WLAN Sensing Grouping Frames for Collision-Aware Session Control
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Solution Overview
Problem
Existing WLAN sensing technologies face challenges in efficiently utilizing frequency resources and ensuring privacy protection, particularly in applications requiring high sensing performance and accuracy, such as motion detection and indoor positioning, without causing collisions and maintaining privacy.
Innovation Solution
A grouping scheme is introduced where a transmitting STA sends a grouping initiation frame with a session ID and sensing signal transmission information, and receiving STAs respond within a threshold, allowing for controlled sensing sessions and collision prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple STAs perform sensing simultaneously using existing WLAN sensing technologies, then sensing coverage and capability are improved, but frequency resource utilization becomes inefficient and collisions occur
Solution Approach 1:
The patent segments the sensing process by introducing a grouping mechanism where STAs are divided into different groups based on sensing parameters. Each group performs sensing operations at different times or with different configurations, thereby improving frequency resource utilization while maintaining comprehensive sensing coverage.
Solution Approach 2:
The patent implements dynamic group formation and management where STAs can be added or removed from groups based on sensing requirements. The grouping initiation frame and response frames enable dynamic adjustment of sensing configurations, allowing the system to adapt to changing sensing needs while optimizing resource usage.
2Adaptability or versatility
If multiple STAs perform sensing simultaneously, then sensing capability is enhanced, but collisions in the sensing process occur
Solution Approach 1:
The patent applies preliminary action by establishing sensing groups and assigning specific parameters before sensing operations begin. The grouping initiation frame pre-configures sensing parameters, time slots, and STA assignments, preventing collisions before they occur by ensuring coordinated sensing operations among multiple STAs.
Solution Approach 2:
The patent implements feedback mechanisms through grouping response frames where STAs confirm their group membership and sensing parameters. This feedback loop ensures that all STAs are properly configured and synchronized before performing sensing operations, thereby preventing collisions and ensuring reliable sensing capability.
3Ease of operation
If conventional sensing technologies are used, then basic sensing functions are achieved, but privacy protection is compromised
Solution Approach 1:
The patent applies local quality by enabling selective sensing where different groups of STAs perform sensing with different parameters and scopes. This allows the system to achieve comprehensive sensing functionality while limiting the sensing scope for individual STAs, thereby protecting privacy by ensuring that not all STAs can access all sensing data.
Data Source
AI summary
In a wireless local area network (wireless LAN) system, a transmitting STA can transmit, to a receiving STA, a grouping initiation frame for generating a group that is to perform sensing. The grouping initiation frame can include information related to a session identifier (ID) for a sensing session and to the number of transmission times of a sensing signal performed in the sensing session. The transmitting STA can receive a grouping response frame from the receiving STA. The receiving STA can be included in the group on the basis of the reception of the grouping response frame from the receiving STA within a threshold time preset from the transmission time of the grouping initiation frame. The sensing session can include at least one transmission opportunity (TXOP).