Wireless LAN Sensing Session Dynamic Method Switching
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Solution Overview
Problem
Wireless LAN sensing technologies experience performance degradation due to limitations in frequency utilization efficiency and privacy concerns, particularly in presence detection scenarios where the distance between the sensing transmitter and receiver exceeds a certain value, leading to weak signal reception and unsatisfactory sensing performance.
Innovation Solution
A method that combines different sensing methods (Case 1 and Case 2) within a sensing session to enhance performance, allowing for real-time adjustment of the ratio between these methods based on validated reliability, thereby improving sensing accuracy and reducing continuous performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sensing method (Case 1 or Case 2) is used continuously, then the sensing process is simple, but sensing performance degrades continuously in certain channel environments
Solution Approach 1:
The patent implements dynamic sensing method selection by switching between Case 1 and Case 2 sensing methods based on real-time channel conditions and performance validation. The system transitions from static single-method sensing to dynamic multi-method sensing, adjusting the mixing ratio of different sensing methods according to validated reliability metrics to prevent continuous performance degradation.
Solution Approach 2:
The patent changes the sensing method parameter by varying the mixing ratio between Case 1 and Case 2 methods. By adjusting this parameter based on channel environment and performance validation, the system optimizes sensing performance without requiring complete redesign of the sensing architecture.
2Area of stationary object
If the distance between sensing transmitter and receiver increases, then the coverage area expands, but signal strength decreases leading to performance degradation
Solution Approach 1:
The patent combines Case 1 and Case 2 sensing methods into a composite sensing approach, where each method compensates for the other's weaknesses in different distance scenarios. This composite method enables reliable sensing across both near and far distances by leveraging the complementary strengths of different sensing techniques.
3Measurement precision
If sensing methods are adjusted dynamically to improve performance, then sensing accuracy increases, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms to validate sensing performance and adjust the mixing ratio of Case 1 and Case 2 methods accordingly. By using performance validation feedback, the system automatically optimizes sensing accuracy without requiring complex manual intervention, balancing improved precision with manageable system complexity.
Data Source
AI summary
In a wireless local area network (LAN) system, a sensing session may comprise a first burst and a second burst. A transmitting STA may transmit a sensing negotiation frame to a receiving STA. The transmitting STA may transmit a first sensing polling frame, associated with the sensing participation intention of the receiving STA, to the receiving STA in the first burst. The transmitting STA may receive a first response signal, associated with the first sensing polling frame, from the receiving STA in the first burst. The transmitting STA may transmit a first sensing frame to the receiving STA in the first burst. The transmitting STA may transmit a feedback request signal to the receiving STA in the first burst. The transmitting STA may receive a feedback signal from the receiving STA in the first burst.