Radio Encoder Emulating Block-to-Block Signals for CBTC Integration
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Solution Overview
Problem
The migration from traditional railway control installations to Communication-Based Train Control (CBTC) installations is slow due to compatibility issues, as latest generation vehicles equipped with on-board ATC systems operating on the 'distance to go' principle cannot circulate on networks with conventional control installations without disconnecting and allowing driver control.
Innovation Solution
An integrated traffic control installation that includes positioning beacons, a radio encoder, and a communication network, allowing CBTC vehicles to operate on conventional networks by emulating the 'block to block' principle and enabling the 'distance to go' principle, while maintaining safety for vehicles without on-board ATC systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional control installation using block-to-block principle is used, then vehicles without on-board ATC systems can operate safely, but latest generation CBTC vehicles cannot circulate without disconnecting and allowing driver control
Solution Approach 1:
A radio encoder is introduced as an intermediary device that translates interlocking signals from the conventional control installation into radio messages compatible with CBTC vehicles. This mediator enables communication between the legacy block-to-block system and modern CBTC vehicles, allowing automatic operation while maintaining compatibility with both vehicle types on the same network
Solution Approach 2:
The control installation is enhanced to serve multiple functions: it continues to support conventional vehicles operating on block-to-block principle while simultaneously enabling CBTC vehicles to operate in distance-to-go mode. The system universally handles both operating modes through the radio encoder interface, eliminating the need for separate control systems
2Extent of automation
If CBTC vehicles with on-board ATC systems operating on distance-to-go principle are deployed, then automatic train control is improved, but compatibility with conventional control installations is lost
Solution Approach 1:
The radio encoder acts as a mediator that enables CBTC vehicles to interface with conventional control installations. It converts traditional interlocking signals into radio communication format that the CBTC on-board ATC system can process, thereby maintaining full automatic operation capability while ensuring compatibility with legacy infrastructure
Solution Approach 2:
The patent replaces the mechanical signal reception system with a radio communication system. Instead of relying on physical trackside equipment signals, CBTC vehicles receive control information via radio messages generated by the radio encoder, enabling automatic operation on conventional installations
3Adaptability or versatility
If radio encoder and communication network are added to conventional installation, then CBTC vehicle circulation is enabled, but infrastructure complexity increases
Solution Approach 1:
The radio encoder is merged with the existing interlocking system, combining the functions of signal generation and radio message encoding into a single integrated device. This reduces infrastructure complexity by eliminating separate radio transmission equipment and leveraging the existing control system architecture
Data Source
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AI summary
The invention relates to a traffic control installation (42) comprising an automatic train supervision system and IXL interlocking systems (34) managing the interlocking state of a plurality of trackside equipment (20) to allow the movement of a first vehicle according to a first principle of the "block-to-block" type. To allow the movement of a second vehicle (46) according to a second principle of the residual distance type, the installation (42) includes an interface system (52) comprising: - a communication network (54), - a radio encoder (56), and - base stations (58). The radio encoder (56) makes it possible to emulate an environment enabling the control of the movement of the second vehicle (46) according to the second principle, while said second vehicle is traveling on a railway infrastructure implementing traffic control according to the first principle.