Mobile Network Signalling Storm Prediction Using NWDAF

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Solution Overview

Problem

Mobile communication networks experience fluctuations in signalling load, leading to spikes known as signalling storms, which can cause service failures and outages due to events like IoT device deployments, resulting in poor user experience and penalties for network operators.

Innovation Solution

Implement a Network Data Analytics Function (NWDAF) using machine learning models to predict and detect abnormal control plane signalling patterns, triggering mitigation mechanisms such as request throttling, scaling, and resource management to prevent network overload.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If control signalling is allowed to flow freely in the mobile communication network, then network service quality is maintained, but signalling storms can cause network overload and service failures

Engineering Contradiction:
Improvenetwork service continuityVSAvoidsignalling storm impact
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary detection and prediction of signalling storms before they cause network overload. The NWDAF collects metrics and uses machine learning models to predict abnormal signalling patterns in advance, enabling proactive mitigation actions to be taken before the harmful effects manifest, thus maintaining network reliability while preventing overload

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The NWDAF acts as an intermediary component between the control plane elements and the network infrastructure. It collects metrics from control plane signalling, analyzes patterns using machine learning, and triggers mitigation mechanisms when abnormal patterns are detected, thereby mediating between free signalling flow and network protection

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If machine learning models are deployed for signalling storm prediction, then detection accuracy is improved, but system complexity increases

Engineering Contradiction:
Improvesignalling storm detection accuracyVSAvoidprediction system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The NWDAF is designed as a multi-functional network function that performs multiple roles: collecting metrics from various control plane elements, storing historical data, training machine learning models, performing real-time prediction, and triggering mitigation mechanisms. This universal design consolidates complexity into a single specialized component rather than distributing it across multiple systems

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The NWDAF employs self-service mechanisms by automatically collecting metrics, training its own machine learning models using historical data, and autonomously making prediction decisions. The system uses its own collected data to improve its prediction accuracy over time through continuous model training, reducing the need for external intervention and manual configuration

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP4604480A1Method for predicting and/or detecting control signalling having a risk of at least partially overloading a mobile communication network
Publication Date: 2025.08.20 NTT DOCOMO INC
  • EP4604480A1 patent drawingFigure 1
  • EP4604480A1 patent drawingFigure 2
  • EP4604480A1 patent drawingFigure 3

AI summary

According to one embodiment, a method for predicting and/or detecting control signalling having a risk of at least partially overloading a mobile communication network is described, comprising gathering metrics about control plane traffic between a first mobile communication network component and one or more second mobile communication network components of the mobile communication network, receiving a notification that the first mobile communication network component has detected an exceptional operational pattern and, in response to receiving the notification, predicting and/or determining, using the metrics, whether there is control signalling having a risk of overloading the first mobile communication network component and/or the one or more second mobile communication network components.