公开(公告)号：US11317445B2

公开(公告)日：2022-04-26

申请号：US16737293

申请日：2020-01-08

Applicant: QUALCOMM Incorporated

Inventor： Zhifei Fan ,  Xiaoxia Zhang ,  Tao Luo ,  Arumugam Chendamarai Kannan ,  Jing Sun

IPC: H04W74/08 ,  H04W72/12 ,  H04L5/00 ,  H04W72/04

Abstract: Wireless communications systems and methods related to transmitting communication signals are provided. A first wireless communication device performs a first LBT during a first time period for transmitting a first communication signal associated with a first priority. The first wireless communication device performs a second LBT during a second time period for transmitting a second communication signal associated with a second priority, wherein the first time period is at least partially overlapping with the second time period, and wherein the first priority is different from the second priority. The first wireless communication device communicates with a second wireless communication device, at least one of the first communication signal or the second communication signal based on at least one of the first LBT or the second LBT.

公开(公告)号：US11240688B2

公开(公告)日：2022-02-01

申请号：US16893270

申请日：2020-06-04

Applicant: QUALCOMM Incorporated

Inventor： Sungwoo Park ,  Arumugam Chendamarai Kannan ,  Tao Luo ,  Xiaoxia Zhang ,  Jing Sun ,  Srinivas Yerramalli ,  Vinay Chande ,  Olufunmilola Omolade Awoniyi-Oteri ,  Sony Akkarakaran ,  Mostafa Khoshnevisan ,  Zhifei Fan ,  Kaushik Chakraborty

IPC: H04W24/02 ,  H04W72/12 ,  H04B17/336

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, transmissions from a neighboring base station may interfere with downlink transmissions from a serving base station to a target user equipment (UE). To coordinate interference between the base stations (e.g., mitigate interference, stabilize interference, etc.), the serving base station may generate an interference coordination message and may transmit the message over-the-air (OTA) to one or more neighboring base stations. The message may include parameters indicating a coordination scheme for the neighboring base station(s) to use for modifying one or more scheduling decisions. The coordination scheme may be configured or dynamically selected and may include interfering beam fixation, interfering beam suppression, or interfering beam avoidance. A neighboring base station receiving the OTA interference coordination message may modify a scheduling decision to mitigate or stabilize interference when the serving base station is transmitting to the target UE.

公开(公告)号：US11224034B2

公开(公告)日：2022-01-11

申请号：US16719133

申请日：2019-12-18

Applicant: QUALCOMM Incorporated

Inventor： Wooseok Nam ,  Zhifei Fan ,  Tao Luo ,  Yan Zhou ,  Xiaoxia Zhang ,  Jing Sun

IPC: H04W72/04 ,  H04W74/08

Abstract: A base station may access a channel following a successful channel access procedure. The base station may transmit an indication of a resource allocation to a user equipment (UE). The resource allocation may include an allocation of resources for subsequent communications between the base station and the UE, for example, defining a set of transmission time intervals (TTIs) during which the UE may transmit repetitions of uplink control information. The UE may also perform a channel access procedure to access the channel. The UE may transmit repetitions of the uplink control information using the set of TTIs according to the resource configuration. In some cases, the UE may stop transmitting uplink control information repetitions after a maximum number repetitions also according to the resource configuration. The base station may then receive and combine the uplink control information.

公开(公告)号：US20210352631A1

公开(公告)日：2021-11-11

申请号：US16868330

申请日：2020-05-06

Applicant: QUALCOMM Incorporated

Inventor： Zhifei Fan ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Srinivas Yerramalli ,  Wooseok Nam ,  Sungwoo Park ,  Arumugam Chendamarai Kannan

IPC: H04W72/04 ,  H04L1/00 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04W76/11

Abstract: A base station transmits a first downlink control information (DCI) portion in a physical downlink control channel (PDCCH), wherein the first DCI portion indicates a second DCI portion. The base station jointly encodes multiple component DCIs, each of the component DCIs providing a resource allocation in combination with the first DCI portion. The apparatus transmits the second DCI portion comprising the jointly encoded multiple component DCIs in a physical downlink shared channel (PDSCH).

公开(公告)号：US20210321383A1

公开(公告)日：2021-10-14

申请号：US17225893

申请日：2021-04-08

Applicant: QUALCOMM Incorporated

Inventor： Wooseok Nam ,  Tao Luo ,  Jing Sun ,  Xiaoxia Zhang ,  Zhifei Fan ,  Juan Montojo ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Sungwoo Park

IPC: H04W72/04 ,  H04W8/22

Abstract: Methods, systems, and devices for wireless communications are described. A device such as a user equipment (UE) or a base station may identify a beam switching capability of the UE, the beam switching capability indicating a threshold quantity of beam switches during a transmission time interval, a threshold quantity of symbol periods between beam switching operations, or a combination thereof. The device may determine that the beam switching capability of the UE is satisfied based at least in part on one or more parameters (e.g., one or more symbol period durations, one or more quantities of beam switches during a transmission time interval, one or more adjustment parameters, one or more threshold values associated with the capability of the UE, etc.). The device may perform one or more beam switching operations based on determining that the beam switching capability is satisfied.

公开(公告)号：US11064396B2

公开(公告)日：2021-07-13

申请号：US16125258

申请日：2018-09-07

Applicant: QUALCOMM Incorporated

Inventor： Zhifei Fan ,  Xiaoxia Zhang ,  Jing Sun ,  Aleksandar Damnjanovic

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

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for transmitting channel reservation signals. In one example, a device used a gating interval to gain access to a channel of a shared spectrum, performs a clear channel assessment to determine if the channel is available, selects a channel reservation signal from among a plurality of predetermined channel reservation signals if the channel is clear, and transmits the channel reservation signal upon the channel being clear. The channel reservation signal comprises a preamble, and a message, wherein the CR preamble and the CR message use a common numerology understood by at least one of different radio access technologies, and different numerologies in the same radio access technology, and the radio access technologies comprise WIFI and NR-SS.

公开(公告)号：US20210204326A1

公开(公告)日：2021-07-01

申请号：US17127632

申请日：2020-12-18

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Zhifei Fan ,  Arumugam Chendamarai Kannan ,  Srinivas Yerramalli ,  Wooseok Nam ,  Tao Luo ,  Sungwoo Park

IPC: H04W74/08 ,  H04W76/11 ,  H04W72/04 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. The method includes receiving a random access configuration for the UE, the random access configuration indicating a subcarrier spacing for random access preambles of a random access procedure and a periodicity of slots including random access channel occasions for transmission of the random access preambles, where the periodicity of the slots is based on the subcarrier spacing for the random access preambles, determining a random access radio network temporary identifier based on the periodicity of the slots and a slot index for a slot in which the UE is to transmit a random access preamble, and transmitting, in the slot, the random access preamble indicating the determined random access radio network temporary identifier.

公开(公告)号：US10750484B2

公开(公告)日：2020-08-18

申请号：US16191257

申请日：2018-11-14

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Seyed Ali Akbar Fakoorian ,  Zhifei Fan ,  Jing Sun

IPC: H04W72/04 ,  H04B1/713 ,  H04L5/00 ,  H04J13/00 ,  H04B1/707 ,  H04W16/14

Abstract: Wireless communications systems and methods related to multiplexing uplink control channel signals from different users are provided. A first wireless communication device obtains an uplink control channel multiplex configuration indicating a first frequency spreading sequence and at least one of a second frequency spreading sequence or a first spatial direction. The first wireless communication device communicates, with a second wireless communication device, a first uplink control channel signal including a first reference signal and a first uplink control information signal in a frequency spectrum based on the uplink control channel multiplex configuration. The first reference signal is based on the first frequency spreading sequence and the first uplink control information signal is based on at least one of the second frequency spreading sequence or the first spatial direction.

公开(公告)号：US10588151B2

公开(公告)日：2020-03-10

申请号：US15969625

申请日：2018-05-02

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：US20190335491A1

公开(公告)日：2019-10-31

申请号：US16392339

申请日：2019-04-23

Applicant: QUALCOMM Incorporated

Inventor： Kiran Venugopal ,  Makesh Pravin John Wilson ,  Tianyang Bai ,  Tao Luo ,  Xiaoxia Zhang ,  Zhifei Fan

IPC: H04W72/12 ,  H04W72/04 ,  H04W76/27 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control information indicating a resource allocation pattern for a downlink transmission that is configured for transmission using a plurality of beams and a plurality of mini-slots, where a duration of a mini-slot is less than a duration of a slot. The UE may identify a start time of a first mini-slot of the plurality of mini-slots and a length of the first mini-slot based on the resource allocation pattern, and receive the downlink transmission based on the start time of the first mini-slot and the length of the first mini-slot.