论文标题
多细胞干扰的不规则重复插入aloha的性能分析
Performance Analysis of Irregular Repetition Slotted Aloha with Multi-Cell Interference
论文作者
论文摘要
不规则的重复插入了Aloha（IRSA）是一个庞大的随机访问协议，其中用户将其数据包的多个复制品传输到框架上。现有的研究已经分析了单细胞（SC）设置中的IRSA，由于细胞间干扰，该设置并未扩展到更实际相关的多细胞（MC）设置。在这项工作中，我们分析了MC IRSA，考虑了试点污染和多源干扰。通过数值模拟，我们说明，在实际情况下，与SC IRSA相比，MC IRSA可能会巨大的吞吐量损失，最高$ 70 \％$。此外，MC IRSA需要更高的训练长度（与SC IRSA相比约为4-5倍），以支持相同的用户密度并实现相同的吞吐量。我们还提供了有关试验长度，天线数量以及信号比率对MC IRSA性能的影响的见解。
Irregular repetition slotted aloha (IRSA) is a massive random access protocol in which users transmit several replicas of their packet over a frame to a base station. Existing studies have analyzed IRSA in the single-cell (SC) setup, which does not extend to the more practically relevant multi-cell (MC) setup due to the inter-cell interference. In this work, we analyze MC IRSA, accounting for pilot contamination and multiuser interference. Via numerical simulations, we illustrate that, in practical settings, MC IRSA can have a drastic loss of throughput, up to $70\%$, compared to SC IRSA. Further, MC IRSA requires a significantly higher training length (about 4-5x compared to SC IRSA), in order to support the same user density and achieve the same throughput. We also provide insights into the impact of the pilot length, number of antennas, and signal to noise ratio on the performance of MC IRSA.
