Adaptive Channel Sounding Frequency for VR Wireless Stability
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Solution Overview
Problem
Current beamforming sounding technologies in wireless local area networks (WLANs) are not adequately dynamic to handle rapid movements, particularly in applications like virtual reality (VR) and body area networks (BAN), where frequent channel sounding is necessary to maintain stable connections.
Innovation Solution
The proposed solution involves a mechanism where a device determines a frequency for channel sounding based on its movement characteristics and generates a frame to request another device in the WLAN to perform channel sounding using the determined frequency. This allows for more frequent channel sounding, adapting to the device's velocity and movement patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel sounding is performed frequently to handle rapid movements in VR and BAN applications, then connection stability is improved, but system overhead and processing complexity increase
Solution Approach 1:
The patent implements dynamic channel sounding frequency adjustment based on device movement characteristics. The system transitions from fixed periodic sounding to adaptive sounding where the frequency is dynamically modified according to detected movement patterns, thereby maintaining connection stability during rapid movement while reducing overhead during stationary periods
Solution Approach 2:
The system changes the parameter of channel sounding frequency based on movement characteristics. By detecting device velocity and movement patterns, the system adjusts the sounding interval parameter adaptively - using shorter intervals during rapid movement and longer intervals during stability, thus resolving the contradiction between reliability and complexity
2Measurement precision
If channel sounding frequency is increased for moving devices, then measurement accuracy is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts channel sounding frequency based on real-time movement detection. When devices are stationary or moving slowly, sounding frequency is reduced to conserve energy. When rapid movement is detected, frequency increases to maintain measurement accuracy, thus resolving the energy-accuracy tradeoff
Solution Approach 2:
The system applies partial channel sounding action based on movement needs rather than continuous full-frequency sounding. By performing sounding only at necessary intervals determined by movement characteristics, the system achieves adequate measurement precision while significantly reducing energy consumption compared to constant high-frequency sounding
3Adaptability or versatility
If fixed periodic channel sounding is used, then system simplicity is maintained, but adaptability to movement patterns deteriorates
Solution Approach 1:
The system implements feedback-based adaptive channel sounding where movement characteristics are continuously monitored and fed back to adjust sounding frequency. This closed-loop control enables the system to adapt to varying movement patterns while using standardized frame structures, achieving high adaptability without proportionally increasing complexity
Solution Approach 2:
The patent uses universal frame structures (NDP, Null Data Packet) that serve multiple functions - both for traditional periodic sounding and for movement-adaptive sounding. This multi-functionality allows the system to achieve adaptability through parameter modification rather than requiring entirely separate protocol mechanisms, thus limiting complexity growth
Data Source
AI summary
A first device includes one or more processors configured to determine a frequency of channel sounding based at least on a movement characteristic of the first device. The one or more processors can generate a first frame requesting a second device in a wireless local area network (WLAN) to perform channel sounding with the first device using the determined frequency of channel sounding. The one or more processors can wirelessly transmit, via a transceiver, the generated first frame to the second device.