公开(公告)号：US11751073B2

公开(公告)日：2023-09-05

申请号：US17742317

申请日：2022-05-11

Applicant: QUALCOMM Incorporated

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

IPC: H04W16/28 ,  H04W72/541 ,  H04W72/044 ,  H04W74/08

CPC classification number: H04W16/28 ,  H04W72/046 ,  H04W72/541 ,  H04W74/0808

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, wireless devices operating in an unlicensed radio frequency spectrum band may perform directional listen-before-talk (LBT) procedures to gain access to a channel. In a beam-shrinking scheme for directional LBT, a wireless device may start an LBT procedure using a first beam (e.g., a wide beam). If the clear channel assessment (CCA) fails for the first beam (e.g., due to directional interference), the device may switch the LBT procedure to a second beam (e.g., a narrower beam). Depending on the direction of the interference source, the second beam may result in a successful LBT procedure. In a beam sweeping scheme for directional LBT, a wireless device may perform concurrent LBT over multiple narrow beams. If any beam of the set of beams detects frequent or continuous interference, the device may drop that beam from the concurrent LBT procedure.

公开(公告)号：US11742990B2

公开(公告)日：2023-08-29

申请号：US17035424

申请日：2020-09-28

Applicant: QUALCOMM Incorporated

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

IPC: H04L1/1812 ,  H04B17/336 ,  H04L1/1829

CPC classification number: H04L1/1812 ,  H04B17/336 ,  H04L1/1835

Abstract: The present disclosure discloses apparatuses, systems, and methods of wireless communication that use an adaptive hybrid automatic repeat request (HARQ) procedure and a multi-threaded HARQ procedure for improving HARQ buffer utilization and management. A user equipment (UE) can transmit a reset NACK to reduce the amount of HARQ buffers needed for concurrent HARQ processes. A base station can transmit different redundancy data in a HARQ retransmission depending on the types of NACK the UE transmitted. The base station can communicate with the UE using multiple light HARQ processes or threads that use less HARQ buffers than a typical HARQ procedure. Other aspects, features, and embodiments are also claimed and described.

公开(公告)号：US11716758B2

公开(公告)日：2023-08-01

申请号：US17160058

申请日：2021-01-27

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Vinay Chande ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Aleksandar Damnjanovic ,  Jing Sun ,  Tao Luo

IPC: H04W74/08 ,  H04W16/28 ,  H04W24/08 ,  H04W16/14

CPC classification number: H04W74/0816 ,  H04W16/14 ,  H04W16/28 ,  H04W24/08

Abstract: Systems and methods implementing receiver assisted channel access procedures configured to enable access for a potential transmitter while avoiding introducing unacceptable interference with respect to ongoing communications in a shared channel are described. In examples, a receiver assisted channel access procedure implements a LBT enhanced CCA (eCCA) technique in which receiver assisted transmitter sensing is utilized. A receiver assisted channel access procedure may implement monitoring of a shared channel during a contiguous contention period for one or more instances of a periodic session protection signal.

公开(公告)号：US11689945B2

公开(公告)日：2023-06-27

申请号：US17196891

申请日：2021-03-09

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/00 ,  H04W24/08 ,  H04L5/00 ,  H04W24/10

CPC classification number: H04W24/08 ,  H04L5/0048 ,  H04W24/10

Abstract: Methods, systems, and devices for wireless communications are described. The methods, systems, and devices may enable a base station to transmit a measurement configuration for measuring interference (e.g., cross link interference (CLI)). The measurement configuration may include a measurement direction configuration for measuring the interference. Additionally or alternatively, the UE may select a measurement direction configuration for measuring interference based on the measurement configuration. The UE may measure interference based on the measurement configuration. The UE may transmit a measurement report to the base station. The measurement report may include an indication of the selected measurement direction configuration.

公开(公告)号：US11672011B2

公开(公告)日：2023-06-06

申请号：US17221521

申请日：2021-04-02

Applicant: QUALCOMM Incorporated

Inventor： Giovanni Chisci ,  Jing Sun ,  Arumugam Chendamarai Kannan ,  Vinay Chande ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang

IPC: H04W74/08 ,  H04W16/28

CPC classification number: H04W74/0816 ,  H04W16/28

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter node may determine a set of desired transmit beams to use for transmissions during a channel occupancy time (COT), wherein each transmit beam in the set of desired transmit beams is associated with an energy detection threshold (EDT). The transmitter node may configure a sensing beam associated with a directional listen-before-talk (LBT) procedure, wherein the sensing beam is associated with an EDT that is at least as strict as a strictest EDT associated with the set of desired transmit beams. The transmitter node may transmit using the set of desired transmit beams during the COT, wherein the COT is initiated based at least in part on an indication that the directional LBT procedure succeeded using the sensing beam. Numerous other aspects are described.

公开(公告)号：US11665700B2

公开(公告)日：2023-05-30

申请号：US17125059

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Vinay Chande ,  Xiaoxia Zhang ,  Arumugam Chendamarai Kannan ,  Srinivas Yerramalli ,  Tao Luo ,  Juan Montojo ,  Aleksandar Damnjanovic

IPC: H04W72/04 ,  H04W72/14 ,  H04L5/00 ,  H04W74/08 ,  H04W72/0446 ,  H04L1/1812

CPC classification number: H04W72/14 ,  H04L1/1812 ,  H04L5/0055 ,  H04W72/042 ,  H04W72/0446 ,  H04W74/0808

Abstract: Aspects are provided which improve LBT by associating contention windows with transmission burst lengths and by allowing contention windows and maximum burst lengths to be adjusted based on interference activity. For downlink, a UE receives a PG for a downlink transmission from a base station indicating a CCA length based on a contention window size associated at least with a burst length for the downlink transmission. The UE performs, after receiving the pre-grant, a CCA based on the CCA length, transmits an APG to the base station when the CCA is successful, and receives the downlink transmission in response to the APG. For uplink, the base station performs a CCA based on a contention window associated at least with a burst length for an uplink transmission, transmits an uplink grant to the UE when the CCA is successful, and receives the uplink transmission in response to the uplink grant.

公开(公告)号：US11647539B2

公开(公告)日：2023-05-09

申请号：US17170232

申请日：2021-02-08

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08

CPC classification number: H04W74/0808

Abstract: Methods, systems, and devices for wireless communications are described. A first wireless device may receive a clear channel assessment trigger from a second wireless device, the clear channel assessment trigger associated with a data transmission by the second wireless device. The first wireless device may transmit, based at least in part on a result of a first clear channel assessment procedure, feedback information for the clear channel assessment trigger. The first wireless device may receive the data transmission based at least in part on the feedback information for the first clear channel assessment procedure. The first wireless device may transmit, based at least in part on a result of a second clear channel assessment procedure, feedback information for the data transmission, wherein the first clear channel assessment procedure has a first duration that is longer than a second duration for the second clear channel assessment procedure.

公开(公告)号：US11638243B2

公开(公告)日：2023-04-25

申请号：US17093466

申请日：2020-11-09

Applicant: QUALCOMM Incorporated

Inventor： Vinay Chande ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Jing Sun ,  Mostafa Khoshnevisan ,  Srinivas Yerramalli ,  Tao Luo

IPC: H04W72/12 ,  H04W72/04 ,  H04L5/00 ,  H04W72/0446 ,  H04W72/1273

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive single downlink control information (DCI) that indicates resources for a plurality of transmission configuration indicator (TCI) states for transmitting or receiving communications in a plurality of transmission time intervals (TTIs). The UE may transmit or receive the communications in the plurality of TTIs in accordance with the DCI. Numerous other aspects are provided.

公开(公告)号：US11622385B2

公开(公告)日：2023-04-04

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：US11553500B2

公开(公告)日：2023-01-10

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 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04W56/00

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.