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

  • 제37권5A호
  • /
  • Pages.339-347
  • /
  • 2012
  • /
  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지
DOI QR코드

DOI QR Code

OFDMA 펨토셀 환경에서 전력 제어를 이용한 동적 하향링크 자원관리 방법

Dynamic Downlink Resource Management of Femtocells Using Power Control in OFDMA Networks

  • 이상태 (성균관대학교 정보통신대학 전자전기공학부) ;
  • 안천수 (성균관대학교 정보통신대학 전자전기공학부) ;
  • 신지태 (성균관대학교 정보통신대학 전자전기공학부)
  • 투고 : 2012.01.20
  • 심사 : 2012.05.01
  • 발행 : 2012.05.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

최근에 실내 커버리지 확장 및 광대역 데이터 서비스를 위한 가정용 기지국인 펨토셀에 대한 연구가 활발하다. 펨토셀이 배치될 때, 기존에 있던 네트워크 상황 속에서 다양한 기술적인 문제들을 발생 시킬 수 있다. 본 논문에서는 OFDMA 시스템에서 펨토 - 매크로셀 간의 간섭 완화에 대하여 연구하였고, 동적인 하향링크 자원 관리 방법을 제안하였다. 펨토셀의 전송 파워를 매크로셀로부터 오는 신호의 세기에 기반을 두어서 선택하는 방법과 펨토셀 에게 할당 할 부반송파를 동적으로 관리하는 방식을 제안하였다. 이러한 방법으로 펨토셀과 매크로셀 사용자와의 간섭을 줄일 수 있다. 제안하는 방법은 수용율을 비롯한 여러 평가 지표로 성능을 검증하였다.

Femtocells as home base station for indoor coverage extension and wideband data service, have been studied with significant interests. When femtocell is deployed, the existing cell structural of changes causes various technical problems. In this paper, we investigate the femto-macro cell interference mitigation in OFDMA system. We propose dynamic downlink resource management scheme which adjust the transmitted power of femtocell according to the strength of received macrocell signal and allocates subcarrier to femtocells in a dynamic manner. In this way, the interference between the macrocell users and femtocells is reduced. The simulation results show that proposed scheme enhances both macrocell and femtocell throughputs.

키워드

참고문헌

  1. H. Lei, L. Zhang, X. Zhang, and D. Yang, "A Novel Multi-cell OFDMA System Structure Using Fractional Frequency Reuse," IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Sept. 2007.
  2. M. Assaad, "Optimal Fractional Frequency Reuse (FFR) in Multicellular OFDMA System," IEEE Vehicular Technology Conference (VTC), Sept. 2008.
  3. M. Rahman and H. Yanikomeroglu, "Enhancing Cell-Edge Performance: A Downlink Dynamic Interference Avoidance Scheme with Inter-Cell Coordination," IEEE Trans. on Wireless Communications, vol. 9, no.4, Apr. 2010.
  4. L. Liu, D. Qu, and T. Jiang "Dynamic Fractional Frequency Reuse based on Interference Avoidance Request for Downlink OFDMA Cellular Networks," ACM Int. Conf. on Wireless Communication and Mobile Computing (IWCMC), Jun. 2010.
  5. D. Lopez-Perez, G. Roche, A.Valcarce, A. Juttner, Jie Zhang, "Interference Avoidance and Dynamic Frequency Planning for WiMAX Femtocells Networks," IEEE Int. Conf. on Communication Systems (ICCS), Nov. 2008.
  6. H. Zeng, C. Zhu, and W. Chen, "System Performance of Self-Organizing Network Algorithm in WiMAX Femtocells," ACM Int. Conf. on Wireless Internet (WICON), Nov. 2008.
  7. 3GPP TR.25.820, "3G Home NodeB Study Item Technical Report," (Release 8), Sept. 2008.
  8. K. Han, Y. Choi, D. Kim, M. Na, S. Choi, and K. Han, "Optimization of femtocell network configuration under interference constraints," 7th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, Jun. 2009.
  9. M. E. Sahin, I. Guvenc, M.-R. Jeong, and H. Arslan, "Handling CCI and ICI in OFDMA femtocell networks through frequency scheduling," IEEE Trans. Consum. Electron., vol. 55, no. 4, pp. 1936-1944, Nov. 2009. https://doi.org/10.1109/TCE.2009.5373753
  10. H.-C. Lee, D.-C. Oh, and Y.-H. Lee, "Mitigation of inter-femtocel interference with adaptive fractional frequency reuse," IEEE International Conference on Communications (ICC), pp. 1-5, May 2010.
  11. T.Zahir, K.Arshad, A.Nakata, K. Moessner, "Interference Management in Femtocells," IEEE Communications Surveys & Tutorials, 2012 (to be appeared).
  12. D. Lopez-Perez, A. Valcarce, G. Roche, and J. Zhang, "OFDMA femtocells: A roadmap on interference avoidance," IEEE Communications Magazine, vol. 47, no. 9, pp.41-48, Sep. 2009.
  13. Y. Sun, R.P. Jover, and X. Wang, "Uplink Interference Mitigation for OFDMA Femtocell Networks," IEEE Transactions on Wireless Communications, vol. 11, no. 2, Feb. 2012.
  14. X. Li, L. Qian and D. Katraia, "Downlink Power Control in Co-Channel Macrocell Femtocell Overlay," IEEE information Sciences and Systems Conf., March 2009.
  15. D. I. Kim, Long le and E. Hossain, "Resource Allocation for Cognitive Radios in Dynamic Spectrum Access Environment," IEEE Cognitive Radio Oriented Wireless Neworks and Communications Conf., May 2008.
  16. V. Chandrasekhar, J.G Andrews, T. Muharemovic, Z. Shen and A. Gatherer, "Power Control in Two-Tier Femtocell Networks," IEEE Trans. On Wireless Commun., vol. 8, pp.4316-4328, 2009. https://doi.org/10.1109/TWC.2009.081386
  17. D. Lee, C. Xu, U. Mayekar, M. Mohile, "Frequency reuse factor vs. pathloss exponent and sectorization," IEEE MTT-S Symposium on Technologies for Wireless Applications Digest, 1997.
  18. H. Claussen, "Performance of Macro- and Co-channel Femtocells in a Hierarchical Cell Structure," IEEE Int. Sym. on Personal, Indoor and Mobile Radio Communications (PIMRC), 2007.
  19. T. Lee, H. Kim, J. P, and J. Shin, " An Efficient Resource Allocation in OFDMA Femtocells Networks," IEEE Vehicular Technology Conference (VTC), Sept. 2010.