Beam-Based RRM Reporting for Robust Low-Power Mobility

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Solution Overview

Problem

Conventional RRM measurements in wireless communication systems face issues of robustness and energy consumption, particularly when rapid link deterioration occurs, and existing solutions either lack robustness or require full wireless device measurements, leading to inefficiencies.

Innovation Solution

Implementing machine learning-enhanced RRM measurements that establish relationships between beam management CSI-RS and RRM measurements for serving and neighbor cells, allowing the wireless device to estimate RRM metrics and event occurrences, reducing the need for frequent measurements and conserving energy by keeping the RF stage in a low-power state during non-overlapping measurement occasions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If conventional RRM measurements are performed at a slow rate, then energy consumption is reduced, but robustness deteriorates when link conditions change rapidly

Engineering Contradiction:

Improveenergy consumptionVSAvoidrobustness

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent introduces beam management measurements as an intermediary mechanism that provides high-resolution spatial information about the wireless channel. These measurements act as a mediator between the fast-changing channel conditions and the slower RRM measurement process, enabling the system to detect rapid link deterioration without requiring continuous full RRM measurements, thus maintaining robustness while reducing energy consumption.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent performs preliminary beam management measurements continuously to establish a baseline understanding of channel conditions before triggering full RRM measurements. By pre-characterizing the channel through beam-level measurements, the system can predict when rapid deterioration might occur and proactively initiate RRM measurements, improving robustness without requiring constant measurement activity.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If ML-enhanced RRM measurements are implemented, then robustness is improved, but full RRM measurements are still necessary, leading to high energy consumption

Engineering Contradiction:

ImproverobustnessVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts and utilizes beam management measurement data separately from full RRM measurements. By taking out the essential spatial channel information from the complete RRM measurement process and using it independently for robustness assessment, the system can maintain reliability while avoiding the energy cost of performing full RRM measurements continuously.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs partial RRM measurements selectively based on beam management measurement triggers rather than excessive continuous measurements. By applying partial measurement action only when beam-level indicators suggest potential issues, the system achieves sufficient robustness with significantly reduced energy consumption compared to full continuous measurement approaches.

Inventive Principle:

Principle #16Partial or excessive action

3Productivity

If conditional HO with autonomous wireless device decision is implemented, then reporting is minimized, but HO robustness decreases due to reliance on individual measurements

Engineering Contradiction:

Improvereporting efficiencyVSAvoidHO robustness

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent merges beam management measurements with RRM measurement results to form a combined assessment basis for handover decisions. By combining high-resolution spatial information from beam measurements with traditional RRM metrics, the system provides the wireless device with more robust input data for autonomous decisions, improving HO robustness without increasing reporting overhead.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements feedback mechanisms where beam management measurement results are continuously fed back to inform RRM measurement timing and handover decision-making. This feedback loop enables the system to adapt measurement activity based on actual channel conditions, allowing autonomous handover decisions to be made with better information while maintaining efficient reporting patterns.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260059499A1RRM mobility reporting based on beam management measurements

Publication Date: 2026.02.26 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method, system and apparatus are disclosed. At least one embodiment includes a wireless device, WD, configured to communicate with a network node. the WD is configured to, and/or includes a radio interface and/or processing circuitry configured to receive a radio resource management, RRM, report configuration. The wireless device is further configured to estimate at least one RRM metric for each of a first cell and second cell based on Layer 1, L1, measurement, e.g., a beam management, BM, measurement, of the first cell and a pre-determined relationship between the L1 measurement and at least one RRM measurement The wireless device is further configured to perform a RRM procedure based on the estimated at least one RRM metric and the RRM report configuration.