Wireless Sensing Phase Report Feedback for Vital Signs
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Solution Overview
Problem
Current WLAN standards, such as Wi-Fi, are inadequate for meeting stringent sensing requirements, particularly in vital signs detection, as they cannot provide information on small distance variations like breathing or heartbeat rates, despite supporting the 60 GHz band sensing.
Innovation Solution
A method for requesting and sending phase reports in wireless sensing systems, involving the generation of measurement request and report frames to facilitate phase feedback between sensing initiators and responders, utilizing existing Wi-Fi infrastructure to enhance sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If WLAN standards are used for sensing, then wireless communication capability is provided, but sensing precision for vital signs detection is insufficient
Solution Approach 1:
The patent extracts phase information from the range-Doppler map, which was previously unavailable in standard WLAN sensing. By separating and reporting phase information independently through measurement report frames, the system recovers the fine distance variation data needed for vital signs detection without being limited by conventional magnitude-only reporting.
Solution Approach 2:
The patent implements a feedback mechanism where the sensing responder sends measurement report frames containing phase information back to the sensing initiator. This feedback loop enables the initiator to receive and process phase data for accurate vital signs detection, transforming the one-way magnitude reporting into an interactive sensing protocol.
2Measurement precision
If magnitude of range-Doppler map is used, then speed and distance information is obtained, but small distance variations like breathing and heartbeat cannot be detected
Solution Approach 1:
The patent extracts phase information from the range-Doppler map, which was previously unavailable in standard WLAN sensing. By separating and reporting phase information independently through measurement report frames, the system recovers the fine distance variation data needed for vital signs detection without being limited by conventional magnitude-only reporting.
Solution Approach 2:
The patent adds a new dimension to sensing by incorporating phase information alongside magnitude data. While magnitude provides coarse distance and velocity information, phase provides fine distance variation information, creating a multi-dimensional sensing capability that enables both macroscopic motion detection and microscopic vital signs monitoring.
3Adaptability or versatility
If WLAN standards are used, then existing wireless infrastructure is utilized, but stringent sensing requirements for vital signs are not met
Solution Approach 1:
The patent makes the WLAN sensing system multi-functional by enabling it to perform both conventional sensing (speed and distance measurement) and advanced vital signs detection. Through the measurement request and report frame mechanism, the system can selectively report magnitude, phase, or both types of information, adapting to different sensing requirements using the same infrastructure.
Solution Approach 2:
The patent implements a feedback mechanism where the sensing responder sends measurement report frames containing phase information back to the sensing initiator. This feedback loop enables the initiator to receive and process phase data for accurate vital signs detection, transforming the one-way magnitude reporting into an interactive sensing protocol.
Data Source
AI summary
One wireless sensing method includes: generating a measurement request frame, wherein the measurement request frame is configured to carry indication information for phase report from a sensing responder, and sending the measurement request frame to the sensing responder. Another wireless sensing method includes: generating a measurement report frame, wherein the measurement report frame is configured to carry phase information, and sending the measurement report frame to a sensing initiator.