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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Joint Spatial Division and Reuse for Maximizing Network Throughput in Densely-Deployed Massive MIMO WLANs

고밀집 환경에서 대용량 MIMO WLAN의 네트워크 용량 최대화를 위한 결합 공간 분할 및 재사용 기법

  • Choi, Kyung Jun (School of Electrical & Electronic Engineering, Yonsei University) ;
  • Kim, Kyung Jun (School of Electrical & Electronic Engineering, Yonsei University) ;
  • Kim, Kwang Soon (School of Electrical & Electronic Engineering, Yonsei University)
  • Received : 2015.03.09
  • Accepted : 2015.03.25
  • Published : 2015.03.31
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Abstract

In this paper, joint spatial division and reuse (JSDR) scheme is proposed for maximizing network throughput in densely-deployed wireless local area networks equipped with massive antenna array. The proposed JSDR scheme divides the massive spatial space into two subspaces: one is for suppressing the interference from the neighboring access points and another is for sensing the carrier sensing and transmitting the information-bearing signals to intended stations. By using computer simulation, the proposed JSDR can provide 133% higher network throughput, compared to the carrier sensing technique defined in the IEEE 802.11 standard so that the proposed JSDR is suitable for the next generation WLAN systems.

본 논문에서는 고밀집 환경에서 대용량 MIMO가 장착된 무선랜 시스템의 효율을 높이기 위한 방식으로 결합공간 분할 및 재사용 기법을 제안한다. 제안한 기법은 다중 안테나로 생성할 수 있는 공간 자원을 간섭을 미리 억제하는데 사용하는 공간 자원과 캐리어 센싱 및 전송을 하는데 이용하는 공간 자원으로 분리한다. 분리된 공간자원의 양에 따라 다른 캐리어 센싱 한계값을 할당하여, 해당 공간 자원으로의 전송 여부를 결정한다. 이 방식은 공간 분할 (spatial division) 최적화 문제와 공간 재사용 (spatial reuse) 최적화 문제를 동시에 고려해 네트워크의 전송 용량을 최대화한다. 시뮬레이션을 통해 제안한 기법이 IEEE 802.11에서 정의된 캐리어 센싱 기법보다 네트워크의 용량을 133% 증가시키므로 차세대 무선랜 시스템에 적용하여 사용자에게 우수한 전송 품질을 제공해 줄 수 있음을 보인다.

Keywords

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