Distributed Redundancy Control for Intelligent Traffic Networks
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Solution Overview
Problem
Intelligent traffic networks face challenges in managing redundant systems, particularly in ensuring timely and efficient data transmission between control centers and junction switches, and in maintaining operational reliability of signaling lamps, which can lead to communication failures and manual intervention risks.
Innovation Solution
A distributed redundancy control method and system where communication control nodes elect a primary device based on preset priorities and traffic states, enabling data backup and automatic adjustment of signaling lamp control intervals, ensuring continuous operation and data transmission even in case of failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control adjustment is used for signaling lamps, then operational flexibility is improved, but reliability deteriorates due to human intervention risks
Solution Approach 1:
The system enables self-service through automatic failure detection and redundant control mechanisms. When a communication control node fails, the system automatically detects the failure and switches to a backup control node without requiring manual intervention, thereby maintaining reliability while preserving operational flexibility through automated decision-making
Solution Approach 2:
The system implements preliminary action by pre-configuring redundant control nodes and establishing failover protocols in advance. The backup control nodes are prepared and ready to take over immediately upon detecting a failure, eliminating the need for manual intervention and ensuring continuous reliable operation
2Speed
If data transmission priority is increased for real-time control, then responsiveness is improved, but data loss risk worsens due to transmission failures
Solution Approach 1:
The system applies local quality by implementing different transmission strategies for different data types. Critical real-time control data is transmitted with high priority and speed, while less critical data uses standard transmission. This differentiated approach ensures that speed improvements for critical data do not compromise overall system reliability
Solution Approach 2:
The system implements beforehand cushioning through redundant data transmission paths and backup communication channels. When the primary transmission path fails, the system can immediately switch to alternative paths, cushioning against data loss and ensuring reliable data delivery even under high-speed transmission conditions
3Ease of operation
If control devices are placed at junctions for convenient access, then ease of operation is improved, but security deteriorates due to unauthorized access risks
Solution Approach 1:
The system applies segmentation by separating the control functionality from the physical device location. Control functions are distributed across multiple control nodes including remote communication control nodes, while physical devices at junctions have limited local capabilities. This segmentation allows convenient local access while maintaining centralized security control through authenticated communication between nodes
Solution Approach 2:
The system uses intermediaries in the form of communication control nodes that mediate between operators and signaling lamp control. These intermediary nodes authenticate and authorize control commands, allowing convenient access at junctions while preventing unauthorized access through layered security verification
4Reliability
If redundant control nodes are added to the network, then reliability is improved, but system complexity worsens
Solution Approach 1:
The system applies universality by designing control nodes with multi-functional capabilities. Each communication control node can perform multiple functions including traffic control, data transmission, failure detection, and backup operations. This multi-functionality reduces the need for specialized redundant components, thereby improving reliability while minimizing the increase in system complexity
Solution Approach 2:
The system implements merging by combining redundant control functionality with existing communication infrastructure. Rather than adding separate redundant hardware systems, the patent integrates backup control capabilities into the existing communication control nodes, merging redundancy with operational functionality to reduce overall system complexity while maintaining reliability
Data Source
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AI summary
A distributed redundancy control method and system for an intelligent transportation network. The method comprises: with respect to communication control nodes (62-67), the communication control nodes transmit a master device election packet to the other communication control nodes, elect a master device (67) among the multiple communication control nodes on the basis of priorities configured for the communication control nodes, and back up data of the communication control nodes into the master device (67) (S202); the master device (67) transmits a state detection packet to the other communication control nodes (62-66) and, with respect to the other communication control nodes (62-66) other than the master device, when a response packet from the communication control nodes for the state detection packet is such that the communication control nodes are incapable of executing an action for controlling a subordinate device of the communication control nodes, executes an action for controlling the subordinate device of the communication control nodes, and the master device (67) adjusts control times for signal lights of corresponding junctions on the basis of junction traffic volumes corresponding to the communication control nodes (62-67) in the redundancy network (S203). The method implements distributed redundancy control for the intelligent transportation network.