Adaptive Beamforming Feedback Accuracy Control
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Solution Overview
Problem
The existing methods for feeding back channel information in wireless communication systems for beamforming are inefficient, leading to increased power consumption and reduced throughput in user equipment (UE) due to high overhead requirements for accurate feedback.
Innovation Solution
A method and base station that determine and adjust the accuracy level of channel information based on interference and other parameters, allowing the UE to transmit channel information with optimized accuracy levels, thereby reducing unnecessary overhead and improving beamforming precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE feeds back channel information with high accuracy to enable high-precision beamforming at the eNB, then the beamforming accuracy is improved, but the overhead increases leading to increased power consumption and reduced throughput of the UE
Solution Approach 1:
The patent changes the parameter of feedback accuracy from fixed high precision to variable precision levels. The eNB configures different accuracy levels (e.g., first accuracy level with more bits, second accuracy level with fewer bits) based on channel conditions, interference levels, and beamforming requirements. This allows the system to adaptively adjust feedback precision to match actual needs, reducing unnecessary overhead while maintaining sufficient beamforming accuracy.
2Measurement precision
If the UE feeds back channel information with high accuracy to enable high-precision beamforming at the eNB, then the beamforming accuracy is improved, but the power consumption of the UE increases
Solution Approach 1:
The patent implements dynamic parameter adjustment where the feedback accuracy level is changed based on current system conditions. When channel conditions are good or beamforming requirements are moderate, the system uses lower accuracy levels with fewer feedback bits, directly reducing UE power consumption. When conditions require higher precision, the system switches to higher accuracy levels, ensuring power is only consumed when necessary for maintaining beamforming performance.
3Measurement precision
If the UE feeds back channel information with high accuracy to enable high-precision beamforming at the eNB, then the beamforming accuracy is improved, but the overhead increases
Solution Approach 1:
The patent employs parameter adjustment by changing the precision level of channel state information feedback. The eNB configures the UE to report channel information at different accuracy levels (e.g., using different numbers of bits for PMI, CQI, and RI feedback). This reduces the quantity of feedback data transmitted when high precision is not required, thereby reducing uplink overhead and freeing up resources for actual data transmission.
Solution Approach 2:
The patent applies partial action by having the UE feed back only the necessary amount of channel information rather than complete high-precision data in all conditions. The system determines the minimum required accuracy level needed for acceptable beamforming performance and configures feedback accordingly, avoiding the excessive transmission of redundant high-precision data that would increase overhead without providing proportional performance benefits.
Data Source
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AI summary
A method of handling a beamforming feedback for a base station of the wireless communication system which comprises receiving a message comprising information of an interference caused by a communication between the base station and a communication device of the wireless communication system; determining an accuracy level of channel information according to the information of the interference; controlling the communication device to transmit the channel information with the accuracy level to the base station; and performing a beamforming according to the channel information to communicate with the communication device, after receiving the channel information transmitted by the communication device.