Beamforming Training in Beacon Data for Wi-Fi Discovery
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Solution Overview
Problem
Beamforming training in wireless communications, especially in dense networks using 802.11ad and 802.11ay protocols, is inefficient due to repeated Association Beamforming Training (A-BFT) intervals and potential collisions, leading to shortened Data Transmission Intervals (DTI) and ineffective communication.
Innovation Solution
The method involves transmitting beacon data with receive beamforming training fields and sector sweep frames during the DTI, allowing for dynamic allocation of additional A-BFT intervals and sector refinement, enabling effective beamforming even in cases of initial failure, thus improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple A-BFT intervals are added to improve access in dense networks, then beamforming training reliability is improved, but Data Transmission Interval (DTI) duration is reduced
Solution Approach 1:
The patent implements dynamic allocation of A-BFT intervals based on network conditions and device needs. The system can flexibly adjust the number and timing of A-BFT intervals within the beacon interval, allowing optimal balance between training reliability and data transmission time. This dynamic approach enables the system to adapt to varying network densities and traffic requirements without fixed constraints.
Solution Approach 2:
The patent utilizes periodic beacon intervals that contain both A-BFT and DTI phases. By structuring communication in periodic cycles with embedded beamforming training opportunities, the system ensures regular training occasions while maintaining predictable data transmission windows. This periodic structure allows multiple A-BFT attempts across different beacon intervals without permanently reducing DTI duration.
2Measurement precision
If beamforming training is performed in a dedicated A-BFT interval, then training precision is improved, but communication efficiency deteriorates due to separate training and data transmission phases
Solution Approach 1:
The patent merges beamforming training operations with data transmission operations by allowing SSW frames to be transmitted during both A-BFT and DTI phases. This integration enables the system to perform precise directional training while simultaneously preparing for or conducting data transmissions in the same time window, eliminating the strict separation between training and productivity phases.
Solution Approach 2:
The patent ensures continuous useful action by allowing beamforming training to overlap with or immediately precede data transmission without idle transitions. The SSW frame exchanges during A-BFT directly feed into DTI operations, maintaining continuous directional alignment and eliminating gaps between training completion and data transmission start, thus improving overall communication efficiency.
3Device complexity
If sector sweep frames are transmitted only during A-BFT, then training structure is simplified, but flexibility in handling training failures is reduced
Solution Approach 1:
The patent implements dynamic SSW frame transmission opportunities that can occur during both A-BFT and DTI phases. When initial training fails, the system can flexibly schedule additional SSW exchanges during the DTI without requiring complex restructured training protocols. This dynamic approach maintains relatively simple training structure while significantly improving adaptability to training failures and network conditions.
Data Source
AI summary
A method and apparatus for beamforming training in basic service set discovery is provided. Beacon data is transmitted from a first wireless communication device, the beacon data comprising: beacon data parameters for operation of a basic service set: and beamforming data that includes receive beamforming training fields. Beamforming occurs with a second wireless communication device that receives beacon data.