公开(公告)号：US20210083830A1

公开(公告)日：2021-03-18

申请号：US17001653

申请日：2020-08-24

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Sony Akkarakaran ,  Jing Sun ,  Taesang Yoo

IPC: H04L5/00 ,  H04W74/00

Abstract: Methods, systems, and devices for transmitting a positioning reference signal over a channel within a window including a set of positioning reference signal transmission opportunities. A device may identify the window and perform a channel access procedure to access the channel during the window. Based on performing the channel access procedure, the device may obtain access to the channel and determine that a portion of the positioning reference signal transmission opportunities are remaining within the window. The device may transmit a positioning reference signal during one or more of the remaining positioning reference signal transmission opportunities. In some cases, the device may refrain from transmitting a positioning reference signal during a portion of a positioning reference signal transmission opportunity even if the device gains access to the channel during that portion of the positioning reference signal transmission opportunity.

公开(公告)号：US10912097B2

公开(公告)日：2021-02-02

申请号：US16276101

申请日：2019-02-14

Applicant: QUALCOMM INCORPORATED

Inventor： Qingjiang Tian ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Jing Sun ,  Chih-Hao Liu

IPC: H04W72/10 ,  H04W72/04 ,  H04W74/08 ,  H04W88/02 ,  H04W88/08 ,  H04W74/04

Abstract: Indication of transmission priority class is disclosed for sharing a base station's maximum channel occupancy time (MCOT) for use in autonomous uplink (AUL). Aspects of the disclosure provide for implicitly sharing the MCOT by providing an indication of transmission opportunity (TxOP) length. A serving base station sends an indication of a current TxOP length in control signals to a user equipment (UE). The UE may then infer a set of potential transmission priorities used by the serving base station according to the TxOP length, as TxOP length may relate to the MCOT, which itself may be associated with a particular transmission priority class. The UE may then, conservatively, select the highest transmission priority of the set of potential transmission priorities for autonomously transmitting any uplink data having at least the selected highest transmission priority within configured AUL resource of the current TxOP.

公开(公告)号：US10893523B2

公开(公告)日：2021-01-12

申请号：US15635000

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous ,  Chih-Hao Liu ,  Chirag Patel ,  Alberto Rico Alvarino

IPC: H04W72/04 ,  H04W74/08 ,  H04W4/70 ,  H04W28/26 ,  H04W16/14 ,  H04W88/02 ,  H04W88/08 ,  H04L1/12 ,  H04B1/713 ,  H04L1/18 ,  H04L29/08 ,  H04L5/00 ,  H04L5/14

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus may perform a dual CCA procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful. The apparatus may transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful and may refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful. In performing the dual CCA procedure, the apparatus may perform CCA for a first period of time then perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

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：US10798602B2

公开(公告)日：2020-10-06

申请号：US16046868

申请日：2018-07-26

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04W4/00 ,  H04W24/10 ,  H04B1/713 ,  H04W72/04 ,  H04W36/00 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for cell measurement associated with a frequency hopping system. The base station may then receive a measurement report based on the configuration. A user equipment (UE) may receive a configuration for cell measurement associated with a frequency hopping system. The UE may generate a measurement report based on the configuration. The UE may then transmit the measurement report to a serving base station.

公开(公告)号：US10772113B2

公开(公告)日：2020-09-08

申请号：US15887277

申请日：2018-02-02

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Ahmed Kamel Sadek ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04 ,  H04L27/26 ,  H04L1/00 ,  H04L1/18 ,  H04W74/00 ,  H04L1/16 ,  H04L5/00 ,  H04W28/06 ,  H04W74/08

Abstract: Techniques for autonomous uplink (AUL) transmissions are provided that allow for efficient use of shared radio frequency spectrum band resources. A user equipment (UE) may determine a duration of an AUL transmission and modify an uplink waveform or provide an indication to a base station of one or more channel resources that may be available for base station transmissions, in order to more fully utilize shared radio frequency spectrum band resources within a maximum channel occupancy time (MCOT). A base station may activate or deactivate AUL transmissions through downlink control information (DCI) transmitted to the UE. A UE and base station may exchange various other control information to provide relatively efficient autonomous uplink transmissions and use of the shared radio frequency spectrum band resources.

公开(公告)号：US20200252959A1

公开(公告)日：2020-08-06

申请号：US16778170

申请日：2020-01-31

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Srinivas Yerramalli ,  Andrei Dragos Radulescu ,  Xiaoxia Zhang

IPC: H04W72/14 ,  H04L5/00 ,  H04W56/00 ,  H04W74/08

Abstract: Design of uplink transmissions and random access transmission is disclosed. A user equipment (UE) that has established a connection with a serving base station may receive an uplink grant that includes an identification of a starting position relative to the starting symbol associated with the uplink grant. The UE determines that the starting symbol associated with the uplink grant also aligns with a configured random access occasion. When the scheduled uplink symbol overlaps with the random access opportunity, the UE can transmit its uplink transmission from the starting position identified in the uplink grant, wherein the starting position is shifted from the starting symbol by a shift value equal to at least a timing advance associated with the serving base station.

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：US10721743B2

公开(公告)日：2020-07-21

申请号：US15954497

申请日：2018-04-16

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Tao Luo ,  Peter Gaal

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

Abstract: Uplink control channel management is disclosed for LTE/LTE-A communication systems with unlicensed spectrum in which two or more physical resource blocks (PRBs) are allocated for uplink control channel transmission. The uplink control information (UCI) payload may be determined based on clear channel assessment (CCA) information associated with carriers scheduled for transmission of the UCI data. With the UCI payload determined, two or more uplink control channel messages may be generated according to at least one control channel format, wherein uplink control channel messages include the UCI payload. These generated uplink control channel messages may then be transmitted over the allocated PRBs.

公开(公告)号：US10715292B2

公开(公告)日：2020-07-14

申请号：US15462356

申请日：2017-03-17

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Jing Sun ,  Alberto Rico Alvarino ,  Srinivas Yerramalli

IPC: H04L5/00 ,  H04W72/04

Abstract: Techniques for wireless communication are described. A method for wireless communication at a user equipment (UE) includes identifying a physical uplink shared channel (PUSCH) to transmit in an uplink pilot time slot (UpPTS) of a subframe, determining whether to transmit uplink control information (UCI) on the PUSCH in the UpPTS, and transmitting the PUSCH in the UpPTS based at least in part on the determining. A method for wireless communication at a network access device includes determining whether to schedule a transmission of UCI on a PUSCH in a UpPTS of a subframe, scheduling the PUSCH in the UpPTS based at least in part on the determining, and transmitting, to a UE, scheduling information for the PUSCH in the UpPTS.