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）无线网络有望通过先进技术赋能的通信网络，在通信之外支持感知与定位等多种能力。通信与感知一体化（ISAC）已被全球主要标准化机构广泛认可为6G的关键技术及应用场景。ISAC利用通信基础设施与设备，提供高分辨率环境感知能力，并实现对附近运动目标的跟踪与定位。通过同时满足通信与感知需求，相较于为两种功能分别部署独立系统，ISAC方法具有更高的频谱与能量效率优势，并可能降低部署成本与复杂度。推动ISAC标准化与商业化的关键步骤，是在实际网络（如第五代（5G）网络）中开展全面外场试验，验证其在真实场景中的实际能力。本文提出一种基于ISAC的室外多目标检测、跟踪与定位方法，并在5G网络中完成验证。所提系统由5G基站（BS）组成，这些基站在正常服务附近移动用户的同时，同步完成对无人机、车辆及行人的检测、跟踪与定位任务。全面的试验结果表明，当对单目标与多目标进行跟踪与定位时，所提方法在实际室外环境中具有较高的精度。