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。全球主流标准化机构已广泛达成共识，集成感知与通信（ISAC）被公认为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的双重需求，基于ISAC的方法相较于分离式双系统具有更高的频谱效率与能量效率，并可能降低部署成本与复杂度。推进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）中开展综合外场试验，以验证其在实际场景中的真实能力。本文提出一种基于ISAC的5G网络外场多目标检测、跟踪与定位方法，并在5G网络中完成验证。所提出的系统由5G基站（BS）构成，这些基站在服务附近常规移动用户的同时，同步完成对无人机、车辆及行人的检测、跟踪与定位。综合试验结果表明，在实用外场环境下，该方法对单目标与多目标的跟踪与定位均具有较高精度。