Train Data Transmission via NAT for Low-Latency Secure Access
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Solution Overview
Problem
Existing train data transmission methods face limitations in real-world environments due to physical location constraints and issues with high data latency and security in wireless transmission.
Innovation Solution
A train data transmission system utilizing network address translation (NAT) to enable wireless data transmission, including a train data acquisition device, onboard central control device, NAT server, data center, and access terminal, with data encryption and secure point-to-point communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wired transmission methods are used for train data transmission, then real-time acquisition of train status data is achieved, but physical location constraints cannot be overcome
Solution Approach 1:
The patent introduces a NAT server as an intermediary between the train's onboard network and the public network. This mediator enables wireless data transmission by translating private IP addresses to public IP addresses, allowing the train to communicate remotely without physical wired connections while maintaining transmission reliability through established protocols
2Adaptability or versatility
If wireless data transmission methods are used, then physical location constraints are overcome, but high data latency and data security issues occur
Solution Approach 1:
The patent establishes persistent connections and pre-configures NAT mappings before data transmission is needed. The onboard central control device and NAT server maintain ready-state communication channels, so when data needs to be transmitted, the connection is already established and can transmit immediately without setup delays
3Adaptability or versatility
If wireless data transmission methods are used, then physical location constraints are overcome, but data security issues occur
Solution Approach 1:
The NAT server acts as a security intermediary that sits between the train's internal network and the public network. It performs address translation and can implement access control policies, filtering, and monitoring of data transmissions, thereby protecting the train's internal systems from direct external access while enabling wireless communication
Solution Approach 2:
The patent uses encryption for data transmission that can be dynamically generated and discarded. Session keys and encryption credentials can be temporary, providing strong security for each transmission session without requiring long-term security vulnerabilities, and can be easily regenerated if compromised
Data Source
AI summary
A train data transmission system and method, an apparatus, and a medium are disclosed. The method includes: acquiring, by a train data acquisition device, train-related data; receiving the train-related data from an onboard central control device and forwarding the train-related data to a database server by a network address translation (NAT) server; and in response to a web server receiving access information of an access terminal accessing a web service port exposed by a public network, acquiring, by the web server, target data from the train-related data stored in the database server according to the access information; and receiving, by the access terminal, the target data from the web server.