公开(公告)号：US20190141723A1

公开(公告)日：2019-05-09

申请号：US16155515

申请日：2018-10-09

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Tamer Kadous ,  Yongbin Wei ,  Zhifei Fan ,  Jing Sun ,  Aleksandar Damnjanovic ,  Bin Tian

IPC: H04W72/12 ,  H04W72/04 ,  H04W16/14

Abstract: Wireless communications systems and methods related to signaling medium reservation information medium sharing among multiple radio technologies (RATs) are provided. A wireless communication device of a first RAT detects a channel reservation signal of a second RAT in a spectrum shared by the first RAT and the second RAT. The wireless communication device determines whether the channel reservation signal indicates a first transmission opportunity (TXOP) duration or a second TXOP duration that is different from the first TXOP duration. The wireless communication device selects, based on the determination, at least one of performing a backoff or continuing to monitor the spectrum.

公开(公告)号：US20190116068A1

公开(公告)日：2019-04-18

申请号：US16136572

申请日：2018-09-20

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 ,  H04L5/00 ,  H04W72/04

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：US20190082385A1

公开(公告)日：2019-03-14

申请号：US16111047

申请日：2018-08-23

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Lochan Verma

IPC: H04W52/02 ,  H04L27/26 ,  H04L12/825

Abstract: This disclosure provides systems, methods and apparatuses for indicating a data rate of a packet. The transmitting device may select the data rate of a data field of the packet to be transmitted to the receiving device, and may select a pattern to embed within a preamble of the packet based on the selected data rate. In some implementations, the transmitting device may select a first structure including a first number of instances of a sequence or its logical complement if the selected data rate is a low data rate, and may select a second structure including a second number of instances of the sequence or its logical complement if the selected data rate is a high data rate.

公开(公告)号：US10200115B2

公开(公告)日：2019-02-05

申请号：US15826292

申请日：2017-11-29

Applicant: QUALCOMM Incorporated

Inventor： Simone Merlin ,  Gwendolyn Denise Barriac ,  Hemanth Sampath ,  Sameer Vermani ,  Bin Tian ,  Yan Zhou ,  Rahul Tandra

IPC: H04B7/26 ,  H04J1/02 ,  H04L5/00 ,  H04W52/02 ,  H04J1/14 ,  H04L1/18 ,  H04L1/16 ,  H04W74/02 ,  H04W74/08 ,  H04L1/00 ,  H04W74/00

Abstract: Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes exchanging, at an access point, at least one frame reserving a wireless medium with at least one of a first and second wireless device. The method further includes receiving a first communication on a first set of wireless frequencies from the first wireless device. The method further includes receiving a second communication, at least partially concurrent with the first communication, on a second set of wireless frequencies from the second wireless device. The method further includes transmitting at least one acknowledgment of the first and second communication. The first set and the second set are mutually exclusive subsets of a set of wireless frequencies available for use by both the first and second wireless device.

公开(公告)号：US10187314B2

公开(公告)日：2019-01-22

申请号：US15159505

申请日：2016-05-19

Applicant: QUALCOMM Incorporated

Inventor： Arjun Bharadwaj ,  Bin Tian

IPC: H04Q7/00 ,  H04L12/841 ,  H04L1/18 ,  H04L1/00 ,  H04L5/00 ,  H04L27/26 ,  H04W84/12

Abstract: Various aspects are provided related to techniques for signal extension (SE) signaling. A signal extension (SE) duration for a data unit can be identified from a set of at least three possible SE durations. A single signaling bit in the data unit can be used to indicate the identified SE duration from the set of at least three possible SE durations to a receiver of the data unit. The data unit can be output for transmission to the receiver.

公开(公告)号：US10148326B2

公开(公告)日：2018-12-04

申请号：US15194348

申请日：2016-06-27

Applicant: QUALCOMM Incorporated

Inventor： Arjun Bharadwaj ,  Bin Tian

IPC: H04B7/04 ,  H04W52/02 ,  H03M13/00 ,  H04B7/0452 ,  H04L5/00 ,  H04L1/00

Abstract: Methods and apparatus for single and multi-user signal extensions or padding are provided. In various aspects, a number of symbols required to transmit a plurality of data bits to each of a plurality of wireless communication devices and a fraction of useful bits in a final symbol of each of the plurality of data bits is determined. A signaling extension length may also be determined based at least in part on the fraction of useful bits and a modulation and coding scheme (MCS) of each of the plurality of wireless communication devices. A plurality of data packets for each of the plurality of wireless communication devices are generated, with each data packet comprising the corresponding data bits and the signaling extension after the final symbol of each of the plurality of data packets.

公开(公告)号：US20180234135A1

公开(公告)日：2018-08-16

申请号：US15872294

申请日：2018-01-16

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian

IPC: H04B7/024 ,  H04B7/06 ,  H04B7/0452 ,  H04W72/04

CPC classification number: H04B7/024 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0643 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0044 ,  H04L5/0051 ,  H04L5/0091 ,  H04W16/28 ,  H04W72/0426 ,  H04W72/0433 ,  H04W72/046 ,  H04W84/12

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：US10050750B2

公开(公告)日：2018-08-14

申请号：US14932892

申请日：2015-11-04

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Dung Ngoc Doan ,  Sameer Vermani

IPC: H04W28/06 ,  H04W72/04 ,  H04L5/00 ,  H04L27/26

Abstract: A method of wirelessly communicating a packet can include generating, at a wireless device, a packet including a training field based on a training field tone plan. The method further includes populating training tones in the training field tone plan by duplicating tone positions from a base training field one or more times, and adding one or more additional sub-band direct current (DC) tones or edge tones. The method further includes transmitting the packet.

公开(公告)号：US20180206192A1

公开(公告)日：2018-07-19

申请号：US15860883

申请日：2018-01-03

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian

IPC: H04W52/02 ,  H04L27/26

CPC classification number: H04W52/0235 ,  H04L5/0053 ,  H04L5/0094 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2627 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/22

Abstract: Methods, systems, and devices for wireless communication are described. The method may include transmitting, at an access point (AP), a wakeup waveform comprising a first preamble portion occupying a first bandwidth, the first preamble portion comprising six (6) or more orthogonal frequency division multiplexing (OFDM) symbols, the sixth one of which is un-rotated binary phase shift keying (BPSK) modulated and transmitting a second wakeup portion of the wakeup waveform occupying a second bandwidth that is less than the first bandwidth. The method may further include receiving a preamble, the preamble occupying a first bandwidth, identifying an un-rotated BPSK modulated symbol following a first preamble portion in the received preamble, and detecting that the preamble is associated with a wakeup waveform based at least in part on the identified un-rotated BPSK modulated symbol.

公开(公告)号：US20180167249A1

公开(公告)日：2018-06-14

申请号：US15882928

申请日：2018-01-29

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian ,  Rahul Tandra ,  Dung Ngoc Doan

IPC: H04L27/26 ,  H04L25/02 ,  H04B17/309 ,  H04L1/06 ,  H04L5/00

CPC classification number: H04L27/2613 ,  H04B17/309 ,  H04L1/0625 ,  H04L1/0681 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2607 ,  H04L27/2611

Abstract: Methods, devices, and computer program products for improving training field design in packets with increased symbol durations are disclosed. In one aspect, a method of transmitting a packet on a wireless communication network is disclosed. The method includes transmitting a preamble of the packet over one or more space-time-streams, the preamble including one or more training fields configured to be used for channel estimation, the one or more training fields each comprising one or more symbols of a first symbol duration. The method further includes transmitting a payload of the packet over the one or more space-time-streams, the payload comprising one or more symbols of a second symbol duration, the second symbol duration greater than the first symbol duration.