Millimeter-Wave Beam Correlation for Inter-Band Carrier Aggregation
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Solution Overview
Problem
Wireless communications systems face challenges in managing beam correlation across different millimeter wave frequency bands, particularly in inter-band carrier aggregation, due to environmental degradation and varying beam quality in FR2 and FR4, which affects signal reliability and efficiency.
Innovation Solution
A method and apparatus for wireless communications that utilize a beam correlation parameter based on a carrier aggregation configuration to determine and use correlated beams across millimeter wave frequency bands, such as FR2 and FR4, for improved communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming is used across different millimeter wave frequency bands (FR2 and FR4), then communication coverage and capacity are improved, but beam correlation degradation occurs due to environmental factors affecting signal reliability
Solution Approach 1:
The system performs preliminary beam measurement and correlation assessment before establishing carrier aggregation. The gNB measures beam correlation between FR2 and FR4 bands using reference signals, and only configures carrier aggregation when correlation exceeds a threshold, preventing unreliable beam pairs from being used
Solution Approach 2:
The system implements feedback mechanisms where the gNB continuously monitors beam correlation metrics and adjusts carrier aggregation configuration accordingly. When beam correlation degrades below threshold, the system reconfigures or releases carrier aggregation to maintain communication reliability
2Productivity
If carrier aggregation configuration is implemented across multiple frequency bands, then network efficiency is improved, but signaling overhead increases
Solution Approach 1:
The system performs preliminary beam measurement and correlation assessment before establishing carrier aggregation. The gNB measures beam correlation between FR2 and FR4 bands using reference signals, and only configures carrier aggregation when correlation exceeds a threshold, preventing unreliable beam pairs from being used
Solution Approach 2:
The system dynamically adjusts carrier aggregation configuration parameters based on measured beam correlation. When correlation is high, carrier aggregation is enabled with specific bandwidth and frequency band parameters; when correlation drops, parameters are modified to maintain reliability while reducing signaling overhead
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first wireless device may receive, from a second wireless device, a carrier aggregation configuration including two millimeter wave frequency bands for communications. The first wireless device may determine a beam correlation parameter based on the carrier aggregation configuration. The first wireless device may determine beams, based on the beam correlation parameter, in the two frequency bands. The first wireless device and the second wireless device may communicate in carrier aggregation using a beam on a first frequency band and a second beam on a second frequency band.