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Mass Transit eLTE Multi-Service Unified Transmission Solution

Zhengzhou Metro discusses world's first LTE-enabled urban rail line

To support data services for rail transit Huawei offers an LTE solution that overcomes the limitations of previous technologies:

  • Legacy communications systems run on separate networks, resulting in high costs and complex Operation and Maintenance (O&M)
  • Communications-Based Train Control (CBTC) signals are vulnerable to interference
  • A Wi-Fi AP’s range is only 219 yds (200m), so trains moving at 75 mph (120 km/h) cause frequent handovers, degrading user experience

Huawei’s solution eliminates these issues with dual-network communications on dedicated frequencies, unified long-distance train-ground communications, and multiple services over a unified transmission network.

Unify communications with high-redundancy wireless coverage

Huawei’s LTE-based solution ensures reliable communications using a dual-network architecture and redundancy designs at the system, device, and board levels. The use of dedicated-frequency LTE networks and technologies such as Interference Rejection Combining (IRC) and Inter-Cell Interference Coordination (ICIC) enhances the network’s anti-interference capability.

Unified train-ground communications simplify maintenance

Huawei’s LTE network provides long-distance coverage, reducing the number of devices that are needed in complex environments such as tunnels. A uniform network management system for network and terminals simplifies the system O&M. In addition, no network devices are needed in tunnels, further simplifying network O&M. A single network supports multiple services, including CBTC, PIS, trunking, and CCTV. The LTE solution ensures network reliability and QoS of critical services using multiple schemes such as radio link budget, 9-level QoS, and a backbone transport network protection switching time less than 50 ms. 

LTE networks carry multiple services for high-speed trains

The Huawei Mass Transit eLTE Multi-Service Unified Transmission Solution offers a highly reliable train-ground convergent communication platform supporting high-speed trains. The LTE train-ground communication system supports 80 Mbit/s throughput for trains traveling at speeds as high as 268 mph (431 km/h). With this solution, a unified network carries multiple services, improving operating efficiency and reducing both network construction and O&M costs.

Get big benefits with enterprise ICT solutions from Huawei

Improve service reliability

Nine-level QoS ensures preferential processing of mission-critical services to minimize stoppages

Reduce network complexity to simplify O&M

With a cell radius of 0.7 mi (1.2 km), LTE cuts the number of network devices along railway lines

Carry multiple services on one network

A unified network carries many services, including CBTC, PIS, and trunking to cut construction costs

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