Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Clustering based Novel Interference Management Scheme in Dense Small Cell Network

밀집한 소형셀 네트워크에서 클러스터링 기반 새로운 간섭 관리 기법

  • Moon, Sangmi (School of Electronics & Computer Engineering Chonnam National University) ;
  • Chu, Myeonghun (School of Electronics & Computer Engineering Chonnam National University) ;
  • Lee, Jihye (School of Electronics & Computer Engineering Chonnam National University) ;
  • Kwon, Soonho (School of Electronics & Computer Engineering Chonnam National University) ;
  • Kim, Hanjong (School of Electrical, Electronics & Communication Engineering, Korea University of Technology and Education) ;
  • Kim, Daejin (School of Electronics & Computer Engineering Chonnam National University) ;
  • Hwang, Intae (School of Electronics & Computer Engineering Chonnam National University)
  • 문상미 (전남대학교 전자컴퓨터공학과) ;
  • 추명훈 (전남대학교 전자컴퓨터공학과) ;
  • 이지혜 (전남대학교 전자컴퓨터공학과) ;
  • 권순호 (전남대학교 전자컴퓨터공학과) ;
  • 김한종 (한국기술교육대학 정보기술공학부) ;
  • 김대진 (전남대학교 전자컴퓨터공학과) ;
  • 황인태 (전남대학교 전자컴퓨터공학과)
  • Received : 2016.03.24
  • Accepted : 2016.05.10
  • Published : 2016.05.25
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Abstract

In Long Term Evolution-Advanced (LTE-A), small cell enhancement(SCE) has been developed as a cost-effective way of supporting exponentially increasing demand of wireless data services and satisfying the user quality of service(QoS). However, there are many problems such as the transmission rate and transmission quality degradation due to the dense and irregular distribution of a large number of small cells. In this paper, we propose a clustering based interference management scheme in dense small cell network. We divide the small cells into different clusters according to the reference signal received power(RSRP) from user equipment(UE). Within a cluster, an almost blank subframe(ABS) is implemented to mitigate interference between the small cells. In addition, we apply the power control to reduce the interference between the clusters. Simulation results show that proposed scheme can improve Signal to Interference plus Noise Ratio(SINR), throughput, and spectral efficiency of small cell users. Eventually, proposed scheme can improve overall cell performance.

LTE-A(Long Term Evolution-Advanced)에서는 비용 효율적 방법으로 급증하는 무선 데이터 서비스를 대처하고 사용자의 QoS(Quality of Service)를 만족시키기 위해 SCE(Small Cell Enhancement)에 대한 연구가 활발히 진행되고 있다. 하지만 수많은 소형셀이 밀집하여 불규칙하게 배치되기 때문에 전송품질 저하 등 많은 문제가 발생하게 된다. 본 논문에서는 밀집한 소형셀 네트워크에서 클러스터링 기반 간섭 관리 기법을 제안한다. 제안 기법은 UE(User Equipment)로부터 받은 RSRP(Reference Signal Received Power)를 비교하여 소형셀의 클러스터를 구성한다. 클러스터 내에서 ABS를 적용하여 소형셀 간 간섭을 완화시킨다. 또한, 전력제어를 적용하여 클러스터 간 간섭을 줄인다. 모의실험 결과, 제안한 기법에서 소형셀 사용자의 SINR(Signal to Interference plus Noise Ratio), 전송률 및 스펙트럼 효율이 향상되어 전체적인 셀 성능이 향상 되는 것을 볼 수 있다.

Keywords

References

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