Virtual Reality Beamforming via Two-Phase Sector Sweep
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Solution Overview
Problem
Wireless VR video streaming faces challenges due to varying link quality, which requires periodic beamforming procedures that halt data transmission and increase 'dead' time, as existing methods test multiple sectors sequentially without optimizing the process.
Innovation Solution
Implementing an enhanced beamforming procedure with two phases: a wide phase to identify best wide sectors, followed by a narrow phase to test only adjacent sectors, reducing the number of sectors tested and thus shortening the beamforming time, using multi-RF antennas to determine the best antenna for subsequent data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic beamforming procedures are performed to adapt to changing link quality, then link quality is maintained, but data transmission is halted and dead time increases
Solution Approach 1:
The beamforming procedure is segmented into two distinct phases: a wide phase that tests multiple wide sectors to identify promising directions, and a narrow phase that tests only adjacent narrow sectors around the identified directions. This segmentation reduces the total number of sectors tested while maintaining link quality adaptation.
Solution Approach 2:
The wide phase serves as a preliminary action that identifies candidate sectors before the narrow phase performs detailed testing. By pre-identifying promising directions through wide sector testing, the system reduces the scope of subsequent narrow sector testing, thereby reducing overall beamforming time and dead time.
2Measurement precision
If multiple sectors are tested sequentially during beamforming, then optimal sectors are identified, but beamforming time increases
Solution Approach 1:
Sector testing is segmented into wide sectors for initial screening and narrow sectors for detailed evaluation. This two-level segmentation allows the system to quickly eliminate poor directions through wide sector testing while concentrating detailed testing only on promising directions, thereby reducing total testing time while maintaining identification accuracy.
Solution Approach 2:
Instead of testing all possible narrow sectors, the system performs partial testing by focusing only on narrow sectors adjacent to the best wide sector identified in the wide phase. This partial action approach maintains sufficient measurement precision for identifying optimal sectors while significantly reducing the total number of tests required.
Data Source
AI summary
Systems, apparatuses, and methods for implementing enhanced beamforming training procedures are disclosed. A system includes a transmitter communicating over a wireless link with a receiver. To maintain a high quality of transmission over the wireless link, the transmitter and receiver perform periodic beamforming training procedures to test the various sectors of the transmit and receive antennas. In a wide sector sweep procedure, the transmitter and receiver test wide sectors to find the best wide transmit and receive sectors for transferring data. Then in a narrow sector sweep procedure, narrow sectors within and/or adjacent to the best wide sectors are tested, to find the best narrow sectors. This reduces the amount of sectors that are tested during the enhanced beamforming training procedure by skipping those narrow sectors that are far away from the best wide sectors.