Electronics and Telecommunications Trends (전자통신동향분석)

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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ITU-R Study on Frequency Sharing for Mobile Satellite Services

ITU-R의 이동위성업무 주파수 공유 연구 현황

  • B.J. Ku ;
  • D.S. Oh
  • 구본준 (위성광역인프라연구실 ) ;
  • 오대섭 (위성광역인프라연구실 )
  • Published : 2023.02.01
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Abstract

Recently, preparations for 6G have led to the increasing interest in integrated or hybrid communication networks considering low-orbit satellite communication networks with terrestrial mobile communication networks. In addition, the demand for frequency allocation for new mobile services from low-orbit small satellites to provide global internet of things (IoT) services is increasing. The operation of such satellites and terrestrial mobile communication networks may inevitably cause interference in adjacent bands and the same band frequency between satellites and terrestrial systems. Focusing on the results of the recent ITU-R WP4C meeting, this study introduces the current status of frequency sharing and interference issues between satellites and terrestrial systems, and frequency allocation issues for new mobile satellite operations. Coexistence and compatibility studies with terrestrial IMT in L band and 2.6 GHz band, operated by Inmassat and India, respectively, and a new frequency allocation study (WRC-23 AI 1.18) are carried out to reflect satellite IoT demand. For the L band, technical requirements have been developed for emission from IMT devices at 1,492 MHz to 1,518 MHz to bands above 1,518 MHz. Related studies in the 2 GHz and 2.6 GHz bands are not discussed due to lack of contributions at the recent meeting. In particular, concerning the WRC-23 agenda 1.18 study on the new frequency allocation method of narrowband mobile satellite work in the Region 1 candidate band 2,010 MHz to 2,025 MHz, Region 2 candidate bands 1,695 MHz to 1,710 MHz, 3,300 MHz to 3,315 MHz, and 3,385 MHz to 3,400 MHz, ITU-R results show no new frequency allocation to narrow mobile satellite services. Given the expected various collaborations between satellites and the terrestrial component are in the future, interference issues between terrestrial IMT and mobile satellite services are similarly expected to continuously increase. Therefore, participation in related studies at ITU-R WP4C and active response to protect terrestrial IMT are necessary to protect domestic radio resources and secure additional frequencies reflecting satellite service use plans.

Keywords

Acknowledgement

본 연구는 2022년도 과학기술정보통신부의 재원으로 정보통신기획평가원의 지원을 받아 수행된 연구임[2021-0-00719, 비정지궤도 위성망 주파수 간섭평가/공유기술 개발].

References

  1. ITU-R Resolution 223 (REV.WRC-19). 
  2. ITU-R Resolution 212 (REV.WRC-19). 
  3. ITU-R Resolution 225 (REV.WRC-12). 
  4. ITU-R Resolution 248 (WRC-19). 
  5. 3GPP, TS 36.101: Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception (Release 14) 
  6. 3GPP TS 38.101-1 NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone. 
  7. 대한민국 주파수 분배표, 2020년. 
  8. 전파누리, https://spectrummap.kr/ 
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  11. 구본준 외, "ITU-R의 협대역 이동위성업무를 위한 주파수 분배 연구 현황," 전자통신동향분석, 제36권 제6호, 2021, pp. 36-45.  https://doi.org/10.22648/ETRI.2021.J.360604
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