公开(公告)号：US12250105B2

公开(公告)日：2025-03-11

申请号：US18390180

申请日：2023-12-20

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Alireza Raissinia ,  Youhan Kim

IPC: H04L27/26 ,  H04B7/0452 ,  H04L5/00

Abstract: This disclosure provides methods, devices and systems for generating a secure long training field (LTF). In some implementations, the secure LTF may include a randomized bit sequence that is difficult, if not impossible, to replicate by any device other than the transmitting device and the intended receiving device. For example, the transmitting device may use a block cipher or stream cipher to generate a pseudorandom bit sequence and may select a subset of bits of the pseudorandom bit sequence to be mapped to a sequence of modulation symbols representing an LTF symbol of the secure LTF. More specifically, each of the modulation symbols is mapped to a respective one of a number of subcarriers spanning a bandwidth of the secure LTF. The transmitting device may further transmit a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF to the receiving device.

公开(公告)号：US12126416B2

公开(公告)日：2024-10-22

申请号：US18452430

申请日：2023-08-18

Applicant: QUALCOMM Incorporated

Inventor： Simone Merlin ,  Alireza Raissinia ,  Bin Tian ,  Xiaoxin Zhang ,  Solomon Trainin ,  Assaf Yaakov Kasher ,  Manish Madan ,  John Greszczuk

IPC: H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04W74/0816 ,  H04W80/02

CPC classification number: H04B7/0626 ,  H04B7/0617 ,  H04L5/0053 ,  H04L25/0226 ,  H04W74/0816 ,  H04W80/02

Abstract: This disclosure provides methods, devices and systems for radio frequency (RF) sensing in wireless communication systems. In some implementations, a transmitter device transmits sounding sequences configured for channel estimation over a wireless channel to a receiver device. The transmitter device also transmits or receives non-sounding frames associated with a channel report of the receiver device. The transmitter device transmits a frame soliciting the channel report from the receiver device. The transmitter device receives the channel report, which may include channel state information (CSI) of the wireless channel responsive to at least the sounding sequences. Some types of channel reports may take longer to generate than other types of channel reports. Transmitting or receiving the non-sounding frames during the time period may prevent other devices from accessing the wireless channel when the receiver device needs additional time to generate a certain type of channel report.

公开(公告)号：US11546196B2

公开(公告)日：2023-01-03

申请号：US17244500

申请日：2021-04-29

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Alireza Raissinia ,  Youhan Kim

IPC: H04L27/26 ,  H04L5/00 ,  H04B7/0452

Abstract: This disclosure provides methods, devices and systems for generating a secure long training field (LTF). In some implementations, the secure LTF may include a randomized bit sequence that is difficult, if not impossible, to replicate by any device other than the transmitting device and the intended receiving device. For example, the transmitting device may use a block cipher or stream cipher to generate a pseudorandom bit sequence and may select a subset of bits of the pseudorandom bit sequence to be mapped to a sequence of modulation symbols representing an LTF symbol of the secure LTF. More specifically, each of the modulation symbols is mapped to a respective one of a number of subcarriers spanning a bandwidth of the secure LTF. The transmitting device may further transmit a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF to the receiving device.

公开(公告)号：US20220217614A1

公开(公告)日：2022-07-07

申请号：US17706075

申请日：2022-03-28

Applicant: QUALCOMM Incorporated

Inventor： Abhishek Pramod Patil ,  George Cherian ,  Alfred Asterjadhi ,  Sandip Homchaudhuri ,  Maarten Menzo Wentink ,  Alireza Raissinia ,  Lochan Verma ,  Padmanabhan Venkataraman Karthic

IPC: H04W40/24 ,  H04W8/00 ,  H04W80/02 ,  H04W80/08 ,  H04W28/02 ,  H04W8/24

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for high efficiency (HE) beacons. HE supported access points (APs) and stations (STAs) may operate on resource deployments used for Wi-Fi technology and without support for legacy devices, also referred to as a greenfield deployment. An AP may identify updated capability information and transmit a HE physical layer convergence protocol (PLCP) protocol data unit (PPDU) including a beacon frame. A STA may receive, from the AP, the HE or EHT PPDU and identify an indication of change to a content or format of the beacon frame relative to a reference beacon frame. Based on the identified indication, the STA may then determine an updated content or format for the beacon frame and process the beacon frame or skip processing for one or more portions of the beacon frame.

公开(公告)号：US20200213933A1

公开(公告)日：2020-07-02

申请号：US16707825

申请日：2019-12-09

Applicant: QUALCOMM Incorporated

Inventor： Abhishek Pramod Patil ,  George Cherian ,  Alfred Asterjadhi ,  Sandip Hom Chaudhuri ,  Maarten Menzo Wentink ,  Alireza Raissinia ,  Lochan Verma ,  Padmanabhan Venkataraman Karthic

IPC: H04W40/24 ,  H04W8/00 ,  H04W8/24 ,  H04W80/08 ,  H04W28/02 ,  H04W80/02

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for high efficiency (HE) beacons. HE supported access points (APs) and stations (STAs) may operate on resource deployments used for Wi-Fi technology and without support for legacy devices, also referred to as a greenfield deployment. An AP may identify updated capability information and transmit a HE physical layer convergence protocol (PLCP) protocol data unit (PPDU) including a beacon frame. A STA may receive, from the AP, the HE or EHT PPDU and identify an indication of change to a content or format of the beacon frame relative to a reference beacon frame. Based on the identified indication, the STA may then determine an updated content or format for the beacon frame and process the beacon frame or skip processing for one or more portions of the beacon frame.

公开(公告)号：US20200099495A1

公开(公告)日：2020-03-26

申请号：US16267822

申请日：2019-02-05

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxin Zhang ,  Sunil Ravi ,  Kurt Erwin Landenberger ,  Alireza Raissinia

IPC: H04L5/00 ,  H04L27/26

Abstract: In some implementations, an apparatus transmits information indicating a modulation and coding scheme (MCS) table for transmitting non-legacy acknowledgement (ACK) frames during a ranging operation to a responder device, receives a ranging frame including an indication of whether the responder device is capable of supporting the indicated MCS table, and transmits to the responder device an ACK frame using an MCS that is based on the capability of the responder device to support the MCS table. In other implementations, the apparatus receives from an initiator device information indicating an MCS table for transmitting non-legacy ACK frames during the ranging operation, transmits a ranging frame including an indication of whether the apparatus is capable of supporting the indicated MCS table, and receives from the initiator device an ACK frame transmitted using an MCS that is based on the capability of the apparatus to support the MCS table.

公开(公告)号：US10524161B2

公开(公告)日：2019-12-31

申请号：US14464019

申请日：2014-08-20

Applicant: QUALCOMM Incorporated

Inventor： Sandip HomChaudhuri ,  Alireza Raissinia ,  James Gardner ,  Sumeet Kumar ,  Vincent Knowles Jones, IV

IPC: H04W28/04 ,  H04W24/02 ,  H04W28/02

Abstract: Methods, systems, and devices are described for wireless communication at a wireless communication device. A wireless communication device may receive a data frame and use it to estimate a residual channel length (RCL). The device may then modify a finite impulse response (FIR) filter based on the estimated RCL. For example, the device may add additional taps to the FIR filter. The device may continue to adjust the FIR filter until the RCL is at or near zero. In some cases, the wireless communication device may send an indication to the transmitting device to adjust an FIR filter based on the estimated RCL. In some cases, the length of a guard interval may also be adjusted based on the estimated RCL.

公开(公告)号：US20190166572A1

公开(公告)日：2019-05-30

申请号：US16203225

申请日：2018-11-28

Applicant: QUALCOMM Incorporated

Inventor： Santosh Paul Abraham ,  Abhishek Pramod Patil ,  Alireza Raissinia ,  Shivraj Singh Sandhu

IPC: H04W56/00 ,  H04W24/08 ,  H04W8/00 ,  H04W48/16 ,  H04L12/26

Abstract: Methods, systems, and devices for wireless communication are described. Stations within a neighborhood awareness network (NAN) may determine when to transmit synchronization beacons during a wake-up time based on some priority (e.g., stations with more recent clock updates or earlier time stamps, stations communicating with a larger number of peers or associated with a larger number of NAN device links (NDLs), etc. may transmit beacons earlier in a wake-up window or with a higher probability). Other stations within the NAN may maintain clock synchronization based on the transmitted beacons (e.g., that include recently updated clock information). Additionally or alternatively, a station may signal other stations within a NAN when the station detects disappearance of synchronization beacons (e.g., or loss of clock synchronization). In some cases, the signaling may include requests for the one or more other stations to start or stop beacon transmissions as desired.

公开(公告)号：US10278150B2

公开(公告)日：2019-04-30

申请号：US15802647

申请日：2017-11-03

Applicant: QUALCOMM Incorporated

Inventor： Santosh Paul Abraham ,  Alireza Raissinia ,  Abhishek Pramod Patil ,  George Cherian ,  Shivraj Singh Sandhu

IPC: H04W56/00 ,  H04W40/24 ,  H04W72/06 ,  H04L12/26 ,  H04W48/00 ,  H04W84/18 ,  H04W88/12 ,  H04W84/20 ,  H04W8/00

Abstract: Aspects of the present disclosure provide techniques for synchronizing clocks in a Neighbor Aware Network (NAN) Data Link (NDL) cluster. An exemplary apparatus includes a processing system configured to communicate with one or more members of a group, that includes the apparatus, according to a first data communication window (DCW) timeline having a first offset relative to a first clock associated with a first network cluster, to detect a beacon transmitted by a device of a second network cluster, wherein the beacon comprises timing information of a second clock associated with the second network cluster, to determine whether to initiate a move of the group to the second network cluster, to generate a frame to initiate the move of the group to the second network cluster, the frame comprising a first indication of the timing information of the second clock, and an interface configured to output the frame for transmission.

公开(公告)号：US20180199215A1

公开(公告)日：2018-07-12

申请号：US15860030

申请日：2018-01-02

Applicant: QUALCOMM Incorporated

Inventor： Abhishek Pramod Patil ,  Alfred Asterjadhi ,  Alireza Raissinia ,  Ravi Gidvani ,  George Cherian ,  Jeffrey Louis Smith

IPC: H04W24/02 ,  H04W52/02

CPC classification number: H04W24/02 ,  H04L1/0003 ,  H04L1/0006 ,  H04L1/0022 ,  H04L1/0025 ,  H04W48/12 ,  H04W48/16 ,  H04W52/0225 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/1224 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/14 ,  Y02D70/142 ,  Y02D70/144

Abstract: This disclosure provides systems, methods and apparatuses for selectively acquiring communication frames from a transmitting device capable of formatting the communication frames in accordance with a plurality of PHY formats. In some implementations, a STA may filter or discard duplicate frames received from an AP based, at least in part, on a preference of the STA for one of the plurality of PHY formats. The filtering may be performed at the PHY, without forwarding received communication frames to the media access control layer (MAC) for further processing. In some other implementations, an AP may refrain from sending duplicate frames to a STA based, at least in part, on a preferred frame format of the STA. Still further, in some implementations, the STA may dynamically adjust or update its preferred frame format based on changes in the distance, or channel conditions, between the STA and the AP.