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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Performance Evaluation of Interference Alignment Technique in Wireless LAN Environment

무선랜 환경에서 간섭정렬 기술의 성능 평가

  • Yoon, Seokhyun (Dankook University, School of Electronics and Electrical Eng.) ;
  • Shin, Won-Yong (Dankook University, Department of Mobile Communications System)
  • Received : 2016.10.01
  • Accepted : 2016.11.25
  • Published : 2016.11.30
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Abstract

In this paper, we consider the performance improvement that can be obtained with interference alignment (IA) technique applied to 802.11ac based multi-BSS WiFi service. To this end, we developed a system simulator consisting of a link-level PHY simulator, based on 802.11ac specification, and multi-BSS proportional-fair scheduler. Specifically, assuming perfect channel side information and synchronization of signals from multiple APs, we used a SLNR based interference alignment algorithm proposed in [13] and compared its performance with that of multiuser beamforming based time-sharing system. The performance was evaluated in terms of average throughput per BSS and 5% worst user throughput. The results show that 70 to 100% throughput gain can be obtained in this ideal scenario.

본 논문에서는 802.11.ac규격 기반의 WiFi 서비스에서 간섭정렬 알고리즘의 적용에 따른 성능 향상을 평가하기 위해 스케줄러를 연동한 물리계층 시뮬레이터를 구성하고 이를 이용하여 수행한 모의실험 결과를 제시한다. 특히, 완전한 채널정보을 가정하고 [13]에서 제안된 SLNR(Signal-to-Leakage-interference-and-Noise Ratio) 기반의 간섭 정렬 기술과 다중사용자 빔형성을 사용한 시간공유 기술을 비교하였고, 결과적으로, 비례공평 스케줄러 하에서 간섭정렬 기술이 시간 공유 기술 대비 70%~100% 정도의 수율 이득이 있음을 확인하였다.

Keywords

References

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