Hybrid Automatic ReQuest (HARQ) protocol enables reliable communications in wireless systems. Usually, several parallel streams are sent in successive timeslots following a time-sharing approach. Recently, multi-layer HARQ has been proposed by superposing packets within a timeslot. In this paper, we evaluate the potential of this multi-layer HARQ by playing with some design parameters. We show that a gain in throughput is only obtained at mid-Signal-to-Noise Ratio (SNR).

中文翻译：

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多消息重传方案分析

混合自动请求 (HARQ) 协议支持无线系统中的可靠通信。通常，按照分时方法在连续的时隙中发送多个并行流。最近，已经提出通过在时隙内叠加分组的多层HARQ。在本文中，我们通过使用一些设计参数来评估这种多层 HARQ 的潜力。我们表明，只有在中等信噪比 (SNR) 下才能获得吞吐量增益。