公开(公告)号：US20200313816A1

公开(公告)日：2020-10-01

申请号：US16819543

申请日：2020-03-16

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Kapil Bhattad ,  Tanumay Datta

IPC: H04L5/00 ,  H04W74/08 ,  H04W16/14 ,  H04W72/04 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communications are described for managing sounding reference signal (SRS) transmissions in shared radio frequency spectrum. Described techniques provide for increased occasions at which a SRS may be transmitted, enhance likelihood of a successful listen-before-talk (LBT) procedure, or any combinations thereof. Increased occasions for SRS may be provided through multiple transmission times that are available in the event of an earlier LBT failure. Enhanced likelihood of successful LBT may be provided through one or more timing offsets that may be randomly selected from a set of available timing offsets, selection of a cyclic prefix length for a SRS based on whether the SRS transmission is within or outside of a channel occupancy time of a base station, providing an initial SRS transmission time for an initial periodic time interval, triggering of an aperiodic SRS within the channel occupancy time, or any combinations thereof.

公开(公告)号：US12302247B2

公开(公告)日：2025-05-13

申请号：US17769129

申请日：2020-11-04

Applicant: Qualcomm Incorporated

Inventor： Ananta Narayanan Thyagarajan ,  Sreekanth Dama ,  Tanumay Datta ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Jing Sun ,  Ozcan Ozturk ,  Shashidhar Vummintala ,  Gowrisankar Somichetty ,  Pravjyot Singh Deogun ,  Ahmed Zaki

IPC: H04W52/02 ,  H04W16/14 ,  H04W76/28

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for improving communications between a user equipment (UE) and a base station in a shared radio frequency spectrum while the UE is operating in a discontinuous reception (DRX) mode. In particular, the UE may be configured to adapt operation in a DRX mode based on whether a base station has access to a shared radio frequency spectrum. For example, the UE may adjust a length of an on-duration for monitoring for a data transmission from the base station, adjust a periodicity for monitoring for control information from the base station, determine whether to keep monitoring for wake-up signaling from the base station, etc. based on whether the base station has access to the shared radio frequency spectrum. Further techniques for improving operation in a DRX mode are also described.

公开(公告)号：US11968670B2

公开(公告)日：2024-04-23

申请号：US17039335

申请日：2020-09-30

Applicant: QUALCOMM Incorporated

Inventor： Tanumay Datta ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Jing Sun

IPC: H04W72/21 ,  H04L5/00 ,  H04L27/26 ,  H04W72/1263

CPC classification number: H04W72/21 ,  H04L5/0016 ,  H04L27/2607 ,  H04W72/1263

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for physical uplink control channel (PUCCH) resource configuration. In one aspect, a base station may schedule a user equipment (UE) for PUCCH transmission based on a time division orthogonal cover code (TD-OCC) or a set of TD-OCCs, a cyclic shift step size or a set of cyclic shift step sizes, a first symbol or a set of first symbols, or a cyclic shift set. The base station may distinguish communications from that UE based on the TD-OCC or set of TD-OCCs, the cyclic shift step size or set of cyclic shift step sizes, the first symbol or set of first symbols, or the cyclic shift set.

公开(公告)号：US11606175B2

公开(公告)日：2023-03-14

申请号：US16926547

申请日：2020-07-10

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Tanumay Datta ,  Ananta Narayanan Thyagarajan ,  Jing Sun ,  Xiaoxia Zhang ,  Zhifei Fan

IPC: H04L5/00 ,  H04W72/12 ,  H04L27/26

Abstract: Certain aspects of the present disclosure provide techniques for enhanced physical uplink control channel (PUCCH) transmission. In some cases, a UE obtains payload bits to be conveyed in a physical uplink control channel (PUCCH) transmission via an interlace of resource blocks (RBs), determines a group of the RBs available to the UE, and transmits the payload bits using the determined group of RBs, wherein the transmitting involves modulating different RBs of the group by at least one of different payload bits or sequences.

公开(公告)号：US11463885B2

公开(公告)日：2022-10-04

申请号：US16914794

申请日：2020-06-29

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tanumay Datta ,  Kapil Bhattad ,  Ananta Narayanan Thyagarajan ,  Xiaoxia Zhang

IPC: H04W16/14 ,  H04W72/04 ,  H04L5/00 ,  H04L25/02 ,  H04L1/00 ,  H04L27/26 ,  H04W8/24 ,  H04W74/08

Abstract: A user equipment (UE) may employ an extended cyclic prefix, a postfix, or both for sounding reference signal (SRS) transmissions, such that gaps between SRS transmissions are long enough for UE antenna switching operations, but shorter in duration than any maximum channel vacancy time durations set by a wireless communications system. Further, UEs may transmit SRSs to base stations in accordance with an SRS configuration. For example, a base station may provide SRS configuration information to a UE that indicates, for example, information related to SRS scheduling, subband information, a cyclic prefix length, a cyclic postfix length, listen-before-talk (LBT) type information, an SRS trigger, an SRS cancellation procedure, or any combinations thereof. Based on such SRS configuration information, a UE may perform partial subband SRS techniques, subband selection techniques, SRS bandwidth adaptation techniques, LBT type configuration techniques, etc.

公开(公告)号：US20210051709A1

公开(公告)日：2021-02-18

申请号：US16993192

申请日：2020-08-13

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Tanumay Datta ,  Jing Sun ,  Xiaoxia Zhang

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

Abstract: Methods, systems, and devices for wireless communications are described that support listen before talk (LBT) for uplink transmissions using multiple subbands. A base station may support communication with a user equipment (UE) via multiple subbands and may transmit an uplink grant to the UE that allocates resources of the multiple subbands for transmission of a shared data channel by the UE. The base station may include an indication within the uplink grant that indicates to the UE to perform a given type of LBT for each subband. After transmitting the uplink grant, the base station may transmit control information or other signaling (e.g., channel occupancy time system information (COT-SI)) that indicates subbands on which the UE is to perform a given type of LBT or other subbands on which the UE is to perform a different type of LBT.

公开(公告)号：US20210051696A1

公开(公告)日：2021-02-18

申请号：US16947257

申请日：2020-07-24

Applicant: QUALCOMM INCORPORATED

Inventor： Kapil Bhattad ,  Ananta Narayanan Thyagarajan ,  Tanumay Datta ,  Jing Sun ,  Xiaoxia Zhang ,  Ozcan Ozturk

IPC: H04W72/12 ,  H04W72/14 ,  H04L5/00 ,  H04W74/08

Abstract: Wireless communications systems and methods related to communications in a network are provided. A user equipment (UE) may generate during a first time period, an uplink (UL) communication signal based on a scheduled grant or a configured UL grant. The UE may detect a downlink (DL) communication from a base station (BS) during a second time period after the first time period. The DL communication is devoid of the scheduled grant and the configured UL grant. The UE may transmit to the BS, the UL communication signal based on the scheduled grant or the configured UL grant in response to detecting the DL communication.

公开(公告)号：US20210007128A1

公开(公告)日：2021-01-07

申请号：US16915686

申请日：2020-06-29

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Tanumay Datta ,  Pravjyot Singh Deogun ,  Xiaoxia Zhang ,  Jing Sun

IPC: H04W72/14 ,  H04W72/12 ,  H04W74/08 ,  H04L5/00 ,  H04W16/14 ,  H04L1/00 ,  H04W28/02

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a set of one or more uplink grants scheduling at least a first uplink transmission and a second uplink transmission during a channel occupancy time of an unlicensed radio frequency spectrum band. The UE may identify a transmission gap between the first uplink transmission and the second uplink transmission of the plurality of uplink transmissions by the UE during the channel occupancy time, the transmission gap exceeding a threshold time. The UE may determine that the transmission gap corresponds to a lost uplink grant. The UE may modify the first uplink transmission or the second uplink transmission based at least in part on the determination that the transmission gap corresponds to the lost uplink grant.

公开(公告)号：US20200187250A1

公开(公告)日：2020-06-11

申请号：US16689963

申请日：2019-11-20

Applicant: QUALCOMM INCORPORATED

Inventor： Kapil Bhattad ,  Xiaoxia Zhang ,  Tanumay Datta ,  Ananta Narayanan Thyagarajan ,  Jing Sun

IPC: H04W74/08 ,  H04W16/14 ,  H04W74/00

Abstract: Wireless communications systems and methods related to constraining no-listen-before-talk (LBT)-based transmissions during link direction switches in a frequency spectrum shared by multiple network operating entities are provided. A first wireless communication device, communicates, with a second wireless communication device, a configuration for determining whether to perform an LBT after a link direction switch. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first link direction during a channel occupancy time (COT) period of the first wireless communication device or the second wireless communication device. The first wireless communication device communicates, with the second wireless communication device, a second communication signal in a second link direction different from the first link direction during the COT period based on the configuration.

公开(公告)号：US12150172B2

公开(公告)日：2024-11-19

申请号：US17654649

申请日：2022-03-14

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Xiaoxia Zhang ,  Tanumay Datta ,  Ananta Narayanan Thyagarajan ,  Jing Sun

IPC: H04W74/0808 ,  H04W16/14 ,  H04W74/00

Abstract: Wireless communications systems and methods are provided. A method of wireless communication may include performing a first listen-before-talk (LBT) procedure associated with a channel, wherein a channel occupancy time (COT) for the channel is acquired based on the first LBT being successful, communicating a first communication signal in a first link direction during the COT, switching from the first link direction to a second link direction different from the first link direction, and communicating after the switching, a second communication signal in the second link direction without performing a second LBT.