公开(公告)号：US10952103B2

公开(公告)日：2021-03-16

申请号：US16426943

申请日：2019-05-30

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Srinivas Yerramalli ,  Arumugam Chendamarai Kannan ,  Tamer Kadous ,  Taesang Yoo ,  Jing Sun ,  Kapil Bhattad

IPC: H04W28/26 ,  H04W74/08 ,  H04L5/00 ,  H04W24/08 ,  H04W8/24

Abstract: Wireless communications systems and methods related to communicating in a shared communication medium with flexible scheduling are provided. A first wireless communication device communicates, with a second wireless communication device during a reservation period, a channel reservation request for a first transmission opportunity (TXOP) in a spectrum. The first wireless communication device communicates, with the second wireless communication device during a response period in response to the channel reservation request, a channel reservation response. The first wireless communication device communicates, with a third wireless communication device during a first time period between the reservation period and the response period, a first communication signal.

公开(公告)号：US20210075691A1

公开(公告)日：2021-03-11

申请号：US16565364

申请日：2019-09-09

Applicant: QUALCOMM Incorporated

Inventor： Weiliang Zeng ,  Sanaz Barghi ,  Siddhartha Mallik ,  Taesang Yoo ,  Yisheng Xue ,  Xiaoxia Zhang

IPC: H04L12/24 ,  H04L25/02 ,  H04L12/26 ,  H04L1/00 ,  H04L27/26 ,  H04L5/00 ,  H04W72/08 ,  G06N3/04

Abstract: Methods, systems, and devices for wireless communications are described, and relate to a base station to communicating with a user equipment (UE) over a channel. A first device (for example, the base station or the UE) may use a trained neural network to estimate one or more link performance metrics associated with the channel. Predicting the link level performance may include determining one or more neural network weights associated with one or more input parameters associated with the channel to estimate the one or more link performance metrics. The first device may report feedback to the second device based on the estimated link performance metrics. Based on the feedback, the second device may adapt the link by adjusting channel parameters to improve the reliability or efficacy of later transmissions.

公开(公告)号：US10892864B2

公开(公告)日：2021-01-12

申请号：US15460079

申请日：2017-03-15

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Zhifei Fan ,  Weiliang Zeng ,  Jing Sun ,  Juan Montojo

IPC: H04L5/00 ,  H04L27/26 ,  H04L5/02 ,  H04J13/00 ,  H04B17/336

Abstract: Methods, systems, and devices for wireless communication are described. A base station may multiplex reference signal (RS) transmissions for different antenna ports over a set of resource elements using a code division multiplexing (CDM) group spreading in a time dimension and a frequency dimension. The base station may transmit the RS transmissions over the set of resource elements based at least in part on the multiplexing to a user equipment (UE). The UE may demultiplex the RS transmissions based at least in part on a CDM group and may select at least one of the time dimension or the frequency dimension over which to demultiplex the RS transmissions based on a determination or other information.

公开(公告)号：US10887941B2

公开(公告)日：2021-01-05

申请号：US15240040

申请日：2016-08-18

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Zhifei Fan ,  Jing Sun ,  Juan Montojo ,  Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang

IPC: H04W76/25 ,  H04L5/00 ,  H04W72/14 ,  H04W16/14 ,  H04W28/26 ,  H04W72/04 ,  H04W74/02

Abstract: Techniques are described for wireless communication. One method includes receiving, in a downlink portion of a transmission structure on a shared radio frequency spectrum band, an uplink grant for an uplink data portion of the transmission structure. The transmission structure includes the downlink portion, followed by and time domain multiplexed with an uplink control portion, followed by and time domain multiplexed with the uplink data portion. The method also includes retaining access to the shared radio frequency spectrum band by transmitting an unscheduled transmission during the uplink control portion of the transmission structure.

公开(公告)号：US10834603B2

公开(公告)日：2020-11-10

申请号：US16227121

申请日：2018-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Siddhartha Mallik ,  Taesang Yoo ,  Juan Montojo ,  Aleksandar Damnjanovic ,  Junyi Li

IPC: H04W72/04 ,  H04W16/14 ,  H04W74/08 ,  H04L5/00 ,  H04L5/26 ,  H04L27/26 ,  H04W56/00 ,  H04W74/00

Abstract: Wireless communications systems and methods related to reservation signal transmission and detection for spectrum sharing are provided. A first wireless communication device communicates, with a second wireless communication device, a reservation request (RRQ) signal to reserve a transmission opportunity (TXOP) in a shared spectrum, wherein the shared spectrum is shared by a plurality of network operating entities, and wherein the first wireless communication device and the second wireless communication device are associated with a first network operating entity of the plurality of network operating entities. The first wireless communication device transmits a reservation response (RRS) signal indicating an interference tolerance level of the first wireless communication device.

公开(公告)号：US10826581B1

公开(公告)日：2020-11-03

申请号：US16517217

申请日：2019-07-19

Applicant: QUALCOMM Incorporated

Inventor： Parham Noorzad ,  Siddhartha Mallik ,  Taesang Yoo

IPC: H04B7/04 ,  H04B7/0456

Abstract: A machine-learning based multiple-input, multiple-output (MIMO) demapper for a wireless device may include a classifier that selects which MIMO demapper to use for a sample for a particular tone. For example, a wireless device may receive via a plurality of antennas a plurality of signals including a plurality of tones. The wireless device may determine selection features for each tone of the plurality of tones. The wireless device may select, for each tone, by the classifier based on the selection features, a selected demapper from at least a first MIMO demapper and a second MIMO demapper. The second MIMO demapper may have a different performance characteristic than the first MIMO demapper. The wireless device may detect, for each tone, one or more streams using the selected demapper for the tone. A stream may refer to a sequence of bits.

公开(公告)号：US10764840B2

公开(公告)日：2020-09-01

申请号：US15964851

申请日：2018-04-27

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Jing Sun ,  Siddhartha Mallik ,  Xiaoxia Zhang ,  Tamer Kadous

IPC: H04W52/32 ,  H04W72/04 ,  H04W52/40

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for sounding reference signal (SRS) coordination, power control, and synchronization for distributed coordinated multipoint (CoMP) using communications systems operating according to new radio (NR) technologies. For example, a method for wireless communications by a network entity includes determining a first amount of transmission (Tx) power for transmission of signals originating from a first cluster center that is connected to the network entity, determining a second amount of Tx power for transmission of signals originating from at least a second cluster center that is connected to the network entity, and transmitting signals for one or more user equipment (UEs) served by the first cluster center and one or more UEs served by the second cluster center based on the first amount of Tx power and the second amount of Tx power.

公开(公告)号：US10708906B2

公开(公告)日：2020-07-07

申请号：US14532714

申请日：2014-11-04

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Siddhartha Mallik ,  Arumugam Chendamarai Kannan ,  Jelena Damnjanovic ,  Madhavan Srinivasan Vajapeyam ,  Jun Wang ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04L5/00 ,  H04W72/04 ,  H04L1/18 ,  H04L5/14 ,  H04L27/26 ,  H04L12/26 ,  H04W16/32 ,  H04W74/08 ,  H04J11/00

Abstract: Methods, systems, and devices are described for hierarchical communications and low latency support within a wireless communications system. An eNB and/or a UE may be configured to operate within the wireless communications system which is at least partially defined through a first layer with first layer transmissions having a first subframe type and a second layer with second layer transmissions having a second subframe type. The first subframe type may have a first round trip time (RTT) between transmission and acknowledgment of receipt of the transmission, and the second layer may have a second RTT that is less than the first RTT. Subframes of the first subframe type may be multiplexed with subframes of the second subframe type, such as through time division multiplexing. In some examples symbols of different duration may be multiplexed such that they different symbol durations coexist.

公开(公告)号：US10708796B2

公开(公告)日：2020-07-07

申请号：US15461368

申请日：2017-03-16

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Tao Luo

IPC: H04W24/08 ,  H04L5/00 ,  H04B7/0413 ,  H04L27/26 ,  H04L23/00 ,  H04L25/02 ,  H04L1/18

Abstract: A base station may determine a Doppler metric associated with a wireless channel and a user equipment (UE). The Doppler metric may be determined from received information related to Doppler effects measured by the UE or from directly measured Doppler effects associated with uplink data received from the UE. Based on the determined Doppler metric, the base station may select one or both of a reference signal (RS) density and a channel estimation technique for the wireless channel and associated UE. The base station may transmit an indication of the RS density to the UE. Downlink data bursts and uplink data bursts may include RSs and data according to the indicated RS density. Further, the base station may transmit to the UE, an indication to communicate using the selected wireless channel estimation technique.

公开(公告)号：US10609714B2

公开(公告)日：2020-03-31

申请号：US16031869

申请日：2018-07-10

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Taesang Yoo ,  Zhifei Fan

IPC: H04W72/08 ,  H04B7/0426 ,  H04B7/08 ,  H04B7/0456 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit a precoded reference signal to prevent interference with an incoming signal from a base station. The UE may determine a precoder for the reference signal based at least in part on a whitening matrix. In some examples, the UE may determine the precoder based at least in part on the whitening matrix and an effective channel between the base station and the UE. The precoded reference signal may be used by devices in other wireless communications systems to avoid interfering with a signal being received by the UE. In some examples, the UE may alternatively or additionally transmit an indication of the number of additional layers of the link between the UE and the base station that may be nulled out for a second link.