Ring Network Node Link State Collision Detection
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Solution Overview
Problem
In ring network systems, when a cable connected to a conventional blocking node is snapped or detached, the link with the adjacent node is physically disconnected, leading to unnecessary user communication disconnection due to the inability to cancel blocking, resulting in temporary communication disruptions.
Innovation Solution
A ring network system where nodes detect changes in link states and transmit collision frames to determine a new blocking node, ensuring that collision is initiated only when a node can win with a high degree of possibility, prioritizing link states to prevent unnecessary disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision is started when transmission quality reduction is detected, then the node can transition to another blocking node, but unnecessary user communication disconnection occurs when the conventional blocking node cannot cancel blocking due to physical disconnection
Solution Approach 1:
The system checks whether the current blocking node can cancel blocking before initiating collision. This preliminary check prevents unnecessary collision initiation when the blocking node is physically disconnected and cannot cancel blocking, thereby avoiding unnecessary user communication disconnection while still enabling timely transition when cancellation is possible.
Solution Approach 2:
The system monitors the state of the current blocking node to determine whether it can cancel blocking. This feedback mechanism allows the system to adaptively decide whether to initiate collision based on the actual capability of the blocking node, preventing unnecessary communication disconnection while ensuring proper blocking node transition when needed.
2Stability of the object's composition
If blocking is maintained to prevent loops in Ethernet, then network stability is ensured, but user communication is temporarily disconnected during blocking node transition
Solution Approach 1:
The system performs a preliminary check to determine whether the current blocking node can cancel blocking before initiating collision. This prevents unnecessary collision initiation when the blocking node is physically disconnected, thereby maintaining network stability without causing unnecessary communication disconnection.
Solution Approach 2:
The system changes the parameter of collision initiation from being triggered solely by transmission quality reduction to being triggered only when both transmission quality reduction is detected AND the current blocking node can cancel blocking. This parameter change reduces unnecessary communication disconnection while maintaining network stability.
Data Source
AI summary
A ring network system is a ring network system in which a plurality of nodes including a blocking node that blocks transfer of a predetermined frame are connected in a ring shape, and when, any one of the plurality of nodes detects a change in a link state with an adjacent node, the node detecting the change transmits a collision frame for inquiring a collision of a blocking node to a current blocking node, and in accordance with a response from the current blocking node, a determination is made which of the nodes is to be a new blocking node, and in a case where the link state with the adjacent node has a higher priority level of blocking than a link state between the current blocking nodes, the node having detected the change transmits a collision frame for inquiring a collision of the blocking node.