-to-noise ratio (I/N) = −10 dB for 20% of the time according to the Recommendation ITU RadiocomRadiocommunication Sector (ITU-R) F.758
Additional protection criterion C/I = 30 dB was considered which corresponds to the 64QAM modulation order that is the most typical for fixed service point-to-point stations in the 6425–7125 MHz frequency band
The protection distances based on C/I are enough to provide compatibility in a worst-case scenario, since the protection distances are shorter than the fixed service (FS) link lengths

Summary

Introduction

This article is a significant extension of the previously done studies [1], related to sharing of the frequency band 6425–7125 MHz, between 5G and fixed service (FS). While previous studies focused on cross-border scenarios only, this study includes new compatibility research, related to sharing the frequency band 6425–7125 MHz, between 5G and FS at a national level, which includes interference scenarios where the receiving fixed service station is located within the borders of the 5G network cluster. Adjacent channel interference simulations were done and protection frequency offsets were proposed. This article analyzes different approaches that national administrations can use in order to achieve compatibility between 5G and FS in the 6425–7125 MHz frequency band. In this article we provided more detailed methodology of how the interference from

Methods

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Discussion

Conclusion