On-board communication infrastructure

On-board communication infrastructure

Control, diagnostic, multimedia and other on-board systems are connected to common Ethernet-based network infrastructure.

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ETBN - Ethernet Train Backbone Nodes
ETBN is designed for high-speed Ethernet communication infrastructures in dynamically connected trains. It includes a Gigabit Ethernet interface for both ETB and ECN networks. The powerful processor ensures high routing performance of over 300 kfps even when R-NAT and firewall are active.
The main function of the ETBN is to route data packets between the ETB and ECN vehicle and train networks, and to create and maintain a train topology database with complete information about the current status of the train. The standardised communication services provide access to the database for end devices.
ETB – Ethernet Train Backbone
Used for communication between dynamically linked units / assemblies. The ETB inauguration automatically detects any topology changes, adjusts addressing and informs applications on the vehicle network. The high performance ensures trouble-free operation of demanding applications. Routing is automatically configured based on the results of the inauguration.
ECN – Ethernet Vehicle network
Connects or assembles network devices on the HYPEX platform in the vehicle. Other HYPEX-based devices, such as an ATO controller or NVR, can be integrated directly into this ring-topology network, ensuring redundancy of network connectivity when storing end-device ports.
The ethernet switches support configuration profiles selected by hardware configuration pins integrated into the power supply connector. This greatly simplifies deployment and service operations in multi-vehicle networks.
Managed Ethernet switches
Designed specifically for integrated Ethernet communication infrastructure, their modular HW design enables a wide range of production models with different port counts and configurations, communication speeds and PoE support.
The internal architecture of the HYPEX platform uses 10 Gbps communication links between each module to ensure full speed switching between all ports.
Network availability
The entire network is designed as fully redundant without a single point of failure.
The vehicle's circular network topology with a dedicated ring control protocol provides a 50ms recovery time in the event of a single link/switch failure. The bypass relays in each Ethernet switch further increase network availability in the event of multiple failures.
The connection between the vehicle network and the train backbone network is provided by redundant ETBN operating in active/standby mode. The standby ETBN continuously monitors the active node and takes control of all functions in the event that the active node fails. The redundancy is completely transparent for end devices.
The backbone of the train has a linear topology. Each ETBN is equipped with bypass relays on the ETB ports, which ensures continuous operation of the ETB when one node is powerless or not working. The ETBN continuously monitors both ETBs in each direction and redirects traffic as needed in the event of a line failure.
One network for multiple systems
With the Ethernet, a single physical network can be shared for multiple on-board systems. This approach reduces the number of network elements and cabling, optimising initial and LCC costs in addition to increasing overall vehicle availability.
The individual systems are separated by a VLAN. Inter-system data exchange (VLAN) is provided by a redundant high-performance router with advanced firewall capability. The quality of service policies implemented in each network element guarantee sufficient bandwidth and low latency for critical systems (TCMS, voice, video streams).
Network devices based on the HYPEX platform provide information for fast runtime diagnostics of the train backbone, vehicle circuit and connection of individual terminals. Detailed statistical counters are available for each port, which can be used for further network analysis.
Communication Gateway
The UIC-GATEWAY communication node is an important part of the equipment of railway vehicles operated in accordance with international standards IEC 61375 and UIC 556, which enables the connection of different series of railway vehicles and provides high functional reliability.
Enables communication between train and track buses
Compatible with international standards and norms
Key component redundancy or optional full redundancy
Option to connect/interconnect different series of rail vehicles
Has a PDM configuration database for the inclusion of process data
Optional communication interfaces, analogue and digital outputs/inputs
Servicing and configuration is performed using the INTELO + Visa application
Standardized RACK 3U cabinet
Determination of MTBF/MKBF and SIL/RAMS safety levels
UIC-GATEWAY – module for WTB train bus with a redundancy function
MVB-NODE – MCB communication module
CAN-RED – CAN communication module
INTELO+Viza – service and configuration applications