Railroad Interoperable Train Control Messaging Protocol Encapsulation
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Solution Overview
Problem
Current railroad communication systems lack an efficient method to exchange different types of messages, such as Centralized Traffic Control (CTC), Interoperable Positive Train Control (IPTC), and Interoperable Train Control System Management (ITCSM) messages, using the same underlying communications infrastructure, leading to inefficiencies and potential communication disruptions.
Innovation Solution
The system encapsulates CTC messages using industry-standard EMP and Class D headers within the Interoperable Train Control Communications (ITCC) and Interoperable Train Control Messaging (ITCM) infrastructure, allowing for the exchange of various messages between railroad dispatch offices and remote assets over the same communications segment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate communication infrastructure is used for different message types (CTC, IPTC, ITCSM), then communication reliability for each message type is maintained, but communication system complexity and infrastructure costs increase
Solution Approach 1:
The patent implements a universal communication infrastructure where a single communication segment can handle multiple message types (CTC, IPTC, ITCSM) through protocol encapsulation. The ITCC infrastructure with ITCM system provides multi-functional capability to transport different railroad communication protocols over the same physical medium, eliminating the need for separate dedicated infrastructure for each message type while maintaining reliability through protocol-specific handling mechanisms
Solution Approach 2:
The patent employs nested protocol encapsulation where CTC messages are encapsulated within ITCM packets, which themselves are transmitted over the ITCC infrastructure. This nested structure allows multiple protocol layers (CTC protocol, ITCM protocol, ITCC transport) to be embedded within each other, enabling different message types to coexist on the same communication segment while maintaining their individual integrity and reliability requirements
2Reliability
If multiple communication segments are used to support different message types, then message type specificity is maintained, but communication efficiency and resource utilization decrease
Solution Approach 1:
The ITCC infrastructure with ITCM system provides a universal communication platform that efficiently handles multiple message types (CTC, IPTC, ITCSM) over the same communication segment. The system maintains message type integrity through protocol encapsulation and identification mechanisms while improving communication efficiency by consolidating multiple message streams into a single high-bandwidth infrastructure, thereby optimizing resource utilization
Solution Approach 2:
The patent merges multiple communication protocols (CTC, IPTC, ITCSM) into a unified communication framework where all message types are transmitted over the same ITCC infrastructure. This consolidation combines the advantages of dedicated protocol handling with the efficiency of shared infrastructure, maintaining message type specificity through protocol headers and encapsulation while achieving higher overall communication efficiency through resource sharing
Data Source
AI summary
A method of exchanging application messages generated by an applications with a format specified by a predetermined protocol and then encapsulating the message with a railroad edge messaging protocol (EMP) header and a railroad Class D messaging transport header to form a packet for transmission across a railroad communications system.