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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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User Selection Method of Subspace Interference Alignment in Multi-cell Uplink Systems

다중 셀 상향링크에서 부분공간 간섭 정렬의 사용자 선택 방법

  • 서종필 (인하대학교 전자공학과 무선이동통신 연구실) ;
  • 김현수 (인하대학교 전자공학과 무선이동통신 연구실) ;
  • 안재진 (인하대학교 전자공학과 무선이동통신 연구실) ;
  • 정재학 (인하대학교 전자공학과 무선이동통신 연구실)
  • Received : 2010.02.04
  • Accepted : 2010.03.08
  • Published : 2010.03.31
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Abstract

We propose a user selection method in multi-cell multiuser uplink system with the subspace interference alignment to maintain the high sum-rate capacity. The proposed method selects users whose interference to adjacent cells are strong and apply the subspace interference alignment to the users. The proposed method provides that the number of users performing the interference alignment reduces and the high total sum-rate is maintained. Simulation results exhibit the proposed method reduces the number of users who would decompose the channel for the subspace interference alignment by 50% when the required sum-rate is 90% of the maximal achievable sum-rate.

본 논문에서는 다중 셀 다중 사용자 시스템에서 상향링크시 셀 간 간섭을 완화시키기 위한 부분공간 간섭 정렬을 적용했을 때 높은 합용량을 유지하기 위한 사용자 선택 방법을 제안하였다. 제안된 방법은 각 사용자가 인접 셀에 미치는 간섭이 큰 사용자를 선택하고 간섭 정렬을 적용함으로써 간섭 정렬을 하는 사용자 수를 줄이는 동시에 높은 합용량을 유지시킨다. 전산 모의 실험을 통해 전체 합용량을 달성 가능한 최대 합용량의 90%로 설정했을 때 부분공간 간섭 정렬을 위해 채널을 분해 하는 사용자 수가 50%이상 감소하는 것을 확인하였다.

Keywords

References

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