802.11bf Sensing Trigger Frame Design
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Solution Overview
Problem
There is a lack of existing solutions for designing sensing Trigger frames for the 802.11bf standard, which is essential for Wi-Fi sensing applications like motion detection and target device approach detection, as current designs are still under discussion and not established.
Innovation Solution
Proposed designs for sensing Trigger frames include defining a new Trigger variant using reserved values in the Trigger Type subfield and adding a Sensing Trigger Subtype subfield, or reusing the Ranging Trigger variant with a flag to differentiate between Ranging and Sensing operations, along with specific subvariants and User Info field modifications to support sensing measurement setups and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a new Trigger variant is defined for sensing operations, then sensing measurement flows can be effectively supported, but device complexity increases due to additional frame format definitions
Solution Approach 1:
The Trigger frame is segmented into distinct variants by utilizing the Trigger Type subfield. Different trigger types (e.g., ranging trigger, sensing trigger, uplink triggering) are clearly separated and defined, allowing each variant to have its own specialized format and functionality. This segmentation enables targeted optimization for sensing operations without affecting other trigger types.
Solution Approach 2:
The patent introduces a new dimension for frame differentiation by adding a Trigger Subtype subfield within the Trigger Type field. This creates a hierarchical structure where the first dimension (Trigger Type) categorizes the primary function, and the second dimension (Trigger Subtype) provides further specialization for different sensing operations, enabling fine-grained control without creating entirely new frame formats.
2Device complexity
If reserved values in Trigger Type subfield are used to define sensing trigger, then existing frame structures are maintained, but adaptability for specific sensing operations is reduced
Solution Approach 1:
The patent adds a second dimension of classification by introducing the Trigger Subtype subfield. This allows the system to maintain the existing Trigger Type structure while adding specialized sensing operations through the subtype field. The combination of Type and Subtype creates a matrix that supports both general trigger functions and specific sensing operations without increasing overall structural complexity.
Solution Approach 2:
The Trigger frame structure is designed to be universal by using a common base format that can accommodate multiple trigger types and subtypes. The same frame structure serves both ranging operations and sensing operations, as well as uplink triggering, by simply changing the values in the Type and Subtype fields. This multi-functionality reduces the need for multiple specialized frame formats.
3Device complexity
If Ranging Trigger variant is reused for sensing operations, then device complexity is reduced, but measurement precision for sensing applications is compromised
Solution Approach 1:
The patent applies local quality by allowing different Trigger Subtypes to have customized User Info field structures tailored to their specific requirements. While the overall frame format remains simple and reusable, the User Info fields can be locally optimized for sensing operations with appropriate subfields for sensing measurement setups, feedback, and configuration, ensuring measurement precision without increasing global complexity.
Solution Approach 2:
The User Info field is segmented into different subfield configurations depending on the Trigger Subtype. For sensing operations, specific subfields are included or excluded based on the sensing measurement requirements. This segmentation allows the frame structure to be simplified where possible while maintaining precision where needed, by only including necessary elements for each specific operation type.
Data Source
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AI summary
This disclosure describes systems, methods, and devices related to sensing trigger frame. A device may determine a sensing trigger frame comprising one or more fields. The device may include a sensing trigger subtype subfield in the trigger frame. The device may cause to send the sensing trigger frame to a first station device of one or more station devices.