UE Beam Management for Inter-Cell Mobility

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in managing beams for inter-cell mobility and multiple Transmission Reception Points (mTRP).

Innovation Solution

A user equipment (UE) and base station apparatus that implement multi-beam measurement/reporting enhancements for L1/L2-centric inter-cell mobility and inter-cell mTRP, enabling the UE to receive and transmit Channel State Information (CSI) reports with specific configurations for periodic, semi-persistent, and aperiodic CSI reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multi-beam measurement/reporting enhancements are implemented for inter-cell mobility and mTRP, then communication flexibility and efficiency are improved, but device complexity and system configuration complexity increase

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidsystem configuration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces new configuration parameters (maxNReportedCSIRS-NonServingCells, maxNReportedCSIRS-ServingCell, maxNReportedCSITRx-NonServingCells, maxNReportedCSITRx-ServingCell) that allow flexible control of beam reporting quantities. These parameters enable the system to adapt the number of reported beams according to specific deployment scenarios and UE capabilities, optimizing communication efficiency while managing complexity through configurable thresholds.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamic beam reporting mechanisms where the UE adapts its reporting behavior based on configured maximum values and current channel conditions. The system dynamically adjusts which beams are reported and how frequently, allowing efficient resource utilization while maintaining flexibility for different mobility scenarios and TRP configurations.

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If the maximum total number of beams for non-serving cells is increased in CSI reporting, then beam management precision for inter-cell mobility is improved, but uplink signaling overhead increases

Engineering Contradiction:

Improvebeam management precisionVSAvoiduplink signaling overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent configures maximum values for reported beams (maxNReportedCSIRS-NonServingCells, maxNReportedCSIRS-ServingCell) that balance measurement precision with signaling overhead. These parameters allow the system to report sufficient beam information for accurate inter-cell mobility management while constraining the total quantity of uplink signaling to acceptable levels.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements selective beam reporting where only the top K beams (up to the configured maximum) are reported instead of all measured beams. This partial reporting approach provides sufficient precision for beam management decisions while significantly reducing uplink signaling overhead compared to reporting all measured beams.

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If separate maximum values are configured for serving and non-serving cells, then adaptability for different cell types is improved, but configuration complexity increases

Engineering Contradiction:

Improveadaptability for different cell typesVSAvoidconfiguration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces separate configuration parameters for serving cells (maxNReportedCSIRS-ServingCell, maxNReportedCSITRx-ServingCell) and non-serving cells (maxNReportedCSIRS-NonServingCells, maxNReportedCSITRx-NonServingCells). This allows different quality requirements and reporting thresholds to be applied locally to each cell type, optimizing performance for both serving and neighboring cell scenarios while maintaining clear separation of concerns in the configuration.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250125849A1User equipments, base stations and methods for beam management with inter-cell mobility

Publication Date: 2025.04.17 SHARP KK

AI summary

A user equipment (UE) that communicates with a base station apparatus is described. The UE may include receiving circuitry configured to receive a radio resource control (RRC) message comprising first information used for indicating multi-beam measurement/reporting enhancements for L1/L2-centric inter-cell mobility and inter-cell multiple Transmission Reception Points (mTRP) is enabled. The receiving circuitry may also be configured to receive an RRC message comprising second information used for indicating a maximum total number (K) of beams associated with all corresponding non-serving cells reported in a single Channel State Information (CSI) reporting instance. The UE may also include transmitting circuitry configured to transmit, to the base station, a CSI report.