Wireless AV Beamforming Sector Training Optimization
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Solution Overview
Problem
MIMO beamforming in wireless AV systems requires significant time for sector combination training, which can lead to latency and reliability issues, especially in environments where peer devices are fixed.
Innovation Solution
The method reduces the time required for MIMO beamforming by optimizing sector combinations and minimizing excessive training procedures, allowing for faster beam alignment and communication setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO beamforming is performed using sweep for all possible combinations per antenna and sector, then beamforming reliability is improved, but time required for beamforming increases
Solution Approach 1:
The patent segments the beamforming training process into two distinct phases: SISO beamforming training for single-antenna scenarios, and MIMO beamforming training for multi-antenna scenarios. This segmentation allows the system to select the appropriate training method based on the number of antennas, avoiding unnecessary comprehensive sector combination sweeps when only single-antenna beamforming is needed, thereby reducing time consumption while maintaining reliability when MIMO is actually deployed.
Solution Approach 2:
The patent implements partial action by performing only necessary beamforming training based on the actual antenna configuration. When peer devices are fixed and single-antenna operation is sufficient, the system performs only SISO training rather than exhaustive MIMO training across all antenna and sector combinations. This partial approach eliminates excessive training procedures while maintaining adequate beamforming performance for the given scenario.
2Measurement precision
If comprehensive sector combination training is performed, then beamforming accuracy is improved, but system complexity increases
Solution Approach 1:
The patent introduces dynamic adaptation in beamforming training by continuously monitoring channel conditions and peer device characteristics. The system dynamically adjusts the beamforming training approach - switching between SISO and MIMO modes, and adjusting the extent of sector combination training - based on real-time channel state information and device configuration. This dynamic approach maintains high beamforming accuracy by performing comprehensive training only when necessary, while reducing complexity in scenarios where fixed peer devices and stable channels allow for simpler training procedures.
Data Source
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AI summary
The present invention relates to an apparatus and a method for performing beamforming using multiple antennas in a wireless AV system. The present specification discloses a wireless data transmission apparatus comprising: a plurality of transmission antennas; a communication circuit for performing a MIMO beamforming procedure on the basis of an individual transmission sector sweep for each of the plurality of transmission antennas during a data transmission interval within a beacon interval, and transmitting a physical layer protocol data unit (PPDU) frame to a wireless data reception apparatus through the plurality of transmission antennas; and a processor connected to the communication circuit, and configured to generate AV data to be transmitted through the PPDU frame and provide the generated AV data to the communication circuit. The present invention can reduce time required for MIMO beamforming while minimizing training of an excessive sector combination in a communication procedure or information related to the MIMO beamforming in a wireless AV system, and maintain the reliability of the system by using an optimum sector combination.