Shared-Router Estimation Using Slice Correlation to Detect Silent Failures
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Solution Overview
Problem
In communication systems with shared routers across multiple network slices, silent failures affecting multiple function elements occur without detectable router issues, making it difficult to identify the cause of performance deterioration.
Innovation Solution
A router estimation system and method that calculates the degree of correlation increase between slice communications using network slices, identifying shared routers as causes of performance deterioration by determining if the correlation increase satisfies a given condition based on performance index values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If shared routers are used across multiple network slices to improve resource utilization, then productivity is improved, but difficulty of detecting and measuring worsens when silent failures occur
Solution Approach 1:
The patent implements feedback mechanisms by continuously monitoring performance index values from multiple network slices and using correlation analysis to detect silent failures. The system collects performance data, calculates correlation coefficients between different slices, and provides feedback when abnormal correlation patterns indicate a shared router failure, enabling detection without direct router monitoring.
Solution Approach 2:
The patent introduces an intermediary approach by using performance index correlations as a mediator to indirectly detect router failures. Instead of directly monitoring the shared router, the system measures performance metrics across multiple network slices and uses the correlation between these metrics to infer router status, solving the detection difficulty.
2Reliability
If separate router groups are used for each network slice to improve reliability, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by enabling a single router to serve multiple network slices simultaneously through the shared router architecture. This multi-functional approach allows one router group to handle traffic from multiple slices, reducing the total number of routers needed while maintaining the ability to detect failures through correlation analysis.
Solution Approach 2:
The patent uses a virtual copying approach by creating virtual router instances or logical router groups for each network slice that share physical hardware. This allows separate router configurations and management for each slice while physically sharing resources, balancing reliability and complexity.
3Measurement precision
If performance monitoring is enhanced to detect silent failures, then measurement precision is improved, but loss of energy increases
Solution Approach 1:
The patent applies partial action by selectively monitoring only the necessary performance index values required for correlation analysis, rather than implementing comprehensive monitoring of all possible metrics. The system calculates correlation coefficients for specific key performance indicators, achieving sufficient detection precision with reduced energy expenditure compared to full-system monitoring.
Data Source
AI summary
Provided are a router estimation system and a router estimation method which enable accurate estimation of a router that is a cause of silent failures in network slices. When it is determined that a degree of correlation increase linked to a pair of a first slice communication and a second slice communication satisfies a given condition, a policy manager (90) estimates at least one router included in both of a first router group, which is a group of routers identified based on router group data as routers located on a route of the first slice communication, and a second router group, which is a group of routers identified based on the router group data as routers located on a route of the second slice communication, as a router that is a cause of deterioration of performance of a first function element and a second function element.