Enhanced Beamforming Codebook Segmentation for Out-of-Coverage Beams
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Solution Overview
Problem
Existing beamforming codebooks in wireless communication systems, such as 5G and 6G, fail to effectively cover out-of-coverage regions beyond the boresight direction and its neighborhood, resulting in significant performance gaps.
Innovation Solution
Enhance the beamforming codebook by configuring additional sets of beam weights to cover out-of-coverage regions, including side and back lobe directions, and integrating these weights into the initial codebook to create an enhanced beamforming codebook.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beamforming codebook is designed to cover in-coverage region (boresight direction and neighborhood), then signal transmission quality in central area is improved, but coverage in out-of-coverage region (side and back lobe directions) deteriorates
Solution Approach 1:
The codebook is segmented into multiple subsets, each covering different spatial regions (in-coverage and out-of-coverage). The apparatus selects appropriate subsets based on the target direction, using first subsets for boresight neighborhood and second subsets for side/back lobe directions, thereby resolving the contradiction between centralized quality and overall coverage
Solution Approach 2:
The codebook configuration is made dynamic by enabling the apparatus to switch between different codebook subsets based on the target direction. This dynamic selection allows the system to optimize for in-coverage regions when needed while extending coverage to out-of-coverage regions when the target lies in side or back lobe directions
2Area of stationary object
If additional beam weight sets are added to cover out-of-coverage region, then coverage area is improved, but codebook complexity increases
Solution Approach 1:
The codebook is divided into multiple subsets with different coverage characteristics. By segmenting the codebook, the system manages complexity through organized structure while achieving comprehensive coverage, as each subset can be independently optimized and selected based on needs
Solution Approach 2:
Instead of designing a single codebook to cover all directions equally, the system uses partial action by selecting specific subsets appropriate for the current target direction. This avoids the excessive complexity of a universally optimized codebook while maintaining sufficient coverage for the actual service scenario
Data Source
AI summary
Aspects relate to mechanisms for generating an enhanced beamforming codebook to cover an out-of-coverage region of an antenna module of a wireless communication device (e.g., a UE). The UE may include an initial beamforming codebook configuring a plurality of beam weights intended to cover an in-coverage region corresponding to a boresight direction and a neighborhood thereof of the antenna module. The UE may further configure one or more additional sets of beam weights intended to cover the out-of-coverage region beyond the boresight direction and the neighborhood thereof and then add the one or more additional sets of beam weights to the initial beamforming codebook to produce the enhanced beamforming codebook.