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Throughput Maximization by Efficient Subcarrier Allocation in an OFDMA-based CR Network

OFDMA 기반 CR 네트워크에서 효율적인 부반송파 할당을 통한 시스템 용량 극대화 방안

  • 박재현 (인하대학교 정보공학과 무선통신 연구실) ;
  • 유정민 (인하대학교 정보공학과 무선통신 연구실) ;
  • 김덕경 (인하대학교 정보공학과 무선통신 연구실)
  • Received : 2010.07.05
  • Accepted : 2011.01.27
  • Published : 2011.02.28

Abstract

Recently, cognitive radio attracts lots of interest to effectively utilize the limited spectral resource. In the previous researches, we proposed a method to enhance the system capacity of the overall network by using Selfish Symbiotic architecture and Non-selfish Symbiotic architecture. In this research, we further enhance the previous works to OFDM-based CR networks by using efficient subchannel allocation. The system performance is evaluated through intensive simulations with multiple primary users as well as a single primary user with different numbers of CR users.

최근 주파수 지원의 효율적 사용에 대한 관심이 높아짐에 따라 Cognitive Radio가 활발히 연구되고 있다. 기존에는 Cognitive Radio의 이기적 공생방식과 비이기적 공생방식을 이용하여 시스템 용량을 향상하는 방안이 제안되었다. 이에 본 연구에서는 OFDMA 기반의 CR 네트워크에서 효율적인 부반송파 할당을 통한 시스템 용량 극대화를 제안한다. 또한 하나의 Primary 사용자가 존재하는 네트워크를 다수의 Primary 사용자가 존재하는 네트워크로 확장하여 극대화 방안을 적용하는 방안과 그 영향을 분석한다.

Keywords

References

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