Beam Usability Determination for Sidelink Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current communication systems face challenges in efficiently managing beams for sidelink communication in FR2 licensed spectrum, particularly in determining the most suitable beams for signal transmission.
Innovation Solution
The proposed solution involves a method where terminal devices determine the usability of multiple beams based on measured signal level and quality, perform beam-wise comparisons to identify the most suitable beam, and transmit indications to other devices using the physical sidelink feedback channel (PSFCH) to facilitate efficient beam reporting and selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam-wise comparison is performed among multiple beams to identify the most suitable beam, then beam selection accuracy is improved, but processing time and complexity increase
Solution Approach 1:
The system performs preliminary beam filtering by comparing beams against a threshold criterion before conducting detailed comparisons. Only beams meeting the threshold are subjected to full beam-wise comparison, reducing the number of beams requiring intensive processing while maintaining selection accuracy.
Solution Approach 2:
The beam selection process is divided into two stages: initial threshold-based filtering and subsequent detailed beam-wise comparison. This segmentation allows the system to quickly eliminate unsuitable beams before performing computationally intensive comparisons on a reduced set.
2Reliability
If multiple beams are evaluated and reported, then beam selection quality is improved, but feedback channel resource consumption increases
Solution Approach 1:
The system extracts and reports only the essential beam information (e.g., beam ID and quality metric) that is necessary for the receiving device to make an informed selection. Non-essential data is omitted, reducing feedback channel resource consumption while maintaining beam selection quality.
Solution Approach 2:
Instead of reporting complete detailed information about all evaluated beams, the system reports partial information about the top-ranked beams that exceeds the minimum requirement but is optimized to avoid excessive resource usage. This balances selection quality with resource efficiency.
Data Source
AI summary
Embodiments of the present disclosure relate to beam reporting. In an aspect, a first terminal device determines usability of at least one of a plurality of beams associated with at least one reference signal transmitted by a second terminal device based on measured signal level and/or quality; carries out beam-wise comparison among the at least one of the plurality of the beams determined usable, wherein the beam-wise comparison is based on the measured signal level and/or quality for identifying at least one beam having most suitable signal level and/or quality for signal transmission, and transmits, to the second terminal device, an indication indicating at least one of the following: the at least one beam having the most suitable signal level and/or quality; or the at least one of the plurality of beams being usable. The embodiments of the present disclosure can cause fast beam reporting.