How China Mobile Keeps Millions Connected on Beijing Subway: Inside the High‑Reliability Network Ops Center

Commuters on Beijing's Line 10 rely on chat, video, gaming, shopping, and email, making the subway the busiest in the network with tens of thousands of users needing reliable connectivity. The China Mobile Beijing Network Management Center’s monitoring hall reveals how a robust network is built and maintained.

Key Metrics Near 100% Ensure High Reliability

The hall features a 101 m² display composed of 75 70‑inch screens, providing real‑time, precise visibility of network quality across all services. Voice call connection rates stay around 99.9%, while access, download, and video playback success rates exceed 99.8%, and latency remains at millisecond levels, meeting the demands of video, gaming, and other applications.

Staff monitor the network 24/7, delivering continuous, high‑quality service.

Targeted Assurance for Large‑Scale Events

During major events, the system instantly flags faults on the big screen, triggers alerts, and dispatches work orders, ensuring stable operation even under heavy load. For the recent National Day parade, the network supported over 20 000 users simultaneously sending video and photos in a 5 000 m² area, a record‑breaking scenario.

High‑Tech Enhancements Optimize Decision‑Making

The center employs a minute‑level assurance system that leverages big data and machine learning to update user‑perceived metrics every minute, visualizing crowd distribution, network load, and quality, and automatically generating solutions with a one‑click deployment feature.

Integrating 5G and VR, a VR‑based command system overlays real‑time 4K video from panoramic cameras on the monitoring display, giving operators an immersive view of the protected area.

Efficient Management and Smart Operations

A 3‑D simulation platform models the entire Caishikou data‑center building, displaying assets from campus to individual ports across nine hierarchical layers, enabling intuitive monitoring and management.

The large screen also shows power topology, allowing rapid fault localization and repair.

Modern Data‑Center Practices Ensure Safety and Efficiency

Access to the DC is controlled by facial‑recognition and mandatory online training. Robots equipped with LiDAR, temperature, humidity, smoke, and sound sensors perform 24‑hour patrols, conduct daily inventory of servers, and enhance security.

The cooling system uses a cold‑pool design with asymmetric air‑conditioning and AI‑simulated airflow to save energy, while extensive use of blind plates and fire‑proof fabrics prevents short‑circuiting of hot and cold air streams.

These technologies collectively reveal the sophisticated infrastructure that keeps mobile communication seamless for millions of users.