Beamforming Training via Sub-10 GHz Trigger for mmWave Reliability
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Solution Overview
Problem
There is a need for a technical solution to support beamforming training over millimeterWave (mmWave) wireless communication channels, which existing technologies have not adequately addressed.
Innovation Solution
The proposed solution involves a method for beamforming training over mmWave wireless communication channels, where a beamforming training trigger frame is transmitted over a sub-10 GHz wireless communication channel to configure beamforming training parameters, followed by a sequence of training frames transmitted over the mmWave channel, and finally, a feedback frame is received to adjust the beamforming settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming training is performed over mmWave channel, then communication reliability and data transfer rates are improved, but the complexity of the training process and channel conditions increase
Solution Approach 1:
The patent introduces a sub-10 GHz wireless communication channel as an intermediary to transmit the beamforming training trigger frame. This mediator channel simplifies the initialization process by providing a more stable and easier-to-establish communication path for control signaling, while the actual high-speed data transmission occurs over the mmWave channel. The intermediary channel handles the complex coordination tasks with fewer constraints.
2Ease of operation
If beamforming training trigger frame is transmitted over sub-10 GHz channel, then ease of operation and parameter configuration are improved, but the data transfer rate is limited compared to mmWave
Solution Approach 1:
The patent segments the communication task into two distinct phases: initialization and data transmission. The beamforming training trigger frame and configuration parameters are transmitted over the sub-10 GHz channel during initialization, where ease of operation and reliable parameter delivery are prioritized. Once the beamforming parameters are configured and the mmWave channel is established, the actual high-rate data transmission occurs over the mmWave channel. This segmentation allows each channel to operate in its optimal regime.
Solution Approach 2:
The system dynamically switches between different wireless channels based on the operational phase. During the initialization phase, the sub-10 GHz channel is activated for reliable parameter exchange. After successful beamforming training, the system transitions to using the mmWave channel for high-speed data communication. This dynamic channel selection allows the system to optimize for ease of operation during setup and for productivity during data transmission.
3Reliability
If sequence of training frames is transmitted over mmWave channel, then communication reliability is improved through beamforming, but the training time and channel occupancy increase
Solution Approach 1:
The patent applies preliminary action by transmitting the beamforming training trigger frame over the sub-10 GHz channel before initiating the sequence of training frames over the mmWave channel. This preliminary configuration establishes all necessary beamforming parameters, sector information, and timing details in advance. When the training sequence begins over the mmWave channel, the system already has the required configuration ready, which streamlines the actual training process and reduces the time needed for frame transmission and processing.
Data Source
AI summary
For example, an AP device may be configured to transmit a beamforming training trigger frame from a sub-10 GHz AP of the AP device over a sub-10 GHz wireless communication channel, the beamforming training trigger frame including configuration information to configure beamforming training over a mmWave wireless communication channel; to transmit a sequence of training frames from a mmWave AP of the AP device over the mm Wave wireless communication channel after the beamforming training trigger frame, the sequence of training frames includes one or more sector-based training sequences according to the configuration information, wherein a sector-based training sequence includes transmission of one or more training frames according to the configuration information; and to process a feedback frame from a non-AP device to identify feedback information based on the sequence of training frames.