Real-Time Subcarrier Grouping for Beamforming Feedback
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in beamforming feedback due to high overhead, as they typically use fixed grouping size and codebook size values that do not adapt to varying channel conditions, leading to suboptimal performance and resource consumption.
Innovation Solution
The implementation of a beamformee device that performs real-time subcarrier grouping and codebook size selection based on channel variations, using processing circuitry to measure frequency variations and determine optimal grouping or codebook sizes, thereby reducing feedback overhead and enhancing beamforming efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed grouping size and codebook size values are used in beamforming feedback, then device complexity is reduced and ease of operation is improved, but feedback overhead increases and communication efficiency deteriorates
Solution Approach 1:
The patent implements dynamic subcarrier grouping where the grouping size is adjusted in real-time based on channel conditions. The beamformee device measures channel frequency selectivity and adaptively determines the grouping size, transitioning from fixed to dynamic configuration. This resolves the contradiction by making the grouping size flexible rather than static, reducing feedback overhead when channel conditions permit while maintaining operational simplicity through automated adaptation.
Solution Approach 2:
The patent changes the parameter of grouping size from a fixed value to a variable parameter that adapts to channel conditions. By measuring channel frequency selectivity and adjusting the grouping size accordingly, the system optimizes feedback overhead. This parameter change enables the system to use smaller grouping sizes when channel variations are low (reducing overhead) and larger grouping sizes when variations are high (maintaining performance), thus resolving the contradiction between ease of operation and feedback overhead.
2Productivity
If fixed grouping size and codebook size values are used in beamforming feedback, then device complexity is reduced, but communication efficiency and resource utilization deteriorate
Solution Approach 1:
The patent implements self-service mechanisms where the beamformee device autonomously measures channel conditions, determines optimal grouping sizes, and configures feedback parameters without external intervention. The device performs self-adaptation by measuring channel frequency selectivity and automatically adjusting grouping size based on predefined thresholds or algorithms. This self-service approach improves communication efficiency through adaptive optimization while managing device complexity by automating the decision-making process rather than requiring complex external control mechanisms.
Solution Approach 2:
The patent introduces feedback mechanisms where the beamformee device measures channel conditions and uses this information to adjust grouping size dynamically. The system continuously monitors channel frequency selectivity and provides feedback to the grouping configuration, enabling real-time optimization. This feedback loop improves communication efficiency by adapting to changing channel conditions while managing device complexity through structured feedback processing rather than requiring overly complex predictive models.
3Quantity of substance
If subcarrier grouping is performed with large grouping size, then feedback overhead is reduced, but beamforming accuracy and signal quality deteriorate
Solution Approach 1:
The patent implements dynamic adjustment of grouping size based on channel frequency selectivity measurements. When channel conditions are stable with low frequency selectivity, the system uses larger grouping sizes to reduce feedback overhead. When channel variations increase, the system automatically reduces grouping size to maintain beamforming accuracy. This dynamic adaptation resolves the contradiction by making grouping size conditional rather than fixed, optimizing the trade-off between overhead and accuracy based on real-time channel conditions.
Solution Approach 2:
The patent changes the grouping size parameter from a fixed value to a variable that adapts to channel frequency selectivity. By measuring channel conditions and adjusting the grouping size parameter accordingly, the system optimizes the balance between feedback overhead and beamforming accuracy. This parameter change enables the system to use larger grouping sizes (reducing overhead) when channel variations are low and smaller grouping sizes (maintaining accuracy) when variations are high, thus resolving the contradiction between feedback overhead and beamforming accuracy.
4Measurement precision
If subcarrier grouping is performed with small grouping size, then beamforming accuracy is maintained, but feedback overhead increases
Solution Approach 1:
The patent implements dynamic grouping size adjustment that transitions from fixed to adaptive configuration based on channel conditions. When channel frequency selectivity is high, the system uses smaller grouping sizes to maintain beamforming accuracy. When channel conditions are stable, the system increases grouping size to reduce feedback overhead. This dynamic behavior resolves the contradiction by making grouping size conditional, optimizing the trade-off between accuracy and overhead based on real-time channel measurements rather than using a consistently small fixed size.
Solution Approach 2:
The patent changes the grouping size parameter from a fixed small value to a variable parameter that adapts to channel frequency selectivity. By adjusting the grouping size parameter based on measured channel conditions, the system maintains beamforming accuracy when needed (using smaller sizes) while reducing feedback overhead when channel conditions permit (using larger sizes). This parameter adaptation resolves the contradiction by making grouping size flexible rather than consistently small, optimizing the balance between accuracy and overhead.
Data Source
AI summary
A beamformee device includes processing circuitry configured to obtain channel information associated with a plurality of subcarriers based on a null data packet (NDP) received through a channel from a beamformer device, measure a variation on a frequency of the channel based on the channel information, determine a grouping size value based on the variation, select one or more first subcarriers among the plurality of subcarriers based on the grouping size value, select first channel information among the channel information based on the one or more first subcarriers, generate a beamforming feedback report based on the first channel information, and transmit the beamforming feedback report to the beamformer device.