公开(公告)号：US11432329B2

公开(公告)日：2022-08-30

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 ,  H04B7/06 ,  H04W16/28 ,  H04W72/04 ,  H04B7/00

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：US11343843B2

公开(公告)日：2022-05-24

申请号：US16837756

申请日：2020-04-01

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/14 ,  H04L5/00 ,  H04W72/12 ,  H04W72/04

Abstract: A method of wireless communication includes receiving, at a user equipment (UE), a grant from a base station on a control channel, the grant including content indicating a mini-slot assigned to the UE. The method may include interpreting the grant based on a current configuration of a data channel to determine the mini-slot. The method may include communicating with the base station during the mini-slot indicated by the grant.

公开(公告)号：US11310009B2

公开(公告)日：2022-04-19

申请号：US15970816

申请日：2018-05-03

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo ,  Sony Akkarakaran ,  Alexandros Manolakos

IPC: H04L5/00 ,  H04W36/00

Abstract: Various aspects of the disclosure relate to techniques associated with the acquisition of reference signals. In some aspects, a network may request a user equipment (UE) to measure a timing difference between neighbor cells and use that information to generate a CSI-RS configuration. The network sends the CSI-RS configuration to the UE to enable the UE to acquire a CSI-RS from a neighbor cell. In some aspects, a network may send timing-related information to a neighbor cell and the neighbor cell uses that information to transmit a CSI-RS.

公开(公告)号：US11290228B2

公开(公告)日：2022-03-29

申请号：US16450804

申请日：2019-06-24

Applicant: QUALCOMM Incorporated

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

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

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：US11272434B2

公开(公告)日：2022-03-08

申请号：US16546012

申请日：2019-08-20

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhou ,  Sumeeth Nagaraja ,  Tao Luo

IPC: H04W48/16 ,  H04W36/00 ,  H04J11/00 ,  H04W72/04

Abstract: Methods and apparatuses are provided which may be implemented in a base station, user equipment, and/or the like, to share information supportive of narrow beam transmissions. For example, a base station may be configured to access a neighbor cell list corresponding to a coverage area, determine a subset of the neighbor cell list corresponding to a first narrow beam to be transmitted, and transmit a message indicative of the subset of the neighbor cell list. In another example, a user equipment may be configured to receive a message indicative of a subset of a neighbor cell list for a portion of a coverage area of a base station corresponding to a first narrow beam, and search for one or more wireless signals based, at least in part, on the subset of the neighbor cell list.

公开(公告)号：US11252756B2

公开(公告)日：2022-02-15

申请号：US16654987

申请日：2019-10-16

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Tao Luo ,  Sumeeth Nagaraja

IPC: H04W74/08 ,  H04W52/04 ,  H04W74/00 ,  H04W72/12 ,  H04B7/08 ,  H04W52/50 ,  H04W52/32 ,  H04W52/24 ,  H04B7/06 ,  H04W52/14 ,  H04W52/48

Abstract: Methods, systems, and devices for wireless communication are described for selecting different uplink transmission parameters for transmission or retransmission of a random access message. A user equipment (UE) may transmit or retransmit a random access message such as a layer 2 or layer 3 (L2/L3) message to a base station during a random access procedure. The UE may select a transmission beam, uplink resource or transmission power for the transmission of the L2/L3 message that differ from those used for transmission of a previous random access message. The selection may be based on path loss associated with synchronization signals or previous transmissions. The selection may also be based on a maximum number of retransmissions.

公开(公告)号：US11184848B2

公开(公告)日：2021-11-23

申请号：US16032742

申请日：2018-07-11

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Sumeeth Nagaraja ,  Jianghong Luo ,  Sundar Subramanian ,  Ashwin Sampath

IPC: H04W52/02 ,  H04B7/06 ,  H04B7/08 ,  H04W76/28 ,  H04L5/00 ,  H04W16/28 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify that data is available to be transmitted to a user equipment (UE) that is operating in a discontinuous reception (DRX) mode. The base station may configure a plurality of UE-specific reference signals for transmission to the UE, each UE-specific reference signal indicating a UE identifier and an availability of data for the UE. The UE may receive the UE-specific reference signal, and identify that data is available for the UE from the base station. The UE may then transmit a beam recovery signal to the base station that includes an identifier for the transmit beam used by the UE to transmit the beam recovery signal. The base station may transmit, using a beam sweeping configuration, the plurality of UE-specific reference signals.

公开(公告)号：US11184080B2

公开(公告)日：2021-11-23

申请号：US16125140

申请日：2018-09-07

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo

IPC: H04B7/08 ,  H04W36/30 ,  H04B7/06 ,  H04B17/309 ,  H04W36/00 ,  H04L1/00 ,  H04W56/00 ,  H04W72/08 ,  H04W16/28 ,  H04W72/04

Abstract: Certain aspects of the present disclosure provide to techniques for radio link monitoring (RLM), detecting beam failure, and beam failure recovery (BFR) using radio link monitoring reference signal (RML-RS) resources and beam failure recovery reference signal (BFR-RS) resources. An exemplary method by a user equipment (UE) may include obtaining a first configuration indicating one or more radio link monitoring reference signal (RLM-RS) resources and one or more beam failure recovery reference signal (BFR-RS) resources, wherein each RLM-RS resource corresponds to at least a first link, and each BFR-RS resource corresponds to at least a second link, obtaining a first indication that a first link quality for the first link is below a first threshold and a second link quality for the second link is above a second threshold, and taking action regarding a radio link failure (RLF) based on the indication.

公开(公告)号：US11147120B2

公开(公告)日：2021-10-12

申请号：US16725791

申请日：2019-12-23

Applicant: QUALCOMM INCORPORATED

Inventor： Jianghong Luo ,  Muhammad Nazmul Islam ,  Sumeeth Nagaraja ,  Ashwin Sampath ,  Sundar Subramanian

IPC: G08C17/00 ,  H04W76/28 ,  H04W72/04 ,  H04W72/14 ,  H04W56/00 ,  H04W52/02 ,  H04B7/08 ,  H04B7/06 ,  H04W16/28

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit, to a user equipment (UE) operating in a discontinuous reception mode, a wakeup signal indicating whether data is available to be transmitted to the UE, the wakeup signal transmitted using a first set of transmit beams, which may be selected from a periodic beam management procedure, in accordance with a beam sweeping configuration. The base station may receive, from the UE and based at least in part on the wakeup signal, a response signal. The base station may perform, based at least in part on the response signal, further beam update procedures to identify a second set of transmit beams for future transmissions of the wakeup signal and/or for transmission of physical downlink control channel (PDCCH) to the UE.

公开(公告)号：US11088769B2

公开(公告)日：2021-08-10

申请号：US16019214

申请日：2018-06-26

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Tao Luo ,  Wooseok Nam

IPC: H04W72/04 ,  H04B17/24 ,  H04L1/20 ,  H04L5/00 ,  H04W56/00 ,  H04B17/318 ,  H04W24/08 ,  H04W24/10 ,  H04W76/28

Abstract: Methods, systems, and devices for wireless communication are described. In some wireless communications systems, a user equipment (UE) may support techniques for monitoring the quality of a radio link with a base station (e.g., radio link monitoring (RLM)). If the UE determines that the quality of the radio link is too low, the UE may declare that there is a radio link failure (RLF), and the UE may take action to reconnect with the base station or connect with a different base station. As described herein, the UE may monitor the quality of the radio link by monitoring the quality of multiple reference signals of different types received from the base station. In one example, the UE may be configured by the base station to use one or more specific reference signals for performing RLM based on the quality of different types of reference signals received by the UE.