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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

A Cooperative Hybrid ARQ Scheme with Adaptive Retransmission

적응 재전송을 적용한 협력 하이브리드 ARQ 기법

  • 강성교 (경희대학교 전자전파공학과) ;
  • 왕진수 (경희대학교 전자전파공학과) ;
  • 김윤희 (경희대학교 전자전파공학과) ;
  • 송익호 (한국과학기술원 전자전산학과)
  • Published : 2009.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Cooperative diversity is a promising technique for range extension and diversity increase without the use of multiple transmit antennas at the user equipment. In this paper, we propose a cooperative hybrid automatic repeat request relay method with adaptive retransmission to increase the throughput when the SNR of a source user is low. In the proposed method, the source user transmits the first segment of a codeword to relay users and a base station. If the base station fails to recover the information from the received packet, it requests the source or some relay users to retransmit the packet previously sent. In addition, the retransmission type of a selected user is chosen from repetition or incremental redundancy according to the quality of systematic bits in a turbo codeword. Simulation results show that the proposed method improves the throughput compared to conventional methods, and the improvement is significant when the source user has a low SNR.

협력 다양성 기법은 기기마다 다중 송신 안테나를 쓰지 않고 전송 영역을 확장하거나 다양성 차수를 높일 수 있는 기술로 큰 관심을 얻고 있다. 본 논문에서는 원천 단말의 신호대잡음비가 낮을 때 전송률을 더욱 높이는 하이브리드 ARQ (Automatic Repeat reQuest) 릴레이 전송 기법을 제안한다. 제안 기법에서는 원천 단말이 기지국과 릴레이 단말에게 부호화 패킷을 전송하고, 재전송이 필요한 경우 기지국이 재전송 기법과 재전송 단말을 선택하다. 제안 기법에서는 터보 부호어의 정보 비트 수신 품질에 따라 반복 재전송과 패리티 증가 재전송 가운데 한 기법을 선택하며, 릴레이 단말의 채널 품질 정보가 있을 때 추가적으로 채널 상태가 가장 좋은 단말이 재전송하도록 한다. 모의실험 결과 제안한 방식은 원천 단말의 신호대잡음비가 낮을 때의 전송률을 크게 향상시킬 수 있음을 볼 수 있다.

Keywords

References

  1. G.J. Foschini and M.J. Gans, 'On limits of wireless communications in a fading environment when using multiple antennas,' Wireless Personal Commun., vol. 6, no. 3, pp. 311-335, Mar. 1998 https://doi.org/10.1023/A:1008889222784
  2. T.M. Cover and A.A.E. Gamal, 'Capacity theorems for the relay channel,' IEEE Trans. Inform. Theory, vol. 25, no. 5, pp. 1927-1948, Sept. 1979 https://doi.org/10.1109/TIT.1979.1056084
  3. B. Zhao and M.C. Valenti, 'Distributed turbo coded diversity for relay channel,' Electr. Letters, vol. 39, no. 10, pp. 786-787, May 2003 https://doi.org/10.1049/el:20030526
  4. A. Sendonaris, E. Erkip, and B. Aazhang, 'User cooperation diversity-Part I: System description,' IEEE Trans. Commun., vol. 51, no. 11, pp. 1927-1938, Nov. 2003 https://doi.org/10.1109/TCOMM.2003.818096
  5. A. Sendonaris, E. Erkip, and B. Aazhang, 'User cooperation diversity-Part II: Implementation aspects and performance analysis,' IEEE Trans. Commun., vol. 51, no. 11, pp. 1939-1948, Nov. 2003 https://doi.org/10.1109/TCOMM.2003.819238
  6. M. Janani, A. Hedayat, T.E. Hunter, and A. Nosratinia, 'Coded cooperation in wireless communications: space-time transmission and iterative decoding,' IEEE Trans. Sig. Process., vol. 52, no. 2, pp. 362-371, Feb. 2004 https://doi.org/10.1109/TSP.2003.821100
  7. A. Nosratinia, T.E. Hunter, and A. Hedayat, 'Cooperative communication in wireless networks,' IEEE Commun. Mag., vol. 42, no. 10, pp. 74-80, Oct. 2004 https://doi.org/10.1109/MCOM.2004.1341264
  8. J. N. Laneman, D. N. C. Tse, and G. W. Wornell, 'Cooperative diversity in wireless networks: efficient protocols and outage behavior,' IEEE Trans. Inf. Theory, vol. 50, pp. 3062-3080, Dec. 2004 https://doi.org/10.1109/TIT.2004.838089
  9. B. Zhao and MC. Valenti, 'Practical realy networks: a generalization of hybrid-ARQ' IEEE J. Select. Areas Commun., vol. 23, no. 1, pp. 7-18, Jan. 2005 https://doi.org/10.1109/JSAC.2004.837352
  10. T.E. Hunter and A. Nosratinia, 'Diversity through coded cooperation,"'IEEE Trans. Commun., vol. 5, no. 2, pp. 1-7, Feb. 2006 https://doi.org/10.1109/TWC.2006.1611050
  11. P. Frenger, S. Parkvall, and E. Dahlman, 'Performance comparison of HARQ with Chase combining and incremental redundancy for HSDPA,' Proc. IEEE VTC, pp. 1829–1833, Atlantic City, USA, Oct. 2001
  12. 3GPP2 C.S0002-C, v2.0, 'Physical layer standard for cdma2000 spread spectrum systems,' July 2004