公开(公告)号：US11108442B1

公开(公告)日：2021-08-31

申请号：US16506936

申请日：2019-07-09

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/04 ,  H04B7/0452 ,  H04L25/02 ,  H04B7/0417 ,  H04B17/12 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may determine that a channel is reciprocal and perform an implicit sounding process. During the implicit sounding process, the wireless device may estimate the uplink channel by measuring a first uplink multi-user multiple input multiple output (MU-MIMO) transmission. The wireless devices may then update the uplink channel estimation based by measuring a second MU-MIMO transmission that is received after a downlink transmission from the wireless device. Based on the updated uplink channel estimation, the wireless device may send a beamformed MU-MIMO transmission to a number of other wireless devices.

公开(公告)号：US11102036B2

公开(公告)日：2021-08-24

申请号：US16806126

申请日：2020-03-02

Applicant: QUALCOMM Incorporated

Inventor： Didier Johannes Richard Van Nee ,  Geert Arnout Awater ,  Maarten Menzo Wentink ,  Albert Van Zelst ,  Bin Tian ,  Stephen Jay Shellhammer ,  Nitin Ravinder ,  Muhammed Faruk Gencel

IPC: H04L27/06 ,  H04W52/02 ,  H04L27/26

Abstract: This disclosure provides methods, devices and systems for identifying wake-up signals. Some implementations more specifically relate to PHY preamble designs for wake-up signals such as Wake-Up Radio (WUR) packets conforming to IEEE 802.11ba. In some implementations, the preamble designs can include a combination of modulation schemes, data rate indications and length indications enabling devices capable of receiving and decoding wake-up signals to identify the signals as wake-up signals (for example, WUR packets), while ensuring that devices not capable of receiving and decoding wake-up signals identify the wake-up signals as legacy packets, or otherwise not WUR packets.

公开(公告)号：US11051246B2

公开(公告)日：2021-06-29

申请号：US16275576

申请日：2019-02-14

Applicant: QUALCOMM Incorporated

Inventor： Alfred Asterjadhi ,  George Cherian ,  Bin Tian

IPC: H04W56/00 ,  H04W52/02 ,  H04W72/04 ,  H04L29/12

Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may identify receiving wireless devices for which to send a wake-up radio (WUR) frame. The AP may obtain a basic service set identifier (BSSID) for the AP that is associated with (or intends to be associated with) the receiving wireless devices, the BSSID being known by the receiving wireless devices. The AP may perform a hashing function to the BSSID to obtain a hashed BSSID. The AP may use a first portion of the hashed BSSID as a first identifier. The AP may generate the WUR frame for transmission with an address identifier field that includes either the first identifier or a second identifier. The second identifier nay be based at least in part on the first identifier. The AP may transmit the WUR frame to the receiving wireless devices.

公开(公告)号：US20210160889A1

公开(公告)日：2021-05-27

申请号：US17103558

申请日：2020-11-24

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Youhan Kim

IPC: H04W72/08 ,  H04L5/00 ,  H04L1/00

Abstract: This disclosure provides methods, devices and systems for data parsing for resource unit (RU) aggregation. A wireless communication device (such as an access point (AP) or a station (STA)) may allocate a set of resource units (RUs) for a receiving device in a basic service set (BSS). The set of RUs may be associated with multiple bandwidth segments of a bandwidth allocation and may be non-contiguous or contiguous. The wireless communication device may determine a data parsing and encoding scheme for a set of information bits. In some implementations, the encoded bits may be distributed to the set of RUs based on a distance to tone mapping value or pilot tone location or both of the aggregated set of RUs different than respective values or pilot tone locations of the RUs in the aggregated set of RUs.

公开(公告)号：US10999110B2

公开(公告)日：2021-05-04

申请号：US16011880

申请日：2018-06-19

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhou ,  Bin Tian ,  Alfred Asterjadhi ,  George Cherian

IPC: H04L5/00 ,  H04L27/26 ,  H04L1/00 ,  H04W84/12

Abstract: Techniques are described herein that illustrate a feedback system to configure various format parameters of physical layer convergence procedure protocol data units (PPDUs) transmitted across a communication link. A receiving device may determine a Doppler shift or a delay spread of a signal received from a transmitting device. The receiving device may determine one or more format parameters for a future PPDU based on the Doppler shift or the delay spread. The receiving device may transmit an indication that includes the format parameters for the future PPDU to the transmitting device. The transmitting device may modify one or more format parameters of a PPDU based on the information in the indication. In some cases, the receiving device may indicate characteristics of mid-ambles, a type of PPDU, a guard interval, high efficiency long training field size for a future PPDU.

公开(公告)号：US10917795B2

公开(公告)日：2021-02-09

申请号：US15078095

申请日：2016-03-23

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Arumugam Chendamarai Kannan ,  Bin Tian ,  Rahul Malik

IPC: H04W16/14 ,  H04L27/00 ,  H04W74/08 ,  H04L27/26

Abstract: Methods, systems, and devices are described for wireless communication at a device. A Long Term Evolution Unlicensed (LTE-U) device may transmit an enhanced preamble that may be understood by Wireless Local Area Network (WLAN) devices, in addition to conveying a characteristic that is detectable by receiving LTE-U devices. The transmitting LTE-U device may generate the enhanced preamble by generating a first training field and a second training field. The characteristic that is detectable by receiving LTE-U devices may be a phase shift between the first and second training fields. Additionally or alternatively, the characteristic may be a sequence or tone mapping of the first or second training field. In some cases, the transmitting LTE-U device may introduce a third training field to the preamble which serves as the characteristic.

公开(公告)号：US20210029553A1

公开(公告)日：2021-01-28

申请号：US17062378

申请日：2020-10-02

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Arumugam Chendamarai Kannan ,  Bin Tian ,  Rahul Malik

IPC: H04W16/14 ,  H04L27/00 ,  H04W74/08 ,  H04L27/26

Abstract: Methods, systems, and devices are described for wireless communication at a device. A Long Term Evolution Unlicensed (LTE-U) device may transmit an enhanced preamble that may be understood by Wireless Local Area Network (WLAN) devices, in addition to conveying a characteristic that is detectable by receiving LTE-U devices. The transmitting LTE-U device may generate the enhanced preamble by generating a first training field and a second training field. The characteristic that is detectable by receiving LTE-U devices may be a phase shift between the first and second training fields. Additionally or alternatively, the characteristic may be a sequence or tone mapping of the first or second training field. In some cases, the transmitting LTE-U device may introduce a third training field to the preamble which serves as the characteristic.

公开(公告)号：US10904061B2

公开(公告)日：2021-01-26

申请号：US16744543

申请日：2020-01-16

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Jialing Li Chen ,  Bin Tian

IPC: H04L27/26 ,  H04L25/03 ,  H04L5/00 ,  H03L7/091 ,  H04B7/08

Abstract: This disclosure provides methods, devices, and systems for a wireless communication device to perform signal phase rotation. In some implementations, the wireless communication device may determine a number of phase rotation parameters to be applied to a number of tones of a transmission signal. In some aspects, each of the phase rotation parameters indicates a phase rotation to be applied to each of the tones according to a carrier index range for each of the tones and a bandwidth mode for the transmission signal. In some implementations, the wireless communication device may apply the phase rotation parameters to respective ones of the tones according to the specified phase rotations and the carrier index ranges, and transmit the transmission signal from the wireless communication device according to the applied phase rotation parameters.

公开(公告)号：US10863515B2

公开(公告)日：2020-12-08

申请号：US16153664

申请日：2018-10-05

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Jialing Li Chen

IPC: H04W28/02 ,  H04W72/04 ,  H04L5/00 ,  H04L12/26 ,  H04L27/26

Abstract: A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, an apparatus is configured to determine a plurality of resource units for communication. The apparatus is configured to generate a set of pilot signals in at least one resource unit of the plurality of resource units. The apparatus is configured to transmit the generated set of pilot signals in the at least one resource unit of the plurality of resource units.

公开(公告)号：US10820291B2

公开(公告)日：2020-10-27

申请号：US16291411

申请日：2019-03-04

Applicant: QUALCOMM Incorporated

Inventor： Tao Tian ,  Lin Yang ,  Bin Tian

IPC: H04W4/00 ,  H04W56/00 ,  H04W72/04 ,  H04B7/0456 ,  H04L27/26 ,  H04B7/0452 ,  H04L5/00 ,  H04L25/02

Abstract: Aspects of the present disclosure provide techniques for phase tracking in wireless communications using frames with some portions that use relatively long symbol durations.