Multi-Channel Beamforming Training in Wireless LAN Systems
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Solution Overview
Problem
In wireless LAN systems, particularly in the IEEE 802.11ay standard, there is a need for reliable data transmission methods that can handle multiple channels effectively, as high-frequency bands require directional data transmission to ensure reliable data transfer, but existing methods lack efficient beamforming techniques for multiple channels.
Innovation Solution
The method involves performing beamforming training on multiple channels by transmitting Sector Sweep frames, determining best sector information, and using channel bonding or aggregation methods to optimize data transmission, allowing for directional data transmission through the determined channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If directional data transmission is used in high-frequency bands, then data transmission reliability is improved, but beamforming training complexity increases
Solution Approach 1:
The patent segments beamforming training into two distinct phases: initial beamforming training for beam direction acquisition, and subsequent beamforming refinement for optimization. This segmentation allows the system to first establish basic directional transmission capability and then refine it, reducing overall complexity while maintaining reliability.
Solution Approach 2:
The patent performs preliminary beamforming training before actual data transmission to pre-determine optimal beam directions and sectors. By conducting this training in advance, the system establishes reliable beamforming parameters that can be reused during data transmission, avoiding the need for continuous complex training procedures.
2Productivity
If beamforming training is performed on multiple channels, then data transmission efficiency is improved, but training time increases
Solution Approach 1:
The patent merges beamforming training operations across multiple channels by performing initial training on a primary channel and reusing the obtained beamforming parameters for secondary channels. This combining approach allows efficient multi-channel operation without proportionally increasing training time for each channel.
Solution Approach 2:
The patent makes beamforming parameters obtained from training on one channel universally applicable to multiple channels. By determining beam directions and sector information that work across different channels, the system achieves multi-channel efficiency without requiring separate extensive training for each channel.
3Productivity
If channel bonding or aggregation methods are used, then throughput is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic channel selection and bonding strategies where the system adaptively determines which channels to bond or aggregate based on current channel conditions, beamforming results, and traffic requirements. This dynamic approach allows throughput optimization without requiring complex fixed configurations for all possible channel combinations.
Solution Approach 2:
The patent changes operational parameters such as channel bandwidth, channel aggregation level, and bonding configuration based on beamforming training results and channel quality measurements. By adjusting these parameters dynamically, the system achieves high throughput while avoiding the complexity of supporting all possible configurations simultaneously.
Data Source
AI summary
The present specification relates to a method for transmitting or receiving data by a station in a wireless LAN (WLAN) system and, more particularly, presents a method and device for transmitting or receiving data on the basis of a beamforming training method for a plurality of channels, when a station transmits the data by using the plurality of channels.