Conditional Handover Timing Using Current and Predicted Radio Conditions

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Solution Overview

Problem

Existing conditional handover (CHO) methods in wireless communication are resource-intensive and lack accuracy in predicting optimal handover times due to reliance on current or anticipated radio conditions alone.

Innovation Solution

Implement a method in a wireless transmit/receive unit (WTRU) that receives predictive measurement configuration and handover configuration information, allowing it to determine when current and predicted radio conditions meet specified thresholds for executing handovers or sending measurement reports.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conditional handover is implemented to enable proactive handover execution, then handover robustness is improved, but resource consumption increases as target cells must reserve resources until handover execution or cancellation

Engineering Contradiction:

Improvehandover robustnessVSAvoidresource consumption

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies preliminary action by having the WTRU evaluate and prepare handover conditions in advance based on predicted radio conditions, rather than reacting after conditions deteriorate. The WTRU continuously monitors current conditions and compares them with predicted future conditions to proactively determine optimal handover timing, reducing the need for continuous resource reservation while maintaining handover robustness.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If handover decisions are based only on current radio conditions, then decision simplicity is maintained, but handover timing accuracy deteriorates causing premature or delayed transitions

Engineering Contradiction:

Improvedecision simplicityVSAvoidhandover timing accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies dynamics by transitioning from static handover decisions based on current conditions to dynamic decisions that incorporate predicted future conditions. The WTRU dynamically adjusts handover timing based on the evolution of radio conditions, allowing for more precise timing that adapts to changing network conditions rather than relying on fixed threshold-based decisions.

Inventive Principle:

Principle #15Dynamics

3Loss of time

If handover decisions are based only on anticipated radio conditions, then proactive handover timing is achieved, but decision accuracy deteriorates due to inability to verify actual current conditions

Engineering Contradiction:

Improvehandover timing optimizationVSAvoiddecision accuracy

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The patent applies feedback by having the WTRU continuously monitor actual current radio conditions and compare them with predicted conditions. This feedback mechanism allows the WTRU to verify whether predicted conditions materialize and adjust handover decisions accordingly, ensuring both proactive timing and decision accuracy by validating predictions against actual measurements.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260012874A1Methods, architectures, apparatuses and systems for measurement reporting and conditional handover

Publication Date: 2026.01.08 INTERDIGITAL PATENT HOLDINGS INC

AI summary

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products directed to control throughput performance. In an embodiment, a method, implemented in a wireless transmit/receive unit (WTRU), comprises receiving, from a network, a measurement configuration information comprising target cells to be measured and a conditional event configuration information for triggering a CHO command; monitoring the current radio conditions of target and serving cells; performing prediction of the radio conditions of target and serving cells; and in response to current radio conditions of a target cell and/or serving cell fulfilling one or more associated radio condition threshold(s) and in response to the predicted radio conditions of a target and/or serving cell fulfilling one or more associated radio condition, executing the CHO command.