Channel Information Feedback Using CSI Variation Thresholds
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Solution Overview
Problem
Existing CSI measurement technologies in wireless communication occupy excessive transmission resources and reduce efficiency in wireless sensing applications due to the large amount of data required for feedback.
Innovation Solution
A method for selectively feeding back channel information based on predefined feedback conditions, using variation thresholds and sensitivity levels to reduce unnecessary data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI measurement technology is used for beamforming or ranging, then communication performance is improved, but transmission resources are excessively occupied and sensing efficiency is reduced
Solution Approach 1:
The patent extracts only the essential channel information needed for sensing applications from the complete CSI data set. By identifying and transmitting only the relevant components of channel state information that contribute to sensing accuracy, the system reduces feedback overhead while maintaining sensing performance.
Solution Approach 2:
Instead of transmitting complete CSI data, the patent implements partial feedback by selecting and transmitting only necessary channel information elements. This partial action approach reduces the amount of transmitted data while still providing sufficient information for wireless sensing applications.
2Measurement precision
If complete channel information is fed back to the transmitter, then measurement accuracy is improved, but message traffic increases and sensing efficiency decreases
Solution Approach 1:
The patent extracts and transmits only the essential components of channel information that are critical for sensing accuracy. By filtering out redundant data elements and transmitting only the meaningful variations in channel state, the system maintains measurement precision while reducing message traffic.
Solution Approach 2:
The implementation uses partial feedback by transmitting a subset of channel information that is sufficient for sensing applications. This approach avoids the excessive transmission of complete CSI data while maintaining adequate accuracy for detecting human body actions and environmental changes.
3Speed
If channel information feedback is performed frequently, then sensing responsiveness is improved, but transmission resource consumption increases
Solution Approach 1:
The patent implements periodic feedback transmission where channel information is fed back at specific intervals rather than continuously. This periodic action allows the system to maintain sensing responsiveness by regularly updating channel state while significantly reducing transmission resource consumption compared to continuous feedback.
Solution Approach 2:
The system employs self-service mechanisms where the receiver autonomously determines when feedback is necessary based on channel variation thresholds and sensing requirements. This intelligent feedback triggering reduces unnecessary transmissions while maintaining adequate sensing responsiveness.
Data Source
AI summary
A channel information feedback method. The method can be applied to a first wireless device, and includes: receiving a first message from a second wireless device, where the first message notifies channel information measurement, the first message carries first indication information related to the first wireless device, and the first indication information indicates a feedback condition; performing channel information measurement based on the first message; determining a first channel information variation based on currently measured channel information and historically measured channel information; and feeding back a measurement report to the second wireless device when the first channel information variation meets the feedback condition.