公开(公告)号：US20210067214A1

公开(公告)日：2021-03-04

申请号：US17013507

申请日：2020-09-04

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian ,  Stephen Jay Shellhammer ,  Youhan Kim

IPC: H04B7/0456 ,  H04B7/08 ,  H04W52/32 ,  H04W52/24

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for implementing a joint transmission feature in a wireless communication system. Using the joint transmission feature, multiple access points (APs) may use an aggregated collection of antennas of multiple APs to simultaneously transmit a joint beamformed transmission to one or more stations (STAs). The techniques in this disclosure may prevent or reduce variations in relative gain adjustments by the APs that could otherwise negatively impact the joint transmission. In some implementations, a network device may determine a normalized gain adjustment value based on power parameters associated with each of the multiple APs. In some other implementations, each AP may determine the normalized gain adjustment value based on power parameters shared between the APs.

公开(公告)号：US10856244B2

公开(公告)日：2020-12-01

申请号：US16509117

申请日：2019-07-11

Applicant: QUALCOMM Incorporated

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

IPC: H04W56/00 ,  H04J3/06 ,  H04L27/26 ,  H04L5/00 ,  H04L29/06 ,  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：US10827425B2

公开(公告)日：2020-11-03

申请号：US15008404

申请日：2016-01-27

Applicant: QUALCOMM Incorporated

Inventor： Alfred Asterjadhi ,  Simone Merlin ,  Bin Tian ,  George Cherian ,  Gwendolyn Denise Barriac

IPC: H04W52/02 ,  H04L5/00 ,  H04W28/02 ,  H04W72/00

Abstract: A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, an apparatus may be configured to determining a TWT schedule. The apparatus may be configured to broadcast a message that includes the TWT schedule to a number of wireless devices. The message may include a broadcast indicator that indicates the TWT schedule is a broadcast TWT schedule. In another aspect, an apparatus may be configured to receive from a second wireless device a message that includes a TWT schedule. The message may include a broadcast indicator that indicates the TWT schedule is a broadcast TWT schedule. The apparatus may be configured to determine one or more TWTs for the apparatus based on the TWT schedule.

公开(公告)号：US10827385B2

公开(公告)日：2020-11-03

申请号：US16173481

申请日：2018-10-29

Applicant: QUALCOMM Incorporated

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

IPC: H04W28/06 ,  H04L5/00 ,  H04W84/12

Abstract: The present disclosure provides techniques for preamble puncturing in wireless local area networks (WLANs). In one implementation, an access point (AP) can identify, within a channel width, one or more bandwidth regions associated with incumbent technologies. The AP can broadcast or advertise, to a basic service set (BSS) initiated or started by the AP, a preamble puncture pattern in one or more management frames, the preamble puncture pattern being based on the bandwidth regions associated with incumbent technologies. In another implementation, an AP can identify a single user (SU) preamble puncture transmission, and can signal in a common portion of a SIG-B field of a multi-user (MU) PPDU format that a resource unit (RU) size is assigned to a same user to indicate the SU preamble puncture transmission. Although these techniques may be used in any frequency band, typical frequency bands may include, but are not limited to, a 2.4 GHz band, a 5 GHz band, and/or a 6 GHz band.

公开(公告)号：US20200344007A1

公开(公告)日：2020-10-29

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 ,  H04L1/00 ,  H04L5/00

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：US10728861B2

公开(公告)日：2020-07-28

申请号：US16154530

申请日：2018-10-08

Applicant: QUALCOMM Incorporated

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

IPC: H04W52/36 ,  H04B1/7156 ,  H04W52/16 ,  H04W72/04 ,  H04L5/00 ,  H04L25/03 ,  H04W52/26 ,  H04W52/22 ,  H04L27/26 ,  H04W52/28

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may identify a transmission mode for transmission of an input signal to be transmitted. The input signal may thus be modulated according to the identified transmission mode, and the modulated signal may then be transmitted at some power level to produce a transmitted signal having a spectral envelope. In some cases, the spectral envelope may be defined in terms of a power spectral density (PSD) of the transmitted waveform. The PSD may generally define the power of the waveform signal distributed over frequencies of the waveform. Further, the wireless device may control the modulation of the input signal, in addition to the power level of the input signal, to maintain the spectral envelope to be within a spectral mask defined for the implemented transmission mode as well as to conform to spectral flatness parameters.

公开(公告)号：US20200178299A1

公开(公告)日：2020-06-04

申请号：US16675824

申请日：2019-11-06

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian

IPC: H04W74/08

Abstract: This disclosure provides methods, devices, systems, and computer programs encoded on storage media, for clear channel assessment (CCA) for a wide bandwidth channel. For example, a wide bandwidth channel may have a bandwidth that is greater than 160 MHz bandwidth. An example wide bandwidth channel has a 320 MHz bandwidth. The CCA techniques include detection thresholds that may be used for wide bandwidth channels. In some implementations, a CCA process may be extended to include assessments of extended portions of a wide bandwidth channel (such as a tertiary 80 MHz bandwidth channel and a quaternary 80 MHz bandwidth channel). In some implementations, a CCA process may be extended to use an assessment of a secondary channel of the wide bandwidth channel that has a 160 MHz bandwidth.

公开(公告)号：US20200153491A1

公开(公告)日：2020-05-14

申请号：US16579471

申请日：2019-09-23

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/06 ,  H04L25/02 ,  H04B7/0417

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for techniques for reducing feedback information in an extremely high throughput (EHT) wireless local area network (WLAN). A receiving device (beamformee), such as a station (STA), may receive a sounding signal from a transmitting device (beamformer), such as an access point (AP), and transmit channel feedback. The receiving device may transmit the channel feedback as part of a reduced compressed beamforming feedback (CBF) operation that includes determining a first set of channel characteristics. The receiving device may select a subset of the first set of channel characteristics and determine a set of differential characteristics based on the subset. The transmitting device may then transmit the sets of characteristics as reduced CBF to the transmitting device. The transmitting device may determine a channel estimation for beamformed signaling based on the reduced CBF.

公开(公告)号：US20200052832A1

公开(公告)日：2020-02-13

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: H04L1/18 ,  H04L1/00

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：US20200045656A1

公开(公告)日：2020-02-06

申请号：US16509117

申请日：2019-07-11

Applicant: QUALCOMM Incorporated

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

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

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.