Beam Failure Detection Using Joint Radio Link Quality
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Solution Overview
Problem
In new radio (NR) technology, particularly in frequency range 2 (FR2), beam-based transmission and reception are required due to rapid high-frequency channel attenuation, but existing methods struggle to accurately determine reference signal resources for beam failure detection and whether beam failure occurs, especially when multiple transmission and reception points (TRPs) are employed to send the same physical downlink control channel (PDCCH).
Innovation Solution
A method for beam failure detection is introduced, which involves determining a reference signal resource set and a subset based on joint radio link quality, allowing for effective detection of beam failures by comparing the combined radio link quality with a threshold (Qout), rather than independently measuring each reference signal resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple reference signal resources are independently measured for beam failure detection, then the detection process becomes simple and straightforward, but the detection accuracy deteriorates in multi-TRP scenarios where joint evaluation is needed
Solution Approach 1:
The reference signal resource set is segmented into multiple reference signal resource subsets, where each subset corresponds to a specific TRP. This segmentation allows the terminal to evaluate beam failure detection separately for each TRP while maintaining the ability to perform joint evaluation across all subsets, thus improving detection accuracy without overwhelming complexity
Solution Approach 2:
The patent introduces a new dimension of evaluation by calculating joint radio link quality across multiple reference signal resource subsets in addition to individual subset evaluation. This multi-dimensional approach (individual TRP evaluation + joint evaluation) enables more accurate beam failure detection in multi-TRP scenarios
2Reliability
If joint radio link quality of multiple beams is evaluated for beam failure detection, then the reliability of detection improves in multi-TRP scenarios, but the computational complexity increases
Solution Approach 1:
By segmenting the reference signal resource set into multiple subsets corresponding to different TRPs, the patent enables structured computation of joint radio link quality. The terminal can process each subset separately and then combine results, making the computational task more manageable while maintaining high reliability
Solution Approach 2:
The patent implements a two-level detection mechanism: partial action (individual subset evaluation) and excessive action (joint evaluation across all subsets). This allows the system to perform more comprehensive evaluation than simple individual checks, improving reliability while providing flexibility in computational effort
3Ease of operation
If individual reference signal resources are measured separately, then the detection method is straightforward and low-complexity, but it cannot accurately reflect the overall link quality in multi-TRP scenarios
Solution Approach 1:
The patent segments the evaluation process into individual subset measurement (maintaining simplicity) and joint evaluation (improving accuracy). Each reference signal resource subset can be measured separately using straightforward methods, then the results are combined to assess overall link quality accurately
Solution Approach 2:
The patent merges individual reference signal resource subsets into a unified evaluation framework. By combining the measurement results from multiple subsets through joint radio link quality calculation, the system achieves accurate overall link quality assessment while preserving the simplicity of individual measurements
Data Source
AI summary
A beam failure detection method. The beam failure detection method includes: determining a reference signal resource set for a beam failure detection, determining a reference signal resource subset based on the reference signal resource set, and performing the beam failure detection based on a joint radio link quality of the reference signal resource subset.