The 6th generation (6G) wireless networks will likely to support a variety of capabilities beyond communication, such as sensing and localization, through the use of communication networks empowered by advanced technologies. Integrated sensing and communication (ISAC) has been recognized as a critical technology as well as an usage scenario for 6G, as widely agreed by leading global standardization bodies. ISAC utilizes communication infrastructure and devices to provide the capability of sensing the environment with high resolution, as well as tracking and localizing moving objects nearby. Meeting both the requirements for communication and sensing simultaneously, ISAC based approaches celebrate the advantages of higher spectral and energy efficiency compared to two separate systems to serve two purposes, and potentially lower costs and easy deployment. A key step towards the standardization and commercialization of ISAC is to carry out comprehensive field trials in practical networks, such as the 5th generation (5G) network, to demonstrate its true capacities in practical scenarios. In this paper, an ISAC based outdoor multi-target detection, tracking and localization approach is proposed and validated in 5G networks. The proposed system comprises of 5G base stations (BSs) which serve nearby mobile users normally, while accomplishing the task of detecting, tracking and localizing drones, vehicles and pedestrians simultaneously. Comprehensive trial results demonstrate the relatively high accuracy of the proposed method in practical outdoor environment when tracking and localizing single targets and multiple targets.

翻译：第六代（6G）无线网络将有望通过先进技术赋能的通信网络，支持除通信之外的多种能力，如感知与定位。集成感知与通信已被全球领先标准化机构广泛认可为6G的关键技术及典型应用场景。ISAC利用通信基础设施和设备，提供高分辨率环境感知、邻近运动物体跟踪与定位的能力。通过同时满足通信与感知需求，相比独立服务于两种功能的分离系统，ISAC方法具有更高的频谱与能量效率，并可能降低部署成本与难度。实现ISAC标准化与商业化的关键步骤，是在实用网络（如第五代5G网络）中开展全面现场试验，以验证其在真实场景中的实际能力。本文提出了一种基于ISAC的室外多目标检测、跟踪与定位方法，并在5G网络中进行了验证。所提系统包括正常服务附近移动用户的5G基站，同时实现对无人机、车辆和行人的检测、跟踪与定位任务。综合试验结果表明，该方法在跟踪与定位单一目标及多目标时，在实用室外环境中具有较高精度。