公开(公告)号：US11171814B2

公开(公告)日：2021-11-09

申请号：US16786890

申请日：2020-02-10

Applicant: QUALCOMM Incorporated

Inventor： Bin Tian ,  Lin Yang ,  Sameer Vermani

IPC: H04L25/02 ,  H04B7/06 ,  H04L27/26 ,  H04B7/0452 ,  H04B7/0417

Abstract: This disclosure provides methods, devices and systems for providing channel feedback for multiple spatial streams. In some implementations, the techniques involve generating distinct channel estimates for different respective sets of orthogonal spatial streams. In some implementations, the orthogonality of the different sets of orthogonal spatial streams enables the beamformee to distinguish the spatial streams to provide the separate channel estimates. The beamformee may then determine separate correlations for the different respective sets of spatial streams. In some implementations, the beamformee combines the correlations to determine an average correlation for each of a number of sets of frequency tones. The beamformee may then perform an eigenvalue decomposition on a tone-by-tone basis based on the respective average correlation and the channel estimate obtained for the tone. Because the eigenvalue decomposition may be performed on each of the two sets of spatial streams separately, the complexity involved with performing each eigenvalue decomposition is greatly reduced.

公开(公告)号：US11165544B2

公开(公告)日：2021-11-02

申请号：US16592689

申请日：2019-10-03

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04B7/0452 ,  H04W84/12

Abstract: Methods, systems, and devices for wireless communications are described for control signaling in next generation wireless local area network (WLAN) environments. A message transmitted by an access point may allocate resources to a plurality of stations. The access point may be configured to allocate up to 320 MHz of total bandwidth along with coarse punctures. The access point may also allocate up to eight space-time streams to each station in a multi-user multiple-input multiple output (MU-MIMO) transmission, and support simultaneous transmission to up to sixteen stations. To support 320 MHz bandwidth and up to sixteen stations, one or more signaling fields used in other environments may be repurposed to effectively signal the additional resources available in a next generation WLAN.

公开(公告)号：US11160084B2

公开(公告)日：2021-10-26

申请号：US16503464

申请日：2019-07-03

Applicant: QUALCOMM Incorporated

Inventor： Alfred Asterjadhi ,  George Cherian ,  Abhishek Pramod Patil ,  Bin Tian

IPC: H04W72/04 ,  H04W84/12

Abstract: This disclosure provides methods, devices, and techniques to indicate operations by extremely high throughput (EHT) devices on an operating bandwidth, including devices in a basic service set (BSS) supporting the use of a 320 MHz channel. In some aspects, the supported functionality may include extensions to flexibility and support rules, structures, and signaling using legacy fields, frames, and features. In addition, the supported functionality may include channel sensing and reporting, such as per-channel network allocation vectors (NAVs) for the sub-channels of the operating bandwidth. A device may identify an operating mode for an operating bandwidth and determine a value for a bandwidth query report (BQR) or a target wake time (TWT) element. The device may check multiple NAVs for sub-channels of the operating bandwidth. The operating bandwidth may span concurrent operations on traditional Wi-Fi frequency bands including the 2.4 and 5 GHz bands as well as the 6 GHz band.

公开(公告)号：US11121822B2

公开(公告)日：2021-09-14

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 ,  H04W84/12

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：US20210281454A1

公开(公告)日：2021-09-09

申请号：US17190216

申请日：2021-03-02

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Youhan Kim

IPC: H04L27/26 ,  H04L1/00 ,  H04L5/00

Abstract: This disclosure provides methods, devices and systems that support communicating using orthogonal frequency division multiple access (OFDMA) according to a tone plan that supports 20 MHz subchannel puncturing within a wireless channel. In some aspects, a non-legacy tone plan may define a set of tones for a resource unit (RU) such that the RU does not overlap a 20 MHz subchannel boundary of the wireless channel. The locations of the set of tones in the non-legacy tone plan may be shifted relative to corresponding tones associated with a corresponding RU according to a legacy tone plan. One or more of the disclosed tone plans may enable puncturing of subchannels while making use of some RUs that would otherwise partially overlap a punctured subchannel in the legacy tone plan.

公开(公告)号：US11109278B2

公开(公告)日：2021-08-31

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 ,  H04W74/08 ,  H04W84/12 ,  H04L5/00 ,  H04L27/26 ,  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.

公开(公告)号：US11039446B2

公开(公告)日：2021-06-15

申请号：US16503464

申请日：2019-07-03

Applicant: QUALCOMM Incorporated

Inventor： Alfred Asterjadhi ,  George Cherian ,  Abhishek Pramod Patil ,  Bin Tian

IPC: H04W72/04 ,  H04W84/12

Abstract: This disclosure provides methods, devices, and techniques to indicate operations by extremely high throughput (EHT) devices on an operating bandwidth, including devices in a basic service set (BSS) supporting the use of a 320 MHz channel. In some aspects, the supported functionality may include extensions to flexibility and support rules, structures, and signaling using legacy fields, frames, and features. In addition, the supported functionality may include channel sensing and reporting, such as per-channel network allocation vectors (NAVs) for the sub-channels of the operating bandwidth. A device may identify an operating mode for an operating bandwidth and determine a value for a bandwidth query report (BQR) or a target wake time (TWT) element. The device may check multiple NAVs for sub-channels of the operating bandwidth. The operating bandwidth may span concurrent operations on traditional Wi-Fi frequency bands including the 2.4 and 5 GHz bands as well as the 6 GHz band.

公开(公告)号：US20210045117A1

公开(公告)日：2021-02-11

申请号：US16988624

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

IPC: H04W72/04 ,  H04L29/06

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：US20210036809A1

公开(公告)日：2021-02-04

申请号：US16945605

申请日：2020-07-31

Applicant: QUALCOMM Incorporated

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

IPC: H04L1/18 ,  H04B7/0456 ,  H04W80/02 ,  H04L1/00 ,  H04L1/16

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 transmit a first HARQ frame to a second WLAN device. The first HARQ frame may include initial transmissions of a first plurality of forward error correction (FEC) codewords. The HARQ protocol may support new techniques for feedback, such as a feedback capability in which a bitmap may be used to indicate decoding failures of codewords. The first feedback message may include indicators to change a HARQ configuration parameter based on channel conditions. In some implementations, the second HARQ frame may combine retransmissions regarding the failed codewords with initial transmissions of a second plurality of codewords.

公开(公告)号：US10897285B2

公开(公告)日：2021-01-19

申请号：US15872294

申请日：2018-01-16

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian

IPC: H04B7/024 ,  H04L5/00 ,  H04B7/0452 ,  H04W72/04 ,  H04B7/0417 ,  H04W84/12 ,  H04B7/06 ,  H04W16/28

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for group formation and sounding for distributed multi-user multiple input multiple output (MU-MIMO). Some implementations include a method of wireless communication. The method includes transmitting, from a first access point of a plurality of access points, an announcement frame for performing a beamforming procedure for a distributed transmission. The distributed transmission includes a transmission from the plurality of access points. The announcement frame includes at least one identifier of a user terminal in a different basic service set than a basic service set of the first access point. The method further includes transmitting a packet for measuring a channel. The method further includes receiving feedback information from the user terminal based on the packet for measuring the channel. The method further includes transmitting the distributed transmission using the beamforming procedure.