WLAN Sensing Frame Retransmission Control Using Identification Bits
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Solution Overview
Problem
Existing WLAN sensing measurement processes face inefficiencies due to the need for message frames, particularly in the need to be sent repeatedly, especially in TB-based scenarios, where the same frame may need to be sent multiple times, leading to inefficiencies in bandwidth utilization and detection accuracy.
Innovation Solution
Incorporating a first identification bit in the radio frame to indicate whether it should be resent within a target transmission opportunity (TXOP) or sensing time window, allowing the initiator or responder to determine the need for retransmission based on this bit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same message frame is sent repeatedly in TB-based sensing mode, then detection reliability is improved, but bandwidth utilization deteriorates
Solution Approach 1:
The patent implements dynamic transmission control by introducing an identification bit that adapts the frame transmission behavior based on real-time sensing requirements. The system transitions from static repeated transmission to dynamic conditional transmission, where the identification bit dynamically indicates whether retransmission should occur, optimizing bandwidth usage while maintaining detection reliability when needed.
Solution Approach 2:
The patent changes the transmission parameter by adding an identification bit to the frame structure. This parameter change enables the system to differentiate between frames that require retransmission and those that do not, thereby adjusting the transmission behavior to improve bandwidth utilization while preserving detection reliability through selective retransmission.
2Measurement precision
If message frames are sent repeatedly to ensure detection accuracy, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The identification bit introduces dynamic control over frame retransmission timing. Instead of fixed repeated transmissions that consume time, the system dynamically determines whether retransmission is necessary based on the identification bit value, reducing unnecessary time delays while maintaining detection accuracy when retransmission is required.
Solution Approach 2:
The system uses the identification bit within the frame itself to self-determine whether retransmission should occur. This self-service mechanism eliminates the need for external control signals or prolonged waiting periods, allowing the system to efficiently manage retransmission decisions and reduce time loss while preserving measurement precision.
3Reliability
If the same frame is resent multiple times, then sensing measurement reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the frame transmission control function by adding a dedicated identification bit field. This segmentation separates the retransmission decision logic from the overall frame structure, making the control mechanism simpler and more manageable. The identification bit acts as an independent control element that clearly indicates retransmission requirements without complicating the overall system architecture.
Solution Approach 2:
The identification bit serves as a feedback mechanism that provides clear information about whether retransmission should occur. This feedback simplifies the control logic by providing explicit guidance on frame handling, reducing the complexity of transmission control while improving sensing measurement reliability through consistent retransmission behavior when needed.
Data Source
AI summary
A WLAN sensing measurement method, performed by a sensing initiator, includes: determining a first radio frame; and sending the first radio frame. The first radio frame comprises a first identification bit, which indicates whether the first radio frame is sent again within a target transmission opportunity (TXOP) or a target sensing time window,