CIR Tap Feedback Patterning for Low-Overhead UWB Sensing
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Solution Overview
Problem
Current UWB systems face high configuration overheads and resource waste due to the sensing receiver feeding back CIR taps based on predefined feedback patterns.
Innovation Solution
A communication method and apparatus that reduces configuration overheads by using a CIR feedback scheme where the sensing transmitter sends parameters indicating the CIR taps to be fed back, allowing the receiver to determine the taps based on predefined patterns or bitmaps, thereby optimizing the feedback process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sensing receiver feeds back CIR taps based on a predefined feedback pattern, then the feedback process is simplified, but configuration overheads become excessively high and resources are wasted
Solution Approach 1:
The patent extracts only the necessary information (quantity of CIR taps to feedback) from the full configuration data, transmitting only this essential parameter through the second parameter while the sensing receiver derives the complete feedback pattern from predefined templates. This eliminates redundant configuration overheads while maintaining feedback simplicity.
Solution Approach 2:
The predefined feedback patterns serve multiple functions: they provide the feedback structure, determine tap selection criteria, and enable resource optimization. By making the feedback pattern universal and applicable to different scenarios, the system avoids needing separate configurations for each case, thereby reducing overheads while maintaining operational simplicity.
2Measurement precision
If detailed configuration parameters are transmitted to indicate each CIR tap, then feedback precision is improved, but configuration overheads and device complexity increase
Solution Approach 1:
The patent performs preliminary action by establishing predefined feedback patterns before the actual feedback process. These patterns are prepared in advance and stored at both the sensing transmitter and receiver, eliminating the need to transmit detailed configuration parameters during operation. This pre-preparation maintains feedback precision while significantly reducing real-time configuration overheads and device complexity.
Solution Approach 2:
Instead of transmitting unique detailed configurations for each feedback scenario, the system uses copies of predefined feedback patterns. The second parameter simply indicates which pre-existing pattern to use, rather than transmitting the entire pattern configuration. This copying approach maintains precision by using established patterns while dramatically reducing the complexity of parameter transmission and processing.
Data Source
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AI summary
A communication method and apparatus are applied to a wireless local area network system that supports IEEE 802.11ax (Wi-Fi 6)/802.1 1be (Wi-Fi 7)/802.11bn (Wi-Fi 68)/Wi-Fi AI/millimeter wave/ultra-wideband UWB, or sensing, to reduce overheads of a sensing receiver feeding back a CIR tap based on a predefined feedback pattern. A sensing transmitter may send first information including a first parameter and a second parameter. The first parameter is of a first value, the first parameter indicates that the sensing receiver feeds back a CIR tap based on the predefined feedback pattern, and the second parameter indicates a quantity of CIR taps that need to be fed back in each CIR group, or the second parameter indicates a length of a first bitmap, where the length of the first bitmap and a quantity of taps of a gap between two CIR groups of the predefined feedback pattern are used to determine a quantity of CIR taps that need to be fed back in each CIR group.