WSON Node Resource State Recovery via Automatic Mismatch Detection
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Solution Overview
Problem
In the WSON system, mismatches in wavelength resource states between adjacent network-element devices can lead to occupation of link bandwidth resources, making calls unestablishable and requiring database reset, which causes interruptions and loss of call information, with no effective method to release resources without clearing configurations.
Innovation Solution
A method and apparatus for automatically detecting and correcting wavelength resource state mismatches by regularly comparing resource states between nodes, determining the occupied resource, and releasing it automatically, with an alarm system to notify and clear inconsistencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the configuration database is cleared through node reset to release occupied bandwidth resources, then the resource occupation problem is resolved, but all calls through this node are interrupted and call information is lost
Solution Approach 1:
The system performs preliminary detection of wavelength resource state inconsistencies before they cause call establishment failures. By regularly comparing resource states between adjacent nodes and detecting mismatches early, the system can correct inconsistencies before they impact call continuity, thus resolving the resource occupation problem without interrupting existing calls.
Solution Approach 2:
The system implements a feedback mechanism where nodes continuously exchange resource state information and compare it with local records. When inconsistencies are detected, the system generates alarm information and automatically corrects the mismatched states. This closed-loop feedback ensures resource state consistency is maintained without requiring manual intervention or node reset, thereby preserving call continuity while resolving resource occupation issues.
2Reliability
If manual detection and correction of wavelength resource mismatches is performed, then resource state consistency can be verified, but the system complexity increases and automatic restoration capability is reduced
Solution Approach 1:
The system enables nodes to automatically detect and correct their own resource state inconsistencies without external intervention. Each node compares its recorded resource states with information received from adjacent nodes, identifies mismatches, and autonomously corrects them. This self-service capability maintains high reliability while minimizing system complexity by distributing the detection and correction functions across individual nodes rather than requiring centralized management.
3Reliability
If frequent resource state detection is performed to ensure consistency, then resource occupation can be detected early, but the detection and correction time increases
Solution Approach 1:
The system performs resource state detection periodically at predetermined intervals rather than continuously or on-demand. This periodic detection mechanism balances the need for timely inconsistency detection with the constraint of minimizing detection and correction time. By scheduling detections at optimal intervals, the system ensures resource state consistency is maintained while avoiding excessive detection overhead and time loss.
Data Source
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AI summary
The present invention provides a method and apparatus for automatically restoring node resource state in the Dense Wavelength Division Multiplexing Based Automatic Switched Optical Network (WSON) system. This method comprises the following steps: using each node in the WSON system as an initiation node and notifying the resource state of the initiation node to a neighboring node; the neighboring node comparing the received resource state of the initiation node with the resource state of the present end; and under the condition that the resource state of the initiation node and that of the neighboring node are inconsistent, according to the actual resource state, determining one of the initiation node and the neighboring node to be the node whose resource is occupied, and automatically releasing the resource of the node. The present invention also provides an apparatus for automatically restoring node resource state in the WSON system. The present invention can effectively detect the problem of inconsistent wavelength resource in the WSON system caused by abnormal status, and can automatically correct the resource state information, release the link bandwidth resource occupied incorrectly, at the same time enhance the fault-tolerant capability and the stability of the WSON system.