基于5G终端的室内3D定位

Indoor 3D Positioning Based on 5G terminal

随着物联网的发展及对基于位置服务的应用需求的增多,高精度的室内定位技术成为当前研究的焦点之一。5G蜂窝网络的广泛应用在为终端提供无线通信的同时,也具备定位功能。然而,当前的定位方法通常在基站侧完成,这可能导致用户隐私泄漏的问题。为解决这一问题,提出了一种基于5G终端的室内3D定位技术,使得定位过程可以在终端设备上完成。首先,终端设备测量接收到的5G小基站发射信号的离开方位角和离开仰角,并利用两个基站之间的到达时间差进行解空间约束;其次,采用基于遗传算法的位置求解优化算法搜索目标位置。实验结果表明,该算法在3D空间中的定位精度中值为1.12 m,并且相较于基站侧的定位方法,终端定位具有更高的安全性。

With the development of the Internet of Things and its increasing demand for location-based service applications,high-precision indoor positioning technology becomes one of the current research focuses.The widespread deployment of 5G cellular networks not only provides wireless communication for terminals,but also has positioning capabilities.However,current positioning methods are typically performed at the base station side,which may raise concerns about user privacy leakage.To address this issue,a novel 5G terminal-based indoor 3D positioning technique is proposed,which allows the positioning process to be carried out on the terminal device.First,the terminal device measures the departure azimuth and departure elevation angles of the received signals from 5G small base stations.It utilizes the arrival time difference between the two base stations to impose constraints on the solution space.Then,it searches for the target position by using localization estimation optimization algorithm based on genetic algorithm.The experimental results demonstrate that the proposed algorithm achieves a median positioning accuracy of 1.12 m in 3D space,while offering enhanced security compared to the base station side positioning methods.