Beam-Based UE Space Association for Low-Overhead MU-MIMO Scheduling
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Solution Overview
Problem
In 5G mobile communication systems, the use of Massive MIMO and spatial multiplexing technologies faces challenges due to poor orthogonality between antenna ports, leading to interference and traffic loss, especially when some user equipments lack SRS configuration, affecting the accuracy and computational burden of determining space association relationships.
Innovation Solution
A method is introduced to determine space association relationships by acquiring energy values of downlink scheduling services on preset beams, identifying a home beam based on a preset condition, and using preset beam space correlation data to establish relationships between user equipments, reducing reliance on SRS measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SRS measurement is used to calculate space correlation for all users, then space association relationship can be determined with high accuracy, but computational burden increases significantly and users without SRS configuration cannot be processed
Solution Approach 1:
The patent extracts the essential feature of space correlation calculation by using beam information and downlink scheduling service energy projections instead of requiring complete SRS measurements from all users. This allows the system to determine space association relationships for users without SRS configuration by leveraging the beam's spatial characteristics and the energy projection data already available for downlink scheduling.
Solution Approach 2:
The patent introduces beam information and downlink scheduling service energy projections as intermediary elements to bridge the gap between users without SRS configuration and the space association relationship determination. These intermediaries enable the base station to calculate space correlation indirectly through beam-based methods rather than requiring direct SRS measurements from all users.
2Productivity
If space division multiplexing is applied to users without SRS configuration, then system capacity can be maintained, but interference between data streams increases due to poor orthogonality
Solution Approach 1:
The patent changes the parameters used for space association relationship determination from traditional SRS-based methods to beam-based energy projection methods. By using the energy values of downlink scheduling services projected on preset beams and the beam's spatial characteristics, the system can establish adequate space correlation even for users without SRS configuration, thereby reducing interference while maintaining system capacity.
Data Source
AI summary
Provided are a method for determining a space association relationship between users, a base station, and a storage medium. The method includes the following: An energy value of an energy projection of a downlink scheduling service of each UE of multiple user equipments (UEs) on each preset beam of multiple preset beams is acquired; a preset beam corresponding to an energy value meeting a preset beam home condition among all energy values of an energy projection of the downlink scheduling service of each UE on all preset beams is used as a home beam of each UE; a space association relationship between the two UEs is determined according to home beams and preset beam space correlation data of two UEs in the multiple UEs. The preset beam space correlation data includes a space correlation relationship value between every two preset beams in the multiple preset beams.