公开(公告)号：US20200322824A1

公开(公告)日：2020-10-08

申请号：US16903998

申请日：2020-06-17

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Tao Luo

IPC: H04W24/08 ,  H04L5/00 ,  H04B7/0413 ,  H04L27/26 ,  H04L23/00

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：US10772021B2

公开(公告)日：2020-09-08

申请号：US14957255

申请日：2015-12-02

Applicant: QUALCOMM Incorporated

Inventor： Jun Wang ,  Ozcan Ozturk ,  Madhavan Srinivasan Vajapeyam ,  Ravindra Manohar Patwardhan ,  Miguel Griot ,  Onkar Jayant Dabeer ,  Jelena Damnjanovic ,  Aleksandar Damnjanovic ,  Taesang Yoo ,  Yongbin Wei ,  Durga Prasad Malladi ,  Ajay Gupta

IPC: H04W36/16 ,  H04W74/08 ,  H04W36/00 ,  H04W36/30 ,  H04W36/36 ,  H04W36/26 ,  H04W8/22 ,  H04W84/04

Abstract: Certain aspects relate to methods and apparatus for discovering whether one or more enhanced capabilities are supported by devices (e.g., user equipment (UE), base station (BS), etc.) in a network. The enhanced capabilities may include, for example, the ability to support certain low latency procedures, enhanced component carrier (eCC) capability, and the like. The devices in the network may perform one or more handover-related procedures (e.g., cell selection/reselection, make-before-break handover, etc.) and/or other procedures (e.g., QoS negotiation, etc.) based, at least in part, on support for the one or more enhanced capabilities.

公开(公告)号：US10660032B2

公开(公告)日：2020-05-19

申请号：US15425944

申请日：2017-02-06

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Juan Montojo

IPC: H04W52/02 ,  H04W72/04

Abstract: A control channel transmission may include information for downlink transmissions, and another control channel, such as a physical micro sleep indicator channel (PMSICH), may include information for uplink transmissions that a user equipment (UE) may use to enter a power-saving micro sleep state. A base station may drop PMSICH transmissions in the event that downlink resources are constrained. A UE that receives a PMSICH transmission may determine an uplink transmission duration, and enter a micro sleep state for all or a portion of the uplink transmission duration.

公开(公告)号：US10588151B2

公开(公告)日：2020-03-10

申请号：US15969625

申请日：2018-05-02

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04B7/0456 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communication are described. A first wireless device may receive a clear to send signal based precoded based at least in part on a receive filter at a second wireless device. The first wireless device may calculate a transmit precoder based at least in part on the clear to send signal. For example, the first wireless device may calculate a whitening filter and a second filter based at least in part on the clear to send signal. The first wireless device may transmit a request to send signal precoded by the transmit precoder to initiate communications with a third wireless device without significantly interfering with ongoing communications at the second wireless device.

公开(公告)号：US10574565B2

公开(公告)日：2020-02-25

申请号：US15659604

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: H04L12/28 ,  H04L12/761 ,  H03M13/09 ,  H04L12/18 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12 ,  H04L5/00 ,  H04B7/216 ,  H04W52/14 ,  H04W52/16 ,  H04W52/24 ,  H04W52/38 ,  H04W52/42 ,  H04W52/50 ,  H04W52/56 ,  H04L12/24 ,  H04W76/22 ,  H04W24/08 ,  H04W24/02 ,  H04W76/19 ,  H04W24/04 ,  H04W48/08 ,  H04W92/20

Abstract: Various aspects of the disclosure relate to event triggers for independent links. For example, an event trigger may be based on measurements from 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, an event trigger may be based on aggregated measurements from multiple links.

公开(公告)号：US10574276B2

公开(公告)日：2020-02-25

申请号：US14470822

申请日：2014-08-27

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Roberto Rimini ,  Richard Neil Braithwaite ,  Jibing Wang

IPC: H04W52/18 ,  H04W52/00 ,  H04W52/16 ,  H04B1/04 ,  H04K3/00 ,  H04B1/10 ,  H04B1/525

Abstract: A method for wireless communication by a wireless communication device is described. The wireless communication device determines that an aggressor radio in the wireless communication device is causing (or can potentially cause) self-jamming to a victim radio in the wireless communication device. A precoding configuration is selected based on one or more link throughput metrics and one or more self-jamming metrics. The precoding configuration is applied to transmissions of the aggressor radio.

公开(公告)号：US10484212B2

公开(公告)日：2019-11-19

申请号：US16041436

申请日：2018-07-20

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Dinkar Vasudevan ,  Seyedkianoush Hosseini ,  Jing Sun ,  Xiaoxia Zhang ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04L12/28 ,  H04L25/03 ,  H04B17/14 ,  H04L27/34 ,  H04L12/703 ,  H04B7/024 ,  H04L25/02 ,  H04B17/11 ,  H04B17/30 ,  H04B17/309

Abstract: Wireless communications systems and methods related to over-the-air uplink-downlink (UL-DL) reciprocity calibration. A central unit transmits downlink (DL) calibration reference signal (RS) and a calibration request. The central unit receives, in response to the calibration request, a first uplink (UL) calibration RS and a first DL channel estimate associated with a first transmission point (TP) and a first wireless communication device. The central unit transmits a DL coordinated multipoint (CoMP) joint transmission signal according to an uplink-downlink (UL-DL) reciprocity calibration. The UL-DL reciprocity calibration is based on at least a first UL channel estimate based on the first UL calibration RS, the first DL channel estimate, a second UL channel estimate associated with a second TP and the first wireless communication device, and a second DL channel estimate associated with the second TP and the first wireless communication device.

公开(公告)号：US20190305834A1

公开(公告)日：2019-10-03

申请号：US16447280

申请日：2019-06-20

Applicant: Qualcomm Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Taesang Yoo ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04B7/0456 ,  H04B7/022 ,  H04B7/08 ,  H04B7/00

Abstract: Reference signal and transmitter (Tx)/receiver (Rx) precoding for user equipment (UE) multiplexing in new radio (NR) shared spectrum networks is discussed. In certain reference signals, a base station may schedule multiple UEs for transmission of uplink reference signals within an identified subframe. The base station may transmit a reference signal configuration message, wherein the reference signal configuration message includes a transmission sequence identifier identifying a multiplexing for antenna ports assigned for transmission of the uplink reference signals. The multiplexing may be one or both of frequency divisional multiplexing (FDM) and time division multiplexing (TDM) over the identified subframe. Additional reference signals, transmit precoders may be identified by the base station based on channel inversion calculations of the channel matrix determined based on uplink reference signals.

公开(公告)号：US10355728B2

公开(公告)日：2019-07-16

申请号：US15991722

申请日：2018-05-29

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04B1/10 ,  H04L5/14 ,  H04L5/00 ,  H04W16/14 ,  H04W72/08

Abstract: Cross-operator, cross-link adjacent channel interference with dynamic time division duplex (TDD) is discussed. For a network environment with co-site base stations, base stations attempting to switch the default direction to downlink may monitor for uplink reservations signals transmitted between the neighboring base stations in various ways. For example, the co-site base station may only monitor for an uplink reservation signal on its own channel or may attempt to monitor for the reservation signal in its own channel and adjacent channels. The adjacent base stations may transmit reservation signals in their own channel and the adjacent channels, so that the co-site base station would monitor for the communication intention by monitoring its own channel. Further, each network operator may be assigned a specific symbol location for the reservation signals. Still other aspects provide the neighboring base stations from different operators to pool the channels and transmit according to a shared spectrum.

公开(公告)号：US10341884B2

公开(公告)日：2019-07-02

申请号：US15182273

申请日：2016-06-14

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tao Luo ,  Xiaoxia Zhang ,  Taesang Yoo ,  Siddhartha Mallik

IPC: H04W24/02 ,  H04L27/26 ,  H04W28/04 ,  H04W24/08 ,  H04W74/06 ,  H04W28/02 ,  H04W74/00 ,  H04B7/06 ,  H04W74/08 ,  H04W72/08

Abstract: Channel clearance using a shared radio frequency spectrum band may be performed for both a base station and a user equipment (UE). A base station may perform a listen before talk (LBT) procedure and verify one or more channels in a shared radio frequency spectrum band are available for transmissions and, if the LBT procedure is successful, transmit a pre-grant transmission to one or more UEs. The UEs may perform an LBT procedure for channel(s) indicated in the pre-grant transmission. If the UE LBT procedure passes, the UE may transmit a channel clearance signal, and may transmit a feedback communication responsive to the pre-grant transmission. The feedback communication may indicate, for example, the pre-grant transmission was received and which of the one or more channels are available based on the LBT procedure. The base station may receive the feedback communication and initiate transmissions to the UE.