NDPA Frame Format for WLAN Sensing With Lower Signaling Overhead
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Solution Overview
Problem
Existing WLAN sensing technologies face challenges in efficiently utilizing frequency resources and ensuring privacy protection while enhancing sensing performance, particularly in applications such as motion detection and gesture recognition, without incurring significant signaling overhead.
Innovation Solution
The introduction of NDPA frame formats that include common information for sensing, utilizing existing NDPA frames to reduce signaling overhead and enhance sensing performance in next-generation wireless LAN systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If new NDPA frames are designed for sensing, then sensing performance can be enhanced, but signaling overhead increases
Solution Approach 1:
The patent applies universality by enabling existing NDPA frame formats to serve dual purposes: traditional wireless LAN operations and sensing applications. By incorporating sensing capability indicators and measurement configuration information into existing frame structures, the patent allows a single frame type to perform multiple functions, thereby enhancing sensing accuracy without requiring entirely new frame designs and avoiding additional signaling overhead.
Solution Approach 2:
The patent utilizes parameter changes by modifying existing NDPA frame parameters to include sensing-related information. Specifically, it repurposes available fields within the NDPA frame structure to carry sensing capability indicators, measurement configuration data, and other sensing parameters. This approach allows the system to adapt existing frames for sensing purposes through parameter reconfiguration rather than creating new frame formats.
2Measurement precision
If sensing information is added to NDPA frames, then sensing capability is enhanced, but frame complexity increases
Solution Approach 1:
The patent applies segmentation by dividing sensing information into distinct, modular components that can be selectively included in NDPA frames. Rather than adding a monolithic sensing information block, the patent segments sensing data into separate fields such as sensing capability indicators, measurement configuration information, and measurement results. This modular approach allows receivers to process only the relevant segments based on their capabilities, reducing overall system complexity while maintaining enhanced sensing functionality.
3Reliability
If existing NDPA frames are reused for sensing, then signaling overhead is reduced, but sensing performance may be limited
Solution Approach 1:
The patent applies dynamics by making the NDPA frame structure adaptable and configurable for sensing applications. Rather than using fixed, static frame formats, the patent enables dynamic inclusion of sensing-specific fields and parameters based on operational requirements. The frame structure can be flexibly configured to include sensing capability indicators, measurement configurations, and other sensing data when needed, while reverting to traditional formats when sensing is not required, thus optimizing both overhead and performance.
Data Source
AI summary
The present specification proposes NDPA frame formats supported in a next generation wireless LAN system. According to one embodiment of the present specification, the NDPA frame formats may include common information for sensing. Here, the common information may be included in a special user information field. According to another embodiment of the present specification, the NDPA frame formats may use an existing NDPA frame format.