公开(公告)号：US20250126671A1

公开(公告)日：2025-04-17

申请号：US18834198

申请日：2022-03-07

Applicant: QUALCOMM INCORPORATED

Inventor： Yangjun ZHANG ,  Kapil RAI ,  Sandip HOMCHAUDHURI ,  Lin YANG ,  Yusheng YANG ,  Alireza RAISSINIA

IPC: H04W76/20 ,  H04W74/00 ,  H04W74/0816 ,  H04W84/12

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for wireless range extension for communication in a wireless local area network (WLAN). In some aspects, a first WLAN device and a second WLAN device may exchange one or more management frames advertising support for a non-orthogonal frequency-division multiplexing (non-OFDM) data rate for communications via one or more non-2.4 GHz bands. In some aspects, the non-OFDM data rate may be a data rate of a plurality of data rates associated with an IEEE 802.11b standard, and the one or more non-2.4 GHz bands may include one or more of a 3.5 GHz band, a 5 GHz band, a 6 GHz band, a 45 GHz band, and a 60 GHz band. The first and second WLAN devices may select the non-OFDM data rate and at least one of the non-2.4 GHz bands for exchange data communications.

公开(公告)号：US20240430052A1

公开(公告)日：2024-12-26

申请号：US18740815

申请日：2024-06-12

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li CHEN ,  Lin YANG ,  Bin TIAN

IPC: H04L5/00 ,  H04L1/00 ,  H04W74/0816

Abstract: This disclosure provides methods, components, devices and systems for 480 and 640 megahertz (MHz) transmission in Wi-Fi. Some aspects more specifically relate to inclusion of a bandwidth field and a bandwidth extension field in a preamble of a physical layer protocol data unit (PPDU) that jointly indicate that the channel bandwidth of the PPDU is a contiguous 480 MHz channel bandwidth or a 640 MHz channel bandwidth. In some aspects, parameters of the PPDU may be defined based on the PPDU occupying a 480 MHz or 640 MHz bandwidth. For example, the parameters may include tone plans, allowed puncturing patterns, signaling of the puncturing plans, signaling of the resource unit allocation, a short training field, a long training field, pilot signal sequences, phase shifts, a segment parser, and/or a spectral mask.

公开(公告)号：US20240413866A1

公开(公告)日：2024-12-12

申请号：US18811529

申请日：2024-08-21

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Alfred ASTERJADHI ,  Youhan KIM

IPC: H04B7/06 ,  H04W84/12

Abstract: This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks (WLANs). Some implementations more specifically relate to BSS discovery and association techniques that support wireless communications on carrier frequencies above 7 GHz. In some aspects, an access point (AP) may communicate using beamforming on a wireless communication link operating at a carrier frequency above 7 GHZ (the “directional link”) while offloading the BSS discovery and association procedures needed to support such communications onto a wireless communication link operating at a carrier frequency below 7 GHZ (the “anchor link”). In some implementations, the AP may perform a beamforming training operation with a STA over the directional link upon associating with the STA over the anchor link. In such implementations, the AP may communicate with the STA over the directional link using a beam derived from the beamforming training operation.

公开(公告)号：US20240292419A1

公开(公告)日：2024-08-29

申请号：US18659575

申请日：2024-05-09

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Dung Ngoc DOAN

IPC: H04W72/20 ,  H04J11/00 ,  H04W72/044

CPC classification number: H04W72/20 ,  H04J11/00 ,  H04W72/046

Abstract: Methods and systems for amplitude shaping encoding and indicating boundaries in bitstreams are described. A transmitting device may insert, into a bitstream to indicate a boundary, a sequence of amplitude bits unassociated with patterns of bit values in a lookup table used for the encoding. A transmitting device may monitor a length of the amplitude bits in a bitstream during the encoding and stop the encoding on information bits at an end of a current data unit responsive to the length reaching a threshold. A transmitting device may monitor the length of the information bits and, for each data unit, determine whether a boundary is reached. Responsive to determining that a boundary is reached, the transmitting device may not include, before the boundary, amplitude bits generated based on the information bits in the data unit, and add padding bits after a last amplitude bit before the boundary.

公开(公告)号：US20240080690A1

公开(公告)日：2024-03-07

申请号：US18465804

申请日：2023-09-12

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Stephen Jay SHELLHAMMER ,  Dung Ngoc DOAN ,  Sameer VERMANI ,  Jialing Li CHEN

IPC: H04W24/08 ,  H04L27/26

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：US20240063876A1

公开(公告)日：2024-02-22

申请号：US17820006

申请日：2022-08-16

Applicant: QUALCOMM Incorporated

Inventor： Kanke WU ,  Bin TIAN ,  Tevfik YUCEK ,  Lin YANG

IPC: H04B7/06 ,  H04L5/00

CPC classification number: H04B7/0691 ,  H04L5/0098

Abstract: This disclosure provides methods, devices and systems for improving wireless communications in power spectral density (PSD)-limited frequency bands. A wireless communication device, having a number (NTX) of transmit antennas, parses a physical layer (PHY) protocol data unit (PPDU) into a number (NSS) of spatial streams and modulates the NSS spatial streams on a number (M) of subcarriers. In some implementations, the wireless communication device may transmit the PPDU using a number (N) of the transmit antennas, where NSS≤N

公开(公告)号：US20240007241A1

公开(公告)日：2024-01-04

申请号：US18323333

申请日：2023-05-24

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Qifan CHEN ,  Youhan KIM

IPC: H04L5/00 ,  H04W52/28

CPC classification number: H04L5/0041 ,  H04L5/0048 ,  H04L5/0069 ,  H04W52/286

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 LTF designs that support distributed transmissions. In some aspects, a transmitting device may obtain a sequence of values representing an LTF of a PPDU and may map the sequence of values to a number (N) of noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan. In some implementations, the transmitting device may modulate the sequence of values on N tones, representing a logical RU, and map the N tones to the N noncontiguous subcarrier indices, respectively. In some other implementations, the sequence of values may be obtained based on relative locations of the N noncontiguous subcarrier indices in the wireless channel.

公开(公告)号：US20230388986A1

公开(公告)日：2023-11-30

申请号：US17828085

申请日：2022-05-31

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Jialing Li CHEN ,  Bin TIAN ,  Youhan KIM

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04W72/0453 ,  H04L5/0044 ,  H04L5/0078 ,  H04L27/2602

Abstract: This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks (WLANs). Some implementations more specifically relate to packet designs that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a wireless communication device may map a physical layer convergence protocol (PLCP) protocol data unit (PPDU) to orthogonal subcarriers according to existing tone plans associated with carrier frequencies below 7 GHz and may up-clock the PPDU for transmission on carrier frequencies above 7 GHz (such as by increasing the frequency of a clock signal used to convert the PPDU between the frequency domain and the time domain). In some implementations, the PPDU may conform to an existing PPDU format designed for sub-7 GHz wireless communications. In some other implementations, the PPDU may conform to a “green field” PPDU format optimized for wireless communications on carrier frequencies above 7 GHz.

公开(公告)号：US20230069075A1

公开(公告)日：2023-03-02

申请号：US17402475

申请日：2021-08-13

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Youhan KIM ,  Qifan CHEN

IPC: H04L5/00 ,  H04W52/18

Abstract: This disclosure provides methods, devices and systems for distributed transmission of short training fields in a power spectral density limited frequency band. In one aspect, a device receives a distributed resource unit (dRU) assignment for transmission of a dRU portion of a physical layer protocol data unit (PPDU); determines a spatial stream global cyclic shift delay (CSD) index for an short training field (STF) of the dRU portion of the PPDU; and transmits, based on the spatial stream global CSD index, the EHT of the dRU portion of the PPDU across a dRU spreading bandwidth associated with the dRU assignment using a tone plan and sequence corresponding to a regular resource unit (rRU) transmission mode.

公开(公告)号：US20220030625A1

公开(公告)日：2022-01-27

申请号：US17382242

申请日：2021-07-21

Applicant: QUALCOMM Incorporated

Inventor： Lin YANG ,  Bin TIAN ,  Youhan KIM

IPC: H04W74/08 ,  H04W24/10 ,  H04L5/00

Abstract: This disclosure provides methods, devices and systems for clear channel assessment (CCA). In one aspect a device performs a first clear channel assessment (CCA) check on a primary subchannel of a channel having a total bandwidth greater than or equal to 40 megahertz (MHz), a plurality of subchannels of the channel collectively spanning the total bandwidth of the channel, the plurality of subchannels including the primary subchannel and one or more secondary subchannels, the primary subchannel and the one or more secondary subchannels each having a bandwidth of 20 MHz, performs, on each of the one or more secondary subchannels, a respective second CCA check, and transmits a communication on the channel based on a status of each of the primary subchannel and the one or more secondary subchannels that is based on the performance of the respective second CCA check or the first CCA check.