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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Analysis on Interference Control in Heterogeneous Networks

이기종 네트워크에서의 간섭 제어 분석

  • 김성의 (경희대학교 전자전파공학과 이동통신 연구실) ;
  • 김기수 (경희대학교 전자전파공학과 이동통신 연구실) ;
  • 홍인기 (경희대학교 전자전파공학과 이동통신 연구실)
  • Received : 2012.12.12
  • Accepted : 2013.02.21
  • Published : 2013.03.29
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Abstract

In this paper, we introduce the technologies to handle the interference in the heterogeneous network and evaluate the performance of enhanced Inter-Cell Interference Coordination (enhanced ICIC, eICIC) techniques that are being introduced in 3GPP Release 10. In the time-domain eICIC scheme, time-domain resources are scheduled to avoid the interference by using Almost Blank Subframe (ABS) and Cell Range Expansion (CRE). To mitigate the cross-tier interference between macro and femtocell, it is important to efficiently combine the ABS and CRE in heterogeneous network. Since it is hard to evaluate the total throughput of heterogeneous network numerically, we evaluate the total throughput by using system level simulation (SLS). As a result of evaluation, the throughputs of many different cases of combination of ABS and CRE are compared.

본 연구에서는 Heterogeneous Network에서의 간섭제어에 관한 기술 동향을 살펴보고, 간섭 제어 기술 중 3GPP release 10에서의 주요 기술 enhanced Inter-Cell Interference Coordination (enhanced ICIC, eICIC)을 택하여 성능을 분석해 보았다. eICIC기술 중 시간영역에서의 간섭 제어인 Almost Blank Subframe (ABS)와 Cell Range Expansion (CRE) 기술에 의한 성능을 분석하였다. Heterogeneous Network에서 macrocell과 femtocell 간의 간섭 제어를 적절히 하기 위해서는 ABS기술과 CRE 기술 간의 조합이 중요할 것으로 보인다. Heterogeneous Network의 전체 성능 평가는 정량적으로는 분석되기 어려워 system level simulation에 의해서 평가하였다. 본 연구에서는 SLS 방식으로 다양한 환경에 대한 성능을 분석함으로써 Heterogeneous Network 운영에 있어 각각의 요소가 미치는 영향을 파악할 수 있도록 하였으며, Heterogeneous Network에서의 ABS와 CRE의 결합에 의한 효과를 분석하였다.

Keywords

References

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