Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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An Irregular Frequency Reuse Scheme for Cellular OFDMA Systems

셀룰러 OFDMA 시스템을 위한 불규칙적 주파수 재사용 방법

  • Kim, Young-Serk (Telecomm. R&D Center, Samsung Electronics) ;
  • Ryu, Chul (Department of Information and Communications Engineering, Dongguk University) ;
  • Rim, Min-Joong (Department of Information and Communications Engineering, Dongguk University)
  • 김용석 (삼성전자 통신연구소) ;
  • 류철 (동국대학교 정보통신공학과) ;
  • 임민중 (동국대학교 정보통신공학과)
  • Published : 2007.07.25
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Abstract

While conventional frequency reuse techniques for cellular communication systems divide frequency resources into multiple regions and each mobile is statically assigned to a certain frequency region, frequency reuse techniques for cellular OFDMA communication systems can be regarded as dynamic scheduling problems of finding best-fitted subcarriers for each packet transmission. Unlike conventional frequency reuse techniques allocating mutually exclusive frequency resources to adjacent cells, this paper proposes the use of a frequency reuse technique with irregular frequency allocation patterns assigned statically based on the cell numbers. This paper shows that the use of irregular frequency patterns can allow efficient interference avoidance and high data throughputs comparable to those with carefully planned frequency patterns.

전통적인 셀룰러 시스템에서의 주파수 재사용 방법은 주파수를 분할하고 특정 셀에 위치한 단말들을 특정 주파수 영역에 할당시키는 반면, OFDMA 시스템에서의 주파수 재사용은 스케줄링에 의해서 결정되는 부반송파 할당 문제로 볼 수 있다. 이 논문에서는 주파수 설계에 의해서 인접한 셀들이 배타적인 주파수를 사용하도록 하는 대신, 각 셀이 셀 번호에 따라서 정적으로 결정되는 불규칙적인 패턴을 가지는 주파수 영역을 사용하는 방법을 제안한다. 이 논문에서는 불규칙적인 주파수 할당 패턴을 사용하는 것이 계획적인 주파수 할당을 하는 것에 견줄 정도의 효과적인 간섭 회피와 높은 데이터 전송률을 얻는 것이 가능함을 보인다.

Keywords

References

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