公开(公告)号：US20210243620A1

公开(公告)日：2021-08-05

申请号：US17301917

申请日：2021-04-19

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Taesang Yoo ,  Xiaoxia Zhang

IPC: H04W24/02 ,  H04L5/00 ,  H04L27/26 ,  H04J13/14 ,  H04L27/00 ,  H04J11/00 ,  H04J13/00 ,  H04W40/24 ,  H04W74/00

Abstract: A base station may determine a root for a sequence to be included in a signal to a UE. The base station may generate a generalized Chu sequence based on the root and scramble the generalized Chu sequence using a pseudorandom sequence that is common to a plurality of base stations. The base station may transmit the scrambled generalized Chu sequence to indicate the beginning of a downlink transmission. The UE may receive this scrambled generalized Chu sequence and determine if a beginning of a downlink transmission from a serving base station based on the received generalized Chu sequence and an expected generalized Chu sequence.

公开(公告)号：US20210184748A1

公开(公告)日：2021-06-17

申请号：US17122904

申请日：2020-12-15

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Hamed Pezeshki ,  Taesang Yoo

IPC: H04B7/06 ,  H04W52/14 ,  H04W76/11 ,  H04W36/32 ,  H04W24/10

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, via a sensor included within the UE, information associated with a base station. For instance, the UE may receive, via a camera included within the UE, an image of the base station. In some cases, the information associated with the base station may also include environment information identifying an antenna of the base station. The UE may then perform, based on the received information, a beam management procedure to track a UE beam corresponding to a base station beam, and communicate with the base station based on the beam management procedure.

公开(公告)号：US10932282B2

公开(公告)日：2021-02-23

申请号：US16129545

申请日：2018-09-12

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Vikas Jain ,  Taesang Yoo ,  Tamer Kadous ,  Yongbin Wei

IPC: H04W72/04 ,  H04W72/12 ,  H04L1/18 ,  H04W74/08

Abstract: Wireless communications systems and methods related to determining scheduling and transmission timeline for communicating in a shared communication medium are provided. A first wireless communication device communicates, with a second wireless communication device, scheduling information during a first time period of a first transmission opportunity (TXOP) of a first network operating entity in a shared communication medium, the scheduling information indicating an offset time period relative to the first time period. The first wireless communication device communicates, with the second wireless communication device, a communication signal during a second TXOP subsequent to the first TXOP based on the offset time period.

公开(公告)号：US10834757B2

公开(公告)日：2020-11-10

申请号：US15677692

申请日：2017-08-15

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Xiaoxia Zhang ,  Siddhartha Mallik

IPC: H04W74/08 ,  H04W28/20 ,  H04W28/26 ,  H04W76/11 ,  H04L12/26 ,  H04W24/02

Abstract: Aspects of the disclosure relate to reserving resources in wireless communication systems, such as those employing listen before talk (LBT). The disclosed methods and apparatus employ a channel reservation preamble used in a sequence of burst or data packet transmissions. The preamble including a channel reservation indication is included in a first data packet transmitted from a first network node. The channel reservation indication is configured to indicate a transmission time reservation of channel resources covering the data packet containing the preamble, a second data packet to be received from a second network node responsive to the first data packet, and at least a portion of a third data packet transmitted from the first network node subsequent to the transmission of the second data packet. In this manner, over-reservation of channel resources is mitigated. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US10827488B2

公开(公告)日：2020-11-03

申请号：US16155750

申请日：2018-10-09

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Taesang Yoo ,  Jelena Damnjanovic ,  Aleksandar Damnjanovic ,  Arumugam Chendamarai Kannan ,  Yongbin Wei ,  Durga Prasad Malladi

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

Abstract: Various aspects described herein relate to communicating using dynamic uplink and downlink transmission time interval (TTI) switching in a wireless network. A notification can be received from a network entity of switching a configurable TTI from downlink communications to uplink communications. The configurable TTI can be one of a plurality of TTIs in a frame structure that allows dynamic switching of configurable TTIs between downlink and uplink communications within a frame. Additionally, uplink communications can be transmitted to the network entity during the configurable TTI based at least in part on the notification.

公开(公告)号：US10820316B2

公开(公告)日：2020-10-27

申请号：US15802043

申请日：2017-11-02

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Taesang Yoo ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04W72/04 ,  H04W74/08 ,  H04L5/00 ,  H04W16/14

Abstract: Multiple base stations, which may be controlled by different network operators, share a transmission medium to serve multiple user equipment (UE). A first base station determines that the shared communication medium is free. The first base station transmits, during a first medium access slot on the shared communication medium, a pre-grant for a first UE associated with the first base station. The first UE transmits a response message during the first medium access slot. Optionally, a second base station may join the transmission by transmitting a pre-grant to a second UE during a subsequent medium access slot.

公开(公告)号：US20200322941A1

公开(公告)日：2020-10-08

申请号：US16905279

申请日：2020-06-18

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Jelena Damnjanovic ,  Taesang Yoo

IPC: H04W72/04 ,  H04L1/18

Abstract: Methods, systems, and devices are described for wireless communication. A transmitting device may send a signal including multiple transport blocks corresponding to multiple simultaneous hybrid automatic repeat request (HARQ) processes. Additional control information may be used to support the multiple simultaneous HARQ processes. For instance, the additional control information may indicate the number of available HARQ processes, an activity state for each HARQ process (e.g., active new data, active retransmission, or inactive), and the redundancy versions of each HARQ process. In some cases, the additional control information may be included in a downlink grant. A receiving device may respond with an acknowledgement or negative acknowledgment (ACK/NACK) for each of the transport blocks. The transmitting device may identify a retransmission status for each HARQ process based on the ACK/NACKs, and transmit new redundancy versions (or new data) to the receiving device.

公开(公告)号：US10728928B2

公开(公告)日：2020-07-28

申请号：US16129473

申请日：2018-09-12

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Taesang Yoo ,  Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Tamer Kadous

IPC: H04W4/00 ,  H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to performing random backoff over multiple spatial dimensions in spatial listen-before-talk (LBT) procedures are provided. A first wireless communication device determines a first backoff counter for contending for a transmission opportunity (TXOP) in a communication medium over a first spatial subspace. The first wireless communication device detects a transmission in the TXOP within the first spatial subspace. The first wireless communication device determines a second backoff counter for contending for the TXOP over a second spatial subspace that is different from the first spatial subspace based on the detecting. The second spatial subspace is part of the first spatial subspace and the detected transmission is in a different spatial subspace than the second spatial subspace.

公开(公告)号：US20200214040A1

公开(公告)日：2020-07-02

申请号：US16811613

申请日：2020-03-06

Applicant: QUALCOMM INCORPORATED

Inventor： Zhifei Fan ,  Taesang Yoo ,  Xiaoxia Zhang ,  Seyed Ali Akbar Fakoorian

IPC: H04W74/08 ,  H04B7/0456 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communication are described. A first wireless device may receive a clear to send signal based precoded based at least in part on a receive filter at a second wireless device. The first wireless device may calculate a transmit precoder based at least in part on the clear to send signal. For example, the first wireless device may calculate a whitening filter and a second filter based at least in part on the clear to send signal. The first wireless device may transmit a request to send signal precoded by the transmit precoder to initiate communications with a third wireless device without significantly interfering with ongoing communications at the second wireless device.

公开(公告)号：US10687355B2

公开(公告)日：2020-06-16

申请号：US15811138

申请日：2017-11-13

Applicant: QUALCOMM Incorporated.

Inventor： Taesang Yoo ,  Jing Lei ,  Juan Montojo ,  Yongbin Wei

IPC: H04W74/00 ,  H04L5/00 ,  H04W16/14 ,  H04W72/12 ,  H04W88/04 ,  H04W74/08 ,  H04W88/06

Abstract: Methods and apparatuses for transmitting and detecting channel reservation preamble in a NR shared spectrum are described. An aspect may include determining whether a first reservation preamble of a first operator is received on a first time slot of multiple time slots of a downlink channel from a first network entity, and transmitting a second reservation preamble of the first operator on an uplink channel to the second network entity. Another aspect may include generating a first reservation preamble of a first operator based on at least one of a compressed representation in a signal space, a basis function of the signal space, or a CAZAC sequences; and transmitting, on a first timeslot of multiple time slots of a downlink channel, the first reservation preamble of the first operator to at least a UE. In another aspect, the SFN transmission of the first and second reservation preambles, and the low latency detection methods of the reservation preambles have been disclosed.