Network Management Server Recovery Plane Pre-calculation
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Solution Overview
Problem
Existing network management systems face challenges in quickly recovering communication systems with larger scales due to high processing loads and complexities in determining and setting optimal standby paths when failures occur.
Innovation Solution
A network management server that pre-calculates and stores recovery plane information for various failure patterns, allowing for quick identification and notification of recovery paths to communication apparatus, reducing the load required for path recovery by using a multicast network for management control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standby paths are determined and set one by one when a failure occurs, then path recovery can be achieved, but the processing time and load increase significantly
Solution Approach 1:
The patent pre-calculates and stores multiple standby paths for each active path before any failure occurs. When a failure is detected, the system immediately switches to a pre-computed standby path without performing real-time path calculation, thereby dramatically reducing recovery time while maintaining reliable path recovery capability.
2Reliability
If all paths passing through failure areas are processed to determine optimal standby paths, then optimal recovery paths can be selected, but the processing complexity and load increase
Solution Approach 1:
The system pre-calculates standby paths for all possible failure scenarios and stores them in advance. This eliminates the need for complex real-time analysis of all paths when a failure occurs, as the optimal standby path is already determined and stored for immediate retrieval.
Solution Approach 2:
The patent divides the network into multiple areas and pre-calculates standby paths for each possible area failure pattern. This segmentation allows the system to handle complex network topologies by breaking down the overall path calculation into manageable area-specific segments, reducing processing complexity.
3Reliability
If individual path settings are adjusted one by one during failure recovery, then path recovery can be achieved, but the recovery speed decreases
Solution Approach 1:
The patent merges multiple individual path settings into a unified standby path configuration that is pre-calculated and stored. When a failure occurs, the entire standby path configuration is applied at once rather than adjusting individual paths sequentially, thereby significantly improving recovery speed while maintaining reliable path recovery.
4Ease of operation
If standby path information is calculated and stored for each node, then each node can independently recover paths, but the storage requirements and notification overhead increase
Solution Approach 1:
The patent creates a unified standby path configuration that serves all nodes in the network simultaneously. This universal configuration reduces the total volume of path information that needs to be stored and notified to each node, while still enabling independent path recovery at each node through the shared standby path data.
Data Source
AI summary
A network management server stores, in terms of a transmission path within the network, each occurrence pattern of a failure occurrence area in which a failure has occurred in a communication apparatus through which the transmission path passes. Information for identifying a recovery plane serving as a set of recovery paths corresponding to each occurrence pattern and information for identifying the communication apparatus through which each of the recovery paths passes is also stored. When a failure occurs in any one of the plurality of areas, whether or not the failure corresponds to any one of the failure occurrence patterns, the information for identifying the recovery plane corresponding to the identified failure occurrence patterns is acquired; and the communication apparatus through which each of the recovery paths included in the recovery plane passes is notified of the information for identifying the recovery plane acquired.