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    Techniques for preamble puncturing
    61.
    发明授权
    Techniques for preamble puncturing 有权

    公开(公告)号：US10827385B2

    公开(公告)日：2020-11-03

    申请号：US16173481

    申请日：2018-10-29

    Applicant: QUALCOMM Incorporated

    Inventor： Lochan Verma ,  Bin Tian ,  Lin Yang ,  Jialing Li Chen ,  Sameer Vermani ,  Youhan Kim

    IPC: H04W28/06 ,  H04L5/00 ,  H04W84/12

    Abstract: The present disclosure provides techniques for preamble puncturing in wireless local area networks (WLANs). In one implementation, an access point (AP) can identify, within a channel width, one or more bandwidth regions associated with incumbent technologies. The AP can broadcast or advertise, to a basic service set (BSS) initiated or started by the AP, a preamble puncture pattern in one or more management frames, the preamble puncture pattern being based on the bandwidth regions associated with incumbent technologies. In another implementation, an AP can identify a single user (SU) preamble puncture transmission, and can signal in a common portion of a SIG-B field of a multi-user (MU) PPDU format that a resource unit (RU) size is assigned to a same user to indicate the SU preamble puncture transmission. Although these techniques may be used in any frequency band, typical frequency bands may include, but are not limited to, a 2.4 GHz band, a 5 GHz band, and/or a 6 GHz band.

    Spectral mask and flatness for wireless local area networks
    62.
    发明授权
    Spectral mask and flatness for wireless local area networks 有权

    公开(公告)号：US10728861B2

    公开(公告)日：2020-07-28

    申请号：US16154530

    申请日：2018-10-08

    Applicant: QUALCOMM Incorporated

    Inventor： Jialing Li Chen ,  Lin Yang ,  Bin Tian ,  Sameer Vermani ,  Lochan Verma

    IPC: H04W52/36 ,  H04B1/7156 ,  H04W52/16 ,  H04W72/04 ,  H04L5/00 ,  H04L25/03 ,  H04W52/26 ,  H04W52/22 ,  H04L27/26 ,  H04W52/28

    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may identify a transmission mode for transmission of an input signal to be transmitted. The input signal may thus be modulated according to the identified transmission mode, and the modulated signal may then be transmitted at some power level to produce a transmitted signal having a spectral envelope. In some cases, the spectral envelope may be defined in terms of a power spectral density (PSD) of the transmitted waveform. The PSD may generally define the power of the waveform signal distributed over frequencies of the waveform. Further, the wireless device may control the modulation of the input signal, in addition to the power level of the input signal, to maintain the spectral envelope to be within a spectral mask defined for the implemented transmission mode as well as to conform to spectral flatness parameters.

    CLEAR CHANNEL ASSESSMENT (CCA) FOR A WIDE BANDWIDTH CHANNEL
    63.
    发明申请
    CLEAR CHANNEL ASSESSMENT (CCA) FOR A WIDE BANDWIDTH CHANNEL 审中-公开

    公开(公告)号：US20200178299A1

    公开(公告)日：2020-06-04

    申请号：US16675824

    申请日：2019-11-06

    Applicant: QUALCOMM Incorporated

    Inventor： Lin Yang ,  Bin Tian

    IPC: H04W74/08

    Abstract: This disclosure provides methods, devices, systems, and computer programs encoded on storage media, for clear channel assessment (CCA) for a wide bandwidth channel. For example, a wide bandwidth channel may have a bandwidth that is greater than 160 MHz bandwidth. An example wide bandwidth channel has a 320 MHz bandwidth. The CCA techniques include detection thresholds that may be used for wide bandwidth channels. In some implementations, a CCA process may be extended to include assessments of extended portions of a wide bandwidth channel (such as a tertiary 80 MHz bandwidth channel and a quaternary 80 MHz bandwidth channel). In some implementations, a CCA process may be extended to use an assessment of a secondary channel of the wide bandwidth channel that has a 160 MHz bandwidth.

    TECHNIQUES FOR REDUCING FEEDBACK INFORMATION
    64.
    发明申请
    TECHNIQUES FOR REDUCING FEEDBACK INFORMATION 审中-公开

    公开(公告)号：US20200153491A1

    公开(公告)日：2020-05-14

    申请号：US16579471

    申请日：2019-09-23

    Applicant: QUALCOMM Incorporated

    Inventor： Lin Yang ,  Bin Tian ,  Jialing Li Chen ,  Sameer Vermani

    IPC: H04B7/06 ,  H04L25/02 ,  H04B7/0417

    Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for techniques for reducing feedback information in an extremely high throughput (EHT) wireless local area network (WLAN). A receiving device (beamformee), such as a station (STA), may receive a sounding signal from a transmitting device (beamformer), such as an access point (AP), and transmit channel feedback. The receiving device may transmit the channel feedback as part of a reduced compressed beamforming feedback (CBF) operation that includes determining a first set of channel characteristics. The receiving device may select a subset of the first set of channel characteristics and determine a set of differential characteristics based on the subset. The transmitting device may then transmit the sets of characteristics as reduced CBF to the transmitting device. The transmitting device may determine a channel estimation for beamformed signaling based on the reduced CBF.

    ORTHOGONAL MULTIPLEXING OF HIGH EFFICIENCY (HE) AND EXTREMELY HIGH THROUGHPUT (EHT) WIRELESS TRAFFIC
    66.
    发明申请
    ORTHOGONAL MULTIPLEXING OF HIGH EFFICIENCY (HE) AND EXTREMELY HIGH THROUGHPUT (EHT) WIRELESS TRAFFIC 审中-公开

    公开(公告)号：US20200045656A1

    公开(公告)日：2020-02-06

    申请号：US16509117

    申请日：2019-07-11

    Applicant: QUALCOMM Incorporated

    Inventor： Lochan Verma ,  Bin Tian ,  Sameer Vermani ,  Lin Yang

    IPC: H04W56/00 ,  H04J3/06 ,  H04L29/06 ,  H04L27/26 ,  H04L5/00

    Abstract: This disclosure provides systems, methods, apparatus, including computer programs encoded on computer storage media for orthogonal multiplexing of high efficiency (HE) and extremely high throughput (EHT) wireless traffic. Devices in a wireless local area network (WLAN) may operate under HE or EHT conditions. An access point (AP) may support both HE and EHT communications with WLAN devices. To enable substantially simultaneous downlink HE and EHT transmissions and substantially simultaneous uplink HE and EHT transmissions, the AP may support orthogonal frequency-division multiple access (OFDMA) of HE and EHT transmissions. For example, pre-HE and pre-EHT modulated fields, HE and EHT modulated fields, and payloads may be aligned in time for the HE and EHT transmissions. The AP may ensure orthogonality for multiplexing the HE and EHT transmissions based on the alignment. In some implementations, a trigger frame may be utilized to indicate uplink transmission alignments.

    Methods and systems for joint access point MIMO transmissions
    67.
    发明授权
    Methods and systems for joint access point MIMO transmissions 有权

    公开(公告)号：US10454538B2

    公开(公告)日：2019-10-22

    申请号：US16125654

    申请日：2018-09-07

    Applicant: QUALCOMM Incorporated

    Inventor： Sameer Vermani ,  Bin Tian ,  Lochan Verma ,  Jialing Li Chen ,  Lin Yang

    IPC: H04B7/0417 ,  H04B7/0456 ,  H04B7/024 ,  H04L5/00

    Abstract: One aspect includes a method of establishing, via a first access point, a distributed MIMO joint transmission opportunity with one or more second access points to one or more stations. The method comprises generating, via a processor, a first message for transmission to the stations and the second access points. The first message indicates a null data packet transmission and the stations configured to receive a stream during the joint transmission opportunity. The method also comprises transmitting the first message to the second access points and the stations. The method further comprises generating, via the processor, a reference phase signal for transmission to the second access points.

    MULTIPLEXING CLIENTS OF DIFFERENT GENERATIONS IN TRIGGER-BASED TRANSMISSIONS
    69.
    发明申请
    MULTIPLEXING CLIENTS OF DIFFERENT GENERATIONS IN TRIGGER-BASED TRANSMISSIONS 审中-公开

    公开(公告)号：US20190124556A1

    公开(公告)日：2019-04-25

    申请号：US16162804

    申请日：2018-10-17

    Applicant: QUALCOMM Incorporated

    Inventor： Lochan Verma ,  Bin Tian ,  Sameer Vermani ,  Lin Yang ,  Jialing Li Chen ,  George Cherian

    IPC: H04W28/26 ,  H04W72/04 ,  H04W88/10

    Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for multiplexing clients of different generations in trigger-based transmissions, including trigger-based transmissions in extremely-high throughput (EHT) Wi-Fi systems. An access point (AP) may generate a trigger frame compatible with two types of stations (STAs), such as EHT STAs and legacy (or high efficiency (HE)) STAs. The AP may transmit the trigger frame to a group of STAs, where legacy STAs may process the trigger frame a legacy trigger frame. EHT STAs may process the trigger frame to determine resource unit (RU) allocations for uplink transmissions in a bandwidth greater than a legacy bandwidth. An EHT STA may determine the resources in the larger bandwidth based on an EHT RU allocation table, a legacy RU allocation table and an additional bit in the trigger frame, or an ordering of RU allocations in the trigger frame.

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