한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

  • 제38B권4호
  • /
  • Pages.240-246
  • /
  • 2013
  • /
  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
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이종 네트워크를 위한 Almost Blank Subframes의 성능 분석

Analytical Evaluation of Almost Blank Subframes for Heterogeneous Networks

  • 김승연 (고려대학교 전자정보공학과 B-ISDN 연구실) ;
  • 이형우 (고려대학교 전자정보공학과 B-ISDN 연구실) ;
  • 류승완 (중앙대학교 정보시스템학과)
  • 투고 : 2012.12.26
  • 심사 : 2013.03.26
  • 발행 : 2013.04.30
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초록

이종 네트워크 환경에서 이종셀 간 간섭 제어를 위해 Almost Blank Subframes (ABS)이 제안 되었다. ABS에서는 서브프레임에 대한 자원 할당을 하지 않음으로써 동일 채널 간섭을 줄일 수 있다. 기존 연구에서는 ABS 기술의 성능 평가를 위한 수학적 모델링이 제안되지 않았다. 본 논문에서는 ABS 기술에 대한 수학적 모델을 제시하였다. 분석을 위한 가정에서 OFDMA 기반의 다중 반송파 (multi carrier) 시스템을 가정하였고, large-scale 페이딩을 가정하였다. 성능 평가로써 effective SINR에 대한 누적분포함수를 나타낸다. 시뮬레이션과 분석에 대한 결과 비교를 통해 수학적 모델에 대한 정확도를 보인다.

In heterogeneous networks, the almost blank subframes (ABS) for inter-cell interference coordination (ICIC), which can be protected from the CCI due to unutilized subframes (i.e., ABS) is proposed. However, the analytical model for ABS-based systems has not been fully studied yet. In this paper, we derive a new analytical model to evaluate the performance of ABS-based systems. In an analytic model, we assume that each carrier in multicarrier systems, such as in OFDMA, is subject to large-scale fading, which is independent of other carriers. As a performance measure, we present the cumulative distribution function (CDF) for the effective SINR. We show the accuracy of the analytical model via simulation results.

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참고문헌

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