Lens-Based MIMO Beam Selection for FR2 Path Loss and Overhead
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Solution Overview
Problem
In high frequency bands, such as the FR2 band, path loss and increased overhead and calculation requirements pose challenges for efficient beam-based communication using a large number of antennas.
Innovation Solution
A method and apparatus for improving MIMO-based beam transmission and reception by determining transmission and reception candidate antenna groups and selecting optimal antenna element combinations using lenses to adjust signal frequencies and directions, enabling efficient wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large number of antennas are used to transmit and receive wireless signals with high antenna gain in high frequency bands, then path loss is reduced and communication quality is improved, but overhead and computational requirements increase
Solution Approach 1:
The patent divides the large antenna array into multiple sub-arrays or groups, where each group is controlled independently. This segmentation reduces the computational complexity of beamforming calculations while maintaining the overall antenna gain benefits, as each sub-array can be processed separately rather than requiring full-array computation.
Solution Approach 2:
The patent employs a reduced set of antenna elements or a subset of beamforming weights that are sufficient to achieve the required communication quality without utilizing the full potential of all available antennas. This partial action approach reduces overhead and computational requirements while maintaining adequate performance.
2Loss of energy
If a large number of antennas are used to improve communication quality in ultra-high frequency bands, then path loss is compensated, but the overhead for beam management increases
Solution Approach 1:
The patent combines multiple antenna elements into larger antenna groups or panels that function as unified transmitting or receiving units. This merging reduces the number of independent beam management operations required, as each combined group can be managed as a single entity rather than requiring separate management for each individual antenna element.
Solution Approach 2:
The patent designs antenna groups that can serve multiple functions simultaneously, such as both transmission and reception, or support multiple beamforming schemes. This multi-functionality reduces overhead by eliminating the need for separate beam management procedures for different functions.
3Power
If more antenna elements are selected to improve beam transmission performance, then transmission gain is increased, but the amount of calculation required increases
Solution Approach 1:
The patent pre-calculates and stores beamforming weights, antenna selection criteria, or channel state information for common transmission scenarios. This preliminary action allows the system to quickly select from pre-computed options rather than performing full calculations in real-time, maintaining high transmission gain while reducing online computational requirements.
Solution Approach 2:
The patent dynamically adjusts the number of active antenna elements or the complexity of beamforming calculations based on channel conditions, transmission requirements, and available computational resources. This parameter change approach allows the system to optimize the trade-off between transmission gain and calculation efficiency adaptively.
Data Source
AI summary
A method for operation of a first communication node in an embodiment of a communication system may include the steps of: from among a plurality of transmission antenna elements constituting a first transmission antenna of the first communication node, determining a transmission candidate antenna group including one or more transmission antenna elements via which a wireless signal may be transmitted in the direction of a second communication node through a first lens; receiving information regarding a reception candidate antenna group from the second communication node; determining one or more antenna element combinations on the basis of the one or more transmission antenna elements included in the transmission candidate antenna group and one or more reception antenna elements included in the reception candidate antenna group; and performing, on the basis of the one or more antenna element combinations, wireless communication with the second communication node.