Device, system, and method for wireless local area network (WLAN) sensing

Patent metadata

Field	Value
Publication number	US-12520175-B2
Application number	US-202217894998-A
Country	US
Kind code	B2
Filing date	Aug 24, 2022
Priority date	Aug 25, 2021
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

Embodiments of a device, a method, and a system for wireless local area network (WLAN) sensing are disclosed. In an embodiment, the device for WLAN sensing includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to receive a sounding Physical Layer (PHY) Protocol Data Unit (PPDU) that includes preamble training fields, and detect environmental changes using managed sensing measurements obtained from the preamble training fields included in the sounding PPDU.

First claim

What is claimed is:

1 . A device comprising:
a wireless network interface device implemented on one or more integrated circuits (ICs), wherein the wireless network interface device is configured to:
receive or transmit a sounding Physical Layer (PHY) Protocol Data Unit (PPDU) that includes preamble training fields; and
detect environmental changes using managed sensing measurements obtained from the preamble training fields included in the sounding PPDU;
wherein the device transmits at least one frame in a sensing measurement exchange indicating to keep a transmit power constant; wherein the device transmits at least one of a Null Data Packet Announcement (NDPA) frame and a Sensing Measurement Report (SMR) frame in a non-Trigger Based (non-TB) sensing measurement exchange; wherein at least one of the NDPA frame and the SMR frame indicates at least one of to keep a transmit power constant and a transmit power of a Null Data PPDU (NDP); and wherein at least one of the NDPA frame and the SMR frame indicates to keep the transmit power constant via at least one of: an added field bit; a reserved value included in an NDP Target Received Signal Strength Indicator (RSSI) subfield; and a bit included in the NDP Target RSSI subfield.

2 . The device of claim 1 , wherein the managed sensing measurements are channel state information (CSI) measurements, and wherein the CSI measurements are associated with a parameter that is managed and monitored by at least one of a sensing initiator and a sensing responder.

3 . The device of claim 2 , wherein the parameter is at least one of a transmit power parameter and a beamforming steering matrix.

4 . The device of claim 1 , wherein:
the managed sensing measurements are CSI measurements; and the CSI measurements are associated with a parameter that is made constant by at least one of a sensing initiator and a sensing responder.

5 . The device of claim 1 , wherein:
the managed sensing measurements are CSI measurements; the CSI measurements are associated with a parameter that cannot be made constant by a sensing transmitter; and the sensing transmitter indicates its transmit power to a sensing receiver.

6 . The device of claim 1 , wherein at least one of the NDPA frame and the SMR frame indicates to keep the transmit power constant via a reserved value of “Oxff” included in an NDP Target RSSI subfield.

7 . The device of claim 1 , wherein at least one of the NDPA frame and the SMR frame indicates to keep the transmit power constant via at least one of a Most Significant Bit (MSB) and a Least Significant Bit (LSB) included in an NDP Target RSSI subfield.

8 . The device of claim 1 , wherein the device transmits an NDPA frame in a Trigger-Based (TB) sensing measurement exchange, and wherein the NDPA frame indicates to keep a transmit power of a down-link (DL) NDP frame constant.

9 . The device of claim 1 , wherein:
a modified Trigger Frame (TF) Sound frame indicates to keep a transmit power of an up-link (UL) NDP frame constant; and an SMR frame indicates the transmit power of the UL NDP frame.

10 . The device of claim 9 , wherein the modified TF Sound frame uses at least one of a redefined UL Target Receive Power subfield and a reserved bit included in a User Info field to indicate to keep the transmit power of the UL NDP frame constant.

11 . The device of claim 1 , wherein the device transmits an NDPA frame in a TB sensing measurement exchange, and wherein the NDPA frame indicates a transmit power of a DL NDP frame.

12 . The device of claim 11 , wherein the NDPA frame indicates the transmit power of the DL NDP frame via a Station (STA) Info field with an Association Identifier (AID) of 2045.

13 . The device of claim 1 , wherein the environmental changes are detected by using the managed sensing measurements to differentiate the environmental changes from system configuration changes.

14 . The device of claim 1 , wherein the managed sensing measurements are at least one of CSI measurements, power delay profiles, directional multi-gigabit (DMG) beamforming training measurements, and enhanced DMG (EDMG) beamforming training measurements.

15 . The device of claim 1 :
wherein the device is configured to keep the transmit power constant during a process of transmitting a set of consecutive sounding PPDUs.

16 . A device comprising:
a wireless network interface device implemented on one or more integrated circuits (ICs), wherein the wireless network interface device is configured to:
receive or transmit a sounding Physical Layer (PHY) Protocol Data Unit (PPDU) that includes preamble training fields; and
detect environmental changes using managed sensing measurements obtained from the preamble training fields included in the sounding PPDU;
wherein the device transmits at least one frame in a sensing measurement exchange indicating to keep a transmit power constant; wherein the device transmits an NDPA frame in a Trigger-Based (TB) sensing measurement exchange, and wherein the NDPA frame indicates to keep a transmit power of a down-link (DL) NDP frame constant.

17 . A device comprising:
a wireless network interface device implemented on one or more integrated circuits (ICs), wherein the wireless network interface device is configured to:
receive or transmit a sounding Physical Layer (PHY) Protocol Data Unit (PPDU) that includes preamble training fields; and
detect environmental changes using managed sensing measurements obtained from the preamble training fields included in the sounding PPDU;
wherein the device transmits at least one frame in a sensing measurement exchange indicating to keep a transmit power constant; wherein a modified Trigger Frame (TF) Sound frame indicates to keep a transmit power of an up-link (UL) NDP frame constant; and wherein an SMR frame indicates the transmit power of the UL NDP frame.

Assignees

• Nxp Usa Inc

Inventors

• Wei Dong
• Cao Rui
• Zhang Hongyuan
• Berger Christian Raimund
• Chu Liwen

Classifications

• H04W52/146

  Uplink power control · CPC title

• H04W52/54

  Signalisation aspects of the TPC commands, e.g. frame structure · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04B17/24

  with feedback of measurements to the transmitter · CPC title

• H04W24/08 Primary

  Testing, {supervising or monitoring} using real traffic · CPC title