Sidelink Beam Management Using UE Feedback and ANN Validation
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Solution Overview
Problem
Conventional sidelink communication methods in NR do not explicitly address beam management, which is crucial for power saving and inter-UE coordination, especially in scenarios without base station involvement.
Innovation Solution
A method for beam management in sidelink communication using Artificial Neural Network (ANN) to validate reported beams, involving UE feedback reports on beam ID, strength, and validity, with updates to a beam management table, and the use of S-SSB and SL-CSI-RS signals for beam transmission and measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional methods use S-SSB and SL-CSI-RS for power saving and inter-UE coordination, then power saving and coordination are improved, but beam management functionality is not explicitly provided
Solution Approach 1:
The patent makes S-SSB and SL-CSI-RS signals serve dual purposes: maintaining their existing functions for power saving and inter-UE coordination while simultaneously enabling explicit beam management. The beam management table and feedback report mechanism allow these reference signals to provide both coordination information and beam quality assessment, eliminating the need for separate beam management procedures.
2Measurement precision
If beam management table is continuously updated with feedback reports, then beam selection accuracy is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent implements selective updating of the beam management table based on feedback report quality and beam validity indicators. Instead of continuously updating all beam entries, the system updates only when necessary conditions are met (e.g., when beam validity is confirmed or when significant channel changes are detected), reducing processing overhead while maintaining accurate beam selection.
3Adaptability or versatility
If multiple SL-CSI-RS beams are multiplexed and transmitted in different directions, then beam coverage and selection options are improved, but resource consumption and interference increase
Solution Approach 1:
The patent divides the beam transmission space into multiple directional beams (S-SSB and SL-CSI-RS beams) that are transmitted in different spatial directions. Each beam serves a specific angular sector, allowing the system to provide comprehensive coverage while minimizing interference between beams through spatial separation. The beam management table tracks which beams are active in which directions, enabling coordinated transmission.
Data Source
AI summary
A method for beam management in side-link communication between User Equipment (UEs) (104) operating in a wireless communication network (100) is described. The method comprises transmitting a reference signal using at least one beam by a first UE (104-1). The first UE (104-1) receives a feedback report of the at least one beam based on the reference signal from the second UE (104-2, 104-4). The feedback report of the at least one beam comprises at least one of UE identifier (ID), beam ID, beam strength, and beam validity. The first UE (104-1) updates entries of a beam management table based on the feedback report.