面向6G动态场景的可移动去蜂窝网络覆盖性能分析

摘要：6G动态场景面临频繁切换、覆盖不均匀及信道快速变化等挑战，严重影响用户体验。去蜂窝网络通过分布式节点协作实现连续覆盖，而可移动天线通过小尺度位移主动改变信道环境，成为解决上述问题的使能技术。本文基于可移动去蜂窝网络系统，采用一种可实时调整天线辐射端口的可移动天线架构，通过动态适配机制以适应网络立体覆盖与高动态需求。通过构建信道相关性模型，表征移动速度对系统性能的影响机理，分析用户中断概率及网络中断速率的准确表达式，评估不同系统参数下的覆盖性能，并推导中断概率的近似闭式表达式，为6G动态场景覆盖提供参考。

关键词：6G移动通信；去蜂窝大规模MIMO；可移动天线；网络中断速率

Abstract: The sixth-generation dynamic scenarios face challenges such as frequent handovers, uneven coverage, and rapid channel variations, which severely affect the user experience. The cell-free network achieves continuous coverage through the cooperation of distributed nodes, while the movable antenna actively changes the channel environment via small-scale displacements, thus becoming an enabling technology for solving the above problems. This paper is based on the movable cell-free network system and adopts a movable antenna architecture that can adjust the antenna radiation ports in real time. It adapts to the requirements of network three-dimensional coverage and high dynamics through a dynamic adaptation mechanism. By constructing a channel correlation model, the influence mechanism of moving speed on system performance is characterized, the accurate expressions of user outage probability and network outage rate are analyzed, the coverage performance under different system parameter settings is evaluated, and the approximate closed-form expression of outage probability is derived, which provides a reference for the research and engineering practice in the field of 6G mobile communication technology.

Keywords: sixth-generation mobile communication; cell-free massive MIMO; movable antenna; network outage rate