WLAN Sensing Responder Allocation for Low-Power Area Coverage
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Solution Overview
Problem
Existing WLAN sensing technologies face challenges in efficiently utilizing power resources and channel environment information extraction, limiting the participation of IoT devices and the ability to perform sensing operations in expanded areas.
Innovation Solution
A method where an initiator station transmits sensing initiation frames to responder stations, receiving strength information and instructing suitable transmission based on device characteristics, offloading computation-intensive channel environment extraction to the initiator, allowing various devices to participate in sensing and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensing operations are performed by all responder STAs, then sensing coverage is improved, but power consumption increases
Solution Approach 1:
The sensing operation is segmented into two distinct roles: sensing initiator STA that performs computation-intensive channel environment information extraction, and sensing responder STAs that only transmit sensing signals. This segmentation allows responder STAs to conserve power while the initiator STA, which has sufficient computational resources, handles the complex processing tasks.
Solution Approach 2:
The initiator STA acts as an intermediary that receives sensing signals from multiple responder STAs, performs channel environment information extraction, and generates the final sensing results. This intermediary role centralizes the computational burden on the initiator while allowing multiple responders to participate in sensing operations.
2Measurement precision
If computation-intensive channel environment information extraction is performed by responder STAs, then sensing precision is improved, but device complexity increases
Solution Approach 1:
The computational tasks are segmented and assigned specifically to the initiator STA, which has the capability to handle channel environment information extraction. Responder STAs are relieved of this complex processing burden and only need to transmit sensing signals, thereby reducing their device complexity while maintaining sensing precision through the initiator's sophisticated processing.
3Area of stationary object
If sensing signals are transmitted across the entire bandwidth, then sensing area is expanded, but power consumption increases
Solution Approach 1:
Each responder STA is assigned to transmit sensing signals on a specific local portion or sub-band of the total bandwidth. This local quality approach allows the sensing area to be expanded across the entire bandwidth through coordinated transmissions from multiple responders, while each individual responder consumes less power by transmitting only on its allocated portion rather than the full bandwidth.
Data Source
AI summary
In a wireless local area network (wireless LAN) system, an initiator station (STA) can transmit a sensing initiation frame. The sensing initiation frame can include information related to a first responder STA operating as a sensing responder. The initiator STA can receive a first transmission initiation frame from the first responder STA. The first transmission initiation frame can include strength information about a first sensing signal. The initiator STA can receive the first sensing signal from the first responder STA. The sensing initiation frame can further include information related to a second responder STA operating as a sensing responder. The initiator STA can receive a second transmission initiation frame from the second responder STA. The second transmission initiation frame can include strength information about a second sensing signal. The second sensing signal can be received from the second responder STA.