for 5G network development in Almaty city Aigul Kulakayeva, IITU, - - PowerPoint PPT Presentation

Monitoring of promising frequency ranges for 5G network development in Almaty city

Aigul Kulakayeva, IITU, Kazakhstan Valery Tikhvinskiy, NIIR & MTUCI, Russia Altay Aitmagambetov, IITU, Kazakhstan Almash Zhaksylyk IITU, Kazakhstan Bagdat Kozhakhmetova, IITU, Kazakhstan Conference paper​ ICEMIS, Almaty? Republic of Kazakhstan, 2020

INTRODUCTION

3GPP partnership project in the Releases 15 and 16 identified two subbands for the future implementation of 5G mobile networks: FR1 (below 6 GHz) and FR2 (submillimetre and millimetre wave bands). More than 85 frequency bands from 410 MHz to 7125 MHz are defined in the first subband. The Communications Administration of the Republic of Kazakhstan refers a number of new frequency bands such as 700 MHz, 3.5 GHz, and 4.9 GHz to the most promising frequency bands for 5G networks. To introduce 5G networks, it is necessary to perform not

• nly theoretical, but also practical assessment of the existing load of these radio

electronic equipment (REE) bands intended for various purposes in order to release the radio spectrum for interference-free operation of 5G networks if necessary.

STUDY ACTUALITY

Monitoring of the radio frequency spectrum in this case is one of the ways of its load assessment to solve the advanced radio frequency spectrum management challenges for the development of new 5G mobile communication technology. Spectrum monitoring is an important tool for spectrum management due to its ability to monitor and measure signals; detect and identify unauthorized REE; determine the location of REE for further application of measures of influence; identify sources of harmful radio emissions. The development of new generation of wireless networks depends on the effectiveness of radio monitoring systems. The study considers the methodology for the monitoring and assessment of the electromagnetic environment within promising frequency bands for 5G networks development on the example of the largest city of the Republic of Kazakhstan.

Operating band NR Uplink (UL) Operating band BS receiving /UE transmission FuL_low – FuL_high Downlink (DL) Operating band BS transmission / UE receiving FDL_low – FDL_high Duplex mode n12 699 MHz – 716 MHz 729 MHz – 746 MHz FDD n14 788 MHz – 798 MHz 758 MHz – 768 MHz FDD n28 703 MHz – 748 MHz 758 MHz – 803 MHz FDD n83 703 MHz – 748 MHz N/A SUL FDD - Frequency Division Duplex SUL - Supplementary Uplink

700 MHz bands within 5G FR1 - subband

Operating band NR Operating band Uplink (UL) BS receiving / SТ transmission FuL_low – FuL_high Operating band Downlink (DL) BS transmission / SТ receiving FDL_low – FDL_high Duplex mode n77 3300 MHz – 4200 MHz 3300 MHz – 4200 MHz TDD n78 3300 MHz – 3800 MHz 3300 MHz – 3800 MHz TDD TDD - Time Division Duplex

3.5 GHz bands within 5G FR1-subband

Stationary maintenance-free monitoring and direction finding station BARS-MPI3

Results of monitoring the frequency band of 686-710 MHz in Almaty

Results of monitoring the frequency band of 710-734 MHz in Almaty

Results of monitoring the frequency band of 758-782 MHz in Almaty

Results of monitoring the frequency band of 3400 - 3800 MHz in Almaty

CONCLUSIONS

1.Results of spectrum monitoring showed that there are no operating REEs within the frequency band of 3400 - 3800 MHz and the band is available for the development of 5G networks in Almaty-city.

• 2. Now within 5G frequency band of 686-782 MHz analogue television stations are
• perating, and they will be switched off in 2021.
• 3. In interest of 5G development is necessary to improve the functions and mechanisms of

radio monitoring system. Within the framework of existing ground-based radio monitoring facilities, it is impossible to perform qualitatively the functions and tasks of spectrum monitoring overall the country.

• 4. One of the ways on increasing the efficiency of the spectrum monitoring system is

utilization of possibilities of low-orbit small spacecraft as radio monitoring stations..

Thank you!​