Dynamic Event Correlation Window for DSL Network Management
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Solution Overview
Problem
Existing methods for setting the size of an event correlation time window in network management are inflexible and may either impose unnecessary memory or processing requirements or exclude relevant events, lacking adaptability to dynamic network conditions.
Innovation Solution
The method involves collecting information on the interval length between transmission of Operations, Administration, and Maintenance (OAM) packets across network nodes and setting the event correlation time window size larger than the largest interval length, allowing for dynamic adaptation based on network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the event correlation time window is set to a large fixed size, then all relevant events are likely to be included in the correlation analysis, but this imposes unnecessary requirements in terms of memory and processing power on the network management node
Solution Approach 1:
The patent applies dynamics by transitioning from a static fixed-size time window to a dynamic adaptive time window that automatically adjusts its size based on real-time network conditions. The system monitors event rates, inter-arrival times, and network state changes to dynamically resize the correlation window, ensuring it is large enough to capture all relevant events for root cause analysis while remaining small enough to avoid unnecessary memory and processing overhead.
2Device complexity
If the event correlation time window is set to a small fixed size, then memory and processing power requirements are reduced, but events which would be of use during root cause analysis are excluded
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors network event patterns, inter-arrival times, and correlation outcomes to adjust the time window size. When events are detected that suggest a broader correlation scope is needed (e.g., increasing event rates, detected root cause patterns), the system expands the window. When event rates decrease or stability is detected, the window contracts, ensuring complete event collection when needed while minimizing resource usage during stable periods.
3Ease of operation
If the event correlation time window size is fixed, then the system is simple to operate, but it lacks adaptability to dynamic network conditions and changing event patterns
Solution Approach 1:
The patent applies self-service by enabling the event correlation system to automatically adjust its own time window size without requiring manual configuration or expert intervention. The system autonomously monitors network conditions, analyzes event patterns, and dynamically resizes the correlation window based on detected changes in network state, event rates, and inter-arrival times, making the system both simple to operate and highly adaptive.
4Ease of manufacture
If a fixed time interval and maximum number of events are used to determine the correlation window, then the method is easy to implement, but it relies on heuristic estimation and is difficult to adapt to particular network configurations without expert knowledge
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting key parameters of the correlation window (size, time interval, event thresholds) based on actual network conditions rather than using fixed heuristic values. The system monitors inter-arrival times, event rates, and network state parameters to automatically tune the correlation window parameters, eliminating the need for expert knowledge while maintaining adaptability to specific network configurations.
Data Source
AI summary
Transmitting and receiving arrangements and methods in a Digital Subscriber Line (DSL) system having a plurality of modems and vectored transmission capability. A first part of an available frequency band is reserved for vectored DSL transmission and reception using modems operating in the first part of the frequency band. The remaining, second, part of the available frequency band is reserved for both vectored and non-vectored transmission using modems operating in the second part of the frequency band.