Orthogonal Beam Pair Sets for Real-Time Angular Coverage
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Solution Overview
Problem
Existing mechanisms for generating beams in massive MIMO systems require complex optimizations and are inflexible, making it difficult to adapt to different angular coverage regions in real-time.
Innovation Solution
A method and device for generating a beam set using orthogonal beam pairs with adjustable angular separations, allowing for flexible and efficient coverage of various angular regions without the need for offline optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a grid-of-beams (GoB) with many predetermined fixed beams is used to cover the angular coverage region, then complete coverage and high spectral efficiency are achieved, but the system complexity and number of beams required become very large (several hundreds)
Solution Approach 1:
The patent segments the traditional grid-of-beams approach into hierarchical levels: wide beams cover large angular regions at a coarse level, while narrow beams provide detailed coverage at a finer level. This segmentation allows the system to achieve complete coverage without requiring hundreds of individual beams, as the wide beams effectively divide the coverage space into manageable sectors.
Solution Approach 2:
The patent introduces a dimensional hierarchy by combining wide beams and narrow beams in a multi-level structure. Instead of using a single dimension of many narrow beams, the system adds a dimensional layer of wide beams that span larger angular regions, thereby achieving complete coverage with fewer total beams through this dimensional transformation.
2Manufacturing precision
If offline optimization is used to create beam configurations for specific angular coverage regions, then beam precision is improved, but the system loses flexibility and cannot adapt to different sector sizes in real-time
Solution Approach 1:
The patent implements dynamics by making the beam set configurable and adaptable through software control rather than fixed hardware configurations. The system can dynamically adjust which wide beams and narrow beams are activated based on the required angular coverage region, allowing real-time adaptation to different sector sizes while maintaining precise beamforming through the structured combination of beam pairs.
Solution Approach 2:
The patent enables parameter changes by allowing the system to modify beamforming weights, angular separations, and beam activation patterns based on the desired coverage region. This parameter flexibility allows the same hardware to be optimized for different sector sizes and angular regions without requiring physical reconfiguration, thereby achieving both precision and adaptability.
3Adaptability or versatility
If dual polarized beamforming (DPBF) is used to create wide beams, then flexibility in beam width is achieved, but the polarization patterns become complicated and optimization is required
Solution Approach 1:
The patent segments the polarization complexity by separating the wide beam formation (handled by DPBF with orthogonal polarizations) from the narrow beam formation (handled by traditional beamforming). This segmentation allows each component to be optimized independently, reducing the overall complexity while maintaining beam width flexibility through the dual-polarized wide beams.
Data Source
AI summary
There is provided mechanisms for generating a beam set. A method is performed by a radio transceiver device. The method comprises generating the beam set as combination of at least two beam pairs. Each beam pair is formed by two respective beams with orthogonal polarizations. The two beams have their pointing directions separated by a first angular separation delta1>0. Neighbouring beam pairs have their pointing directions separated by a second angular separation delta2>0. The first angular separation delta1 is a function of the second angular separation delta2.