Network Management Device Group Error Detection
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Solution Overview
Problem
Existing network management systems face challenges in determining whether connection failures are due to network issues or terminal device problems, as they rely solely on response time comparisons without distinguishing between the two, and require manual or automatic threshold value determination for each device, incurring additional expenses.
Innovation Solution
A network management device and method that divides terminal devices into groups, measures response times, and uses individual and group error determiners to differentiate between device-specific and network-wide errors by comparing current and previous average response times with predetermined threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If response time threshold is determined manually or automatically for each terminal device, then failure detection accuracy is improved, but preliminary preparation expense increases
Solution Approach 1:
The patent segments terminal devices into multiple groups based on their network characteristics and response time profiles. By dividing the fleet into groups (e.g., geographic regions, device types, network segments), the system can apply group-specific thresholds rather than device-by-device configuration, reducing preparation complexity while maintaining detection accuracy.
Solution Approach 2:
The system automatically determines response time thresholds by analyzing historical response time data from each terminal device and group. The threshold determination is performed autonomously through statistical analysis of collected data, eliminating the need for manual configuration and reducing preliminary preparation expenses.
2Ease of operation
If failure detection is based solely on response time comparison with threshold, then detection simplicity is improved, but failure cause identification accuracy deteriorates
Solution Approach 1:
The patent segments failure detection into two distinct analysis layers: individual device-level detection and group-level detection. This segmentation enables the system to identify whether a failure is isolated to a single device or affects an entire group, thereby determining whether the cause is device-specific or network-related while maintaining simple threshold-based detection mechanisms.
Solution Approach 2:
The patent introduces group average response time as an intermediary metric between individual device response time and network status determination. By comparing individual device performance against both absolute thresholds and group-relative performance, the system can infer failure causes without complex direct causality analysis.
Data Source
AI summary
A network management device determines at least one of that an individual error occurs in a target terminal device when a difference between (i) a response time for the target terminal device and (ii) an average response time that is an average value of the response time for each of two or more terminal devices belonging to a group to which the target terminal device belongs is larger than a first predetermined value, and that a group error occurs in a target group when a difference between (i) a current average response time that is an average value of the response time and (ii) a previous average response time that is an average value of a previous response time for two or more terminal devices belonging to the target group is larger than a second predetermined value, the previous response time being immediately prior to the response time.