Cross-layer Design for Adaptive Modulation and Coding with Hybrid ARQ

An important aspect of wireless networks is the dynamic behavior, cross-layer design is the central technique to cope with and utilize this behavior. In this paper, we present the cross-layer design for adaptive modulation and coding (AMC) with HARQ. For each of two widely used HARQ techniques-chase combining and incremental redundancy, the close-form functions of average retransmission time, average delay and average throughput are derived for a specific modulation and coding scheme (MCS). Based on the derived functions, a novel MCS selection method is proposed. Meanwhile, we give the analysis of how many retransmission is needed.