Frequency-Selective Beam Management Across Wireless Subbands
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beams in higher frequency bands due to high channel propagation loss and hardware constraints, leading to impractical fully digital transceiver implementations and suboptimal beamforming techniques.
Innovation Solution
Implementing frequency-selective beam management (FSBM) using a joint phase time array (JPTA) system, which allows for simultaneous transmission and reception of beams over multiple frequency subbands, utilizing hybrid beamforming architectures with phase-shifters to reduce hardware cost and power consumption while enhancing beamforming gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large antenna arrays are used to compensate for high channel propagation loss in high-frequency bands, then link budget is improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands and applies different analog beams to different subbands. This frequency-selective beam management allows the system to use smaller antenna arrays per subband while maintaining overall link budget, as each subband can be optimized independently rather than requiring a single large array to handle the entire bandwidth effectively.
Solution Approach 2:
The patent implements local quality by applying different beamforming characteristics to different frequency subbands. Each subband can use optimized analog beams tailored to its specific propagation characteristics, allowing efficient use of smaller antenna arrays while maintaining reliable communication links across the entire frequency range.
2Power
If large antenna arrays with many mixed-signal components are deployed, then beamforming gain is improved, but power consumption increases
Solution Approach 1:
By segmenting the frequency spectrum into subbands and applying dedicated analog beams to each, the system achieves effective beamforming gain without requiring a single large array handling the entire bandwidth. This reduces the number of mixed-signal components needed, thereby lowering power consumption while maintaining the necessary beamforming performance for reliable high-frequency communication.
Solution Approach 2:
The patent changes the beamforming parameters (analog beams) according to frequency subbands. This allows the system to optimize beamforming gain for each subband independently using fewer antenna elements, reducing the overall number of mixed-signal components and their associated power consumption while maintaining effective beamforming across the complete frequency range.
3Adaptability or versatility
If frequency-selective beam management is implemented, then adaptability across frequency subbands is improved, but system complexity increases
Solution Approach 1:
The patent manages complexity by segmenting the frequency spectrum into subbands and assigning specific analog beams to each segment. This structured approach to frequency-selective beam management provides adaptability across different frequency characteristics while maintaining manageable system complexity through organized, subband-specific configuration rather than requiring complex full-bandwidth beam management.
Data Source
AI summary
Apparatuses and methods for frequency selective beam management (FSBM). A method for operating a user equipment (UE) includes receiving first information indicating one or more channel state information (CSI) reference signal (RS) resources for FSBM and receiving second information indicating a correspondence between the one or more CSI-RS resources and a plurality of frequency subbands. The method further includes determining, based on the first information, the one or more CSI-RS resources for FSBM and identifying, based on the second information, the correspondence between the one or more CSI-RS resources and the plurality of frequency subbands.