Beam Selection Using Low Frequency Angular Power Spectrum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current beam selection methods in new radio (NR) networks require high signaling overheads and long scanning times due to the need for extensive phase-wise scanning of high frequency beams, which is inefficient and power-intensive, especially when using millimeter wave frequency bands.
Innovation Solution
A method where a terminal determines a high frequency beam scanning range based on the angular power spectrum of a low frequency channel, reducing the need for extensive phase-wise scanning by focusing on a specific range, thereby minimizing signaling interactions and scanning time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase-wise scanning is performed to obtain optimal high frequency beam, then beam selection accuracy is improved, but signaling overheads increase and scanning time increases
Solution Approach 1:
The patent performs preliminary beam selection using low frequency channel characteristics (angular power spectrum, peak direction) before high frequency beam scanning. This preliminary action identifies a limited scanning range based on low frequency measurements, reducing the number of high frequency beams that need to be scanned and selected from, thereby reducing signaling overheads while maintaining beam selection accuracy.
Solution Approach 2:
The patent uses low frequency channel characteristics as an intermediary to guide high frequency beam scanning. The angular power spectrum and peak direction obtained from low frequency channels serve as a mediator to determine the scanning range and prioritize beams for high frequency scanning, reducing the direct burden of exhaustive high frequency beam scanning and associated signaling.
2Measurement precision
If phase-wise scanning is performed to obtain optimal high frequency beam, then beam selection accuracy is improved, but scanning time increases
Solution Approach 1:
The patent performs preliminary beam selection using low frequency channel characteristics (angular power spectrum, peak direction) before high frequency beam scanning. This preliminary action identifies a limited scanning range based on low frequency measurements, reducing the number of high frequency beams that need to be scanned and selected from, thereby reducing scanning time while maintaining beam selection accuracy.
Solution Approach 2:
The patent segments the beam selection process into two stages: low frequency preliminary selection and high frequency detailed scanning. By dividing the exhaustive scanning task into segments, with the low frequency stage filtering out unlikely candidates, the overall scanning time is reduced while preserving the accuracy benefits of high frequency beam selection.
3Measurement precision
If extensive high frequency beam scanning is performed, then optimal beam quality is achieved, but power consumption increases
Solution Approach 1:
The patent performs preliminary beam selection using low frequency channel characteristics before high frequency beam scanning. This preliminary action identifies a limited scanning range based on low frequency measurements, reducing the number of high frequency beams that need to be scanned, thereby reducing power consumption while achieving optimal beam quality.
4Measurement precision
If three phase processing is performed for beam selection, then comprehensive beam optimization is achieved, but device complexity increases
Solution Approach 1:
The patent merges the low frequency channel measurement and high frequency beam scanning processes. By using low frequency angular power spectrum and peak direction to directly guide high frequency scanning range selection, the patent combines the advantages of both frequency bands into a unified streamlined process, reducing the complexity of managing separate three-phase processing while achieving comprehensive beam optimization.
Data Source
AI summary
A beam selection method includes determining, by a terminal, a first angular power spectrum of a low frequency channel transmitted between the terminal and an access network device, determining, by the terminal, a first high frequency beam scanning range based on the first angular power spectrum, and scanning, by the terminal, the first high frequency beam scanning range for a high frequency beam of the access network device.