Dynamic RFIC Switching for Beamforming Link Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In artificial reality systems, frequent head movements lead to channel degradation in wireless communication between head wearable displays (HWDs) and consoles, resulting in high power consumption and potential link loss due to the need for continuous beamforming and active radio-frequency integrated circuits (RFICs).
Innovation Solution
Implementing a dynamic switching mechanism between serving and idle RFICs based on channel conditions, using beam tracking and refinement protocols to optimize channel performance while reducing power consumption, by selectively performing beamforming and switching RFICs when the current channel condition falls below a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is performed continuously to maintain link performance during head movements, then channel optimization is improved, but power consumption increases
Solution Approach 1:
The system performs beamforming operations periodically at specific intervals rather than continuously. Beam tracking is performed at defined time points to update beamforming parameters, allowing the system to maintain link performance while reducing power consumption by idle RFICs between periodic updates.
Solution Approach 2:
The system dynamically switches RFICs between active and idle states based on channel conditions and movement detection. When channel conditions deteriorate below a threshold or movement is detected, RFICs are activated for beam tracking; otherwise, they remain idle to conserve power.
2Reliability
If multiple RFICs are kept active to handle channel degradation, then channel optimization is improved, but device complexity increases
Solution Approach 1:
The system segments RFIC management into distinct states (active and idle) with clear transition criteria. Each RFIC is independently controlled based on channel conditions, allowing selective activation without managing all RFICs simultaneously, thus reducing overall system complexity.
3Reliability
If beam tracking is performed frequently to maintain beam accuracy during head movements, then link performance is improved, but use of energy increases
Solution Approach 1:
The system uses feedback from channel condition monitoring and movement detection to trigger beam tracking only when necessary. When channel conditions fall below a threshold or movement is detected, beam tracking is initiated to update beamforming parameters; otherwise, tracking is skipped to conserve energy.
Data Source
AI summary
Systems and methods for beamforming include a device including at least one of a head wearable display (HWD) or a console. The device establishes a first connection between an active HWD radio-frequency integrated circuit (RFIC) and an active console RFIC. The device compares a modulation and coding scheme (MCS) of the first connection to an MCS threshold. The device performs MCS measurements for a second connection of at least one of an idle HWD RFIC or an idle console RFIC, while the first connection is maintained, in response to the MCS not satisfying the MCS threshold. The device compares the MCS measurements of the second connection to the MCS threshold. The device switches to the second connection when at least one of the one or more MCS measurements satisfies the MCS threshold and/or above the MCS of the first connection.