Although frequency range 2 (FR2) systems are an essential part of 5G-Advanced and future 3GPP releases, the mobility performance of multi-panel user equipment (MPUE) with hand blockage is still an area open for research and standardization. In this article, a comprehensive study on the mobility performance of MPUE with hand blockage is performed for conditional handover (CHO) and its potential enhancement denoted by fast conditional handover (FCHO). In contrast to CHO, in FCHO the MPUE can reuse earlier target cell preparations after each handover to autonomously execute subsequent handovers. This saves both the signaling overhead associated with the reconfiguration and re-preparation of target cells after each handover and reduces mobility failures. Results have shown that FCHO offers considerable mobility performance gains as compared to CHO for different hand blockage cases that are dependent on the hand position around the MPUE. For the worst-case hand blockage scenario, it is seen that mobility failures reduce by 10.5% and 19.3% for the 60 km/h and 120 km/h mobility scenarios, respectively. This gain comes at the expense of reserving the handover resources of an MPUE for a longer time given that the target cell configurations are not necessarily released after each handover. In this article, the longer resource reservation problem in FCHO is analysed and three different resource reservation optimization techniques are introduced. Results have shown that these optimization techniques not only reduce the resource reservation time but also significantly reduce the signaling overhead at the possible expense of a tolerable degradation in mobility performance.
翻译:虽然频率范围2(FR2)系统是5G-高级和今后3GPP释放的5G-高级和今后3GPP系统的重要部分,但多层用户设备(MPUE)的移动性能仍是一个可供研究和标准化的领域,在本条中,对多层用户设备(MPUE)的移动性能进行一项全面研究,以有条件的移交(CHO)及其潜在的增强,以快速有条件的移交(FCHO)为标志。与CHO不同,在FHO中,MPUE可以在每次移交后自动实施交接后重新利用早期目标单位的间接成本准备。这既节省了每次移交后目标单位重新配置和重新配置目标单位的信号性能,也减少了移动性能的信号性能。结果显示,与CHO相比,与C相比,在有条件交接(CHO)不同的情况下,移动性能业绩业绩的提高幅度相当大,因为FUE公司在每次交接后将资源保留得更长时间。</s>