Wireless Handover Feedback for Unnecessary Inter-System Switching

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Solution Overview

Problem

In 5G mobile communication networks, unnecessary handovers between different radio access technologies, such as from NR to E-UTRA, occur despite sufficient coverage quality, affecting user experience and resource utilization, as current systems cannot determine if a handover is unnecessary.

Innovation Solution

A method where network devices exchange measurement object information and results to identify unnecessary handovers, adjusting parameters like handover thresholds and policies to reduce such handovers, and continue measurements post-handover to confirm the necessity of the switch.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the network determines handover based on signal strength alone, then handover decision is simple, but inter-system unnecessary handover occurs affecting user experience

Engineering Contradiction:

Improvehandover decision simplicityVSAvoiduser experience

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the terminal device reports measurement results to the network device, and the network device sends handover indication information back to the terminal. This feedback loop enables the network to make informed handover decisions based on actual measurement data rather than simple signal strength thresholds, thereby reducing unnecessary handovers while maintaining operational simplicity.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces preliminary measurement and evaluation actions before handover execution. The terminal device performs measurements on target cells and reports results to the network device in advance. The network device then evaluates whether handover is necessary by comparing measurement results against thresholds and determining if handover indication information should be sent. This preliminary action prevents unnecessary handovers from occurring.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If the network cannot determine unnecessary handover, then handover control is simple, but resource utilization deteriorates due to frequent unnecessary handovers

Engineering Contradiction:

Improvehandover control complexityVSAvoidresource utilization

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent establishes a feedback mechanism where measurement results are reported to the network device, which then determines whether handover indication information should be sent. This feedback enables the network to identify and prevent unnecessary handovers, improving resource utilization by keeping terminal devices on appropriate networks rather than forcing unnecessary inter-system handovers.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The terminal device autonomously performs measurements on target cells and reports results to the network device without requiring complex network-side measurement capabilities. This self-service approach allows the network to make informed decisions using simple comparison logic against reported measurements, improving resource utilization without significantly increasing device complexity.

Inventive Principle:

Principle #25Self-service

3Reliability

If handover threshold is lowered to prevent unnecessary handover, then user experience improves, but handover latency increases

Engineering Contradiction:

Improveuser experienceVSAvoidhandover latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements preliminary measurement and evaluation actions before handover execution. The terminal device performs measurements and reports results to the network device in advance. The network device then evaluates whether handover is necessary by comparing measurement results against thresholds. This preliminary action allows for more conservative threshold settings without increasing latency, as the evaluation happens before handover initiation rather than during handover execution.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The feedback mechanism enables the network to make precise handover decisions based on actual measurement data rather than relying on conservative thresholds. By receiving real measurement results from the terminal device, the network can accurately determine when handover is necessary, improving user experience without requiring artificially lowered thresholds that would increase handover frequency and latency.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12490158B2Wireless network communication method, network device, and terminal device

Publication Date: 2025.12.02 HUAWEI TECH CO LTD

AI summary

The present disclosure discloses example wireless network communication methods and network devices. One example method includes sending a first message to a second network device by a first network device, where the first message includes measurement object information of the first network device. A second message sent by the second network device is received by the first network device, where the second message includes indication information or measurement result information of the first network device, and the indication information indicates whether an inter-system unnecessary handover of a terminal device occurs. The first network device determines, based on the second message, whether the inter-system unnecessary handover of the terminal device occurs.