公开(公告)号：US11617210B2

公开(公告)日：2023-03-28

申请号：US17195191

申请日：2021-03-08

Applicant: QUALCOMM Incorporated

Inventor： Iyab Issam Sakhnini ,  Xiaoxia Zhang ,  Jing Sun ,  Tao Luo ,  Zhifei Fan ,  Arumugam Chendamarai Kannan ,  Juan Montojo ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Qiang Wu ,  Jun Ma ,  Mehmet Izzet Gurelli

IPC: H04L27/26 ,  H04W74/00 ,  H04W74/08

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a physical random access channel (PRACH) preamble configuration that indicates a first preamble format for a first PRACH preamble and a second preamble format for a second PRACH preamble, wherein the first preamble format is different from the second preamble format. The UE may transmit the first PRACH preamble as part of a random access procedure based at least in part on the PRACH preamble configuration, wherein transmitting the first PRACH preamble enables a determination of a symbol boundary offset. The UE may transmit the second PRACH preamble as part of the random access procedure based at least in part on the PRACH preamble configuration, wherein transmitting the second PRACH preamble enables a determination of a symbol timing offset. Numerous other aspects are described.

公开(公告)号：US11606243B2

公开(公告)日：2023-03-14

申请号：US17158656

申请日：2021-01-26

Applicant: QUALCOMM Incorporated

Inventor： Hamed Pezeshki ,  Arumugam Chendamarai Kannan ,  Tao Luo

IPC: H04L41/0668 ,  H04L43/08 ,  G06N20/00 ,  H04B17/318 ,  H04L41/16 ,  H04L5/00

Abstract: Certain aspects of the present disclosure provide techniques for beam failure detection in a second band based on measurements in a first band. A method that may be performed by a user equipment (UE) includes receiving one or more reference signals (RSs) on a first radio frequency band and initiating a beam failure recovery on a second radio frequency band based, at least in part, on the one or more RSs on the first radio frequency band. The UE may measure the one or more RSs on the first radio frequency band and perform beam failure detection (BFD) for the second radio frequency band based, at least in part, on one or more measurements of the one or more RSs on the first radio frequency band.

公开(公告)号：US11595823B2

公开(公告)日：2023-02-28

申请号：US16519989

申请日：2019-07-23

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Aleksandar Damnjanovic

IPC: H04W16/14 ,  H04W72/04 ,  H04W28/26 ,  H04W74/08 ,  H04W72/0453

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a trigger signal indicating that a base station has obtained access to a shared radio frequency spectrum band. The UE may transmit, in response to the trigger signal, a trigger response signal configured to reserve a channel of the shared radio frequency spectrum band for a downlink transmission by the base station, where the trigger response signal is transmitted for a time period extending to a scheduled beginning of the downlink transmission. The UE may receive the downlink transmission after an expiration of the time period and based at least in part on the trigger signal.

公开(公告)号：US11595102B2

公开(公告)日：2023-02-28

申请号：US17238141

申请日：2021-04-22

Applicant: QUALCOMM Incorporated

Inventor： Hamed Pezeshki ,  Tao Luo ,  Sony Akkarakaran ,  Junyi Li ,  Taesang Yoo ,  Qiang Wu ,  Arumugam Chendamarai Kannan ,  Jingchao Bao

IPC: H04L1/02 ,  H04B7/06 ,  G06N20/00

Abstract: Various aspects relate generally to the beam management procedures in wireless communications systems. Some aspects more specifically relate to the selection of beams for communications to and from a UE and a network entity based on quantized orientation information for a user equipment (UE). In some implementations, a network entity can use the quantized orientation information and a machine learning model to predict a set of beams that may be suitable for communications to and from the UE and the network entity, which may be a subset of the beams that the network entity can generally use for communications to and from the UE and the network entity.

公开(公告)号：US20230025831A1

公开(公告)日：2023-01-26

申请号：US17384586

申请日：2021-07-23

Applicant: QUALCOMM Incorporated

Inventor： Vinay Chande ,  Jing Sun ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Tao Luo

IPC: H04W74/08 ,  H04W24/08

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for selecting a minimum measurement duration in listen-before-talk (LBT) sensing slots for high band unlicensed channel access. In some examples, a device may select a minimum sensing duration for an LBT procedure according to a sensing bandwidth or an energy threshold (such as an energy detection threshold or an energy power spectral density threshold), or both. As part of the LBT procedure, the device may measure or sense a wireless channel for at least the selected minimum sensing duration in each sensing slot of the LBT procedure. The device may selectively transmit on the wireless channel according to a result of the LBT procedure. For example, the device may either transmit or refrain from transmitting on the wireless channel depending on whether the device senses the wireless channel to be available.

公开(公告)号：US11558902B2

公开(公告)日：2023-01-17

申请号：US17392084

申请日：2021-08-02

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Tao Luo ,  Jing Sun ,  Rajat Prakash ,  Juan Montojo

IPC: H04W74/08 ,  H04W16/14

Abstract: Aspects relate to spectrum sharing for use in a wireless communication network that serves both prioritized and non-prioritized user access terminals. In one example, a user access terminal, e.g., a user equipment (UE), senses an amount of signal energy within a frequency band during one or more sensing intervals in response to a determination that the access terminal is a non-prioritized access terminal. If the amount of signal energy does not exceed a sensed energy threshold, the user access terminal transmits wireless signals following the sensing intervals. On the other hand, if the amount of signal energy exceeds the sensed energy threshold, the user access terminal modifies transmissions while the amount of signal energy sensed during one or more subsequent sensing intervals exceeds the sensed energy threshold. For example, the access terminal may delay or adjust transmissions until the amount of signal energy no longer exceeds the sensed energy threshold.

公开(公告)号：US11539405B2

公开(公告)日：2022-12-27

申请号：US17088366

申请日：2020-11-03

Applicant: QUALCOMM Incorporated

Inventor： Hamed Pezeshki ,  Arumugam Chendamarai Kannan ,  Tao Luo ,  Yan Zhou ,  Wooseok Nam ,  Kiran Venugopal

IPC: H04B7/06 ,  H04B7/0417 ,  H04B7/0456 ,  H04B17/318 ,  H04B17/336 ,  H04W24/10

Abstract: In one aspect, a method of wireless communication includes receiving, by a user equipment (UE), data from one or more beam pairs of a plurality of beams at least partially concurrently; determining, by the UE, one or more signal parameters for the one or more beam pairs; determining, by the UE, one or more joint quasi co-located (QCL) indicators for the one or more beam pairs and one or more non-joint QCL indicators for the one or more beam pairs; and transmitting, by the UE, a measurement report including the one or more joint QCL indicators and the one or more non-joint QCL indicators. In another aspect, a method of wireless communication includes determining a particular beam or beams for transmitting second data based on the measurement report; and transmitting the second data using the particular beam or beams. Other aspects and features are also claimed and described.

公开(公告)号：US11528616B2

公开(公告)日：2022-12-13

申请号：US17062378

申请日：2020-10-02

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Arumugam Chendamarai Kannan ,  Bin Tian ,  Rahul Malik

IPC: H04W16/14 ,  H04L27/00 ,  H04W74/08 ,  H04L27/26

Abstract: Methods, systems, and devices are described for wireless communication at a device. A Long Term Evolution Unlicensed (LTE-U) device may transmit an enhanced preamble that may be understood by Wireless Local Area Network (WLAN) devices, in addition to conveying a characteristic that is detectable by receiving LTE-U devices. The transmitting LTE-U device may generate the enhanced preamble by generating a first training field and a second training field. The characteristic that is detectable by receiving LTE-U devices may be a phase shift between the first and second training fields. Additionally or alternatively, the characteristic may be a sequence or tone mapping of the first or second training field. In some cases, the transmitting LTE-U device may introduce a third training field to the preamble which serves as the characteristic.

公开(公告)号：US11490344B2

公开(公告)日：2022-11-01

申请号：US17070644

申请日：2020-10-14

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Vinay Chande ,  Xiaoxia Zhang ,  Tao Luo ,  Jing Sun ,  Makesh Pravin John Wilson

IPC: H04W56/00 ,  H04W16/28 ,  H04W74/08 ,  H04W72/04 ,  H04W24/08

Abstract: Methods, systems, and devices for wireless communications are described that provide staggered synchronization signal blocks (SSBs) in frequency sub-bands for beamformed wireless communications. Transmissions of SSBs and control channel transmissions (e.g., remaining minimum system information (RMSI) physical downlink control channel (PDCCH) transmissions) may use multiple transmission beams in a beam sweeping procedure. The SSB transmissions may be transmitted using transmission beams that span one frequency sub-band of a number of available frequency sub-bands, and the control channel transmissions may use transmission beams that span two or more of the frequency sub-bands. The SSB beam sweeping procedure may be performed separately during staggered, non-overlapping time periods for each frequency sub-band of the number of frequency sub-bands. Each of the of SSBs may indicate a reference timing of the base station used to identify a set of resources (e.g., a control resource set (CORESET)) that carries control channel transmissions.

公开(公告)号：US11463138B2

公开(公告)日：2022-10-04

申请号：US17247664

申请日：2020-12-18

Applicant: QUALCOMM INCORPORATED

Inventor： Hamed Pezeshki ,  Tao Luo ,  Taesang Yoo ,  Mahmoud Taherzadeh Boroujeni ,  Arumugam Chendamarai Kannan ,  Jingchao Bao ,  Sony Akkarakaran ,  Ajay Gupta

IPC: H04L23/02 ,  H04B7/0456 ,  G06N3/08

Abstract: Wireless communications systems and methods related to indicating antenna configuration information and neural network information are disclosed. Neural network information may be selected for an encoder side based on an antenna configuration of a first device housing the encoder. This information may be transmitted with the antenna configuration information to a second device, which may jointly train the neural network with the first device. The first device may further transmit one or more weights after the training, which are stored with the antenna configuration information at the second device as well. When a third device with similar antenna configuration as the first device establishes communication with the second device, the second device may transmit neural network information, as well as weights, to the third device. The third device may use this information, instead of default information, to speed up neural network initialization and training.