公开(公告)号：US11229033B2

公开(公告)日：2022-01-18

申请号：US16855866

申请日：2020-04-22

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/08 ,  H04W24/08 ,  H04W72/04 ,  H04W76/27 ,  H04W56/00 ,  H04W80/02 ,  H04W16/28

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) in communication with a serving base station may identify that the UE is a potential victim of interference from a neighboring base station. The UE may transmit an interference coordination message to the neighboring base station. The interference coordination message may request modification of one or more transmission parameters at the neighboring base station. The neighboring base station may modify its transmission parameters to decrease interference with the UE, and the UE may communicate with the serving base station after transmitting the interference coordination message.

公开(公告)号：US11219070B2

公开(公告)日：2022-01-04

申请号：US16795281

申请日：2020-02-19

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W56/00 ,  H04W76/27 ,  H04W72/04 ,  H04L1/16

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select a random access channel (RACH) signature from among one or more RACH signatures associated with a synchronization signal block (SSB). The UE may transmit, to a base station (BS), a RACH communication using the selected RACH signature. Numerous other aspects are provided.

公开(公告)号：US20210289374A1

公开(公告)日：2021-09-16

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: H04W24/08 ,  H04W24/10 ,  H04L5/00

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：US20210266962A1

公开(公告)日：2021-08-26

申请号：US17182508

申请日：2021-02-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08

Abstract: Methods, systems, and devices for wireless communications are described in which a transmitting device using shared radio frequency spectrum may perform a listen before talk (LBT) procedure for at least a minimum dwell time and, upon successful completion of the LBT procedure, may occupy the spectrum for up to a duration of a channel occupancy time (COT). The transmitting device may discontinue transmitting during the COT for a gap period, and resume transmitting subsequent to the gap period without performing another LBT procedure. The minimum dwell time may be based on a periodicity of a channel reservation signal transmitted by one or more other devices using the shared radio frequency spectrum. In some cases, the transmitting device may schedule one or more receiving devices with resources for transmissions during the COT, and the receiving devices may perform a LBT that is non-adjacent with an associated transmission.

公开(公告)号：US20210235302A1

公开(公告)日：2021-07-29

申请号：US17154397

申请日：2021-01-21

Applicant: QUALCOMM Incorporated

Inventor： Vinay Chande ,  Arumugam Chendamarai Kannan ,  Yan Zhou ,  Xiaoxia Zhang ,  Tao Luo

IPC: H04W24/10

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may support channel state information (CSI) operations, such as CSI reporting. A UE may identify a change in CSI pertaining to communications with a base station or any other change in communications with a base station. The UE may transmit, to the base station and based on the change in CSI, a CSI scheduling request, which may include an indication to activate or grant resources for a CSI report transmission from the UE to the base station. The UE may receive, from the base station, a CSI report trigger based on the CSI scheduling request, and transmit, in response to receipt of the CSI report trigger, a CSI report over a physical layer uplink channel (e.g., a physical uplink shared channel (PUSCH)).

公开(公告)号：US11076421B2

公开(公告)日：2021-07-27

申请号：US16722485

申请日：2019-12-20

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/00 ,  H04W72/04 ,  H04W74/08 ,  H04W72/02 ,  H04W72/00

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select, for a first message of a random access channel (RACH) procedure and based at least in part on whether the UE has beam correspondence, at least one of: a set of time-frequency resources for the first message of the RACH procedure, or a preamble for the first message of the RACH procedure. In some aspects, the UE may transmit, to a base station and based at least in part on selecting the at least one of the set of time-frequency resources or the preamble, the first message of the RACH procedure. Numerous other aspects are provided.

公开(公告)号：US20210029656A1

公开(公告)日：2021-01-28

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：US20210007117A1

公开(公告)日：2021-01-07

申请号：US16915259

申请日：2020-06-29

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04L27/26 ,  H04L12/24 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described. In some systems implementing beamforming, a neighboring base station may cause interference to a user equipment (UE) served by a different base station. To mitigate unexpected interference, an interference coordination region including time and frequency resources may be configured between the base stations. The interference coordination region may be configured based on long-term information for the base stations and may include one or both of a set of beam-avoidance sub-regions or a set of beam-preference sub-regions for a base station, where each sub-region is associated with a beam index. A base station may schedule a communication beam in the interference coordination region based on a beam-avoidance region (e.g., refraining from using a particular communication beam) or a beam-preference region (e.g., prioritizing a particular communication beam). The base station may transmit a message to a UE using the scheduled communication beam.

公开(公告)号：US20200252806A1

公开(公告)日：2020-08-06

申请号：US16745281

申请日：2020-01-16

Applicant: QUALCOMM Incorporated

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

IPC: H04W16/28 ,  H04W74/08 ,  H04W72/04 ,  H04W72/08

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：US10651987B2

公开(公告)日：2020-05-12

申请号：US15251093

申请日：2016-08-30

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Chirag Patel ,  Peter Gaal ,  Vinay Chande ,  Nachiappan Valliappan ,  Ahmed Sadek

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/12 ,  H04W16/14 ,  H04W88/08 ,  H04W84/04 ,  H04W16/32

Abstract: Techniques for operator identification on a shared communication medium are disclosed. An access point may determine an operator identifier for an operator associated with an access point and configure a set of resource elements to carry an operator identifier reference signal embedded with the operator identifier. The access point may then transmit the operator identifier reference signal using the configured set of resource elements. An access terminal may receive signaling from an access point on a set of resource elements and monitor the signaling for an operator identifier reference signal. The access terminal may then determine an operator identifier for an operator associated with the access point based on the operator identifier reference signal.