5G NR RRM Measurement Intervals for Mobility-Aware Power Saving
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Solution Overview
Problem
Existing 5G New Radio (NR) user equipment (UE) technologies face challenges in balancing power saving and mobility performance during transitions between different mobility scenarios, particularly in low mobility or edge-away conditions, leading to inefficient radio resource management (RRM) configurations.
Innovation Solution
The UE performs RRM measurements with longer intervals and relaxes certain RRM requirements based on mobility scenarios, transitioning between relaxed, moderate, and tight configurations to optimize power saving and mobility performance, using signal strength and quality thresholds to determine power saving modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE performs RRM measurements with standard intervals in all mobility scenarios, then mobility performance is maintained, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the RRM measurement interval adaptive rather than fixed. The UE dynamically adjusts the measurement interval based on its current mobility scenario (low mobility, cell-center, or combined scenario), transitioning between different measurement frequencies to balance power saving and mobility performance requirements.
Solution Approach 2:
The patent changes the measurement interval parameter based on mobility conditions. When the UE determines it is in a low mobility state, cell-center position, or both, it extends the RRM measurement interval beyond the standard configuration, directly modifying this key parameter to reduce power consumption while maintaining acceptable mobility performance.
2Use of energy by moving object
If the UE extends RRM measurement intervals to save power, then power efficiency improves, but mobility management capability deteriorates
Solution Approach 1:
The patent applies local quality by implementing different measurement intervals for different mobility scenarios rather than a uniform approach. The UE assesses its specific scenario (low mobility, cell-center, or combined) and applies the appropriate measurement interval, ensuring that power saving is achieved only where mobility performance allows.
Solution Approach 2:
The patent makes the measurement capability dynamic by allowing the UE to transition between different RRM configuration states (relaxed, moderate, tight) based on current mobility conditions. This dynamic adjustment ensures mobility management capability is maintained when needed while enabling power efficiency improvements when conditions permit.
3Use of energy by moving object
If the UE uses relaxed RRM configuration for power saving, then energy consumption decreases, but measurement precision reduces
Solution Approach 1:
The patent changes the measurement precision parameter adaptively based on mobility scenario. In relaxed configurations for low mobility or cell-center scenarios, the measurement interval is extended which reduces instantaneous precision but maintains adequate accuracy for the current mobility conditions. The UE can transition to tighter configurations with standard measurement intervals when mobility performance requirements increase.
Solution Approach 2:
The patent applies partial action by implementing relaxed measurement requirements only partially - specifically for UEs in low mobility states or cell-center positions. The relaxation is not universal but selectively applied where it does not significantly impact mobility performance, maintaining full measurement precision when needed while reducing it only when conditions allow.
Data Source
AI summary
A user equipment (UE) is connected to a 5G New Radio (NR) network via a serving cell. The UE performs radio resource management (RRM) measurements on the serving cell, determines whether the UE satisfies power saving criteria for a first, second, or third mobility scenario while in a Radio Resource Control (RRC) idle state or RRC inactive state, wherein, when the UE is in the first or second mobility scenario, the UE performs RRM measurements with longer intervals relative to RRM measurements performed in a non-power-saving mode and wherein, when the UE is in the third scenario, the UE performs RRM measurements for neighbor cells with longer intervals relative to RRM measurements performed in a non-power-saving mode and determines a UE RRM configuration when the UE transitions from any of the power saving scenarios or the non-power-saving mode to any other power saving scenarios or the non-power-saving mode.