NB-IoT UE Adaptive Neighbor Link Measurement
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Solution Overview
Problem
In wireless communication networks, user equipment (UE) faces challenges in determining when to perform neighbor link measurements, leading to inefficient power usage due to either excessive or insufficient measurements, which can result in accessing base stations with poorer signal quality.
Innovation Solution
The UE determines whether to perform neighbor link measurements based on preconfigured criteria or signaling from the base station, evaluating conditions such as signal quality thresholds and mobility states to optimize measurement frequency and necessity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs neighbor link measurements frequently, then the UE can access the network via a base station with better signal quality, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the measurement frequency adaptive rather than fixed. The UE dynamically adjusts whether to perform neighbor link measurements based on real-time evaluation of refraining conditions, signal quality thresholds, and mobility state. This dynamic approach allows the system to optimize between power consumption and measurement accuracy by performing measurements only when necessary, such as when signal quality deteriorates or mobility indicates potential better links are available.
Solution Approach 2:
The patent changes the parameter of measurement frequency from constant to variable based on multiple conditions. By evaluating refraining conditions, signal quality thresholds, and mobility state parameters, the system adjusts the measurement behavior accordingly. This parameter change enables the UE to reduce measurements when conditions permit refraining while increasing measurements when signal quality degradation or mobility suggests potential benefits.
2Use of energy by moving object
If the UE refrains from performing neighbor link measurements to save power, then the power consumption decreases, but the UE may access a base station with poorer signal quality
Solution Approach 1:
The patent implements feedback mechanisms where the UE continuously monitors signal quality and compares it against thresholds. When signal quality deteriorates below the threshold or when refraining conditions are no longer met, the system triggers neighbor link measurements. This feedback loop ensures that the UE maintains adequate signal quality by performing measurements only when necessary, thus balancing power savings with reliability.
Solution Approach 2:
The patent applies preliminary action by evaluating refraining conditions and signal quality thresholds before initiating measurements. The UE assesses whether measurements are needed in advance based on current signal state and mobility conditions, performing measurements proactively when potential benefits are anticipated rather than reactively after degradation occurs.
3Use of energy by moving object
If the UE performs link measurements too infrequently, then the power consumption is reduced, but the UE may miss opportunities to access better links
Solution Approach 1:
The system dynamically adjusts measurement frequency based on mobility state and signal conditions. When the UE is stationary and refraining conditions are met, measurements are reduced to save power. When mobility detects potential movement to better links or signal quality deteriorates, the system increases measurement frequency to maintain network access efficiency. This dynamic adaptation resolves the contradiction between power savings and productivity.
4Productivity
If the UE performs link measurements too often, then the network access efficiency is improved, but the power consumption increases
Solution Approach 1:
The patent applies local quality by tailoring measurement behavior to specific local conditions such as signal quality thresholds, mobility state, and refraining conditions. Rather than uniform frequent measurements, the system performs measurements selectively in local contexts where they provide benefit (e.g., when signal deteriorates or mobility indicates better links) and refrains in local contexts where they waste power (e.g., when stationary and conditions permit). This localized approach optimizes the balance between productivity and energy consumption.
Data Source
AI summary
A user equipment (UE) in a wireless communication network determines a snapshot value of a serving link signal received quality while the UE is permitted to refrain from performing neighbor link measurements. Responsive to detecting, while the UE is permitted to refrain from performing neighbor link measurements, that signal received quality of a serving link has dropped by at least a threshold amount below the snapshot value, the UE performs a neighbor link measurement.