In this letter, we give the first attempt to reap the benefits of non-orthogonal multiple access (NOMA) incorporated in small cell networks (SCNs) with hybrid automatic repeat request (HARQ). The outage performance of the incorporated scheme NOMA-SCN is investigated thoroughly under Type I HARQ with and without storage. By using stochastic geometry, we derive closed-form outage probabilities of near and far NOMA users. Simulation results are shown to be completely agreeable with the theoretical analyses. Besides, the HARQ with storage achieves a better outage performance than that without storage in the NOMA-SCN.

中文翻译：

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具有 HARQ 的 NOMA 辅助小型蜂窝网络的中断性能

在这封信中，我们首次尝试利用混合自动重传请求 (HARQ) 来获得包含在小型蜂窝网络 (SCN) 中的非正交多址 (NOMA) 的好处。结合方案 NOMA-SCN 的中断性能在 I 型 HARQ 下有和没有存储的情况下进行了彻底调查。通过使用随机几何，我们推导出近和远 NOMA 用户的封闭形式中断概率。仿真结果表明与理论分析完全一致。此外，在 NOMA-SCN 中，有存储的 HARQ 比没有存储的 HARQ 实现了更好的中断性能。