Mobility-Aware Beam Measurement Relaxation for RLM and BFD

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in beam management due to excessive reference signal measurements, particularly in scenarios where mobility conditions are stable, leading to unnecessary power consumption and resource utilization.

Innovation Solution

Implementing relaxation criteria based on mobility conditions for radio link monitoring (RLM) and beam failure detection (BFD) by indicating when reference signal measurements can be reduced, allowing UEs and network nodes to optimize their operations based on satisfaction of specific mobility conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If reference signal measurements are performed frequently for RLM and BFD, then reliability of beam management is improved, but power consumption and resource utilization increase

Engineering Contradiction:

Improvebeam management reliabilityVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by making the measurement periodicity adaptive rather than fixed. The network node configures different periodicities based on mobility conditions - shorter periodicity when UE is moving (high mobility) and longer periodicity when UE is stationary (low mobility). This dynamic adjustment resolves the contradiction by maintaining reliable beam management when needed while reducing power consumption when mobility conditions permit.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of measurement periodicity based on mobility conditions. By configuring relaxation criteria that modify the periodicity of reference signal measurements according to whether the UE satisfies mobility conditions, the system optimizes the balance between reliability and power consumption. When mobility conditions are satisfied, measurements are performed less frequently, reducing power usage while maintaining adequate reliability.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If reference signal measurements are performed frequently for RLM and BFD, then beam failure detection accuracy is improved, but resource utilization increases

Engineering Contradiction:

Improvebeam failure detection accuracyVSAvoidreference signal resources

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The system dynamically adjusts the frequency of reference signal measurements based on mobility conditions. When the UE is stationary and mobility conditions are satisfied, measurements are performed less frequently, reducing resource utilization. When mobility conditions indicate the UE is moving, measurements are performed more frequently to maintain detection accuracy. This dynamic approach resolves the contradiction between measurement precision and resource consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the measurement periodicity parameter based on whether mobility conditions are satisfied. By configuring relaxation criteria that allow longer periodicity when mobility conditions are met, the system reduces the quantity of reference signal resources consumed while maintaining adequate beam failure detection accuracy. The parameter adjustment ensures resources are used efficiently without compromising detection capability when needed.

Inventive Principle:

Principle #35Parameter changes

3Use of energy by moving object

If measurement periodicity is reduced for stationary UEs, then power consumption is decreased, but beam monitoring reliability may deteriorate

Engineering Contradiction:

ImproveUE power consumptionVSAvoidbeam monitoring reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent changes the measurement periodicity parameter based on mobility conditions, allowing longer periodicity (reduced frequency) when the UE is stationary. This parameter change reduces power consumption for stationary UEs while the relaxation criteria ensure that reliability is maintained by only applying the extended periodicity when mobility conditions confirm the UE is not moving, which implies beam conditions are stable.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system enables stationary UEs to self-adjust their measurement behavior based on configured relaxation criteria. When mobility conditions indicate the UE is stationary, the UE automatically performs measurements less frequently, reducing its own power consumption. This self-service approach allows each UE to optimize its power usage based on its own mobility state while maintaining adequate monitoring reliability.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12464387B2Beam measurement relaxation criteria and configuration

Publication Date: 2025.11.04 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, an indication of a relaxation criterion associated with one or more reference signals used in performing at least one of radio link monitoring (RLM) or beam failure detection (BFD), wherein the relaxation criterion includes a mobility condition associated with the UE. The UE may perform, based at least in part on satisfying the mobility condition, one or more measurements using one or more of the reference signals and based at least in part on the relaxation criterion. Numerous other aspects are described.