The hand blockage effect of the human hand around the user equipment (UE) is too considerable to be ignored in frequency range 2 (FR2). This adds another layer of complexity to the link budget design in FR2 for 5G networks, which already suffer from high path and diffraction loss. More recently, multipanel UEs (MPUEs) have been proposed as a way to address this problem, whereby multiple distinct antenna panels are integrated into the UE body as a way to leverage gains from antenna directivity. MPUEs also enhance the Rx-beamforming gain because it is now subject to each individual antenna panel. In this paper, the mobility performance of hand blockage induced by three practical hand grips is analyzed in a system-level simulation, where in each grip both the UE orientation and the hand positioning around the UE is different. It is seen that each hand grip has a significant impact on mobility performance of the network, where in the worst case mobility failures increase by 43% compared to the non-hand blockage case. Moreover, a detailed analysis of the tradeoff between the mobility key performance indicators and the panel and Rx beam switching frequency is also studied. Results have shown that both the panel and Rx beam switches can be reduced considerably without compromising on the mobility performance. This is beneficial because it helps in reducing UE power consumption.

翻译：用户设备（UE）周围人手造成的手部遮挡效应在频率范围2（FR2）中影响显著，不可忽视。这为原本已面临高路径损耗与衍射损耗的5G网络FR2链路预算设计增加了额外复杂性。近期，多面板UE（MPUE）被提出作为解决该问题的方案，通过将多个独立天线面板集成至UE机体，利用天线方向性增益。MPUE还能增强接收波束成形增益，因其可依赖每个独立天线面板。本文通过系统级仿真，分析了三种实际手部握姿引发的手部遮挡的移动性能，其中每种握姿的UE朝向及手部环绕UE的位置均不同。结果表明，每种手部握姿对网络移动性能均有显著影响，在最差情况下，移动失败率相较于无手部遮挡场景增加43%。此外，本文还详细研究了移动性关键性能指标与面板及接收波束切换频率之间的权衡关系。结果显示，在不牺牲移动性能的前提下，面板与接收波束切换均可大幅减少。这有利于降低UE功耗，极具应用价值。