公开(公告)号：US10396914B2

公开(公告)日：2019-08-27

申请号：US15708883

申请日：2017-09-19

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo

IPC: H04B17/309 ,  H04L1/00 ,  H04W24/08 ,  H04W24/10 ,  H04W24/02 ,  H04L5/00 ,  H04B7/06 ,  H04B17/327 ,  H04B7/00

Abstract: Techniques for performing reference signal measurement filtering in systems that support multi-beam operation are provided. A method for wireless communication by a base station (BS) includes determining at least one beam configuration for measuring reference signals transmitted from the apparatus, and signaling the beam configuration(s) to at least one user equipment (UE). A method for wireless communication by a UE includes receiving, from a BS, at least one beam configuration for measuring reference signals from the BS, and performing a measurement procedure for reference signals received from the BS based at least in part on the beam configuration(s).

公开(公告)号：US10368373B2

公开(公告)日：2019-07-30

申请号：US15656576

申请日：2017-07-21

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo

IPC: H04B7/08 ,  H04W72/04 ,  H04W16/28 ,  H04W74/08 ,  H04B7/06

Abstract: Aspects of the present disclosure relate to wireless communications and, more particularly, to beam refinement during a RACH procedure. A NB may receive a message via a first beam from a UE as part of a RACH procedure and may transmit at least one signal for beam refinement during the RACH procedure. A UE may transmit, to a NB, a message via a first beam as part of a RACH procedure and may receive, from the NB, at least one signal for beam refinement during the RACH procedure. Any directional signal beam may be used for beam refinement as described herein.

公开(公告)号：US10333672B2

公开(公告)日：2019-06-25

申请号：US15658682

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo ,  Sony Akkarakaran ,  Kaushik Chakraborty ,  Makesh Pravin John Wilson

IPC: H04L5/00 ,  H04W72/04 ,  H04W24/02

Abstract: Aspects of the present disclosure relate to wireless communications and, more particularly, to semi-persistent configuration of reference signals (RSs), such as measurement reference signals (MRSs) for beam refinement. An example method generally includes transmitting, to a user equipment (UE), a reference symbol (RS) configuration, wherein transmitting the RS configuration is independent of activating RS training for the UE, transmitting, to the UE, a message indicating an activation of RS training subsequent to transmitting the RS configuration, transmitting RSs to the UE periodically based on the RS configuration, and receiving, from the UE, measurement reports based on the transmitted RS.

公开(公告)号：US20190103928A1

公开(公告)日：2019-04-04

申请号：US16143799

申请日：2018-09-27

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo ,  Muhammad Nazmul Islam ,  Hung Dinh Ly

IPC: H04B17/309 ,  H04B7/06 ,  H04L25/02

Abstract: Methods, systems, and devices for wireless communications are described. A base station may identify resources associated with a beamformed signal, the identified resources being used by a user equipment (UE) for channel measurements of the beamformed signal, the beamformed signal being one of a plurality of beamformed signals. The base station may generate a signal indicating at least a portion of the identified resources and transmit the signal to the UE. The UE may receive the signal and perform a channel measurement of the beamformed signal using the indicated resources. The UE may transmit, to the base station, a measurement report comprising the channel measurement associated with the beamformed signal.

公开(公告)号：US20190082438A1

公开(公告)日：2019-03-14

申请号：US16128355

申请日：2018-09-11

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Xiao Feng Wang ,  Sony Akkarakaran ,  Sumeeth Nagaraja ,  Yan Zhou ,  Shengbo Chen ,  Juan Montojo ,  Wooseok Nam

IPC: H04W72/04 ,  H04L5/00 ,  H04B7/0408 ,  H04W72/08 ,  H04W56/00

Abstract: Techniques are described herein for beam pair link procedures used in dual connectivity operations. A master base station may be configured to determine a timing window for a user equipment (UE) to monitor a downlink channel associated with a secondary base station. In some cases, the master base station may determine the timing window during a dual connectivity procedure or during a carrier aggregation procedure. The UE may monitor the downlink channel during the timing window and establish a beam pair link with the secondary base station based on the monitoring.

公开(公告)号：US20180367986A1

公开(公告)日：2018-12-20

申请号：US16007771

申请日：2018-06-13

Applicant: QUALCOMM Incorporated

Inventor： Jay Kumar Sundararajan ,  Alexandros Manolakos ,  Naga Bhushan ,  Joseph Binamira Soriaga ,  Sumeeth Nagaraja

IPC: H04W8/24 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) capable of supporting multiple antenna ports may determine that some combinations of antenna ports can be used simultaneously. The UE may make this determination by evaluating the relationships between the physical antennas and the transmit chains included in the UE. Upon determining that the combinations of antenna ports can be used simultaneously, the UE may send a message to a base station. The message may indicate whether two or more antenna ports can be used at the same time. The UE may communicate simultaneously over one or more antenna ports based on the scheduling information from the base station which takes into account the ability of the combination of antenna ports to be used concurrently.

公开(公告)号：US20180343681A1

公开(公告)日：2018-11-29

申请号：US16052331

申请日：2018-08-01

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo ,  Sony Akkarakaran ,  Makesh Pravin John Wilson ,  Aitzaz Ahmad ,  Kaushik Chakraborty

IPC: H04W74/08 ,  H04B7/00 ,  H04W16/28 ,  H04W72/04

Abstract: Wireless communications systems and methods related to performing random access procedures. A base station (BS) receives, from a user equipment (UE), a plurality of random access preambles from a plurality of beam directions, wherein each of the plurality of random access preambles is received from a different beam direction, and wherein the plurality of random access preambles are associated with multiple random access opportunities of a random access attempt. The BS sends, in response to the plurality of random access preambles, a plurality of random access response (RAR) messages in the plurality of beam directions.

公开(公告)号：US20180332567A1

公开(公告)日：2018-11-15

申请号：US15973363

申请日：2018-05-07

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin JOHN WILSON ,  Xiao Feng Wang ,  Tao Luo ,  Sony Akkarakaran ,  Wooseok Nam ,  Sumeeth Nagaraja ,  Shengbo Chen ,  Kaushik Chakraborty

IPC: H04W72/04 ,  H04W24/10

Abstract: Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a UE may measure a first reference signal, associated with a frequency band of a long term evolution (LTE) system, and a second reference signal associated with a frequency band of a new radio (NR) system. The frequency band of the NR system may overlap the frequency band of the LTE system. The UE may determine first channel state feedback, associated with the frequency band of the LTE system, and second channel state feedback, associated with the frequency band of the NR system, based at least in part on the first reference signal and the second reference signal, respectively. The UE may report the first channel state feedback or the second channel state feedback in uplink control information (UCI). Other aspects are provided.

公开(公告)号：US20180279287A1

公开(公告)日：2018-09-27

申请号：US15905897

申请日：2018-02-27

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Sony Akkarakaran ,  Xiao Feng Wang ,  Sumeeth Nagaraja

IPC: H04W72/04 ,  H04W16/28 ,  H04L5/00 ,  H04B7/06

Abstract: Certain aspects of the present disclosure provide techniques for switching control beams in multi-link systems using new radio (NR) technology multiple-input multiple-output (MIMO) techniques. A user equipment (UE) may obtain a configuration from a base station (BS) comprising at least one first pattern of beams to monitor when performing a beam recovery procedure, communicate using beamforming, with the BS, via an active transmit and receive beam pair, determine a beam failure of the active transmit and receive beam pair, and monitor the beams according to the first pattern in response to the beam failure.

公开(公告)号：US20180278467A1

公开(公告)日：2018-09-27

申请号：US15887656

申请日：2018-02-02

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Sony Akkarakaran ,  Xiao feng Wang ,  Sumeeth Nagaraja

IPC: H04L12/24 ,  H04W72/04 ,  H04W24/10

Abstract: Methods, systems, and devices for wireless communication are described that support beam failure identification and recovery is systems that may use beamforming for uplink and downlink transmission beams. A first beam and a second beam may be configured, and the second beam may be used to identify a failure of the first beam. Upon detection of a beam failure, a beam recovery procedure may be initiated in which an indication of a beam failure may be transmitted using scheduling request (SR) or uplink control channel resource. A base station in some examples may transmit an indication that one of a set of beams may have failed, and a UE may provide an indication of which beam of the set of beams failed, such as based on a received reference signal associated with one of the beams.