Priority-Queued Data Transmission on Unidirectional Mission-Critical Links
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Solution Overview
Problem
Mission critical systems face challenges in transmitting data securely and efficiently due to unidirectional data communications networks, where acknowledgments cannot be sent back, leading to issues with data throughput customization, robustness, and security, especially when interfacing with non-mission critical systems.
Innovation Solution
Implementing a data priority management component that prioritizes data transmission based on levels, uses symmetric encryption, and employs QoS functionality to ensure high-priority data is transmitted first, interspersing key frames with high-priority updates, and utilizing unidirectional networks to maintain security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If data is transmitted over unidirectional networks without acknowledgments, then security is improved, but reliability of data transmission deteriorates
Solution Approach 1:
The patent implements preliminary error detection and correction coding before data transmission over the unidirectional network. Checksum fields and error correction codes are预先 embedded in the data packets, enabling the receiving system to detect and correct errors without requiring acknowledgment packets to return to the mission critical system, thus maintaining both security and reliability
Solution Approach 2:
The patent introduces an intermediary gateway system that sits between the mission critical system and external networks. This gateway performs protocol translation, error handling, and data validation, allowing reliable data transmission while maintaining the unidirectional security constraint by preventing direct bidirectional communication
2Productivity
If data priority management is implemented, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements quality of service (QoS) functionality that assigns different priority levels to different data streams locally at the transmission point. High-priority mission critical data receives preferential treatment in buffering and transmission scheduling, while lower-priority data is managed separately, improving overall efficiency without requiring complex system-wide reconfiguration
Solution Approach 2:
The patent segments data transmission into multiple priority-level queues and uses key frame fragmentation for high-priority data. This segmentation allows critical data to be transmitted and acknowledged independently from non-critical data, improving transmission efficiency while keeping the complexity localized to specific data handling paths rather than the entire system
3Object-affected harmful factors
If bandwidth is limited on unidirectional networks, then network security is maintained, but data throughput decreases
Solution Approach 1:
The patent compresses data and encodes error correction codes before transmission to maximize the use of limited bandwidth. By preparing data efficiently in advance and using compact encoding schemes, the system transmits more information per unit of bandwidth consumed, improving throughput without compromising the unidirectional security architecture
Solution Approach 2:
The patent implements selective data transmission where only essential high-priority data is transmitted over the limited-bandwidth unidirectional network, while non-critical data is either deferred or transmitted through alternative channels. This partial action approach ensures critical throughput requirements are met within the bandwidth constraints while maintaining security
Data Source
AI summary
Techniques for managing data flowing from mission critical systems. Embodiments include receiving a plurality of data values to transmit to a remote system using a unidirectional data communications network. The data values are prioritized according to a plurality of priority levels and the prioritized plurality of data values are grouped into one or more data updates for each of the plurality of priority levels. Embodiments enqueue the one or more data updates into a respective transmission queue corresponding to each of the plurality of priority levels and transmit the data updates over the unidirectional data communications network in an order determined based on the respective priority levels of the transmission queues.