WLAN Sensing Rx SNR Subfield for CSI Estimation
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Solution Overview
Problem
In wireless communications, particularly in IEEE 802.11 standards, the coarse accuracy of received signal strength indicator (RSSI) is insufficient for indicating signal quality, especially when RSSI values are close, necessitating the inclusion of receive (Rx) signal-to-noise ratio (SNR) in sensing measurement reports to improve channel status information (CSI) estimation.
Innovation Solution
A method is introduced to include a subfield for Rx SNR in sensing measurement reports, allowing the sensing initiator to use SNR values for CSI estimates, alongside RSSI for signal strength and Rx_OP_Gain_Index for receiver operating conditions, enabling more reliable comparison and combination of CSI estimates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only RSSI is reported in sensing measurement reports, then the report structure remains simple, but the signal quality indication accuracy is insufficient
Solution Approach 1:
The measurement report is segmented into multiple distinct fields: RSSI for signal strength indication and a new SNR field for signal quality indication. This segmentation allows each field to serve its specific purpose independently, improving overall measurement precision while maintaining clear structure
Solution Approach 2:
The patent adds another dimension to the measurement report by introducing SNR as a complementary metric to RSSI. While RSSI provides one-dimensional signal strength information, the addition of SNR creates a two-dimensional measurement space that enables more accurate signal quality assessment
2Measurement precision
If RSSI with 1 dB step size is used, then the measurement report is compact, but the differentiation between close signal quality values is insufficient
Solution Approach 1:
The patent changes the measurement parameter from RSSI alone to a combination of RSSI and SNR. The SNR parameter provides finer granularity with smaller step sizes, enabling better differentiation between close signal quality values while maintaining efficient data representation
Data Source
AI summary
Techniques pertaining to wireless local area network (WLAN) sensing measurement report regarding receive (Rx) signal-to-noise ratio (SNR) in wireless communications are described. A sensing receiver is configured to perform a sensing measurement and generate a sensing measurement report. The sensing measurement report includes an Rx_SNR subfield indicating a Rx signal quality used in a channel state information (CSI) estimation.