公开(公告)号：US11083013B2

公开(公告)日：2021-08-03

申请号：US16424221

申请日：2019-05-28

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Jing Sun

IPC: H04W4/00 ,  H04W74/08 ,  H04W72/04 ,  H04L1/18 ,  H04W80/02 ,  H04W76/27 ,  H04L5/00

Abstract: A method of wireless communication includes receiving, by a user equipment (UE) from a base station, downlink transmissions, and performing, by the UE, a listen before talk (LBT) procedure in an LBT occasion provisioned, by the base station, for the UE immediately prior to an uplink transmission that includes an acknowledgement of a downlink transmission. The method also includes transmitting, by the UE to the base station, the uplink transmission based on results of the LBT procedure. In another aspect, a method of wireless communication includes provisioning, by a base station for all served UEs, are LBT occasion immediately prior to an uplink transmission by the UEs. The uplink transmission includes an acknowledgement of a downlink transmission. The method additionally includes transmitting, by the base station to the UEs, downlink transmissions, and receiving, by the base station, the uplink transmission.

公开(公告)号：US11057873B2

公开(公告)日：2021-07-06

申请号：US15423232

申请日：2017-02-02

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Tao Luo ,  Xiaoxia Zhang ,  Juan Montojo ,  Aleksandar Damnjanovic ,  Marco Papaleo

IPC: H04W72/04 ,  H04L27/00 ,  H04L1/18 ,  H04L5/00 ,  H04W74/08 ,  H04W84/12

Abstract: Apparatus and methods for long term evolution (LTE) licensed-assisted access (LAA) communications at a user equipment (UE) are described herein. In an aspect, an example method includes a user equipment (UE) receiving a radio resource control (RRC) message from an eNB and searching for a discovery reference signal (DRS) associated with a secondary cell (Scell) of the eNB based at least on the information received in the RRC message. The example method further includes transmitting on the channel detected during the search.

公开(公告)号：US11044725B2

公开(公告)日：2021-06-22

申请号：US16551457

申请日：2019-08-26

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Srinivas Yerramalli ,  Wanshi Chen ,  Jing Sun ,  Hao Xu ,  Shimman Arvind Patel

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04L27/00 ,  H04L27/26 ,  H04W72/12 ,  H04W24/10 ,  H04W74/08 ,  H04L5/14 ,  H04W8/22 ,  H04W16/16 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit uplink (UL) messages in unlicensed spectrum with a reduced UL timing delay. The UL timing delay may be reduced by using a shortened transmission time interval (TTI) (e.g., a TTI that is reduced in duration relative to other TTIs in the system or in a legacy system) or by reducing the number of TTIs between a grant and the corresponding UL message. The reduced UL timing delay may decrease the likelihood that the UE will wait for a subsequent transmit opportunity (TxOp) to transmit the UL message. In some cases, the reduced UL timing delay corresponds to a reduced hybrid automatic repeat request (HARQ) processing delay. In some cases, a time difference (e.g., measured in TTIs) between a measurement reference TTI a corresponding channel state information (CSI) report may also be reduced.

公开(公告)号：US20210153172A1

公开(公告)日：2021-05-20

申请号：US16949710

申请日：2020-11-11

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Jing SUN ,  Xiaoxia ZHANG ,  Mostafa KHOSHNEVISAN

IPC: H04W72/04 ,  H04L1/18

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for one-shot hybrid automatic repeat request (HARQ) feedback for a user equipment (UE). In one aspect, a configuration of whether and in what circumstances a new data indicator (NDI) may be provided by the UE is disclosed. In another aspect, one or more rules for one-shot HARQ feedback reporting when the UE has received a semi-persistent scheduling (SPS) allocation release are disclosed.

公开(公告)号：US11006415B2

公开(公告)日：2021-05-11

申请号：US16180772

申请日：2018-11-05

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous ,  Chih-Hao Liu

IPC: H04W72/04 ,  H04W72/02 ,  H04B1/713 ,  H04W84/04 ,  H04L5/00

Abstract: A base station (BS) may communicate with a user equipment (UE) using a subset of channels. The BS may select a subset of a set of channels for use in communication with the UE. The BS may transmit, to the UE, a signal to identify the subset of channels. In some aspects, the BS may transmit, and the UE may receive, a channel list indicator identifying the subset of channels. The channel list indicator may include an integer value, which the UE may use to identify a subset of combinatorial factors. Based at least in part on the subset of combinatorial factors, the UE may identify the subset of the set of channels for use in communication with the BS. The UE may communicate with the BS using at least one of the subset of the set of channels, such as in a frequency hopping communication system and/or the like.

公开(公告)号：US20210135918A1

公开(公告)日：2021-05-06

申请号：US17082603

申请日：2020-10-28

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Srinivas Yerramalli ,  Zhifei Fan ,  Wooseok Nam ,  Sungwoo Park ,  Akula Reddy

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  H04W56/00

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may identify, for an initial slot of a periodic interval, a number of symbols included in the initial slot and a length of cyclic prefixes used for the symbols included in the initial slot based on a subcarrier spacing that is configured for wireless communication. The length of a first set of cyclic prefixes may be based on a length of a cyclic prefix calculated for an initial symbol of the initial slot at the configured subcarrier spacing. The wireless device may perform communications based on the determined number of symbols and length of cyclic prefixes included in the initial slot. Performing communications may include allocating resources based on a length of the cyclic prefixes used for the symbols included in the initial slot.

公开(公告)号：US20210100017A1

公开(公告)日：2021-04-01

申请号：US17035355

申请日：2020-09-28

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Vinay Chande ,  Tao Luo ,  Xiaoxia Zhang ,  Srinivas Yerramalli

IPC: H04W72/12 ,  H04W72/04 ,  H04W88/14 ,  H04W56/00 ,  H04W76/27 ,  H04W76/11 ,  H04W72/08 ,  H04L1/00 ,  H04B7/0456 ,  H04L5/00

Abstract: In a particular implementation, a method includes receiving, at a first base station from a second base station via a backhaul communication, a scheduling message indicating one or more beams of the second base station that are scheduled for use in upcoming transmissions. The second base station is a neighboring base station of the first base station. The method further includes transmitting, from the first base station to a user equipment (UE), the scheduling message.

公开(公告)号：US20210100006A1

公开(公告)日：2021-04-01

申请号：US17037118

申请日：2020-09-29

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Vinay Chande ,  Tao Luo ,  Xiaoxia Zhang ,  Srinivas Yerramalli

IPC: H04W72/08 ,  H04W72/04 ,  H04W72/12 ,  H04B17/318 ,  H04W56/00 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0456

Abstract: In a particular implementation, a method of wireless communication includes detecting, at a user equipment (UE) associated with a first base station, one or more interfering beams generated by a second base station. The second base station is a neighboring base station of the first base station. The method also includes transmitting, from the UE to the first base station, an interference identification message indicating the one or more interfering beams. The method further includes receiving, from the first base station, a scheduling message indicating a set of beams of the second base station that are scheduled for use in upcoming transmissions.

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：US10944455B2

公开(公告)日：2021-03-09

申请号：US16281839

申请日：2019-02-21

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Srinivas Yerramalli ,  Tao Luo ,  Sumeeth Nagaraja ,  Sony Akkarakaran

IPC: H04B7/06 ,  H04W24/10 ,  H04W72/04 ,  H04W76/38

Abstract: Methods, systems, and devices for wireless communications are described techniques provide for the identification of a sequence of beamforming parameters that are used for communications between a user equipment (UE) and a base station using a sequence of transmission beams. A UE may measure received reference signals that are transmitted in a series of downlink transmission beams from a base station, and report measurement parameters associated with the downlink transmission beams to the base station as part of a beam tracking and beam refinement procedure. The base station may provide transmission configuration indicator (TCI) states that are associated with each transmission beam. The TCI states may be recorded over a course of a periodic movement of the UE, and may be used deterministically to identify beamforming parameters for transmission and reception of a subsequent series of downlink transmission beams when the UE makes a subsequent same periodic movement.