A Cooperative Hybrid ARQ Scheme with Adaptive Retransmission 


Vol. 34,  No. 3, pp. 213-220, Mar.  2009


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  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.

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  Cite this article

[IEEE Style]

S. K. Kang, J. S. Wang, Y. H. Kim, I. Song, "A Cooperative Hybrid ARQ Scheme with Adaptive Retransmission," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 213-220, 2009. DOI: .

[ACM Style]

Seong Kyo Kang, Jin Soo Wang, Yun Hee Kim, and Iickho Song. 2009. A Cooperative Hybrid ARQ Scheme with Adaptive Retransmission. The Journal of Korean Institute of Communications and Information Sciences, 34, 3, (2009), 213-220. DOI: .

[KICS Style]

Seong Kyo Kang, Jin Soo Wang, Yun Hee Kim, Iickho Song, "A Cooperative Hybrid ARQ Scheme with Adaptive Retransmission," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 213-220, 3. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880