论文标题
关于5G加速的快速条件切换的建模和分析
On the Modeling and Analysis of Fast Conditional Handover for 5G-Advanced
论文作者
论文摘要
条件切换（CHO）是5G网络中使用的最先进的3GPP切换机制。尽管它通过减少移动性失败来提高移动性鲁棒性，但CHO中移交制备和执行阶段的解耦可显着增加信号传导开销。对于5G高级网络，Fast CHO（FCHO）是最近的3GPP建议，它提供了一个实用的解决方案，在该解决方案中，用户设备（UE）可以在每次移交后自主执行后续移交后可以重复使用较早的目标单元格。这样可以节省与每次移交后目标单元重新配置和甲型相关的信号开销。在本文中，对FCHO在移动性故障和频率范围2（FR2）中的信号传导方面的迁移率性能进行了全面研究。特别是，将FCHO的性能与CHO的CHO进行了比较。结果表明，FCHO大大减少了CHO的信号传导开销，而同时，由于节省准备延迟而实现的移交速度更快，因此它还降低了移动性故障。
Conditional handover (CHO) is a state-of-the-art 3GPP handover mechanism used in 5G networks. Although it improves mobility robustness by reducing mobility failures, the decoupling of the handover preparation and execution phases in CHO significantly increases the signaling overhead. For 5G-Advanced networks, fast CHO (FCHO) is a recent 3GPP proposal that offers a practical solution whereby the user equipment (UE) can reuse earlier target cell preparations after each handover to autonomously execute subsequent handovers. This saves the signaling overhead associated with the reconfiguration and repreparation of target cells after each handover. In this paper, a comprehensive study on the mobility performance of FCHO with respect to mobility failures and signaling overhead in frequency range 2 (FR2) is carried out. In particular, the performance of FCHO is compared with CHO for two different multi-panel UE (MPUE) schemes. Results show that FCHO substantially reduces the signaling overhead of CHO, while at the same time it also reduces mobility failures due to faster triggering of the handover that is achieved by saving the preparation delay.
