The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Efficient Resource Allocation to Support QoS in a Fixed Relay Based Cellular System

고정 릴레이 기반 셀룰러 시스템에서 QoS를 보장하기 위한 효율적인 자원 할당

  • Kim, Geun-Bae (Department of Electronics and Computer Engineering, Hanyang University) ;
  • Shin, Hee-Young (Mobile Communication Division, Samsung Electronics) ;
  • Park, Sang-Kyu (Department of Electronics and Computer Engineering, Hanyang University)
  • 김근배 (한양대학교 전자통신컴퓨터공학과) ;
  • 신희영 (삼성전자 무선사업부) ;
  • 박상규 (한양대학교 전자통신컴퓨터공학과)
  • Published : 2010.10.31
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Abstract

The relay based cellular system has been introduced to provide the service to satisfy the user requirement. The main reasons of using relay station are to expand a service coverage and to increase a system throughput with satisfying the service requirement level. This paper proposes a new resource allocation algorithm which supports the users' throughput fairness and service coverage in the Fixed Relay Based Cellular system with OFDMA. The performance of proposed algorithm is compared with the performances of proportional fairness(PF) algorithm. The simulation result shows that the proposed algorithm increases the number of active users in the service coverage while paying small amount of throughput loss.

릴레이 기반 셀룰러 시스템은 사용자의 요구를 충족시키는 서비스를 제공하기 위해 도입되었다. 릴레이 중계기를 사용하는 주된 요인은 서비스 영역 확장 및 요구 서비스를 만족시킬 수 있는 시스템 처리율 증가이다. 본 논문에서는 직교 주파수 분할 다중 접속(OFDMA: Orthogonal Frequency Division Multiple Access) 기술이 적용된 고정 릴레이(fixed relay) 기반 셀룰러 시스템에서 공평성을 고려한 효율적인 부반송파 할당 방안을 제시한다. 릴레이 중계기에 적합한 효율적인 자원 할당 방법을 통해서 사용자의 QoS를 보장할 수 있도록 하며, outage 확률 및 사용자 당 평균 데이터 처리율(throughput)의 관점에서 기존의 비례 공정 알고리즘(proportional fairness algorithm)과의 성능 비교를 통해 제시된 알고리즘의 유용성을 관찰한다.

Keywords

References

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