Virtualized Polarization Beam Management for 5G MIMO Interference
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in beam management due to incomplete information at the base station regarding UE RF and codebook information, leading to inefficient beamforming and interference between MIMO layers across different polarizations.
Innovation Solution
The implementation of hybrid analog and digital beamforming, dynamic codebook sizes, and virtualization across vertical and horizontal polarizations allows for advanced beam management, enabling the UE to dynamically adjust antenna element activation and deactivation, and configure MIMO operations based on current data needs and polarization strengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hybrid analog and digital beamforming is implemented, then beam management efficiency is enhanced, but device complexity increases
Solution Approach 1:
The beamforming functionality is segmented into two distinct domains: analog beamforming handles spatial direction control through phase shifters, while digital beamforming manages signal processing and codebook operations. This segmentation allows each domain to be optimized independently, improving overall beam management efficiency while distributing complexity across separate functional blocks rather than concentrating it in a single complex unit.
Solution Approach 2:
The patent introduces an intermediary virtualization layer between the physical antenna elements and the MIMO layers. This virtualization mechanism acts as a mediator that maps antenna elements to virtual ports, allowing flexible configuration of beamforming resources without requiring direct complex interconnections between all antenna elements and all MIMO layers, thus reducing overall system complexity.
2Object-generated harmful factors
If virtualization across vertical and horizontal polarizations is implemented, then interference between MIMO layers is reduced, but device complexity increases
Solution Approach 1:
The patent extends the beamforming virtualization from the traditional single-polarization domain to a multi-polarization domain by adding a polarization dimension. Virtual ports are now associated with specific polarization types (vertical or horizontal), creating a four-dimensional mapping space (antenna element × polarization × MIMO layer × codebook). This dimensional extension naturally separates MIMO layers across orthogonal polarizations, reducing interference while the virtualization abstraction keeps complexity manageable.
Solution Approach 2:
The patent creates virtual copies of antenna elements and beamforming resources across different polarization domains. Instead of directly managing physical antenna elements, the system creates virtual representations that can be independently configured and mapped to different MIMO layers. This copying approach allows the same physical hardware to serve multiple logical functions with reduced interference.
3Adaptability or versatility
If dynamic codebook sizes are implemented, then adaptability is improved, but loss of information increases
Solution Approach 1:
The codebook size is made dynamic rather than fixed, allowing the system to adapt the number of codebook entries based on current channel conditions, polarization strength, and data requirements. The UE can dynamically adjust the codebook configuration and signal this adaptation to the base station, maintaining optimal performance while minimizing information loss through adaptive rather than static resource allocation.
Data Source
AI summary
Various systems and methods disclosed herein describe improvements for beam management that leverage virtualization across a vertical polarization (V-Pol) and horizontal polarization (H-Pol). One or more of a user equipment (UE) and a base station may include an antenna array comprising both V-Pol and H-Pol antenna elements. A UE may message a base station to configure uplink (UL) multiple input multiple output (MIMO) operations across one or more of the V-Pol and the H-Pol. The message may include a number of MIMO layers to be concurrently used for communicating data to the base station, where each MIMO layer is transmitted using one of a V-Pol and an H-Pol; a number of sounding reference signals (SRS) to be transmitted by the UE, each SRS to be transmitted using one of the V-Pol and the H-Pol; and a supported maximum number of antenna ports per each SRS.