Resource Minimization for Hybrid ARQ System With Real-Time Traffic in Time-Correlated Rayleigh Fading Channels

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Most studies on Hybrid Automatic Repeat reQuest (HARQ) with respect to rate adaptation have been focused on throughput maximization. However, for real-time traffic, resource minimization is a more efficient rate adaptation method in OFDMA-based systems. Moreover, most previous work have dealt with either slow or fast fading channel although practical wireless channels typically exhibit a time-correlated property. In this paper, the authors analyze the outage probability and average resource usage of HARQ with rate adaptation in a time-correlated channel model.