关键词: 综合时空网, 北斗+5G一体化基站, 低空经济, 通导一体, 5G控制面, 低空无人机

Abstract: As a new growth engine for China's economic development, the low-altitude economy relies heavily on the collaborative support of key technologies such as positioning, navigation and wireless communication for its large-scale development. The BDS/5G integrated spatiotemporal network, as a new infrastructure form of deep integration between the BeiDou Navigation Satellite System (BDS) and 5G communication technology, has become a core path to solve the core requirements of inte-grated communication and navigation in low-altitude scenarios and support the high-quality development of the low-altitude economy. Taking the BDS/5G integrated spatiotemporal network as the research object, and the BDS/5G integrated base station as the core network node and key technology carrier, this paper systematically sorts out the technical foundation of integrated communication and navigation for low-altitude unmanned aerial vehicles (UAVs), and analyzes the technical characteristics of BDS navigation, 5G communication/auxiliary positioning as well as the limitations of separate networking. The study elaborates the overall technical architecture of the BDS/5G integrated spatiotemporal network, focuses on the hardware fusion architecture, 5G control plane data broadcasting technology and networking deployment strategy of the BDS/5G integrated base station, conducts a comparative analysis of the technical paths and functional characteristics of ex-isting integrated base station schemes, and clarifies the advantages of low latency, high concurrency and high security of the 5G control plane in broadcasting enhanced data. Combining with the application scenarios of the low-altitude economy, the technical empowerment effects and practical value of the BDS/5G integrated spatiotemporal network are analyzed from four dimensions: global high-precision time synchronization, centimeter-level positioning enhancement, airspace multi-target collaborative perception, and low-altitude meteorological and safety monitoring. Finally, in response to the demand for the large-scale development of the low-altitude economy, the challenges faced by BDS/5G fusion technology and the construc-tion of integrated spatiotemporal network are pointed out, and the future development directions such as the integration of communication, sensing and navigation, PNT service enhancement, and innovation of networking operation modes are pro-spected. The research shows that the BDS/5G integrated spatiotemporal network can effectively solve the core pain points such as unstable positioning, insufficient supervision and weak security in low-altitude airspace through the full-domain service capability of wide-area networking of integrated base stations, build a digital spatiotemporal base with integrated communication and navigation and full-domain collaboration for the low-altitude economy, and provide an important refer-ence for the further optimization of relevant technologies and industrial implementation.

Key words: Integrated spatiotemporal network, BDS/5G integrated base station, low-altitude economy, integrated communication and navigation, 5G control plane, low-altitude unmanned aerial vehicle