WLAN Sensing Parameter Negotiation for Low-Overhead Feedback
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Solution Overview
Problem
The existing wireless LAN systems face challenges in efficiently utilizing unlicensed spectrum and ensuring privacy-protected sensing capabilities, particularly in applications like motion detection and indoor positioning, without infringing on user privacy.
Innovation Solution
A method and apparatus for performing sensing in a wireless LAN system, involving role and parameter negotiation between STAs, using explicit and implicit methods to determine STAs for sensing and set transmission and measurement parameters, minimizing overhead and enhancing sensing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless LAN sensing procedures use fixed parameter sets, then device complexity is reduced, but adaptability to different sensing scenarios deteriorates
Solution Approach 1:
The patent implements dynamic parameter selection through negotiation between sensing initiator and responder. The sensing responder receives a sensing request containing multiple candidate parameter sets, selects the most appropriate set based on current sensing conditions and device capabilities, and communicates the selection back to the initiator. This dynamic adaptation allows the system to optimize sensing performance for different scenarios (e.g., motion detection, respiratory monitoring, positioning) while maintaining manageable device complexity through automated negotiation protocols.
2Reliability
If comprehensive parameter negotiation is performed, then sensing performance is improved, but communication overhead increases
Solution Approach 1:
The patent segments the parameter negotiation process into distinct phases: the sensing initiator transmits a sensing request frame containing multiple candidate parameter sets divided into transmission parameters and measurement/feedback parameters; the sensing responder evaluates these segmented parameter sets and selects the optimal combination; finally, the responder communicates back only the selected parameter indices rather than full parameter descriptions. This segmentation reduces communication overhead while maintaining comprehensive negotiation capabilities for high-quality sensing performance.
Solution Approach 2:
The patent extracts only the essential negotiation information needed for sensing performance optimization. Instead of transmitting complete parameter configurations back and forth, the system extracts and transmits only the indices or identifiers of selected parameter sets. The actual parameter values are referenced from pre-defined sets, reducing the amount of data that needs to be communicated while preserving the ability to negotiate comprehensive sensing parameters for reliable performance.
3Adaptability or versatility
If multiple parameter sets are negotiated, then sensing versatility is improved, but negotiation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining multiple parameter sets with different characteristics before the sensing negotiation occurs. Each parameter set is pre-configured with specific transmission parameters (e.g., signal waveform, bandwidth, power) and measurement/feedback parameters (e.g., channel state information, received signal strength, time of arrival). During negotiation, the sensing initiator and responder only need to exchange indices or identifiers referring to these pre-defined sets, rather than negotiating each individual parameter. This preliminary preparation significantly reduces negotiation complexity while maintaining the ability to support multiple sensing scenarios including motion detection, respiratory monitoring, and positioning.
Data Source
AI summary
Proposed are a method and apparatus for performing sensing in a wireless LAN system. Specifically, a first STA transmits a sensing request frame to a second STA. The first STA receives a first sensing response frame form the second STA. The first STA transmits a sensing signal to the second STA or receives the sensing signal from the second STA. The sensing request frame includes a transmission parameter set, a measurement and feedback parameter set, and a transmission method of the sensing signal. The sensing response frame includes a first indicator indicating whether to use at least one transmission parameter included in the transmission parameter set and a second indicator indicating whether to use at least one measurement and feedback parameter included in the measurement and feedback parameter set.