Radio Transceiver Beam Management via Angle Spread
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Solution Overview
Problem
Current beam management in communications networks faces challenges in achieving optimal performance and capacity due to mobility and changes in radio propagation environments, leading to suboptimal beam selection and increased overhead signaling.
Innovation Solution
A method for beam management that uses an angle spread value to determine the sparsity of directional beams in the candidate set, allowing for dynamic selection and reduction of signaling overhead, energy savings, and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam management is performed frequently to maintain optimal beam selection, then beam selection quality is improved, but signaling overhead increases
Solution Approach 1:
The patent applies dynamics by making the beam management procedure adaptive rather than static. The network node dynamically adjusts the frequency and granularity of beam management based on observed angle spread values. When angle spread indicates stable conditions, beam management is performed less frequently, reducing overhead. When angle spread indicates rapid changes, beam management is intensified to maintain quality. This dynamic adaptation resolves the contradiction between maintaining high beam selection quality and minimizing signaling overhead.
Solution Approach 2:
The patent changes the parameter of beam management intensity based on the angle spread parameter. By monitoring angle spread values and adjusting beam management frequency accordingly, the system optimizes the balance between beam selection quality and signaling overhead. This parameter-based control allows the system to respond to environmental changes without permanently committing to high overhead operations.
2Measurement precision
If a large number of candidate beams are tested in beam sweep, then beam selection accuracy is improved, but system overhead and complexity increase
Solution Approach 1:
The patent applies partial action by testing only a subset of candidate beams rather than exhaustively testing all possible beams. The network node selects a limited number of candidate beams based on angle spread information and previous beam measurements. This partial testing approach achieves sufficient beam selection accuracy without the complexity and overhead of testing all candidate beams, resolving the contradiction between accuracy and complexity.
Solution Approach 2:
The patent segments the beam search space into multiple groups or subsets based on angle spread characteristics. Instead of treating all candidate beams uniformly, the system divides them into segments that can be tested selectively. This segmentation allows the network to focus measurement resources on the most promising beam candidates, improving accuracy while reducing overall complexity.
3Area of stationary object
If wide beams are used for SSB transmission to cover large spatial footprint, then coverage is improved, but beamforming gain is reduced
Solution Approach 1:
The patent applies dynamics by switching between wide beams and narrow beams based on operational requirements and angle spread conditions. SSB transmission uses wide beams for initial coverage, while data transmission dynamically selects narrow beams when angle spread indicates suitable conditions. This dynamic switching allows the system to achieve both wide coverage when needed and high beamforming gain when possible, resolving the contradiction between coverage area and power concentration.
Solution Approach 2:
The patent applies local quality by using different beam widths for different purposes and different spatial regions. Wide beams are used for SSB in regions requiring broad coverage, while narrow beams are used for data transmission in regions where angle spread indicates focused communication is beneficial. This local differentiation allows the system to optimize both coverage and beamforming gain in appropriate contexts.
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
This approach enables more efficient beam management, reducing interference and enhancing system performance and capacity by optimizing beam selection based on changing angle spread values.
Implementation Method 1
multiple antenna elements are used to amplify the signal in a spatial direction by constructive interference, resulting in a directional gain and thereby a certain beam shape
Data Source
AI summary
There is provided mechanisms for beam management. A method is performed by a radio transceiver device. The method comprises obtaining an angle spread value for signal paths towards a second radio transceiver device. The method comprises performing a beam management procedure for selecting which directional beam to use for communication with the second radio transceiver device by transmitting or receiving reference signals in a candidate set of directional beams. Which directional beams to include in the candidate set of directional beams is dependent on the angle spread value by the angle spread value determining sparsity of the directional beams in the candidate set of directional beams.