WLAN Sensing Trigger Frame Segmentation for Precision
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Solution Overview
Problem
Current wireless local area network (WLAN) systems lack an efficient method for performing sensing procedures and transmitting/receiving special STA/user information fields to indicate trigger frame variants used for sensing measurements.
Innovation Solution
A method and device for performing sensing measurements in a WLAN system by receiving a trigger frame with a sensing subfield, transmitting a specific PPDU based on the trigger frame, and using a special user info field to indicate the type of trigger frame and bandwidth extension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing WLAN sensing technologies are used, then sensing capability is provided, but measurement precision and reliability are insufficient for advanced sensing applications
Solution Approach 1:
The patent segments the trigger frame structure into multiple fields including a sensing subfield, user information field, and bandwidth extension field. This segmentation allows each component to carry specific sensing parameters and control information, enabling precise and reliable sensing measurements through structured data transmission.
Solution Approach 2:
The patent introduces preliminary action by transmitting a trigger frame before the actual sensing measurement. The trigger frame includes sensing subfields that prepare the receiving station for accurate measurement by providing advance information about the sensing parameters and expected bandwidth, ensuring reliable measurement execution.
2Adaptability or versatility
If trigger frame structure is extended to include sensing subfields and user information fields, then sensing capability and bandwidth configuration are improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the trigger frame structure to serve multiple functions: it carries sensing control information, user information, and bandwidth extension indicators all within a single frame structure. This multi-functionality enables the same frame format to support various sensing scenarios without requiring multiple specialized frame types.
Solution Approach 2:
The patent uses nesting by placing the sensing subfield within the trigger frame structure, and further nesting user information fields and bandwidth extension fields within the trigger frame. This nested arrangement allows compact organization of multiple information layers, reducing overall complexity while maintaining adaptability.
3Productivity
If bandwidth extension is supported through 320 MHz configurations, then transmission rate and sensing accuracy are improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the bandwidth configuration flexible through the bandwidth extension field in the trigger frame. The system can dynamically adjust the bandwidth between 80 MHz and 320 MHz based on sensing requirements and available resources, allowing efficient power usage by selecting appropriate bandwidth levels rather than always operating at maximum bandwidth.
Data Source
AI summary
A method and a device for performing sensing measurement in a wireless LAN system are disclosed. The method for performing sensing measurement in a wireless LAN system, according to one embodiment of the present disclosure, comprises the steps of: receiving a trigger frame from a second STA, the trigger frame including a sensing subfield indicating whether the type of trigger frame is a sensing trigger variant; and transmitting, to the second STA, a specific physical protocol data unit (PPDU) on the basis of the trigger frame, wherein the trigger frame includes a special user information field on the basis that the sensing subfield indicates that the type of trigger frame is the sensing trigger variant, and the special user information field can include an uplink (UL) bandwidth extension subfield indicating whether the bandwidth of the PPDU is 320 MHZ.