公开(公告)号：US11805431B2

公开(公告)日：2023-10-31

申请号：US17092702

申请日：2020-11-09

Applicant: QUALCOMM Incorporated

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

IPC: H04W24/08 ,  H04L27/26 ,  H04W84/12

CPC classification number: H04W24/08 ,  H04L27/2627 ,  H04W84/12

Abstract: This disclosure provides methods, devices and systems for link adaptation in wireless communications. Some implementations more specifically relate to transmitter-based modulation and coding scheme (MCS) selection. A transmitting device transmits a test packet, over a wireless channel, to a receiving device. The receiving device generates one or more signal-to-interference-plus-noise ratio (SINR) estimates for the wireless channel based on the received sounding packet. In some aspects, each SINR estimate may be associated with a particular modulation order. In some other aspects, each SINR estimate may be generated based on a transmitter configuration or a receiver type to be used for subsequent communications between the transmitting device and the receiving device. The receiving device transmits feedback, including the SINR estimates, to the transmitting device. The transmitting device then selects an MCS to be used for subsequent communications with the receiving device based on the SINR estimates and associated modulation orders.

公开(公告)号：US11800467B2

公开(公告)日：2023-10-24

申请号：US17943677

申请日：2022-09-13

Applicant: QUALCOMM Incorporated

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

IPC: H04W56/00 ,  H04J3/06 ,  H04L27/26 ,  H04L5/00 ,  H04L69/28 ,  H04W88/08

CPC classification number: H04W56/001 ,  H04J3/067 ,  H04L5/0044 ,  H04L27/2602 ,  H04L27/2605 ,  H04L27/2613 ,  H04L69/28 ,  H04L27/26035 ,  H04W88/08

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：US11743837B2

公开(公告)日：2023-08-29

申请号：US17118506

申请日：2020-12-10

Applicant: QUALCOMM Incorporated

Inventor： Arjun Bharadwaj ,  Rahul Tandra ,  Bin Tian ,  Youhan Kim ,  Simone Merlin ,  George Cherian

IPC: H04W52/24 ,  H04W52/14 ,  H04L27/26 ,  H04B7/0452 ,  H04L1/00 ,  H04W52/22 ,  H04L5/00 ,  H04W52/36 ,  H04W52/26

CPC classification number: H04W52/242 ,  H04B7/0452 ,  H04L1/0009 ,  H04L5/0053 ,  H04L27/2601 ,  H04W52/143 ,  H04W52/146 ,  H04W52/228 ,  H04W52/262 ,  H04W52/265 ,  H04W52/362 ,  H04W52/367

Abstract: A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, the apparatus is configured to determine a target receiver power level for uplink transmissions received at the apparatus, to determine uplink power control information based on the determined target receiver power level for UL MU-MIMO transmission or UL OFDMA transmission, and to transmit a frame that includes the determined uplink power control information to a station scheduled by the apparatus for uplink transmission.

公开(公告)号：US11728848B2

公开(公告)日：2023-08-15

申请号：US17127890

申请日：2020-12-18

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian

IPC: H04B7/024 ,  H04L5/00 ,  H04B7/0452 ,  H04W72/044 ,  H04B7/0417 ,  H04W84/12 ,  H04W72/29 ,  H04B7/06 ,  H04W16/28 ,  H04W72/27

CPC classification number: H04B7/024 ,  H04B7/0417 ,  H04B7/0452 ,  H04L5/0035 ,  H04L5/0044 ,  H04L5/0091 ,  H04W72/046 ,  H04W72/29 ,  H04W84/12 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0643 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0051 ,  H04W16/28 ,  H04W72/27

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.

公开(公告)号：US11637723B2

公开(公告)日：2023-04-25

申请号：US17097812

申请日：2020-11-13

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Jialing Li Chen ,  Louay Jalloul ,  Vincent Knowles Jones, IV ,  Ning Zhang ,  Chi-Lin Su ,  Ahmad Abdulrahman Mohammed

IPC: H04L25/02 ,  H04L27/26 ,  H04W72/04 ,  H04L5/00 ,  H04W72/044

Abstract: Methods, systems, and devices for wireless communication are described. In some systems (e.g., Wi-Fi systems), a transmitting device such as an access point (AP) or mobile station (STA), may identify a number of spatial streams for a data transmission that is less than a number of transmit antennas, and may transmit a packet over a channel. In a first implementation, the packet may be formatted in a multi-user frame format, with a number of long training field (LTF) symbols equal to the number of transmit antennas. In a second implementation, the packet may be a null data packet (NDP), and the device may transmit a separate data packet. In a third implementation, the packet may be formatted in single-user frame format with a modified LTF. A receiving device may receive the packet, and may perform channel estimation and power amplifier (PA) distortion cancellation based on the received packet.

公开(公告)号：US20230124579A1

公开(公告)日：2023-04-20

申请号：US17503215

申请日：2021-10-15

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin Tian ,  Youhan Kim ,  Qifan Chen

IPC: H04L5/00 ,  H04L27/26

Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to short training field (STF) designs and signaling that support distributed transmissions. A transmitting device that transmits data on a distributed resource unit (dRU) may transmit an STF sequence over a spreading bandwidth of the dRU according to an existing STF tone plan. Each STA allocated a dRU for transmission in a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) maps its STF sequence to one or more spatial streams and may apply one or more global cyclic shift delays (CSDs) to the STF sequence mapped to the one or more spatial streams, respectively. As such, different global CSDs may be assigned to different STAs so that each STA transmits its STF sequence with different amounts of delay.

公开(公告)号：US20230120347A1

公开(公告)日：2023-04-20

申请号：US18052188

申请日：2022-11-02

Applicant: QUALCOMM Incorporated

Inventor： Yanjun Sun ,  Bin Tian ,  Alfred Asterjadhi ,  George Cherian ,  Youhan Kim

IPC: H04L1/00 ,  H04W76/30 ,  H04L1/1607

Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication that can be used for channel puncturing. A wireless station (STA) may receive an indication of a first puncturing pattern to be used for transmitting or receiving data over a wireless channel, where the first puncturing pattern is defined by a first wireless communication protocol release and the STA is configured to operate according to a second wireless communication protocol release. The STA may select, from a set of puncturing patterns defined by the second wireless communication protocol release, a second puncturing pattern that includes one or more non-punctured subchannels that are subsets of one or more corresponding non-punctured subchannels of the first puncturing pattern. The STA may use the second puncturing pattern to transmit or receive one or more packets over the wireless channel.

公开(公告)号：US11627027B2

公开(公告)日：2023-04-11

申请号：US17356330

申请日：2021-06-23

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Bin Tian ,  Youhan Kim ,  Cheng-Ming Chen

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

Abstract: A technique for wireless communication of a punctured null data packet with a long training field sequence is disclosed. The long training field (LTF) sequence is generated for the null data packet (NDP) for transmission over a channel having a bandwidth that is an integer multiple of 80 MHz. The LTF sequence is modulated onto a plurality of tones of the channel excluding tones within a punctured subchannel of a plurality of subchannels of the channel. The modulation may be based on a size and location of the punctured subchannel and a symbol duration associated with transmitting the LTF sequence. The NDP is transmitted including the LTF sequence to a second wireless communication device via the channel. A partial bandwidth feedback may be received in response to the LTF in the punctured NDP.

公开(公告)号：US11601239B2

公开(公告)日：2023-03-07

申请号：US17180525

申请日：2021-02-19

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian

IPC: H04L27/26 ,  H04L5/00

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for physical (PHY) layer control signaling. A first physical layer convergence protocol (PLCP) protocol data unit (PPDU) may precede a second PPDU. The first PPDU may be referred to as a PHY control PPDU and may include a physical layer control signaling field (CNT-SIG) that informs one or more stations (STAs) regarding a physical layer configuration they should use for the second PPDU. The PHY control PPDU may enable dynamic subchannel assignments for one or more identified STAs, legacy STAs, or sub-bandwidth operating devices. The techniques of this disclosure may enable sharing of a wide bandwidth wireless channel by different types of devices or different basic service sets (BSSs) assigned to different subchannels of the wireless channel.

公开(公告)号：US20230035113A1

公开(公告)日：2023-02-02

申请号：US17390850

申请日：2021-07-30

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Lin Yang ,  Yanjun Sun ,  Bin Tian

IPC: H04W72/04

Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to signaling in a trigger frame to support distributed transmissions via distributed resource units (dRUs). In some implementations, an access point (AP) may transmit a trigger frame soliciting a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a wireless station (STA), where the trigger frame carries RU allocation information identifying a distributed resource unit (dRU) allocated for the STA and carries tone mapping information indicating a selected spreading bandwidth design for the wireless channel or subchannel. The AP can support channel puncturing by selecting a particular spreading bandwidth design that controls how dRUs are mapped to non-contiguous tones spanning respective spreading bandwidths.