Rail Vehicle Communication System Antenna Routing Arbitration
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Solution Overview
Problem
Wireless data communication with rail vehicles is hindered by propagation issues such as dead spots, reduced transmission rates, and atmospheric interference, which affect the reliability of transmitting control messages for tractive and braking efforts.
Innovation Solution
A communication system comprising antenna modules spaced along the rail vehicle consist, routing modules, and an arbitration module, which receive and reconstitute trip profiles from off-board devices to ensure reliable transmission of control messages to propulsion subsystems through a network connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless transmission is used to communicate control messages to moving rail vehicles, then communication flexibility and mobility are improved, but transmission reliability deteriorates due to dead spots, atmospheric interference, and signal loss
Solution Approach 1:
The patent segments the wireless communication system into multiple spatially distributed antenna modules positioned along the rail vehicle consist. Each antenna module independently receives trip profile data from off-board devices, creating redundant reception paths that mitigate the effects of dead spots and atmospheric interference on individual antennas.
Solution Approach 2:
The patent introduces an intermediary wired network connection system that receives trip profile data from multiple antenna modules and relays it to the propulsion subsystem. This intermediary network acts as a backup communication path when wireless transmission fails or degrades due to propagation problems.
2Reliability
If multiple antenna modules are deployed along the rail vehicle consist, then transmission reliability is improved through redundant reception paths, but device complexity increases
Solution Approach 1:
The patent designs each antenna module with universal functionality to receive and process trip profile data independently. The routing modules and arbitration module are designed to handle inputs from any number of antenna modules, allowing the system to scale without proportionally increasing complexity. The arbitration module consolidates multiple input streams into a single coherent message for the propulsion subsystem.
3Reliability
If wired network connection is used for internal communication within the rail vehicle consist, then transmission reliability is improved, but ease of operation deteriorates due to physical connection requirements
Solution Approach 1:
The patent implements a dynamic communication architecture where the arbitration module can selectively route data from any active antenna module to the propulsion subsystem. This dynamic routing capability allows the system to adapt to changing operational conditions and antenna availability without requiring manual reconfiguration or physical reconnection of the wired network.
Data Source
AI summary
A communication system for a rail vehicle consist includes antenna modules, routing modules, and an arbitration module. The antenna modules are disposed at spaced apart locations and receive a trip profile from an off-board device. The trip profile is related to tractive and/or braking effort supplied by one or more powered units of the rail vehicle consist. The routing modules are disposed on the powered units and are communicatively coupled with the antenna modules. The routing modules are communicatively coupled with a network connection extending along the rail vehicle consist between the powered units. The arbitration module is communicatively coupled with the routing modules by the network connection. The routing modules transmit the received trip profile to the arbitration module. The arbitration module reconstitutes the trip profile into a message that is transmitted to a propulsion subsystem of one or more of the powered units.