公开(公告)号：US10588159B2

公开(公告)日：2020-03-10

申请号：US15976301

申请日：2018-05-10

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/12 ,  H04W74/08 ,  H04B7/0456 ,  H04B7/0417 ,  H04B7/06 ,  H04W72/10

Abstract: Consideration of contention windows with spatial listen before talk (LBT) operations is discussed. In multiple input, multiple output (MIMO) transmission operations over a shared transmission medium, use of spatial LBT transmissions may be implemented with fairness options and parameters influenced by a condition of the MIMO transmitter, such conditions as the level of MIMO capability or the enablement of polite spatial LBT nulling transmissions. When a MIMO transmitter identifies data for transmission, it may determine a configuration of the medium access contention operation, synchronous or asynchronous content, based on the condition of the MIMO transmitter. The MIMO transmitter may then transmit the data either using spatial LBT transmission or not according to the configuration of the medium access contention operation.

公开(公告)号：US10581722B2

公开(公告)日：2020-03-03

申请号：US15659584

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Juan Montojo ,  Tamer Kadous ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04B7/06 ,  H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H03M13/09 ,  H04B17/24 ,  H04B7/216 ,  H04L12/18 ,  H04L12/24 ,  H04W24/02 ,  H04W24/04 ,  H04W24/08 ,  H04W48/08 ,  H04W52/14 ,  H04W52/16 ,  H04W52/24 ,  H04W52/34 ,  H04W52/38 ,  H04W52/42 ,  H04W52/50 ,  H04L12/761 ,  H04W52/54 ,  H04B17/318 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12 ,  H04W52/56 ,  H04W76/22 ,  H04W76/19 ,  H04W92/20

Abstract: Various aspects of the disclosure relate to power control for independent links. For example, power control at a device may be based on transmissions on multiple links. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). For example, the first device may communicate with a second device (e.g., a TRP) via a first link and communicate with a third device (e.g., a TRP) via a second link. In some scenarios, power control for the first device may be based on power control commands received on multiple links. In some scenarios, a power control constraint may be met taking into account the transmission power on multiple links.

公开(公告)号：US20200008108A1

公开(公告)日：2020-01-02

申请号：US16569193

申请日：2019-09-12

Applicant: QUALCOMM Incorporated

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

IPC: H04W28/26 ,  H04W16/14 ,  H04W52/34 ,  H04W72/04 ,  H04W72/10

Abstract: Methods and apparatuses for wireless communications are described. The aspects relate to a frame structure for new radio shared spectrum. For instance, the frame structure may provide shared medium access by multiple operators in a new radio shared spectrum system. Specifically, the present aspects provide for utilizing reservation preambles associated with a distinct operator for announcing to other operators a reservation of at least one transmission opportunity of a given frame in the new radio shared spectrum.

公开(公告)号：US20190393931A1

公开(公告)日：2019-12-26

申请号：US16449246

申请日：2019-06-21

Applicant: QUALCOMM Incorporated

Inventor： Yi Huang ,  Gokul Sridharan ,  Wei Yang ,  Taesang Yoo ,  Peter Gaal

IPC: H04B7/0456 ,  H04W52/08 ,  H04B7/0491 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) having partially coherent antennas may be configured for simultaneous transmissions on groups of antennas (e.g., multiple pairs of antennas). To achieve the benefits of simultaneous transmissions using groups of antenna that are partially coherent, without having the transmissions affect each other (e.g., interference), the UE may apply a hybrid closed-loop multiple-input multiple-output (MIMO) scheme among each antenna in the antenna groups where phase coherence can be maintained. Following the hybrid closed-loop MIMO scheme, the UE may apply a transparent diversity scheme across each antenna of the groups. Alternatively, the UE may first apply the transparent diversity scheme and next apply the hybrid closed-loop MIMO scheme. By applying a hybrid closed-loop MIMO scheme, as well as a transparent diversity scheme, the UE may fully realize its resources and contribute to an improved spatial diversity for a MIMO system.

公开(公告)号：US10477592B2

公开(公告)日：2019-11-12

申请号：US15813811

申请日：2017-11-15

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Tao Luo ,  Taesang Yoo ,  Juan Montojo ,  Zhifei Fan

IPC: H04W74/08 ,  H04L5/00 ,  H04W72/04 ,  H04L27/00 ,  H04W88/02

Abstract: Systems and methods herein determine whether an uplink RACH request and/or an uplink autonomous message will be sent using Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), or another waveform. The determinations may be based on carrier frequencies, path loss measurements, preconfigurations, and/or more. Further, the systems and methods may send the uplink using time and/or frequency resources that correspond to the DFT-S-OFMD waveform, CP-OFDM waveform, or other waveform. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US10476781B2

公开(公告)日：2019-11-12

申请号：US15659592

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Juan Montojo ,  Tamer Kadous ,  Junyi Li ,  Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04L12/761 ,  H04L12/18 ,  H03M13/09 ,  H04B17/318 ,  H04B17/24 ,  H04W52/54 ,  H04W52/34 ,  H04W52/24 ,  H04B7/06 ,  H04W72/12 ,  H04W76/22 ,  H04L12/24 ,  H04W72/04 ,  H04W52/56 ,  H04W52/14 ,  H04W52/16 ,  H04W52/38 ,  H04W52/42 ,  H04W52/50 ,  H04B7/216 ,  H04L5/00 ,  H04W72/08 ,  H04W24/08 ,  H04W24/02 ,  H04W76/19 ,  H04W24/04 ,  H04W48/08 ,  H04W92/20 ,  H04L1/18 ,  H04L1/00

Abstract: Various aspects of the disclosure relate to feedback for independent links. For example, channel state feedback may be based on the channel state of multiple links. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). In some scenarios, channel state information (CSI) feedback may take into account the CSI-reference signals (CSI-RSs) from multiple links. For example, CSI feedback may be based on CSI-RSs from multiple links if the antenna sub-arrays for the links are close to one another. As another example, a decision as to whether CSI feedback is to be based on CSI-RSs from multiple links may depend on channel conditions.

公开(公告)号：US10470242B2

公开(公告)日：2019-11-05

申请号：US15637457

申请日：2017-06-29

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Juan Montojo ,  Taesang Yoo ,  Zhifei Fan

IPC: H04W84/18 ,  H04W76/10 ,  H04M11/06 ,  H04W4/18 ,  H04W8/00 ,  H04B7/024 ,  H04W56/00 ,  H04L5/00

Abstract: Phase compensation in a new radio (NR) shared spectrum (NR-SS) coordinated multipoint (CoMP) environment is discussed. A base station may synchronize the phase between one or more additional base stations in a coordinated multipoint (CoMP) group serving one or more user equipments (UEs). This first synchronizing is performed prior to a current transmission opportunity between the CoMP group and the UEs. During transmission, a UE will sent a phase compensation reference signal (PCRS) to help with adjusting a phase drift that exceeds a predetermined threshold. The PCRS may be triggered by a signal from the base station or may be sent routinely by the UE. The UEs will transmit PCRS after each subframe, which the base stations use to adjust the phase.

公开(公告)号：US10448351B2

公开(公告)日：2019-10-15

申请号：US14227279

申请日：2014-03-27

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Wanshi Chen ,  Hao Xu ,  Yongbin Wei ,  Peter Gaal ,  Durga Prasad Malladi

IPC: H04W56/00 ,  H04W72/12 ,  H04W72/04

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for employing a neighboring cell's assistance information for interference mitigation (e.g., by conveying the information to a user equipment). A base station (BS) may determine assistance information for a neighboring cell and convey it to a user equipment (UE). A UE may receive assistance information for a neighboring cell and use that information for performing interference cancellation or suppression on received signals. The UE may receive the assistance information from a serving cell or a non-serving cell. The assistance information may be valid for a particular transmission instance, for a known period of time, or until updated by a BS.

公开(公告)号：US10433180B2

公开(公告)日：2019-10-01

申请号：US15829094

申请日：2017-12-01

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Taesang Yoo ,  Seyed Ali Akbar Fakoorian ,  Jing Lei

IPC: H04W16/14 ,  H04W72/10 ,  H04W72/12 ,  H04W74/08 ,  H04W74/02

Abstract: Wireless communications systems and methods related to dynamic medium sharing are provided. A first wireless communication device communicates with a second wireless communication device, a reservation request (RRQ) for a transmission opportunity (TXOP) in a shared spectrum. The shared spectrum is shared by a plurality of network operating entities. 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 RRQ indicates a first traffic priority of data to be communicated. The first wireless communication device communicates with the second wireless communication device, the data of the first traffic priority during the TXOP.

公开(公告)号：US20190268778A1

公开(公告)日：2019-08-29

申请号：US16411428

申请日：2019-05-14

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Jelena Damnjanovic ,  Aleksandar Damnjanovic ,  Tao Luo ,  Jing Sun ,  Taesang Yoo ,  Yongbin Wei

IPC: H04W16/14 ,  H04W74/00 ,  H04W74/08 ,  H04L1/18 ,  H04L1/00 ,  H04W76/28

Abstract: Methods, systems, and devices for wireless communication are described. Discontinuous reception (DRX) operation may be configured differently on enhanced component carriers (eCCs) than on other component carriers, including a primary cell (PCell). In some cases, a user equipment (UE) may be configured with several different eCC DRX modes. An eCC DRX configuration may, for example, be coordinated with downlink (DL) transmission time interval (TTI) scheduling so each DRX ON duration may correspond to a DL burst duration of the corresponding eCC. The eCC DRX ON durations may also be scheduled according to hybrid automatic repeat request (HARQ) process scheduling. In some examples, eCC DRX ON durations may be based on listen-before-talk (LBT) procedures. In some cases, eCC DRX ON durations may be configured to contain an uplink (UL) burst to enable channel state information (CSI) reporting. The eCC DRX may also be configured to minimize interruption of the PCell.