Research Status and Trends of Indoor Positioning and Navigation Technology in China

As an essential component of future comprehensive Positioning, Navigation, and Timing (PNT) system, indoor positioning technology has extensive application demands, making it a focal point of attention in both academia and industry. This article comprehensively reviews the research status of indoor positioning technology in China, with a focus on highlighting representative achievements and application validations from major research institutions in recent years. It addresses the challenges and issues faced in promotion and application of large-scale, high-precision indoor positioning. Furthermore, a universal and seamless indoor-outdoor positioning system architecture is proposed, along with a technical roadmap and key technologies to achieve this architecture. Finally, an analysis and outlook on future technological trends are presented.