公开(公告)号：US11469859B2

公开(公告)日：2022-10-11

申请号：US16852364

申请日：2020-04-17

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Jialing Li Chen ,  Dung Ngoc Doan ,  Bin Tian ,  Youhan Kim ,  Alfred Asterjadhi

IPC: H04L1/18 ,  H04W8/24 ,  H04W80/02 ,  H04L5/00 ,  H04W84/12

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a retransmission protocol in a wireless local area network (WLAN). The retransmission protocol may be based on a hybrid automatic repeat request (HARQ) protocol that supports a delayed acknowledgement for a HARQ retransmission based on receiver processing capability. A first WLAN device may determine that a second WLAN device requires more time to process the HARQ retransmission and may transmit a different communication (interlaced within the HARQ process) to either the second WLAN device or a third WLAN device during the time that the second WLAN device is processing the HARQ retransmission.

公开(公告)号：US11271617B2

公开(公告)日：2022-03-08

申请号：US16591420

申请日：2019-10-02

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/0417 ,  H04B7/0456 ,  H04W84/12

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for null data packet (NDP) based implicit sounding and calibration for a wireless local area network (WLAN). An AP may perform a calibration procedure with one or more stations (STAs) that involves NDP transmissions. The AP may calibrate an effective downlink channel response to an effective uplink channel to compensate for transmit and receive chain differences. The AP may initiate implicit sounding by transmitting a downlink message that includes an uplink NDP announcement frame to the one or more STAs, prompting uplink multi-user (MU) NDP transmission. The AP may estimate the uplink channel based on measuring the received NDPs and mirror the estimated uplink channel for reciprocal downlink channel estimation and precoding generation. The AP may perform MU multiple input multiple output (MIMO) downlink transmission that is precoded based on the channel estimation.

公开(公告)号：US11233608B2

公开(公告)日：2022-01-25

申请号：US16855885

申请日：2020-04-22

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Stephen Jay Shellhammer ,  Alfred Asterjadhi ,  Dung Ngoc Doan ,  Bin Tian ,  Youhan Kim

IPC: H04L1/18 ,  H04W28/04 ,  H04L5/00 ,  H04L1/00

Abstract: This disclosure provides systems, methods and apparatuses for data retransmissions in a wireless network. In some implementations, a wireless communication device may transmit a first data unit to a receiving device, may receive a first hybrid automatic repeat request (HARQ) feedback frame indicating that a portion of the first data unit was not successfully decoded by the receiving device, may retransmit the indicated portion of the first data unit to the receiving device in response to the first HARQ feedback frame, and may transmit a second data unit, different than the first data unit, to the receiving device concurrently with the retransmission of the indicated portion of the first data unit.

公开(公告)号：US20210135792A1

公开(公告)日：2021-05-06

申请号：US16668769

申请日：2019-10-30

Applicant: QUALCOMM Incorporated

Inventor： James Simon Cho ,  Tao-Fei Samuel Ng ,  Youhan Kim ,  Bin Tian ,  Jialing Li Chen ,  Stephen Jay Shellhammer ,  Vincent Knowles Jones, IV

IPC: H04L1/18

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A first WLAN device may generate a first HARQ packet for transmission to a second WLAN device. The first WLAN device may determine a first basic service set (BSS) indicator and a second BSS indicator for a BSS associated with the first WLAN device and the second WLAN device. The first BSS indicator and the second BSS indicator may be indicative of a BSS identifier (BSSID) of the BSS. The first WLAN device may output the first HARQ packet for transmission to the second WLAN device. The first HARQ packet may include the first BSS indicator and the second BSS indicator in one or more fields of a physical layer (PHY) header of the first HARQ packet.

公开(公告)号：US10958391B2

公开(公告)日：2021-03-23

申请号：US14938794

申请日：2015-11-11

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Dung Doan ,  Jialing Li Chen ,  Youhan Kim

IPC: H04L5/00 ,  H04L27/26

Abstract: Methods and apparatuses for communicating over a wireless communication network are disclosed herein. One example apparatus includes a memory that stores instructions. The apparatus further includes a processor coupled with the memory. The processor and the memory are configured to determine a total bandwidth for a transmission of a message, the total bandwidth including a plurality of tones. The processor is further configured to divide the plurality of tones in the total bandwidth into one or more 26-, 52-, 106-, 242-, or 996-tone blocks. The processor is further configured to determine an indication. The indication assigns one or more of the one or more tone blocks to a first wireless communication device. The apparatus further includes a transmitter configured to transmit the indication to at least the first wireless communication device or a second device.

公开(公告)号：US20210045151A1

公开(公告)日：2021-02-11

申请号：US16988631

申请日：2020-08-08

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Sameer Vermani ,  Lin Yang ,  Bin Tian ,  Vincent Knowles Jones, IV ,  Youhan Kim ,  Ahmed Ragab Elsherif

IPC: H04W74/00 ,  H04L5/00 ,  H04W72/04

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for including signaling regarding enhanced features of new wireless communication protocols. The signaling may be included in various portions of a physical layer preamble of a wireless transmission. In some implementations, the physical layer preamble may be used to indicate puncturing of subbands or content channels that may carry further signaling in accordance with preamble signaling designs of this disclosure. The physical layer preamble signaling be parallelized for different subchannels of a wireless channel that consists of multiple subchannels. Some implementations of the physical layer preambles may be used to multiplex different types of wireless local area network communications into different subsets of the plurality of subchannels of the wireless channel.

公开(公告)号：US10355956B2

公开(公告)日：2019-07-16

申请号：US15260131

申请日：2016-09-08

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Youhan Kim

IPC: H04L12/26 ,  H04W72/04 ,  H04W52/36 ,  H04L27/26 ,  H04W84/12 ,  H04W88/02

Abstract: Methods, systems, and devices are described for wireless communications. A wireless station includes a transmitter to generate a wideband contiguous waveform in a band. The transmitter transmits the waveform that conforms to spectral masking attributes and spectral flatness attributes. The wireless station, or another device supporting spectrum analysis functions, detects a wideband contiguous waveform and performs spectrum analysis of the waveform. The wireless station includes a resolution bandwidth of 25 KHz and a video bandwidth of 7.5 KHz.

公开(公告)号：US10200101B2

公开(公告)日：2019-02-05

申请号：US15052834

申请日：2016-02-24

Applicant: QUALCOMM Incorporated

Inventor： Simone Merlin ,  Youhan Kim ,  Bin Tian ,  George Cherian ,  Alfred Asterjadhi ,  Sameer Vermani ,  Gwendolyn Denise Barriac

IPC: H04W4/00 ,  H04B7/06 ,  H04W72/04 ,  H04L1/00 ,  H04L5/00 ,  H04W84/12 ,  H04W28/18

Abstract: Methods and apparatus for channel state information feedback are provided. In various aspects, a message is transmitted to one or more wireless communication devices requesting channel state information. In some aspects, a first portion of the message is transmitted according to a first or second, and contains first information intended for a first or second set of wireless communication devices compatible with the first or second format respectively. In some aspects, a second portion of the first message is transmitted according to the second format, and contains second information intended for the second set of wireless communication devices compatible with the second format. In some aspects, this information may comprise at least one of a list of identifiers, a set of parameters for estimating the channel state information estimation, and uplink transmission allocation information.

公开(公告)号：US10200097B2

公开(公告)日：2019-02-05

申请号：US15470500

申请日：2017-03-27

Applicant: QUALCOMM Incorporated

Inventor： Beomsup Kim ,  Ning Zhang ,  Xiaoxin Zhang ,  Youhan Kim

IPC: H04B7/06 ,  H04B7/0456 ,  H04B17/327 ,  H04B7/08 ,  H04L25/02 ,  H04W84/12 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. An access point (AP) may switch antenna array configurations during reception of a packet to determine channel characteristic information for the antenna array configurations. The AP may use the channel characteristic information to select an antenna array configuration for use, and to determine a beamforming steering matrix for the selected antenna array configuration. In some cases, the AP may use multiple antenna array configurations to transmit training fields in the preamble of a packet. The AP may receive channel characteristic information for each of the antenna array configurations. The AP may use the channel characteristic information to select an antenna array configuration for use, and to determine a beamforming steering matrix for the selected antenna array configuration.

公开(公告)号：US10075873B2

公开(公告)日：2018-09-11

申请号：US15052808

申请日：2016-02-24

Applicant: QUALCOMM Incorporated

Inventor： Simone Merlin ,  Youhan Kim ,  Bin Tian ,  George Cherian ,  Sameer Vermani ,  Alfred Asterjadhi

IPC: H04W4/00 ,  G08C17/00 ,  G05D1/02 ,  H04W28/06 ,  H04L5/00 ,  H04W72/04 ,  H04L1/00 ,  H04W84/12

CPC classification number: H04W28/06 ,  H04L1/0026 ,  H04L1/0027 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0057 ,  H04W72/0413 ,  H04W84/12

Abstract: Methods and apparatus for channel state information sounding and feedback are provided. In an aspects, a first message is transmitted to one or more wireless communication devices requesting channel state information. In accordance with this aspects, the first message comprises a header and a payload, the header comprising a plurality of fields of a first field type which are useable to determine the channel state information, and the payload comprising parameters for estimating the channel state information. In certain aspects, the channel state information parameters are also provided in the header of the first message. In various aspects a second message comprising the channel state information is received from the one or more wireless communication devices. In one aspect, the first message is a physical layer convergence protocol data unit (PPDU), and the first field type is a long training field (LTF).