Neighbor Cell Measurement Reporting for Faster Handover Preparation

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Solution Overview

Problem

In wireless telecommunications systems, existing technologies face challenges in accurately tracking and reporting changes in the order of neighboring cell signal strengths, leading to issues such as unnecessary resource reservation and delayed handovers due to the network's unawareness of the best cell for handover.

Innovation Solution

A user equipment (UE) is configured to track and maintain an ordered list of neighboring cell measurement quantities, detecting changes in signal strength or quality, and initiate a second measurement report when a configured threshold is met, ensuring timely reporting of the best and potentially second-best cells for handover preparation and execution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the network does not track changes in neighboring cell measurement quantities, then measurement reporting is simpler, but the network becomes unaware of the best cell for handover causing delayed handovers and unnecessary resource reservation

Engineering Contradiction:

Improvehandover reliabilityVSAvoidmeasurement tracking complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The UE performs preliminary actions by continuously tracking and storing measurement quantities for neighboring cells in an ordered list, preparing the information needed for handover decisions before the actual handover event occurs. This allows the network to make informed handover decisions without requiring complex real-time tracking mechanisms.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE provides feedback to the network by reporting changes in the ordered list of neighboring cells and their measurement quantities. This feedback mechanism enables the network to understand the current cell situation and make appropriate handover decisions, improving handover reliability while maintaining manageable complexity through selective reporting.

Inventive Principle:

Principle #23Feedback

2Productivity

If the UE continuously monitors and reports all neighboring cell changes, then handover preparation is improved, but measurement reporting frequency increases causing unnecessary resource consumption

Engineering Contradiction:

Improvehandover preparation efficiencyVSAvoidmeasurement reporting energy consumption

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The UE applies local quality by differentiating between neighboring cells based on their measurement quantities and reporting only the changes that matter for handover decisions. Instead of uniformly monitoring all cells equally, the system focuses on cells that meet certain criteria (e.g., cells entering or leaving the top N positions), reducing unnecessary reporting while maintaining handover preparation efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system dynamically adjusts measurement reporting based on changing conditions. The ordered list of neighboring cells is continuously updated, and reporting is triggered only when changes occur that affect handover decisions. This dynamic approach ensures that the network receives information at the right moments without continuous reporting, optimizing both productivity and energy consumption.

Inventive Principle:

Principle #15Dynamics

3Loss of time

If the network waits for explicit measurement reports before preparing handover, then resource allocation is more accurate, but handover time is delayed

Engineering Contradiction:

Improvehandover timeVSAvoidcell selection accuracy

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The UE performs preliminary actions by continuously maintaining an ordered list of neighboring cells with their measurement quantities, preparing the information needed for handover decisions before the actual handover event occurs. This allows the network to make informed handover decisions without requiring complex real-time tracking mechanisms.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250350986A1Measurement reporting on a change of reported neighboring cells

Publication Date: 2025.11.13 NOKIA TECHNOLOGIES OY

AI summary

A method is provided that includes performing measurements on neighboring cells to obtain second measurement quantities for the neighboring cells. The method includes determining a change of reported ones of the neighboring cells from a first measurement reporting, based on a comparison of the second measurement quantities and first measurement quantities for at least the reported ones of the neighboring cells during the first measurement reporting. Determining the change triggers a second measurement reporting, and the method includes initiating the second measurement reporting of at least some of the second measurement quantities based on the triggering. A corresponding apparatus comprising means for performing the method is also provided.