• Title/Summary/Keyword: Truncated HARQ

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Cross-Layer Combining of Adaptive Wireless Multicast Transmission with Truncated HARQ (적응 무선 멀티캐스트 전송과 차단 하이브리드 자동 재전송 기법의 계층간 결합)

  • Do, Tan Tai;Park, Jae-Cheol;Kim, Yun-Hee;Song, Iick-Ho
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.34 no.8A
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    • pp.610-617
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    • 2009
  • This paper proposes a cross-layer design combining adaptive modulation and coding (AMC) with truncated hybrid automatic repeat request (HARQ) for wireless multicast transmission, in order to increase the spectral efficiency while meeting the target quality-of-service (QoS). In the design, we provide the selection criterion of AMC so as to satisfy the target packet error rate (PER) of all users when the multicast data is received through the common channel and the number of retransmission is limited by the delay constraint of the service. The analytically derived results show that the cross-layer design using HARQ provides a better spectral efficiency than the AMC without HARQ by allowing retransmission and code combining. It is also observed that the design for multicast outperforms that for unicast in the mid to high signal-to-noise ratio region.