公开(公告)号：US20220078634A1

公开(公告)日：2022-03-10

申请号：US17525687

申请日：2021-11-12

Applicant: QUALCOMM Incorporated

Inventor： Sameer VERMANI ,  Bin Tian ,  Lin Yang

IPC: H04W16/28 ,  H04W56/00 ,  H04L25/02 ,  H04L1/16 ,  H04W72/04

Abstract: This disclosure provides systems, methods, and apparatuses for concurrently transmitting beamformed data from each of a plurality of access points (APs) to a wireless station (STA). In some implementations, the plurality of APs may operate as a distributed antenna array, and carrier signals of the plurality of APs may be synchronized with each other. A beamforming steering matrix may be determined for each of the plurality of APs, and beamformed data may be concurrently transmitted from each of the plurality of APs to the STA based on corresponding ones of the plurality of beamforming steering matrices.

公开(公告)号：US20210211229A1

公开(公告)日：2021-07-08

申请号：US17140626

申请日：2021-01-04

Applicant: QUALCOMM Incorporated

Inventor： Dung Ngoc DOAN ,  Lin Yang ,  Didier Johannes Richard Van Nee ,  Bin Tian ,  Thomas Joseph Richardson ,  Stephen Jay Shellhammer

IPC: H04L1/00 ,  H03M13/11 ,  H03M13/00 ,  G06F17/18 ,  G06F1/03

Abstract: This disclosure provides methods, devices and systems for encoding data in wireless communications. Some implementations more specifically relate to performing a first encoding operation on data bits of a code block to shape the amplitudes of the resultant symbols such that the amplitudes have a non-uniform distribution. In some aspects, the probabilities associated with the respective amplitudes generally increase with decreasing amplitude. For example, the non-uniform distribution of the amplitudes of the symbols may be approximately Gaussian. In some aspects, the first encoding operation is or includes a prefix encoding operation having an effective coding rate greater than 0.94 but less than 1. The first encoding operation is followed by a second encoding operation that also adds redundancy but does not alter the data bits themselves. In some aspects, the second encoding operation is or includes a low-density parity-check (LDPC) encoding operation associated with a coding rate greater than 5/6.

公开(公告)号：US20210194629A1

公开(公告)日：2021-06-24

申请号：US17121642

申请日：2020-12-14

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Sameer Vermani ,  Lin Yang ,  Jialing Li Chen ,  Dung Ngoc Doan ,  Bin Tian

IPC: H04L1/00 ,  H04W24/10 ,  H04B7/0452 ,  H04B7/06

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for a link adaptation protocol in a wireless local area network (WLAN). In one aspect, the link adaptation protocol may be used to select a transmission rate option (such as a modulation and coding scheme (MCS)) for communications from a first WLAN device to a second WLAN device based on wireless channel conditions. This disclosure includes several example message sequences for the link adaptation protocol which can accommodate a variety of uplink or downlink data transmission designs, including single user (SU) and multi-user (MU) transmissions. The example message sequences may be used with orthogonal frequency division multiple access (OFDMA), multiple-input-multiple-output (MIMO), and beamformed transmissions.

公开(公告)号：US11038529B2

公开(公告)日：2021-06-15

申请号：US16659531

申请日：2019-10-21

Applicant: QUALCOMM Incorporated

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

IPC: H03M13/00 ,  H03M13/09 ,  H03M13/15 ,  H04L27/34 ,  H04L27/18 ,  H04L1/00 ,  H04L5/00

Abstract: In some aspects, methods and apparatus for wireless communications are configured to generate a packet for wireless communication where the packet includes a mark symbol in a preamble of the packet where the mark symbol includes a signature or stamp field in the mark to provide protocol information that indicates the protocol of the packet, such as an 802.11 EHT packet. In some other aspects, a cyclic redundancy check field in the mark symbol may be manipulated in various ways to indicate the protocol of the packet in lieu of providing the signature or stamp field.

公开(公告)号：US10999014B2

公开(公告)日：2021-05-04

申请号：US16536280

申请日：2019-08-08

Applicant: QUALCOMM Incorporated

Inventor： Bin Tian ,  Hemanth Sampath ,  Sameer Vermani ,  Lin Yang ,  Dung Ngoc Doan ,  Simone Merlin ,  Alfred Asterjadhi ,  Jialing Li Chen ,  Stephen Jay Shellhammer

IPC: H04L1/00 ,  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 station (STA) may send a HARQ transmission to another STA. The HARQ protocol may support the use of different types of feedback from the receiving STA to control the HARQ retransmission process. This disclosure provides example message formats to support HARQ transmission and HARQ feedback in a WLAN.

公开(公告)号：US20210126700A1

公开(公告)日：2021-04-29

申请号：US17101810

申请日：2020-11-23

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/08 ,  H04L5/00 ,  H04B7/06 ,  H04W84/12 ,  H04L27/26 ,  H04J11/00

Abstract: This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for managing high volumes of space-time-streams in Wi-Fi systems. An access point (AP) may transmit packets including long training field (LTF) sections using a number of space-time-streams greater than eight. Mobile stations (STAs) in the system may or may not be capable of processing this number of streams. The AP may modulate an LTF section using a matrix with dimensions smaller than the number of streams by using tone-interleaving or by performing modulation with separate matrices in time and frequency. In some other implementations, the AP may split the antennas for transmission into groups, each group transmitting either different packets in a subset of streams or a same packet in a subset of tones. In further implementations, the AP may combine multiple space-time-streams into a super stream that supports reception at different types of STAs.

公开(公告)号：US20210112507A1

公开(公告)日：2021-04-15

申请号：US17081109

申请日：2020-10-27

Applicant: QUALCOMM Incorporated

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

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

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.

公开(公告)号：US10772099B2

公开(公告)日：2020-09-08

申请号：US16276137

申请日：2019-02-14

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/00 ,  H04W72/04 ,  H04B7/06 ,  H04W72/08 ,  H04L5/00 ,  H04B7/024

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for partial bandwidth feedback based on punctured sounding. Punctured sounding is used by a transmitting device that omits portions of a channel bandwidth based on a puncturing pattern. The puncturing pattern may be based on an exclusion bandwidth zone to avoid transmissions on portions of channels that may interfere with an incumbent system transmission. The puncturing pattern may be indicated in a null data packet announcement (NDPA) to inform the receiving device that a subsequent NDP will be punctured. The receiving device may determine the feedback by measuring the portions of the NDP that are not punctured. Beamforming may be enhanced by using punctured sounding between two beamforming endpoints.

公开(公告)号：US20200076552A1

公开(公告)日：2020-03-05

申请号：US16559605

申请日：2019-09-03

Applicant: QUALCOMM Incorporated

Inventor： George Cherian ,  Alfred Asterjadhi ,  Abhishek Pramod Patil ,  Sameer Vermani ,  Bin Tian ,  Stephen Jay Shellhammer ,  Lochan Verma ,  Lin Yang ,  Jialing Li Chen

IPC: H04L5/00 ,  H04W72/04 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may transmit, to a second AP and during a first portion of a transmission opportunity (TxOP), a request to participate in a multi-user (MU) transmission. The AP may receive, from the second AP and during the first portion of the TxOP, an indication of intent to participate in the MU transmission during the second portion of the TxOP, the indication of intent including a resource request of the second AP for participation in the MU transmission. The AP may transmit, during an initial period of the second portion of the TxOP, a trigger signal to the second AP indicating a set of one or more resources for the second AP during the MU transmission. The AP may participate, in conjunction with the second AP and during the second portion of the TxOP, in the MU transmission.

公开(公告)号：US10567555B2

公开(公告)日：2020-02-18

申请号：US15342883

申请日：2016-11-03

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Sameer Vermani

IPC: H04L29/06 ,  H04L25/02 ,  H04L5/00 ,  H04L27/26 ,  H04L1/00

Abstract: A method for wireless communication is provided. The method includes receiving, at a wireless device, a packet including a first field over a first number of tones, and a second field over a second number of tones. The second number of tones is greater than the first number of tones by a number of one or more edge tones carrying data. The method further includes determining at least one of a communication mode and a channel estimation based at least in part on the one or more edge tones carrying data.