UE Mobility Measurement for Multi-Antenna Beamforming
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately measuring and reporting the mobility of user equipment (UE) for multi-antenna beamforming, which affects beam width adjustment and communication efficiency.
Innovation Solution
A method for UE to calculate and report movement velocity information to a base station, allowing the base station to adjust beam width based on received velocity data, using predefined signals to determine vertical and horizontal movement velocities and Doppler shift analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam width is reduced for precise beamforming, then spatial selectivity and signal quality improve, but the beam becomes more sensitive to UE mobility and Doppler shift
Solution Approach 1:
The patent implements dynamic beam width adjustment based on measured UE mobility. The base station adapts the beam width parameter in real-time according to the UE's velocity and direction of movement, making the beamforming system flexible and responsive to changing conditions rather than using a fixed beam width.
Solution Approach 2:
The patent changes the beam width parameter based on measured mobility parameters (velocity, direction). By adjusting this key parameter according to UE movement characteristics, the system optimizes the balance between spatial selectivity and robustness to mobility-induced Doppler effects.
2Reliability
If beam width is increased to accommodate UE mobility, then beam stability improves, but spatial selectivity and signal quality deteriorate
Solution Approach 1:
The system dynamically adjusts beam width based on real-time mobility measurements rather than using a static, conservative beam width. This allows the system to achieve narrow beams when UE is stationary or moving slowly, and wider beams when UE mobility is high, optimizing both precision and stability as needed.
Solution Approach 2:
The beam width parameter is changed adaptively based on mobility conditions. When UE velocity is low, the parameter is set for precise beamforming; when velocity increases, the parameter is adjusted to maintain beam stability, thus optimizing performance across different mobility scenarios.
3Device complexity
If conventional mobility measurement methods are used, then implementation is simple, but measurement accuracy for multi-antenna beamforming is insufficient
Solution Approach 1:
The patent replaces conventional mobility measurement methods with a new approach based on Doppler shift analysis of reference signals. Instead of using traditional methods, the system calculates mobility parameters (velocity, direction) by analyzing the Doppler effect on received reference signals from multiple antennas, achieving higher accuracy for beamforming applications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise measurement and reporting of UE mobility, allowing for adaptive beam width adjustment that improves communication efficiency and performance in multi-antenna beamforming systems.
Implementation Method 1
calculating at least one piece of movement velocity information of a vertical beamforming direction movement velocity vw and horizontal beamforming direction movement velocity vx of the UE based on the predefined information, and reporting the at least one piece of movement velocity information to the base station, wherein the predefined signal is used to calculate a velocity Vb of the UE in a direction of the base station
Data Source
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AI summary
Disclosed herein is a method for, at a user equipment (UE), reporting velocity information to a base station for multi-antenna based beamforming in a wireless communication system. The method includes receiving a predefined signal from the base station, calculating at least one piece of movement velocity information of a vertical beamforming direction movement velocity vw and horizontal beamforming direction movement velocity vx of the UE based on the predefined information, and reporting the at least one piece of movement velocity information to the base station. The predefined signal is used to calculate a velocity vb of the UE in a direction of the base station.