Dynamic Measurement Bandwidth Configuration for Mobile UE Power Efficiency
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Solution Overview
Problem
Current mobile telecommunication networks assume a fixed measurement bandwidth of 1.25 MHz for User Equipment (UE) during intra-frequency measurements, regardless of neighboring cell bandwidths, which may not be optimal for power conservation and efficient signal quality assessments.
Innovation Solution
A method where the base station determines the smallest cell bandwidth among neighboring cells, including the serving cell, to set a maximum measurement bandwidth for the UE, and signals this bandwidth for efficient intra-frequency measurements, allowing for dynamic adjustment based on cell bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed measurement bandwidth of 1.25 MHz is used for all neighboring cells, then the measurement process is simplified and standardized, but the power consumption efficiency deteriorates when neighboring cells have different bandwidths
Solution Approach 1:
The patent implements dynamic measurement bandwidth configuration where the base station determines the measurement bandwidth for each neighboring cell based on its actual bandwidth characteristics. The UE receives and adapts to different measurement bandwidth configurations (e.g., 1.25 MHz, 5 MHz, 10 MHz, 20 MHz) according to the specific neighboring cell being measured, making the measurement process flexible and bandwidth-adaptive rather than fixed.
Solution Approach 2:
The patent changes the measurement bandwidth parameter dynamically based on the neighboring cell's bandwidth. The base station configures different measurement bandwidth values in measurement configuration messages depending on the target cell's bandwidth characteristics, allowing the measurement parameter to adapt to different operational scenarios and minimize UE power consumption.
2Ease of manufacture
If a fixed measurement bandwidth of 1.25 MHz is used for all neighboring cells, then the implementation is simpler and more standardized, but the signal quality measurement accuracy deteriorates for cells with larger bandwidths
Solution Approach 1:
The system dynamically adjusts the measurement bandwidth to match the neighboring cell's actual bandwidth. When measuring a 20 MHz cell, the UE is configured to measure over 20 MHz bandwidth rather than the default 1.25 MHz, capturing the full signal characteristics and improving measurement accuracy while maintaining implementation flexibility.
Solution Approach 2:
The measurement bandwidth parameter is changed according to the target cell's bandwidth characteristics. The base station provides specific measurement bandwidth configurations in measurement configuration messages, allowing the measurement parameter to be optimized for each neighboring cell type (1.25 MHz, 5 MHz, 10 MHz, or 20 MHz cells).
3Stability of the object's composition
If the UE measures over a fixed 1.25 MHz bandwidth regardless of cell bandwidth, then the measurement procedure is more consistent, but the adaptability to different cell configurations deteriorates
Solution Approach 1:
The measurement procedure becomes dynamic and adaptive while maintaining consistency through standardized configuration messaging. The base station determines appropriate measurement bandwidths based on neighboring cell characteristics and communicates these configurations to the UE using standardized RRC measurement configuration messages, ensuring both adaptability and procedural consistency.
Solution Approach 2:
The system implements feedback-based measurement configuration where the base station receives information about neighboring cell bandwidths and uses this feedback to determine appropriate measurement bandwidth configurations for the UE. This closed-loop approach ensures measurements are adapted to actual cell characteristics while maintaining consistent configuration procedures.
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AI summary
A mobile communications system is proposed in which mobile communications devices are arranged to carry out signal measurements on the signals received from neighbouring cells. The bandwidth over which these signal measurements are carried out is determined in dependence upon the bandwidths of the neighbouring cells and is signalled to the mobile communication device by a serving base station.