论文标题
可扩展的无细胞大规模MIMO的迁移率性能分析
Mobility Performance Analysis of Scalable Cell-Free Massive MIMO
论文作者
论文摘要
虽然无细胞的大规模MIMO（CF-MIMO）在静态条件下显示出优势，但尚未解决其在移动网络中设置的不断变化的服务接入点（AP）的影响。在本文中，我们首先得出可扩展CF-MIMO的CPU群集和AP切换速率，作为精确的数值结果和紧密的闭合形式近似值。然后，我们使用封闭形式的交换率结果来分析移动性吸引的吞吐量。我们比较了具有纯网络和以UE为中心的AP选择的分布式MIMO的可伸缩CF-MIMO的移动性光谱效率（SE），以进行不同的AP密度和切换延迟。我们的结果表明，对于低控制延迟的未来密集网络的重要权衡：在中度到高的移动性下，可伸缩的CF-Mimo对95个百分点用户保持了优势，但以退化的中位数SE为代价。
While scalable cell-free massive MIMO (CF-mMIMO) shows advantages in static conditions, the impact of its changing serving access point (AP) set in a mobile network is not yet addressed. In this paper we first derive the CPU cluster and AP handover rates of scalable CF-mMIMO as exact numerical results and tight closed form approximations. We then use our closed form handover rate result to analyse the mobility-aware throughput. We compare the mobility-aware spectral efficiency (SE) of scalable CF-mMIMO against distributed MIMO with pure network- and UE-centric AP selection, for different AP densities and handover delays. Our results reveal an important trade-off for future dense networks with low control delay: under moderate to high mobility, scalable CF-mMIMO maintains its advantage for the 95th-percentile users but at the cost of degraded median SE.
