Multi-Panel UE Signal Measurement for Handover Robustness

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Solution Overview

Problem

In communication networks, especially at higher frequencies, the directivity of antenna arrays leads to limited coverage and power consumption issues, and existing handover mechanisms struggle with abrupt blockages, resulting in radio link failures due to inadequate measurement reporting and handover preparation.

Innovation Solution

The implementation of a communication control mechanism that uses multiple signal receiving portions (antenna panels) to measure signal quality and apply panel-specific offset values for improved measurement reporting, enabling earlier detection of relevant cells and preparing for conditional handovers, even when serving panels are blocked.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple antenna panels are used to improve coverage and reliability, then handover robustness is enhanced, but device complexity increases

Engineering Contradiction:

Improvehandover robustnessVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The UE is divided into multiple independent antenna panels, each capable of autonomous signal reception and measurement. Each panel maintains independent measurement capabilities for serving and non-serving cells, allowing the system to achieve improved handover robustness through distributed measurement while managing complexity by modularizing the antenna structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary measurements on non-serving cells using non-serving panels before handover is actually needed. By continuously measuring and reporting cell qualities in advance, the network can prepare handover configurations proactively, reducing the complexity of real-time handover decision-making and improving overall handover robustness

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If measurement reporting includes all cells to improve measurement precision, then handover accuracy is improved, but loss of time increases due to processing overhead

Engineering Contradiction:

Improvehandover accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

Different measurement precision and reporting frequencies are applied to different cell types based on their importance. Serving cells receive continuous high-precision measurement, while non-serving cells are measured and reported selectively based on whether they meet certain quality thresholds. This localized quality approach improves handover accuracy for critical cells while reducing overall processing time

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of continuously measuring and reporting all cells with equal precision, the system performs partial measurements focused on the most relevant cells. Non-serving panels measure non-serving cells partially (only when above threshold), while serving panels continuously measure serving cells with high precision, optimizing the balance between handover accuracy and processing time

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If non-serving panels measure non-serving cells to improve adaptability, then handover preparation is improved, but use of energy increases

Engineering Contradiction:

Improvehandover preparation capabilityVSAvoidenergy consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Non-serving panels perform measurements on non-serving cells periodically or event-triggered rather than continuously. Measurements are initiated based on specific conditions such as serving cell quality degradation or periodic scheduling, allowing the system to maintain handover preparation capability while significantly reducing energy consumption compared to continuous measurement

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Non-serving panels autonomously determine when to perform measurements based on local conditions such as detected signal thresholds or panel-specific blockage detection. Each panel independently decides whether measurement is necessary, eliminating the need for continuous network-controlled measurement commands and reducing overall energy consumption while maintaining adaptability

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12200522B2Communication control mechanism for multi-panel UE

Publication Date: 2025.01.14 NOKIA TECHNOLOGIES OY

AI summary

An apparatus for use by a UE configured to conduct a communication in a communication network. The apparatus is configured to receive and process signals from the communication network via signal receiving portions, wherein one of the signal receiving portions is a serving cell signal receiving portion used for connecting to the communication network via a serving cell, and another of the signal receiving portions is a non-serving cell signal receiving portion being not used for connecting to the communication network. A signal receiving portion specific offset value is obtained for each of the signal receiving portions. Signal quality values for signals received by the signal receiving portions from the communication network are measured, wherein the cells include the serving cell. A measurement report is sent to the communication network on the basis of the results of the signal quality measurements and the offset values for the signal receiving portions.