NEWS CENTER

Solution

To meet the demands of high-speed train mobile broadband communication systems, railway line maintenance, and emergency communication systems within the railway sector, and to enhance broadband wireless video, voice, and data communication capabilities under high-speed mobility, Mesh self-organizing network high-mobility broadband wireless technology, combined with existing optical fiber networks at railway stations, provides a broadband wireless network communication platform along railway lines. As a leading developer and promoter of Mesh self-organizing networks, our company has carried out large-scale deployments in environments such as wireless cities, wireless campuses, and railway lines.

Mesh technology delivers high-speed mobile coverage, meeting the requirements for large-scale deployment in railway systems. The wireless Mesh self-organizing network features self-organization, auto-configuration, automatic performance adjustment, and automatic link repair, while supporting load balancing and redundancy backup, providing a stable and reliable platform for services such as wireless surveillance and mobile wireless monitoring.

Railway Data and Voice Communication: Wide-Ranging Applications

►Communication in Trackside Areas

   Reliable connectivity for operations along railway lines

►Communication for Maintenance Crews

    Real-time coordination and reporting for field maintenance teams

►Relatively Low Deployment Costs

    Cost-effective infrastructure rollout and maintenance

►Support for Multiple Management Methods

    Flexible system administration and operational control

►Capability to Meet Performance and Bandwidth Requirements

    Ensured service quality for both data and voice applications

Project Overview

Prior to entering and after exiting a tunnel, high-speed trains require visibility of the track conditions at the tunnel exit. For a mountainous tunnel approximately 10 kilometers in length, the management center mandates, from an operational safety perspective, the installation of a video surveillance system at the tunnel exit to monitor the rail conditions before a train re-enters that section.

Simultaneously, the video signal from the camera at the tunnel exit must be accessible within the train driver's cabin, allowing the driver to observe conditions ahead in advance. In the event of an emergency or unexpected situation, the train driver can initiate early deceleration or a full stop, thereby preventing accidents and effectively enhancing operational safety.

Proposed Solution

Based on the information provided and on-site requirements analysis, the train operates at approximately 300 km/h. The driver can only see a level crossing from about 300 meters away. Therefore, early signal handshake and communication must be established between the level crossing and the train cabin to enable early warning.

Moreover, stable reception of signals from the crossing transmitter must be maintained while the train is in motion. To address these challenges, we have designed a wireless MESH base station solution. High-definition cameras are installed at the exit and can be deployed in multiple units as needed. A video multiplexer at the backend combines the feeds into a single output stream.

The captured video is transmitted via optical fiber to the train driver's cabin, allowing the driver to observe track conditions well in advance. When the train enters the tunnel, to ensure continuous signal reception in the cabin, MESH base stations are installed inside the tunnel. As the train approaches each node, it receives the signal from the nearest station.

Each node transmits modulated signals on the same frequency, enabling the train to automatically communicate with the nearest transmitter when approaching a crossing—without requiring manual adjustment of the receiver frequency.

Transmission Advantages

This solution leverages the inherent strengths of MESH self-organizing network technology, which include low power consumption, low operating frequency, long transmission range, excellent signal diffraction, and high signal reception sensitivity. Through multi-hop wireless relaying, the transmission distance can be further extended to meet the requirements for continuous, long-range coverage in demanding railway environments.

Solution Equipment

Self-Organizing MESH Base Station / Relay

Model: ME52-1400

Introduction: The ME52-1400 is a lightweight broadband MESH relay device, integrating MIMO technology to deliver high‑performance self‑organizing network capabilities. Equipped with a built‑in 4W high‑linearity power amplifier, it enables a centerless, multi‑hop networking architecture. The device supports seamless handover between 4G LTE public networks and MESH links, and is further equipped with 2.4G Wi‑Fi, PTT voice, and HDMI high‑definition video input. Its base features a tripod‑mount structure, making it well‑suited for rapid on‑site deployment as a fixed relay node, base station node, or access point.

Solution Advantages

• Seamless Handover at the Protocol Level
  Supports hierarchical grouping and roaming networking, extending the system's communication capabilities.

• Decentralized Link Support
  The system operates without a central network, allowing flexible deployment as needed. It requires no supporting infrastructure such as equipment rooms or transmission networks, can be freely configured, and can expand coverage through multi-hop relay networks.

• Multi-Link Data Diversity and Fault Tolerance
  Features frequency hopping to effectively enhance anti-interference and anti-tracking capabilities. Incorporates digital filtering to effectively suppress remote interference. Simultaneously, the ARQ transmission mechanism is adopted, reducing data transmission loss rates and improving data transmission reliability.

• Strong Anti-Multipath Capability
  Utilizes COFDM technology for strong resistance to multipath effects. Data transparent transmission supports various service data types without requiring differential transparent transmission. Through broadband transmission, it can support clear voice, broadband data, high-definition video, and other multimedia services.