5G + rail transit, supporting the robust development of smart urban rail systems.
2023-10-27
5G+ Rail Transit Context
At present, China has ranked first worldwide in terms of urban rail transit operating mileage, and the number of cities with operational rail systems and the total length of their lines both place the country among the global leaders. However, as the pace of urban rail construction slows, the operational and maintenance management pressures on existing lines are steadily mounting. During the 14th Five-Year Plan period, the focus of urban rail transit development is shifting from construction to a phase of balanced advancement that equally emphasizes both infrastructure expansion and operational management.
Smart urban rail transit, epitomized by 5G, represents the future direction of next-generation urban rail systems—a fundamentally new form of urban rail transport built on enhanced safety, greater efficiency, and environmental sustainability.
Development Needs and Pain Points of Rail Transit Train-to-Ground Communication
Based on surveys of numerous integrated rail transit construction and operation companies nationwide, the requirements and pain points of train‑to‑ground wireless communication networks are as follows:
1) At present, the wireless bandwidth of the metro’s self-built private network is insufficient, making real-time video transmission challenging.
2) Insufficient wireless bandwidth hinders emergency communications;
3) The communication methods of smart train status sensors are outdated;
4) Safety inspections of the track area in urban rail tunnels during nighttime;
5) Passenger demand for scanning codes to enter the station during periods of high passenger volume;
6) ......
5G+ Rail Transit Application Scenarios
Leveraging its unique technical advantages—such as high bandwidth, low latency, network slicing, 5G positioning, and RedCap—5G technology can meet the diverse needs of rail transit in areas like operations management, equipment maintenance, and passenger services. For example, Real-time transmission of onboard data, including the Passenger Information System (PIS) and the CCTV system; real-time monitoring of onboard operational status; robotic inspection; and cluster communication services. Wait.
5G In-Vehicle Antenna and Feeder Cable Connection System Solutions and Products
The system primarily comprises an on-board antenna feed system, as well as a ground-based core network and transmission units, as shown in the figure below.
5G Train-to-Track Wireless Communication Topology Diagram
Our company primarily focuses on 5G in-vehicle antenna and feeder systems, offering comprehensive product solutions. The 5G in-vehicle antenna and feeder system is mainly composed of… 5G In-Vehicle TAU (T515) 、 5G Feeder (SPUMA_400-FR-01) 、 5G multi‑band antenna (AC65A) and the user‑managed platform (AumiCloud) Composition.
5G In-Vehicle TAU (T515) It supports 5G private network access for China’s three major telecom operators and features high uplink and downlink data rates. Deployed at the front and rear of the train, it provides… Data access services are provided by systems such as train operation status monitoring, the Passenger Information System (PIS), and Closed-Circuit Television (CCTV). 。 Supports 5G full-network compatibility and both public and private network access, with optional support for LTE‑M, Wi‑Fi 6, and other features. ， 4 GE ports, dual SIM support, with eSIM capability, It adopts a standard 1U chassis form factor and can be directly installed in a standard rack. Compliant with EN 50155 Relevant standard design requirements;
5G feeder cable Adopted by HUBER+SUNER SPUMA_400-FR-01 model ， Ultra-soft, flame-retardant, low loss <0.3 dB/m, Complies with relevant domestic and international standards;
5G All-in-One Fin Antenna (AC65A) It features four 5G full-band antennas and one GPS/BD antenna. At the same time, it is fully compatible with 4G LTE‑M antennas in terms of installation method. , helping integrators and vehicles achieve seamless 4G/5G switching.
User Self-Management Platform (AumiCloud) Can support End-to-end monitoring capabilities at the service connection level , it can perform real-time monitoring of network metrics such as traffic volume, throughput, latency, packet loss rate, and jitter; at the same time, it also features Intelligent Surveillance Capabilities include intelligent fault isolation for service‑connection interruption and poor‑quality‑of‑service faults, with the ability to rapidly pinpoint issues.
Solution Advantages
1) This TAU can simultaneously support a 4G LTE‑M private network (optional), a 5G public‑private network, and Wi‑Fi 6 (optional), making it suitable for a wide range of applications.
2) The AC65A fin‑type antenna supports multiple bands, including 4G, 5G, and Wi‑Fi, thereby reducing the number of antennas required.
3) Fully compatible with existing TAU and antenna installation methods, enabling seamless evolution;
4) The TAU is directly connected to the all-in-one fin antenna, with a low-loss feed line in between to minimize signal attenuation.
5) A user‑managed platform that helps users achieve intelligent service boundary definition and intelligent operations and maintenance for 5G networks, 5G terminals, and services.
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