CSI Feedback Triggering for Radio Sensing Resource Reduction
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Solution Overview
Problem
Existing CSI measurement technologies in wireless communication are designed for beamforming or ranging, neglecting radio sensing applications, leading to excessive transmission resource occupation and interference in scenarios where most objects are static.
Innovation Solution
Implement a communication method where a second node determines CSI changes relative to a threshold or ranking order, only sending feedback when significant movement is detected, thereby reducing unnecessary transmissions and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing CSI measurement technologies are used for radio sensing, then radio sensing application requirements can be met, but excessive transmission resources are occupied
Solution Approach 1:
The patent extracts only the necessary feedback information (CSI changes exceeding threshold or ranking order) from the complete CSI measurement data. Instead of transmitting all CSI measurements, the system selectively transmits only when movement is detected, reducing transmission resource occupation while maintaining radio sensing functionality.
Solution Approach 2:
The patent implements partial feedback action by comparing CSI changes against a threshold or ranking order. When the change amount exceeds the threshold or falls within the top N rankings, feedback is triggered. This partial action approach reduces unnecessary transmissions compared to continuous feedback, optimizing transmission resource usage.
2Loss of information
If all receive ends send CSI obtained through measurement to transmit ends, then complete channel state information is available, but excessive transmission resources are occupied
Solution Approach 1:
The patent extracts only the essential CSI information that indicates movement (changes exceeding threshold or top N ranking changes) rather than transmitting complete CSI data. This extraction approach maintains sufficient information for radio sensing applications while significantly reducing transmission resource consumption.
Solution Approach 2:
The patent changes the parameter of CSI feedback from continuous complete data transmission to selective transmission based on change amount threshold or ranking order. This parameter change transforms the feedback mechanism into a more efficient system that adapts transmission based on actual channel variations.
3Reliability
If receive ends continuously feedback CSI to transmit ends, then real-time channel state is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic feedback action triggered by threshold comparison or ranking order evaluation rather than continuous transmission. The system periodically checks CSI changes and only transmits when movement is detected, reducing power consumption while maintaining real-time channel state awareness for radio sensing applications.
4Adaptability or versatility
If existing CSI measurement technologies are used, then beamforming or ranging functions are achieved, but radio sensing application requirements are not considered
Solution Approach 1:
The patent makes the CSI measurement system universal by implementing a threshold-based or ranking-order-based feedback mechanism that serves multiple functions: beamforming, ranging, and radio sensing applications. This multi-functional approach allows the same system to adapt to different application requirements without sacrificing reliability for any specific function.
Data Source
AI summary
A method includes: A first node sends a threshold and a first packet to a second node. Correspondingly, the second node receives the threshold and the first packet from the first node. Then, the second node determines first channel state information CSI based on the first packet. If a change amount of the first CSI relative to preset CSI exceeds the threshold, the second node sends a second packet to the first node. If the change amount of the first CSI relative to the preset CSI does not exceed the threshold, the second node does not need to send the second packet to the first node. The method is applied to a radio sensing process.