Core Viewpoint - Shanghai Metro, in collaboration with China Mobile and Huawei, has established a 5G public-private network, enhancing operational efficiency and passenger experience in urban rail transit [1] Group 1: Infrastructure and Operations - Shanghai Metro has built 21 lines covering 517 stations, with over 7,000 trains and nearly 900 kilometers of operational mileage, serving over 10 million passengers daily [1] - The integration of 5G technology supports core operations such as scheduling, equipment maintenance, and safety management, enabling over 15,000 maintenance personnel to work efficiently [1] - The network must accommodate high-density passenger demands, especially during peak hours, requiring high capacity and low latency [4] Group 2: Technical Challenges - Urban rail transit networks face challenges such as limited construction time due to operational constraints, with only 3-4 hours available for network deployment at night [2] - Precise positioning is critical for safety operations, but underground environments hinder satellite signals, necessitating advanced base station positioning technologies [3] Group 3: Technological Innovations - Shanghai Metro has transitioned from a "communication pipeline" to a "digital artery," integrating various smart applications into the network to enhance safety, passenger experience, and management efficiency [5] - The use of the LampSite solution allows for rapid network upgrades by reusing existing fiber optics, while the EasyMacro solution simplifies tunnel construction and reduces costs by over 50% [6] Group 4: Positioning and Resource Management - Innovative positioning algorithms have been developed to achieve high-precision location tracking for people, vehicles, and objects, significantly improving inspection efficiency and reducing operational costs [7][8] - A multi-frequency collaborative network architecture has been implemented, achieving peak downlink speeds of 3 Gbps and uplink speeds of 500 Mbps, meeting high data transmission demands [9] Group 5: Operational Efficiency and Safety - The integration of 5G technology has led to a significant reduction in inspection times and enhanced emergency response capabilities, improving overall operational safety [10][11] - Data security measures have been established to ensure that operational data remains within the organization, enhancing privacy and information security [12] Group 6: Passenger Experience - The full 5G coverage has greatly improved passenger internet experience, with network congestion issues significantly alleviated, leading to over 90% growth in network traffic [13] - The upgraded Passenger Information System (PIS) provides real-time multimedia information, enhancing passenger service and increasing advertising value [13] Group 7: Global Impact and Standards - Shanghai Metro's 5G public-private network has influenced the establishment of national standards for urban rail transit, positioning it as a benchmark for global urban rail systems [14][15]