RRC Idle Mobility Measurement Optimization

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Solution Overview

Problem

In wireless communication technologies, particularly in RRC idle or inactive states, user equipment (UE) faces increased power consumption due to the need to monitor multiple frequencies for cell reselection, which prolongs wake-up duration and affects synchronization signal measurements.

Innovation Solution

A mobility measurement method that adjusts measurement attribute information of inter-frequency frequencies based on measurement results and configuration information from a network device, distinguishing between first and second performance frequencies with different measurement requirements, thereby reducing unnecessary radio resource management measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UE monitors multiple inter-frequency frequencies for cell reselection, then cell reselection reliability is improved, but power consumption increases

Engineering Contradiction:
Improvecell reselection reliabilityVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies local quality by differentiating between first performance frequencies and second performance frequencies, where first performance frequencies require monitoring of multiple SSBs while second performance frequencies require monitoring of only one SSB. This localized differentiation in measurement requirements reduces overall power consumption while maintaining cell reselection reliability through selective frequency monitoring based on actual signal conditions.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent changes the measurement parameters dynamically by adjusting the number of SSBs to be monitored based on frequency performance characteristics. For second performance frequencies, the measurement requirement is reduced to one SSB, while first performance frequencies require multiple SSBs. This parameter adjustment resolves the contradiction by adapting measurement intensity to actual frequency quality, reducing power consumption without compromising reliability.

Inventive Principle:
Principle #35Parameter changes

2Measurement precision

If UE monitors seven inter-frequency frequencies, then measurement coverage is improved, but wake-up duration increases

Engineering Contradiction:
Improvemeasurement coverageVSAvoidwake-up duration
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies local quality by categorizing frequencies into first performance frequencies requiring full measurement (multiple SSBs) and second performance frequencies requiring reduced measurement (one SSB). This localized measurement approach ensures adequate measurement coverage for critical frequencies while reducing wake-up duration through selective monitoring of less critical frequencies.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent applies partial action by monitoring only one SSB for second performance frequencies instead of the full multiple SSBs required for first performance frequencies. This partial measurement approach maintains sufficient measurement coverage for cell reselection while significantly reducing wake-up duration and processing requirements.

Inventive Principle:
Principle #16Partial or excessive action

3Measurement precision

If inter-frequency SMTC is not aligned with DRX wake-up time, then synchronization accuracy is improved, but power consumption increases

Engineering Contradiction:
Improvesynchronization accuracyVSAvoidpower consumption
Core Design Contradiction:
Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent changes the measurement parameters by reducing the number of SSBs to monitor for second performance frequencies, which directly addresses the power consumption issue when SMTC is not aligned with DRX wake-up time. By requiring only one SSB monitoring for certain frequencies, the patent reduces the waiting time in light sleep mode and associated power consumption while maintaining sufficient synchronization accuracy through selective frequency monitoring.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS12212996B2Mobility measurement method in RRC idle or inactive state and device
Publication Date: 2025.01.28 VIVO MOBILE COMM CO LTD
  • US12212996B2 patent drawing
  • US12212996B2 patent drawing
  • US12212996B2 patent drawing

AI summary

Embodiments of the present disclosure disclose a mobility measurement method in a radio resource control (RRC) idle or inactive state and a device. The method includes: adjusting measurement attribute information of inter-frequency frequencies, according to an inter-frequency measurement result and/or a serving cell measurement result of a terminal device and configuration information from a network device, where the measurement attribute information of the inter-frequency frequencies includes at least one of: a frequency type, a quantity of frequencies of different frequency types, or a measurement requirement of frequencies of different frequency types, the frequency type includes a first performance frequency or a second performance frequency, and a measurement requirement of the second performance frequency is lower than a measurement requirement of the first performance frequency.