WLAN Sensing Frame Classification via EDMG-Header-A Bits
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Solution Overview
Problem
Existing wireless LAN systems face challenges in efficiently classifying sensing frames for channel measurement in the 60 MHz band, particularly in ensuring compatibility with existing standards like 802.11ad and 802.11ay, while maintaining privacy and enhancing sensing performance.
Innovation Solution
A method and apparatus for classifying sensing frames in a WLAN system by using a packet classification indicator within the EDMG-Header-A field, which distinguishes sensing frames from normal frames using reserved bits, allowing efficient decoding and channel measurement without additional signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a packet classification indicator is added to distinguish sensing frames from normal frames, then sensing performance and decoding efficiency are improved, but frame structure complexity increases
Solution Approach 1:
The patent applies local quality by modifying only specific bits within the existing EDMG-Header-A field structure. The packet classification indicator is embedded in reserved bits (bits 102-111) of the EDMG-Header-A field, allowing the system to add classification functionality without changing the overall frame structure. This localized modification improves decoding efficiency while minimizing structural complexity increase.
Solution Approach 2:
The patent makes the reserved bits in the EDMG-Header-A field serve multiple functions. These bits are originally reserved for future use, but the patent repurposes them to carry the packet classification indicator that distinguishes sensing frames from normal frames. This multi-functional use of existing reserved space avoids adding new fields and maintains frame structure simplicity.
2Adaptability or versatility
If sensing frames are processed with full decoding attempts, then compatibility with existing standards is maintained, but processing time and energy consumption increase
Solution Approach 1:
The patent applies preliminary action by performing packet classification before full decoding. The receiving station checks the packet classification indicator in the EDMG-Header-A field first to determine whether the frame is a sensing frame. This preliminary classification allows the receiver to skip unnecessary decoding steps for sensing frames, reducing processing time while maintaining compatibility through standardized field usage.
Solution Approach 2:
The sensing frames themselves carry the classification indicator that enables their own identification. The packet classification indicator in the EDMG-Header-A field allows receiving stations to automatically distinguish sensing frames from normal frames without requiring external classification mechanisms or complex processing, enabling efficient self-identification and selective processing.
3Measurement precision
If additional signaling is added to classify sensing frames, then sensing accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent recovers and repurposes the function of reserved bits that were originally discarded or left unused in the EDMG-Header-A field structure. By utilizing these previously unused reserved bits to carry the packet classification indicator, the system achieves sensing frame classification without adding new signaling elements. This approach maintains sensing accuracy while avoiding additional signaling overhead.
Data Source
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AI summary
Proposed are a method and device for performing sensing in a wireless LAN system. Specifically, a transmission STA generates a frame. The transmission STA transmits the frame to a reception STA in a 60GHz band. The frame includes an EDMGHeader- A field. A reserved bit of the EDMG-Header-A field includes a packet classification descriptor. The packet classification descriptor includes information indicating that the frame is a sensing frame used for sensing.