IP Library › Granted Patent US 12,495,400
Granted Patent B2
US 12,495,400 · App. 18/064,653 · Granted Dec 9, 2025

Null data packet announcement for sensing

Inventors: Liwen Chu (San Ramon, CA); Dong Wei (Austin, TX); Hongyuan Zhang (Fremont, CA); Christian Raimund Berger (San Jose, CA)
Assignee: NXP USA, Inc.
H04W72/0446H04L5/0048H04W24/10
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Quick Facts
Patent No.
US 12,495,400
App. No.
18/064,653
Granted
Dec 9, 2025
Kind
B2
Abstract

Various embodiments relate to a first wireless device configured to establish sensing with a second wireless device, including: a transmitter configured to: transmit a null data packet announcement (NDPA) frame to the second wireless device configured to include an indication that the NDPA frame is a sensing NDPA frame; transmit a null data packet (NDP) frame to the second wireless device; a receiver configured to: receive a frame from the second wireless device indicating sensing information.

Claims (24)

1 . A first wireless device configured to establish sensing with a second wireless device, comprising:

a transmitter configured to:

transmit a null data packet announcement (NDPA) frame to the second wireless device configured to include an indication that the NDPA frame is a sensing NDPA frame; and

transmit a null data packet (NDP) frame to the second wireless device; and

a receiver configured to:

receive a frame from the second wireless device containing sensing measurement results, wherein a first reserved field and a second reserved field of a STA Info field of the NDPA frame indicates frame exchange sequence to be used between the first wireless device and the second wireless device.

2 . The first wireless device of claim 1 , wherein the NDPA frame indicates that it is a sensing NDPA frame based upon a STA Info field of the NDPA frame.

3 . The first wireless device of claim 1 , wherein the NDPA frame indicates that it is a sensing NDPA frame based upon AID11 and Sensing subfields in a STA Info field of the NDPA frame.

4 . The first wireless device of claim 3 , wherein the AID11 subfield having a specified value and the Sensing subfield being set to a predetermined value indicate that the NDPA frame is a sensing NDPA frame.

5 . The first wireless device of claim 3 , wherein the frame received from the second wireless device is a measurement report frame.

6 . The first wireless device of claim 3 , wherein the frame received from the second wireless device is a sensing responder to the NDP frame sent by a sensing initiator.

7 . The first wireless device of claim 1 , wherein the NDPA frame indicates that it is a ranging NDPA frame or a sensing NDPA frame based upon an NDPA variant subfield of a sounding dialog token field of the NDPA frame.

8 . The first wireless device of claim 7 , wherein the NDPA variant subfield has a value of 01.

9 . A method of sensing measurement exchange between a first wireless device and a second wireless device, comprising:

transmitting, by the first wireless device, a null data packet announcement (NDPA) frame to the second wireless device configured to include an indication that the NDPA frame is a sensing NDPA frame;

transmitting, by the first wireless device, a null data packet (NDP) frame to the second wireless device; and

receiving, by the first wireless device, a frame from the second wireless device containing sensing measurement results, wherein a first reserved field and a second reserved field of a STA Info field of the NDPA frame indicates frame exchange sequence to be used between the first wireless device and the second wireless device.

10 . The method of claim 9 , wherein the NDPA frame indicates that it is a sensing NDPA frame based upon a STA Info field of the NDPA frame.

11 . The method of claim 10 , wherein the NDPA frame indicates that it is a ranging NDPA frame or a sensing NDPA frame based upon an NDPA variant subfield of a sounding dialog token field of the NDPA frame.

12 . The method of claim 11 , wherein a NDPA variant field has a value of 01.

13 . The method of claim 9 , wherein the NDPA frame indicates that it is a sensing NDPA frame based upon an AID11 subfield and a Sensing subfield in a STA Info field of the NDPA frame.

14 . The method of claim 13 , wherein the AID11 subfield having a specified value and the Sensing subfield being set to a predetermined value indicates that the NDPA frame is a sensing NDPA frame.

15 . The method of claim 14 , wherein the frame received from the second wireless device is a measurement report frame.

16 . The method of claim 14 , wherein the frame received from the second wireless device is a responder to initiator NDP frame.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 12, 2022
From: CHU, LIWEN; WEI, DONG; ZHANG, HONGYUAN; BERGER, CHRISTIAN RAIMUND
To: NXP USA, INC.
Reel/Frame 062059/0207 →
Continuity (2)
Provisional Application 63265362 · Dec 14, 2021
Related Publication 20230189223A1 · Jun 15, 2023
References Cited (8)
US 20200132857A1 · Berger · 2020 [cited by examiner]
Satyanarayana et al., “Sensing-specfic feedback using NDPA and trigger frames”, InterDigital, Sep. 15, 2021. (From Applicant's IDS) (Year: 2021). [cited by examiner]
Dobgguk Lim et al., “Consideration for NDPA in 11BF”, LG, Nov. 15, 2021. (From Applicant's IDS) (Year: 2021). [cited by examiner]
Satynarayana Katla et al.; “Sensing-Specific Feedback Using NDPA and Trigger Frames”; Interdigital; Sep. 15, 2021. [cited by applicant]
Dongguk Lim et al.; “Consideration for NDPA in 11BF”; Interdigital; Nov. 15, 2021. [cited by applicant]
Junghoon Suh et al., “NDPA for Sensing”; Interdigital; Nov. 15, 2021. [cited by applicant]
P802.11az™/D4.0, Working Group of LAN/WAN Standard Committee of the IEEE; “Draft Standard for Information Technology—Telecommunications and Information Exchange Between Systems Local and Metropolitan Area Networks—Speci… [cited by applicant]
IEEE P802.11be™M/D1.3, Working Group of LAN/WAN Standard Committee of the IEEE; “Draft Standard for Information Technology—Telecommunications and Information Exchange Between Systems Local and Metropolitan Area Networks… [cited by applicant]