한국위성정보통신학회논문지 (Journal of Satellite, Information and Communications)

한국위성정보통신학회 (Korea Society of Satellite Technology)
권호 표지

DVB-S2/RCS-2 ACM 운용 환경에서의 네트워크 동기 및 NCR 복원

Network Synchronization and NCR Recovery for ACM Mode for DVB-S2/RCS2

  • 전한익 (과학기술연합대학원대학교 이동통신 및 디지털방송공학과) ;
  • 오덕길 (한국전자통신연구원 위성광대역방송통신 연구실)
  • 투고 : 2015.05.29
  • 심사 : 2015.06.26
  • 발행 : 2015.06.30
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⟨ 이전 논문 다음 논문 ⟩

초록

일반적으로 TDMA(Time Division Multiple Access)를 기반으로 하는 양방향 위성 통신 시스템에서는 중심국과 멀리 떨어진 단말국간의 네트워크 동기를 필요로 한다. 본 논문은 양방향 위성시스템을 위한 국제규격인 DVB-S2/RCS2에서 제시한 NCR(Network Clock Reference) 복원 구조를 기반으로 네트워크 클럭 동기에 대한 개념을 설명한다. 또한 DVB-S2에서 CCM(Constant Coding & Modulation) 운용 모드와 부호율, 변조방식을 바꿔 throughput을 최적화 하는 ACM(Adaptive Coding & Modulation) 운용 모드를 지원하는 새로운 NCR 삽입 구조를 제안하였으며 이에 대한 시뮬레이션을 통해 타당성을 검증하였다.

In general, two way satellite communication systems based on TDMA(Time Division Multiple Access) require network clock synchronization between hub station and remote terminals. This paper describes basic concepts for network clock synchronization based on NCR(Network Clock Reference) clock recovery scheme as suggested in DVB-S2/ RCS2 international standards. in addition, a new NCR insertion method has been proposed and evaluated in terms of supporting CCM mode as well as ACM mode which optimizes throughput by changing code rates and modulation types ranging from QPSK to 32-APSK.

키워드

참고문헌

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