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

  • 제37권8A호
  • /
  • Pages.601-611
  • /
  • 2012
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  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
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상호 간섭 Broadcast 채널을 위한 MIMO 간섭 정렬을 이용한 복잡도를 줄인 스케쥴링

Reduced Complexity Scheduling Method with MIMO Interference Alignment for Mutually Interfering Broadcast Channels

  • 박해욱 (고려대학교 전기전자전파공학부 무선통신 연구실) ;
  • 박석환 ;
  • 성학제 (삼성전자 무선 사업부) ;
  • 이인규 (고려대학교 전기전자전파공학부 무선통신 연구실)
  • 투고 : 2011.08.23
  • 심사 : 2012.07.12
  • 발행 : 2012.08.31
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초록

본 논문에서는, 다중 안테나 다중 사용자가 존재하는 3-cell 간섭 Broadcast 채널 (IFBC: interference broadcast channel) 에서 얻을 수 있는 공간 다중화 이득 (spatial multiplexing gain)에 대해서 소개한다. 이러한 공간 다중화 이득을 최대화하면서 총 수율을 높이기 위하여, 우리는 간섭 정렬 기법 (IA: interference alignment)에 스케쥴링 기법을 더한 방법을 제안하며, 이는 IFBC 환경에서 TDMA 기법보다 높은 수율 성능을 보인다. 최적의 스케쥴링 방법은 다중 사용자 이득을 이용하여 총 수율을 최대화하는 전수 조사 알고리즘을 이용한다. 또한, 전수 조사의 계산 복잡도가 매우 높기 때문에, 이를 효과적으로 줄이는 coordinated ascent 방법을 이용한 부최적 스케쥴링 방법도 제안 한다.

In this paper, we first study the spatial multiplexing gain for the 3-cell interfering broadcast channels (IFBC) where all base stations and mobile users are equipped with multiple antennas. Then, we present the IA scheme in conjunction with user selection which outperforms the TDMA technique in the IFBC environment. The optimal scheduling method utilizes multiuser diversity to achieve a significant fraction of sum capacity by using an exhaustive search algorithm. To reduce the computational complexity, a suboptimal scheduling method is proposed based on a coordinate ascent approach.

키워드

참고문헌

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