ML Handover Parameter Prediction for Fewer Radio Link Failures

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Solution Overview

Problem

Current cellular communication networks face inefficiencies in handover processes due to manual setting of handover parameter values, which can lead to increased handover failures and radio link failures, especially in dynamic network environments and high-speed terminal device movements.

Innovation Solution

An apparatus and method utilizing machine learning models, specifically a deep Q-learning network and recurrent neural network, to automatically optimize handover parameter values by selecting a subset of relevant parameters, tagging them with historical terminal device information, and training a model to predict optimal handover settings for new terminal devices based on their historical data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual handover parameter setting is used, then network configuration simplicity is maintained, but handover failure rate increases and network resource efficiency deteriorates

Engineering Contradiction:
Improvehandover success rateVSAvoidparameter optimization complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system enables self-service by automatically optimizing handover parameters through machine learning models. The network system autonomously selects optimal parameters, trains models using historical data, and applies predictions without manual intervention, transforming the manual configuration process into a self-optimizing system that improves handover success rates while maintaining operational simplicity

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces the mechanical manual configuration system with an intelligent machine learning-based system. Instead of manual parameter setting and adjustment, the system uses trained models to automatically select and optimize handover parameters, substituting human-operated mechanical processes with automated computational intelligence to improve reliability without increasing operational complexity

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If comprehensive handover parameter optimization is implemented, then handover reliability improves, but computational resources and processing time increase

Engineering Contradiction:
Improvehandover success rateVSAvoidcomputational energy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system applies preliminary action by pre-training machine learning models using historical network data and terminal device information before actual handover operations. The model training and parameter optimization are performed in advance, creating a ready-to-use predictive system that can quickly provide optimal parameters during real-time handovers without intensive computational resources during the critical handover moment

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements partial action by focusing computational resources on training the model with selected historical data subsets and using the trained model for predictions rather than continuously optimizing all parameters in real-time. This approach achieves sufficient handover optimization while avoiding excessive computational energy consumption by applying the model efficiently during actual handover operations

Inventive Principle:
Principle #16Partial or excessive action

3Adaptability or versatility

If dynamic handover parameter adaptation is implemented, then user experience improves, but system complexity increases

Engineering Contradiction:
Improveparameter adaptabilityVSAvoidsystem complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system implements parameter changes by dynamically adjusting handover parameters based on terminal device characteristics and historical performance data. The machine learning model learns optimal parameter combinations from historical information and adapts parameters for different terminal devices and network conditions, enabling dynamic adaptation without requiring complex manual reconfiguration or deep system modifications

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP3876600B1Machine learning based handover parameter optimization
Publication Date: 2024.04.10 NOKIA SOLUTIONS & NETWORKS OY
  • EP3876600B1 patent drawingFigure 1
  • EP3876600B1 patent drawingFigure 2
  • EP3876600B1 patent drawingFigure 3

AI summary

Disclosed is a method comprising obtaining a plurality of handover parameter values, using a first machine learning model to select a subset of handover parameter values from the plurality of handover parameter values, obtaining historical information of a plurality of terminal devices, determining a first set of optimal handover parameter values for the plurality of terminal devices from the subset of handover parameter values, tagging the first set of optimal handover parameter values with the historical information of the plurality of terminal devices to obtain a labelled dataset, and training a second machine learning model with the labelled dataset, wherein the trained second machine learning model is capable of predicting a second set of optimal handover parameter values for a first terminal device based on historical information of the first terminal device.