5G NR 기지국의 전자파 노출량 평가 방법 제안 = Proposal of Method to Evaluate Exposure of EMF from 5G NR Base Station

다국어 초록 (Multilingual Abstract)

The proliferation of 5G new radio (NR) base stations (gNBs) worldwide sheds light on electromagnetic field (EMF) measurements of gNB to assess human exposure. Over-the-air (OTA) measurement of gNBs is mandatory because 5G NR uses an active array antenna. Furthermore, it is well known that 5G NR provides various types of services such as enhanced mobile broadband (eMBB), ultra-reliable low-latency com- munications (URLLC), and massive machine-type communications (MTC). Therefore, in the case of 5G NR gNB, a reliable method of EMF measurement for each gNB is required because the traffic information varies greatly depending on the services provided, and many gNBs are installed in a hotspot area. Thus, EMF measurements involve the selection of the synchronization signal/physical broadcast channel (SS/PBCH) block, which is “always-on” and does not depend on traffic signals. In this study, we analyze the methods used to measure EMF for 5G NR, which involve the application of instruments such as a dedicated NR decoder or spectrum analyzer. Consequently, we assert that EMF measurement methods should be classified and implemented according to their evaluation purposes. In addition, we propose that the compliance for installing gNBs should be measured by using a dedicated NR decorder based on a secondary synchronization signal (SSS) that can not only increase the reliability of the measurement but also accurately measure the EMF exposure for each gNB.

참고문헌 (Reference)

1 "IMT Vision-Framework and Overall Objectives of the Future Development of IMT for 2020 and Beyond, Recommendation ITU-R M.2083-0"

2 "IEEE Standard for Safety Levels with Respect to Human Exposure to Electric, Magnetic, and Electromagnetic Fields, 0 Hz to 300 GHz, IEEE Std C95.1"

3 ICNIRP, "Guidelines for limiting exposure to electromagnetic fields(100 kHz to 300 GHz)" 118 (118): 483-524, 2020

4 M. Mike, "EMF Measurements in 5G NR" Rohde & Schwarz 2020

5 "Determination of RF Field Strength, Power Density and SAR in the Vicinity of Radiocommunication Base Stations for the Purpose of Evaluating Human Exposure, IEC 62232"

6 Sharetechnote, "5G/NR-SS block"

7 M. Kottkamp, "5G New Radio: Fundamentals, Procedures, Testing Aspects" Rhode & Scrwarz 2019

8 "5G NR: Physical Layer Procedures for Control, ETSI TS 138 213, version 15.6.0"

9 "5G NR: Physical Layer Measurements, ETSI TS 138215, version 15.2.0"

10 "5G NR: Physical Channels and Modulation, ETSI TS 138 211, version 15.2.0"