Published: 2023-08-30
The Optics Valley Skyrail Tourist Line is located within the Guanggu Central Ecological Corridor in the East Lake High‑tech Development Zone of Wuhan, Hubei Province. With a planned total length of 26.7 km, the initial phase is approximately 10.5 km long and includes 6 stations. Shanghai MRDCom Co., Ltd. has contributed to this project by providing MRD switches and tailored industrial internet solutions, delivering the AFC system switches and networking solution for the Optics Valley Skyrail Tourist Line.
01 Project Background
The Wuhan Optics Valley Skyrail Tourist Line is one of the key supporting infrastructure projects for the ecological corridor, planned as a tourist route that integrates waterway, greenway, and aerial rail – the "three‑in‑one" layout. The initial phase includes six stations: Jiufengshan Station, Gaoxin Avenue Station, Gaoxin 2nd Road Station, Gaoxin 4th Road Station, Comprehensive Bonded Zone Station, and Longquanshan Station. The line connects tourist attractions such as Jiufeng National Forest Park and the Longquanshan Ming Chu Royal Tomb Archaeological Site Park at both ends. It also enables convenient transfers to Wuhan Metro Line 11 and the Guanggu Tram L2, facilitating travel for visitors to the ecological corridor and its surrounding attractions. This project is China's first commercially planned urban "skyrail" and will become the country's first suspended monorail line to enter commercial operation.
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02 Solution Overview
For this project, Shanghai MRDCom Co., Ltd. primarily provided the AFC system networking switches and the overall networking solution for the Wuhan Optics Valley Skyrail Tourist Line. The AFC system is a computer‑controlled automated network system that integrates ticket vending, ticket checking, fare collection, and statistics, automating the entire process of ticketing, fare calculation, revenue collection, data analysis, clearing, and management for rail transit operations.
In terms of station ring network design, VRRP technology is deployed on two switches at each station, with the two devices acting as active and standby for each other. The station‑layer Layer 3 switches and Layer 2 switches communicate via MRD's proprietary ring protocol for redundant communication.
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Inter‑station connectivity is achieved through the data network, isolating ring network traffic between stations to prevent mutual interference. Each station is connected to the data network with dual links, providing mutual redundancy and backup.
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03 Solution Highlights
VRRP at Station Switches: VRRP ensures consistent configuration between the two switches at each station and prevents network issues caused by a single switch failure. In the event of a single switch failure, seamless switchover is achieved, ensuring uninterrupted data transmission and significantly enhancing network stability and reliability.
MRD Proprietary Ring Protocol: The AFC system within each station uses MRD's proprietary ring protocol, enabling millisecond‑level switching in case of link or switch failures. This ensures the reliability, efficiency, sustainability, and stability of video and data transmission.
Data Network for Inter‑Station Connectivity: The use of a dedicated data network between stations ensures that ring networks at different stations do not interfere with each other, improving overall network stability.
Dual‑Link Redundancy Between Stations and Data Network: Dual redundant links between each station and the data network guarantee the reliability and stability of AFC data.
04 Solution Products
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Layer 3 Managed Industrial Ethernet Switch (19‑inch 1U Rack‑mount)
This switch adopts an advanced hardware architecture and runs on a proprietary operating system with independent intellectual property. It features redundant wide‑voltage industrial power supplies. The high‑reliability industrial Ethernet ring technology offers ring self‑healing time of less than 50 ms (typical value). The product has passed rigorous industry‑standard testing and is designed to operate in harsh industrial environments with stringent EMC requirements. With IK05 impact/vibration resistance and IP30 protection rating, it meets the demanding requirements of the transportation industry.
·Supports Gigabit Combo ports with optional optical/electrical interfaces for flexible port configuration
·Supports up to 8 10‑Gigabit optical ports, 16 Gigabit electrical ports, and 4 Gigabit SFP slots; supports STP/RSTP/MSTP protocols, as well as ring protection, dual‑uplink active‑standby link protection, and LACP link aggregation for simple and efficient redundancy
·Supports 802.3ah, 802.1ag, and ITU‑Y.1731, enabling rapid fault detection and localization through real‑time network status monitoring
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TCC4100 Series Rugged DIN‑rail Industrial Ethernet Switch with M12 Connectors
Specifically designed for rail transit applications, this switch complies with EN50155/50121 standards. The electrical ports adopt M12 rugged connectors to ensure stable operation under vibration or shock conditions. The backplane bandwidth reaches up to 68 Gbps. Any two ports can be used to form a self‑healing ring, and the TCC4100 supports multiple independent self‑healing rings, which can be dual‑fiber, single‑fiber, twisted‑pair, or any combination thereof. The TCC4100 series employs CPLD dynamic reconfiguration and reprogramming technology, offering high stability and reliability, with local and remote monitoring capabilities for various key operating parameters. The series features an extended industrial‑grade design and manufacturing process, making it suitable for harsh environments and outdoor applications.
·High‑performance, flexibly configurable switch with backplane bandwidth up to 68 Gbps
·Rugged M12 connectors
·Ring self‑healing time < 50 ms (typical value)
·Supports MRD‑Ring® media redundancy protocol based on IEC 62439‑2
·Any two ports can be used to form a self‑healing ring, with support for multiple independent self‑healing rings
·Dying Gasp function for active reporting of power‑loss status via SNMP
·Supports MODBUS/UDP/SNMP remote monitoring and various mainstream OPC software
·Built‑in MicOS real‑time operating system, unified across all MRD™ switches
·Redundant dual‑power input design
·Fanless, operating temperature –40°C to +85°C
·MTBF ≥ 600,000 hours
05 Solution Value
Reliability: The solution significantly improves the reliability of AFC data transmission.
Security: Reduces equipment maintenance frequency during later operation and minimizes network failures.
Continuity: Ensures uninterrupted service by minimizing downtime and network incidents.
Stability: Enables maintenance personnel to quickly diagnose and resolve faults, ensuring stable and reliable operation of the skyrail system.
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