Train Control Data Size Adaptation for Railway Yard Capacity
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Solution Overview
Problem
Conventional train control systems using radio technology face limitations in managing a large number of trains due to fixed data sizes and limited communication bandwidth, leading to inefficiencies in railway yard areas where many trains are present, resulting in the need for increased wireless base stations.
Innovation Solution
The system adjusts data sizes based on train position information and track density, allowing on-board and ground control apparatuses to generate and transmit data optimized for each area, enabling more trains to be communicated with by a single wireless base station per unit time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the data size for train control communication is fixed, then the communication protocol is simple and stable, but the number of trains that can be communicated with per unit time is limited due to bandwidth constraints
Solution Approach 1:
The patent implements dynamic data size adjustment based on train position and track density. In high-density areas like railway yards, the system transmits only essential position information (reducing data size), while in low-density inter-station areas, full train control data is transmitted. This dynamic adaptation allows the single wireless base station to handle more trains per unit time without compromising control accuracy where needed.
Solution Approach 2:
The system applies different data transmission strategies to different spatial locations. Railway yard areas with high train density receive condensed position-only data, while inter-station areas with low density receive complete control data. This localized quality adjustment optimizes bandwidth utilization across different operational contexts.
2Productivity
If more wireless base stations are deployed to handle high train density in railway yard areas, then the communication capacity increases, but the system cost and complexity increase
Solution Approach 1:
The patent changes the data transmission parameters (data size) based on operational context. By transmitting reduced-size position-only data in high-density railway yard areas and full control data in low-density areas, the system maximizes the utilization of a single wireless base station's capacity, eliminating the need for additional infrastructure.
3Productivity
If fixed data size is used for all train positions, then the communication protocol is simple, but communication efficiency decreases in high-density areas
Solution Approach 1:
The system transmits only the necessary portion of data based on train location and density. In railway yard areas, only position information (partial data) is transmitted, while in inter-station areas, complete control data is transmitted. This partial transmission approach optimizes bandwidth usage without sacrificing necessary control information.
Data Source
AI summary
The present invention includes an on-board control apparatus that generates train position information using ground coil position information and train speed information and outputs the train position information, and a ground control apparatus that receives the train position information outputted by the on-board control apparatus, identifies a position of a train using the train position information and stored track information, generates train control data having a size corresponding to the identified position of the train, and outputs the train control data toward the train.