Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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A Study on Application of DSS for enhancing 5G Coverage

5G 커버리지 개선을 위한 DSS 적용 방안 연구

  • Seong-Gyoon, Park (Dept. of Radio Science & Engineering, Kong-Ju National University) ;
  • Soong-Hwan, Ro (Dept. of Radio Science & Engineering, Kong-Ju National University)
  • Received : 2022.12.12
  • Accepted : 2022.12.26
  • Published : 2022.12.31
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Abstract

5G service uses mid-band (n78) than existing mobile communication frequencies, so it is necessary to improve 5G coverage by utilizing low-band frequencies below 2 GHz. To this end, the application of Dynamic Spectrum Sharing technology of LTE and 5G-NR system using most of the low-band frequencies is required. In this paper, signaling overhead factors for DSS application and RF issues for terminal implementation are derived, and signaling overhead ratios from the respective perspectives of 5G-NR and LTE for the 1.8GHz band (50MHz width) that can utilize wide-bandwidth among low-band frequencies are estimated. Also handset RF issues were analyzed. Based on the analysis results, if DSS technology using low band is applied, it is expected that excellent 5G service quality can be provided due to 5G coverage improvement when LTE traffic quickly migrates to 5G-NR.

5G 서비스는 기존 이동통신주파수보다 상대적으로 높은 중대역(n78)을 사용하고 있어서 2GHz 이하의 저대역 주파수를 활용하여 5G 커버리지 개선이 필요하다. 이를 위해서는 저대역 주파수의 대부분을 사용하는 LTE와 5G-NR 시스템의 동적 스펙트럼 공유(Dynamic Spectrum Sharing) 기술의 적용이 요구된다. 본 논문에서는 DSS 적용을 위한 시그널링 오버헤드 요소와 단말기 구현 RF 이슈들을 도출하고, 저대역 주파수 중 광대역 주파수 활용이 가능한 1.8GHz 대역(50MHz 폭)에 대해 5G-NR과 LTE 각각의 관점에서 시그널링 오버헤드 비율과 단말기 RF 이슈들을 분석하였다. 분석 결과들을 통해 저대역을 활용한 DSS 기술을 적용한다면 LTE 트래픽이 5G-NR로 빠르게 이전할 경우, 5G 커버리지 개선으로 인해 우수한 서비스 품질을 제공할 수 있을 것으로 예상된다.

Keywords

References

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