公开(公告)号：US10893523B2

公开(公告)日：2021-01-12

申请号：US15635000

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous ,  Chih-Hao Liu ,  Chirag Patel ,  Alberto Rico Alvarino

IPC: H04W72/04 ,  H04W74/08 ,  H04W4/70 ,  H04W28/26 ,  H04W16/14 ,  H04W88/02 ,  H04W88/08 ,  H04L1/12 ,  H04B1/713 ,  H04L1/18 ,  H04L29/08 ,  H04L5/00 ,  H04L5/14

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus may perform a dual CCA procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful. The apparatus may transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful and may refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful. In performing the dual CCA procedure, the apparatus may perform CCA for a first period of time then perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

公开(公告)号：US10856185B2

公开(公告)日：2020-12-01

申请号：US15663461

申请日：2017-07-28

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Taesang Yoo ,  Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W28/00 ,  H04W28/26 ,  H04W72/04 ,  H04W74/08 ,  H04W16/14 ,  H04W72/08 ,  H04W72/10 ,  H04W74/00

Abstract: Channel reservation systems and methods are disclosed herein, which schedule transmissions on a shared radio medium that is shared by a plurality of licensed network operators. In embodiments, priority access is pre-assigned to the network and the method determines whether to send a transmission based at least on the transmitter's priority class as compared to another transmitter's priority class and to which transmitter the time slot of a signal is dedicated. In embodiments, priority access may not be preassigned to the network and pre-grants may be used in conjunction with CR-Ts and CR-Rs to determine whether a transmitter transmits.

公开(公告)号：US10798602B2

公开(公告)日：2020-10-06

申请号：US16046868

申请日：2018-07-26

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/00 ,  H04W24/10 ,  H04B1/713 ,  H04W72/04 ,  H04W36/00 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for cell measurement associated with a frequency hopping system. The base station may then receive a measurement report based on the configuration. A user equipment (UE) may receive a configuration for cell measurement associated with a frequency hopping system. The UE may generate a measurement report based on the configuration. The UE may then transmit the measurement report to a serving base station.

公开(公告)号：US10785797B2

公开(公告)日：2020-09-22

申请号：US15997533

申请日：2018-06-04

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tao Luo ,  Tamer Kadous

IPC: H04W74/08 ,  H04L5/00 ,  H04W16/14 ,  H04W72/12 ,  H04W72/14

Abstract: Certain aspects of the present disclosure provide techniques for beam refinement reference signal (BRRS) design for millimeter wave (mmWave) system in shared spectrum. The techniques can include a method for wireless communication that includes transmitting at least one of a request-to-send (RTS) or a clear-to-send (CTS) within a frame using frequency resources in a shared spectrum, and including a beam refinement reference signal (BRRS) in the at least one of the RTS or CTS.

公开(公告)号：US10772113B2

公开(公告)日：2020-09-08

申请号：US15887277

申请日：2018-02-02

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Ahmed Kamel Sadek ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04 ,  H04L27/26 ,  H04L1/00 ,  H04L1/18 ,  H04W74/00 ,  H04L1/16 ,  H04L5/00 ,  H04W28/06 ,  H04W74/08

Abstract: Techniques for autonomous uplink (AUL) transmissions are provided that allow for efficient use of shared radio frequency spectrum band resources. A user equipment (UE) may determine a duration of an AUL transmission and modify an uplink waveform or provide an indication to a base station of one or more channel resources that may be available for base station transmissions, in order to more fully utilize shared radio frequency spectrum band resources within a maximum channel occupancy time (MCOT). A base station may activate or deactivate AUL transmissions through downlink control information (DCI) transmitted to the UE. A UE and base station may exchange various other control information to provide relatively efficient autonomous uplink transmissions and use of the shared radio frequency spectrum band resources.

公开(公告)号：US10700907B2

公开(公告)日：2020-06-30

申请号：US16012095

申请日：2018-06-19

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiao Feng Wang ,  Tao Luo ,  Tamer Kadous

IPC: H04J11/00 ,  H04L27/26 ,  H04L5/00 ,  H04W72/04

Abstract: Certain aspects of the present disclosure relate to communication systems, and more particularly, to single-carrier waveform generation for transmission. An exemplary method generally includes concatenating a first sequence of data samples with samples of a known sequence to generate a first series of samples, performing a discrete Fourier transform (DFT) on the first series of samples to generate a first series of frequency-domain samples, mapping the first series of frequency-domain samples and first zero values to first tones of a system bandwidth, performing an inverse discrete Fourier transform (IDFT) on the mapped first series of frequency-domain samples and the mapped first zero values to generate first time-domain samples of a first orthogonal frequency domain multiplexing (OFDM) symbol, and transmitting the first OFDM symbol as a single-carrier waveform in a first period.

公开(公告)号：US20200100116A1

公开(公告)日：2020-03-26

申请号：US16581579

申请日：2019-09-24

Applicant: QUALCOMM Incorporated

Inventor： Kaushik Chakraborty ,  Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W16/14 ,  H04W74/08 ,  H04W72/14 ,  H04W24/04

Abstract: Wireless communications systems and methods related to communications in a network that supports data transmitted in an unlicensed frequency band and a licensed frequency band are provided. A first wireless communication device communicates, with a second wireless communication device, a configuration indicating a first resource in an unlicensed frequency band and a second resource in a licensed band. The first wireless communication device communicates, with the second wireless communication device in the unlicensed frequency band, a first communication signal based on the configuration. The first wireless communication device communicates with the second wireless communication device in the licensed frequency band, a second communication signal based on at least one of a channel status of the unlicensed frequency band or a transmission parameter associated with at least one of the first communication signal or the second communication signal.

公开(公告)号：US20200099436A1

公开(公告)日：2020-03-26

申请号：US16698049

申请日：2019-11-27

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli ,  Tamer Kadous ,  Kaushik Chakraborty

IPC: H04B7/06 ,  H04B7/0404 ,  H04B7/08

Abstract: Methods, systems, and devices for wireless communications are described that provide for refinement of receive beam beamforming parameters at a user equipment (UE). A UE may transmit two or more signals in an uplink transmission that have different beamforming parameters. A base station receiving the uplink transmission may measure the two or more signals, and identify a first signal of the two or more signals based at least in part on the measuring. The base station may inform the UE of the identified first signal, which the UE may use to set receive beam beamforming parameters for one or more subsequent downlink transmissions.

公开(公告)号：US10595342B2

公开(公告)日：2020-03-17

申请号：US15949945

申请日：2018-04-10

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Sundar Subramanian ,  Tamer Kadous

IPC: H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A wireless node may transmit directional signals in a sweeping transmission pattern while receiving communications from a second wireless node. Another wireless node may then, during a listen-before-talk (LBT) procedure, receive one of the directional signals, and terminate a correspondence communication session to avoid potential interference. Additionally or alternatively, a wireless node may listen in directions in a sweeping receive pattern while transmitting to a second wireless node. While listening, the wireless node may detect a transmission from a third wireless node in a particular direction. The wireless node may then accordingly refrain from transmitting in that direction to avoid potential interference.

公开(公告)号：US20200084759A1

公开(公告)日：2020-03-12

申请号：US16563730

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Seyed Ali Akbar Fakoorian ,  Srinivas Yerramalli ,  Qingjiang Tian ,  Andrei Dragos Radulescu ,  Tamer Kadous

IPC: H04W72/04 ,  H04W72/08 ,  H04L5/00 ,  H04W24/10

Abstract: Generally, the described techniques provide for a base station transmitting an indication of a set of one or more available channels to a user equipment (UE). The base station may transmit to the UE a first downlink burst using a first channel and a first frame period. In some cases, the base station may detect interference associated with the first downlink burst, for example, by performing a listen-before-talk (LBT) procedure or through an interference management resources (IMR) procedure in which the base station transmits reference signal signals to the UE that the UE may use to return a report on measured interference. If the base station detects interference, the base station may transmit to the UE an instruction to switch to a second channel and a second frame period, where the second channel may be selected from the set of one or more available channels.