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 Pico Cell Range Expansion and Frequency Partitioning in Heterogeneous Network

Heterogeneous 네트워크에서 Pico 셀 범위 확장과 주파수 분할의 성능 평가

  • 굴홍량 (고려대학교 컴퓨터정보학과 BCN 연구실) ;
  • 김승연 (고려대학교 전자정보공학과 B-ISDN 연구실) ;
  • 류승완 (중앙대학교 정보시스템학과) ;
  • 조충호 (고려대학교 컴퓨터정보학과 BCN 연구실) ;
  • 이형우 (고려대학교 전자정보공학과 B-ISDN 연구실)
  • Received : 2012.05.30
  • Accepted : 2012.07.26
  • Published : 2012.08.31
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Abstract

In the presence of a high power cellular network, picocells are added to a Macro-cell layout aiming to enhance total system throughput from cell-splitting. While because of the different transmission power between macrocell and picocell, and co-channel interference challenges between the existing macrocell and the new low power node-picocell, these problems result in no substantive improvement to total system effective throughput. Some works have investigated on these problems. Pico Cell Range Expansion (CRE) technique tries to employ some methods (such as adding a bias for Pico cell RSRP) to drive to offload some UEs to camp on picocells. In this work, we propose two solution schemes (including cell selection method, channel allocation and serving process) and combine new adaptive frequency partitioning reuse scheme to improve the total system throughput. In the simulation, we evaluate the performances of heterogeneous networks for downlink transmission in terms of channel utilization per cell (pico and macro), call blocking probability, outage probability and effective throughput. The simulation results show that the call blocking probability and outage probability are reduced remarkably and the throughput is increased effectively.

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References

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