WLAN Sensing Transmit Parameter Indication via Management Frames
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Solution Overview
Problem
Existing WLAN sensing technologies face performance degradation due to transmit parameter adaptations in Wi-Fi devices, which can lead to incorrect interpretation of channel changes caused by environmental movements.
Innovation Solution
A method and apparatus for transmit parameter indication in support of WLAN sensing, where a new information element (IE) is defined to carry PHY parameters within existing or dedicated management frames, allowing sensing receivers to track and adapt to changes in transmit parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmit parameter adaptations are performed in WLAN devices, then device adaptability and communication performance are improved, but sensing accuracy deteriorates due to inability to differentiate channel changes caused by environmental movements from those caused by parameter adaptations
Solution Approach 1:
The patent implements a feedback mechanism where the transmitter sends transmit parameter indication information to the receiver through management frames (e.g., Beacon frames, Probe Response frames). The receiver uses this feedback information to differentiate between channel changes caused by environmental movements and those caused by transmitter parameter adaptations, thereby maintaining sensing accuracy while allowing transmit parameter adaptability.
Solution Approach 2:
The patent introduces an intermediary element - the transmit parameter indication information carried in management frames - that mediates between the transmitter's parameter adaptations and the receiver's sensing measurements. This intermediary provides the receiver with the necessary information to correctly interpret channel state changes, resolving the conflict between adaptability and measurement precision.
2Device complexity
If transmit parameter indications are carried in management frames, then implementation complexity is reduced by using existing frame structures, but information loss may occur if parameter changes are not properly indicated
Solution Approach 1:
The patent utilizes existing multi-functional management frames (Beacon frames, Probe Response frames, etc.) to carry transmit parameter indication information. These frames already serve multiple purposes in WLAN communication, and by adding parameter indication capabilities to them, the system avoids creating new specialized frames, thereby reducing implementation complexity while ensuring complete parameter information transmission through the established frame structures.
3Measurement precision
If new information elements are defined to carry PHY parameters, then measurement precision is improved by enabling accurate tracking of transmit parameter changes, but device complexity increases due to new frame structures
Solution Approach 1:
The patent implements a dynamic parameter indication mechanism where the transmit parameter indication information element is flexibly included in management frames based on whether parameter changes have occurred. The information element can be dynamically added or omitted depending on the transmission scenario, allowing accurate parameter tracking when needed while minimizing frame structure complexity in scenarios where parameter indications are not required.
Data Source
AI summary
Provided herein is a method and apparatus for transmit parameter indication in support of Wireless Local Area Network (WLAN) sensing. The disclosure provides an apparatus, comprising: a Radio Frequency (RF) interface; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: decode an Information Element (IE) received from a WLAN device via the RF interface, wherein the IE is to indicate a transmit parameter for a transmission of a Physical layer Protocol Data Unit (PPDU) of the WLAN device; and perform WLAN sensing on the WLAN device based on the IE. Other embodiments may also be disclosed and claimed.