Beam Reporting With FRU Granularity for Frequency-Selective Beamforming
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Solution Overview
Problem
Existing wireless communication systems face challenges with communication errors due to variations in beam steering angles across different frequency bands, leading to reduced signal strength and inefficient use of network resources.
Innovation Solution
Implementing a multi-part beam report that indicates the quantity of beams and frequency resource units (FRUs) within a frequency bandwidth, allowing for optimized beam selection and reduced overhead communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If beamforming is used to direct communications along a beam path, then signal strength is improved, but communication errors occur due to variation of steering angles at different frequencies
Solution Approach 1:
The frequency bandwidth is divided into multiple frequency resource units (FRUs), and beam reports are generated separately for each FRU. This segmentation allows the system to account for frequency-dependent steering angle variations by providing tailored beam recommendations for each frequency segment, thereby maintaining signal strength while reducing communication errors across the broad bandwidth.
2Reliability
If the frequency bandwidth is limited to reduce variation at ends of the bandwidth, then communication errors are reduced, but spectral efficiency is reduced
Solution Approach 1:
The frequency bandwidth is segmented into multiple frequency resource units (FRUs), allowing the system to maintain a broad overall bandwidth for high spectral efficiency while treating each segment individually to minimize steering angle variations. This enables the system to achieve both high spectral efficiency and reduced communication errors simultaneously.
Solution Approach 2:
Different beam reports are generated for different frequency resource units, with each report tailored to the specific characteristics of that frequency segment. This local optimization ensures that each FRU uses the most appropriate beamforming parameters for its frequency range, reducing communication errors without limiting the overall bandwidth.
3Productivity
If a multi-part beam report with FRU granularity is implemented, then beam selection efficiency is improved, but message size increases
Solution Approach 1:
The beam report is segmented into multiple parts, with each part corresponding to a specific frequency resource unit. This segmentation improves beam selection efficiency by providing frequency-specific beam recommendations, while the modular structure allows for efficient encoding and transmission of the report.
Solution Approach 2:
The system transmits beam reports at different granularities depending on the situation. When frequency-dependent beam variations are significant, detailed per-FRU reports are transmitted. When variations are minimal, more compact reports are used, reducing the message size while maintaining adequate beam selection efficiency.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a plurality of reference signals (RSS) over a frequency bandwidth, each RS of the plurality of RSs being associated with a respective candidate beam of a plurality of candidate beams. The UE may transmit a multi-part beam report, the multi-part beam report including: a first part that indicates one or more of a quantity of beams indicated in the multi-part report, or a quantity of frequency resource units (FRUs) indicated in the multi-part beam report, and a second part that indicates, based on the measurements of the plurality of RSs, an association of a first beam with a first FRU of the FRUs, and an association of a second beam with a second FRU of the FRUs. Numerous other aspects are provided.