Train Control Command Prioritization for ATO State Changes
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Solution Overview
Problem
The existing information transmission system in trains does not account for the operating state of the device source, leading to potential delays in transmitting control commands, especially when Automatic Train Operation (ATO) is disabled, causing high-priority control commands for connection checks to interfere with real-time transmissions from other devices.
Innovation Solution
A transmission system that includes a transmitter and a system-controller to determine the operating state of the device source, allowing dynamic priority adjustment of control commands, ensuring that non-real-time control commands from ATO are transmitted with lower priority when the ATO is disabled, thereby prioritizing real-time commands from other controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ATO transmits control commands with high priority even when disabled, then connection checking function is maintained, but real-time transmission of control commands from other devices is delayed
Solution Approach 1:
The system dynamically adjusts the priority of control commands based on the operating state of the ATO. When the ATO is disabled, connection check commands are transmitted with low priority; when enabled, they switch to high priority. This dynamic priority adjustment resolves the contradiction by adapting the transmission priority to the actual operational context.
Solution Approach 2:
The invention changes the priority parameter of control commands based on the ATO's operating state. The system-controller modifies the priority level from high to low when the ATO is disabled, and vice versa when enabled. This parameter change allows the system to maintain connection checking functionality while preventing transmission delays for other real-time commands.
2Reliability
If fixed high priority is assigned to all ATO control commands, then connection checking is ensured, but adaptability to different operating states is lost
Solution Approach 1:
The system transitions from a static priority assignment to a dynamic one that adapts to the ATO's operating state. The system-controller continuously monitors whether the ATO is enabled or disabled and adjusts the priority accordingly, providing adaptability while maintaining reliable connection checking when needed.
Solution Approach 2:
The invention implements parameter changes by adjusting the priority level of control commands based on the ATO's operating state. This allows the system to be versatile and adaptive to different operational contexts while ensuring connection checking reliability when the ATO is actually enabled.
3Loss of time
If priority differentiation based on operating state is implemented, then real-time transmission is improved, but system complexity increases
Solution Approach 1:
The system-controller acts as an intermediary between the ATO and the transmitter. It receives control commands from the ATO, determines the operating state, and adjusts the priority before forwarding to the transmitter. This intermediary approach manages the complexity centrally rather than distributing it throughout the system.
Solution Approach 2:
The system implements feedback by having the system-controller continuously monitor the ATO's operating state and adjust priorities accordingly. This feedback mechanism automates the priority management process, reducing manual intervention complexity while improving real-time transmission performance.
Data Source
AI summary
A transmission system includes: a hub to receive a control command from two or more controllers that control operation of an in-vehicle machinery installed in a train, and to control an output of the control command on the basis of a priority assigned to the control command, and a system-controller to determine an operating state of a controller that is a source of the control command, the system-controller being capable of changing a priority assigned to a control command transmitted from a controller whose operating state has been determined, on the basis of a determination result.