Beam Correlation Selection for High-Mobility 5G Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of large-scale antenna arrays in mmWave band for 5G communication leads to increased signaling overhead and difficulty in adapting to high-mobility scenarios due to rapid beam changes, making existing beam management methods ineffective.
Innovation Solution
A terminal and base station system that utilizes a correlation between first and second beams, allowing the base station to determine a preferred beam based on measurement results from multiple first beams without requiring additional measurements from the terminal, using a pre-determined correlation or a neural network trained on historical data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam measurement and reporting is performed using existing methods with large-scale antenna arrays in mmWave band, then communication coverage is provided, but signaling overhead is significantly increased
Solution Approach 1:
The base station pre-calculates correlation values between first beams (SSB) and second beams (CSI-RS) and stores them in a correlation table before actual beam measurement. This preliminary action allows the terminal to directly query and use these correlation values without performing additional measurements, thereby reducing signaling overhead while maintaining communication coverage.
Solution Approach 2:
The patent uses correlation values that represent the relationship between first beams and second beams as a substitute for actual measurements. Instead of requiring the terminal to measure all second beams directly, the terminal copies the beam selection decision based on the correlation between measured first beams and the pre-stored correlation table, significantly reducing the number of measurements and signaling overhead.
2Measurement precision
If coarse-grained beam measurement using SSB signal is performed first, then fine-grained beam measurement using CSI-RS can be conducted, but the amount of signaling overhead increases for large-scale antenna arrays
Solution Approach 1:
The base station pre-calculates and stores correlation values between first beams (SSB) and second beams (CSI-RS) in a correlation table before the measurement process. This allows the terminal to perform coarse-grained measurement on SSB and then use the pre-computed correlation table to determine the corresponding fine-grained CSI-RS beams without additional signaling overhead for reporting all possible beam combinations.
Solution Approach 2:
Instead of requiring the terminal to measure and report all second beams (CSI-RS), the patent uses the correlation table to identify only the most relevant second beams based on the measured first beam. This partial measurement approach achieves sufficient measurement precision while significantly reducing the signaling overhead compared to exhaustive measurement of all beams.
3Productivity
If existing beam measurement methods are used, then beam selection can be performed, but it is difficult to keep up with environment changes in high-mobility scenarios
Solution Approach 1:
The base station pre-calculates and stores correlation values for multiple beam combinations in advance, creating a comprehensive correlation table that covers various environmental conditions. This preliminary preparation enables rapid beam selection and switching in high-mobility scenarios without requiring time-consuming recalculations when environmental changes occur.
Solution Approach 2:
The patent implements a dynamic beam selection mechanism where the terminal queries the pre-stored correlation table based on real-time measurements of first beams. This allows the system to rapidly adapt to environmental changes in high-mobility scenarios by quickly switching between pre-evaluated beam combinations, achieving both high productivity and adaptability.
Data Source
AI summary
The present disclosure provides a terminal and a base station. The terminal includes: a receiving unit configured to receive first information transmitted via a plurality of first beams; and a transmitting unit configured to transmit measurement results of the first information transmitted via at least a part of the first beams. The receiving unit is further configured to receive second information transmitted via a preferred beam of a plurality of second beams. The preferred beam is determined by a base station from the plurality of second beams according to measurement results of the first information transmitted via more than two first beams.