Earth Stations in Motion(ESIM, 이동형지구국) 시스템은 고정위성 업무 대역에서 이동 중에도 초고속 고용량 통신 서비스를 제공하기 위한 최신 위성통신시스템으로 여겨지고 있다. 글로벌 통신 서비스를 기반으로 Ka 대역을 이용하는 ESIM 시스템과 기존 업무와의 주파수 공유 및 보호를 위해 국제전기통신연합 전파통신 섹터(ITU-R)에서 관련된 표준화 연구를 수행하였다. 본 고에서는 특히 27.5~29.5GHz 대역 ESIM 송신으로부터 기존 업무를 보호하기 위한 주파수 공유 연구 동향 및 2019년 10월에 개최된 세계전파통신회의(WRC-19)에서 결정된 ESIM 운용 조건에 대해 분석한다.
KSP Keywords
International telecommunications union radiocommunication(ITU-R)
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