Dynamic Radio Access Technology Selection for Network Overload

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Solution Overview

Problem

Current radio access technology (RAT) selection methods are limited in reliability and flexibility, often resulting in suboptimal user experience due to static or inadequate RAT choices, particularly in scenarios where 5G standalone (SA) networks are overloaded, leading to performance degradation compared to non-standalone (NSA) modes.

Innovation Solution

A system and method that dynamically analyze performance data to switch between different radio access technologies (RATs), such as from 5G SA to LTE/5G NSA or Wi-Fi, based on real-time quality of service (QoS) and quality of experience (QoE) metrics, allowing for adaptive network selection to enhance communication service quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If 5G SA is selected as the default RAT, then network slicing and advanced security features are enabled, but user performance degrades when the SA network is overloaded

Engineering Contradiction:

Improvenetwork reliabilityVSAvoiduser performance

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements dynamic RAT selection by continuously monitoring network load conditions and switching between 5G SA and alternative RATs (such as 4G LTE or 5G NSA) based on real-time performance metrics. This dynamic adaptation allows the system to maintain optimal user performance while preserving the reliability benefits of 5G SA during normal conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters by switching between different RAT modes (SA/NSA) and adjusting selection criteria based on network load thresholds, available bandwidth, and performance metrics. This parameter flexibility enables the system to optimize the balance between network reliability and user performance under varying conditions.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If static RAT selection methods are used, then device complexity is reduced, but user experience degrades due to suboptimal RAT choices

Engineering Contradiction:

Improveselection mechanism complexityVSAvoiduser experience

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The system performs self-service by automatically monitoring network conditions, evaluating performance metrics, and making RAT selection decisions without requiring complex user configuration or manual intervention. The device autonomously adjusts its network connection based on real-time conditions, improving user experience while keeping the interface simple.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements feedback mechanisms by continuously monitoring QoS parameters (throughput, latency, packet loss) and using this information to adjust RAT selection decisions. This closed-loop approach ensures that the system learns from actual performance data and makes increasingly optimal selection decisions over time.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250098007A1Apparatuses and methods for facilitating enhancements of a user experience in respect of a radio access technology selection and utilization

Publication Date: 2025.03.20 AT&T INTELLECTUAL PROPERTY I L P

AI summary

Aspects of the subject disclosure may include, for example, establishing a communication session utilizing a first radio access technology (RAT), obtaining data associated with a performance of the communication session via the first RAT, analyzing the data to determine that the performance of the communication session may be enhanced utilizing a second RAT that is different from the first RAT, resulting in a first determination, and based on the first determination, causing the communication session to utilize the second RAT. Other embodiments are disclosed.