公开(公告)号：US11683770B2

公开(公告)日：2023-06-20

申请号：US17337346

申请日：2021-06-02

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Arumugam Chendamarai Kannan ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04J11/00 ,  H04L5/00 ,  H04L27/26 ,  H04W16/14 ,  H04W56/00 ,  H04W72/04 ,  H04W72/27 ,  H04W72/0453

CPC classification number: H04W56/0015 ,  H04J11/0069 ,  H04J11/0073 ,  H04J11/0076 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2614 ,  H04W16/14 ,  H04J2011/0096 ,  H04W72/0453 ,  H04W72/27

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify a first synchronization sequence and generate a second synchronization sequence based at least in part on the first synchronization sequence. The base station may map the first synchronization sequence to a first resource block of a synchronization channel associated with a first frequency sub-band of a shared radio frequency spectrum band and the second synchronization sequence to a second resource block associated with a second frequency sub-band of the synchronization channel. The base station may then transmit the first synchronization sequence and the second synchronization sequence concurrently over the synchronization channel using the first resource block and the second resource block according to the mapping. In some cases, the second synchronization sequence may be generated by applying a first phase shift to the first synchronization sequence.

公开(公告)号：US11678333B2

公开(公告)日：2023-06-13

申请号：US16121228

申请日：2018-09-04

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jing Sun ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/23 ,  H04L5/00 ,  H04W72/0453

CPC classification number: H04W72/23 ,  H04L5/0098 ,  H04W72/0453 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0053

Abstract: Enhancement for bandwidth part (BWP) is disclosed. A base station configures a plurality of BWPs, and activate multiple BWPs for downlink and multiple BWPs for uplink from the plurality of the configured BWPs at a given time. Downlink control information (DCI) that includes BWP activation information can be transmitted on a physical downlink control channel (PDCCH) to a user equipment (UE). The BWP activation information includes a link direction, a schedule of the one or more multiple BWPs for downlink and multiple BWPs for uplink, numerologies, reserved sub-band information, tracking reference signal configuration, or any combination thereof. Correspondingly, a UE receives DCI on a PDCCH that includes BWP activation information, and determines activation of multiple BWPs for downlink and multiple BWPs for uplink at a given time based on the received DCI and its capabilities. Associated enhancement for PDCCH and PDSCH scheduling and LBT procedures are also disclosed.

公开(公告)号：US11677518B2

公开(公告)日：2023-06-13

申请号：US17184209

申请日：2021-02-24

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L5/00 ,  H04L27/10 ,  H04L1/00 ,  H04L27/26 ,  H04J13/00

CPC classification number: H04L5/0035 ,  H04J13/0059 ,  H04L1/0013 ,  H04L1/0069 ,  H04L5/0044 ,  H04L27/103 ,  H04L27/2613 ,  H04L5/0048

Abstract: A receiver is configured to detect a plurality of signals on a plurality of subbands over a communication channel that operates on a shared or an unlicensed spectrum. Additionally, the receiver is configured to perform joint correlation over a time domain and a frequency domain of each successive signal of the plurality of signals. Moreover, the receiver is configured to determine a sequence based on the joint correlation. Additionally, the receiver is configured to decode transmission information from the sequence.

公开(公告)号：US11647496B2

公开(公告)日：2023-05-09

申请号：US16988543

申请日：2020-08-07

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Ahmed Kamel Sadek ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04 ,  H04L27/26 ,  H04W72/1268 ,  H04L1/00 ,  H04L1/1812 ,  H04W74/00 ,  H04L1/1607 ,  H04L5/00 ,  H04L1/1822 ,  H04W28/06 ,  H04W74/08

CPC classification number: H04W72/1215 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/0067 ,  H04L1/1614 ,  H04L1/1819 ,  H04L1/1822 ,  H04L5/0078 ,  H04L5/0094 ,  H04L27/2662 ,  H04W72/0413 ,  H04W72/1268 ,  H04W74/006 ,  H04L1/0003 ,  H04L1/0009 ,  H04W28/06 ,  H04W72/042 ,  H04W74/0808

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：US11582000B2

公开(公告)日：2023-02-14

申请号：US16406469

申请日：2019-05-08

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Srinivas Yerramalli ,  Jing Sun ,  Tamer Kadous

IPC: H04L5/00 ,  H04W74/08 ,  H04L5/14 ,  H04W16/14 ,  H04L27/26 ,  H04L25/02

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a gap period following a downlink portion of a time division duplexing (TDD) frame. The UE may selectively perform, based at least in part on the gap period, a clear channel assessment (CCA) on a channel of a radio frequency spectrum band. The UE may transmit at least one of a sounding reference signal (SRS) or a physical random access channel (PRACH) preamble in a set of initial symbols of an uplink portion of the TDD frame following the gap period, wherein the SRS or PRACH preamble is frequency-domain multiplexed during the set of initial symbols with one or more of: a demodulation reference signal (DMRS), an uplink data transmission, an uplink control transmission, or a random access transmission.

公开(公告)号：US11510244B2

公开(公告)日：2022-11-22

申请号：US16920608

申请日：2020-07-03

Applicant: QUALCOMM Incorporated

Inventor： Qingjiang Tian ,  Jing Sun ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04W72/14 ,  H04L1/00 ,  H04L5/00 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may obtain access to a shared radio frequency spectrum band for a transmission opportunity. The UE may perform an autonomous uplink transmission over the shared radio frequency spectrum band during a first portion of the transmission opportunity. The UE may transmit a physical layer scheduling request comprising a transmission size parameter for a second portion of the transmission opportunity. The UE may receive an uplink grant for the second portion of the transmission opportunity based at least in part on the scheduling request. The UE may perform a scheduled uplink transmission over the shared radio frequency spectrum band during the second portion of the transmission opportunity according to the uplink grant.

公开(公告)号：US20220264640A1

公开(公告)日：2022-08-18

申请号：US17658524

申请日：2022-04-08

Applicant: QUALCOMM Incorporated

Inventor： JING SUN ,  Xiaoxia Zhang ,  Taesang Yoo ,  Tamer Kadous ,  Yongbin Wei ,  Aleksandar Damnjanovic

IPC: H04W74/08 ,  H04W72/14

Abstract: New radio (NR) transmission opportunity (TxOP) structure having flexible starting points are disclosed for wireless communications. When a typical listen before talk (LBT) procedure is performed, the transmitting node will not know ahead of time when the LBT will pass and, thus, when data transmissions can start. NR systems may include a mini-slot design for accommodating transmission units smaller than a slot. Aspects of the present disclosure provide for flexibly increasing the number of potential starting transmission boundaries depending on when the LBT pass is detected. Alternative aspects of the present disclosure determine the potential starting transmission points using a mini-slot based design, a floating slot based design, or a punctured slot based design with a code block group (CBG) level retransmission mechanism.

公开(公告)号：US11388728B2

公开(公告)日：2022-07-12

申请号：US16190927

申请日：2018-11-14

Applicant: QUALCOMM incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Aleksandar Damnjanovic ,  Weiliang Zeng ,  Tamer Kadous ,  Yongbin Wei

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

Abstract: Methods, systems, and devices for wireless communications are described. A transmitter may identify a contention window for a no-energy-detection protocol for determining a channel availability for a data transmission. After the contention window expires, the transmitter may send a request message to a receiver. The receiver may measure a quality of the request message against a request threshold and transmit a response message if the measured quality exceeds the request threshold. The transmitter may then measure a quality of the response message against a response threshold. If the measured quality exceeds the response threshold, the transmitter may initiate a data transmission with the receiver. If the quality falls below the response threshold or the response message is not received, the transmitter may adjust the contention window and reattempt the no-energy-detection protocol. The contention window may also be adjusted based on an acknowledgement message received after the data transmission.

公开(公告)号：US11363630B2

公开(公告)日：2022-06-14

申请号：US16287893

申请日：2019-02-27

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Tamer Kadous ,  Kapil Bhattad ,  Jing Sun

IPC: H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to communicating in a frequency band based on bandwidth parts are provided. A first wireless communication device communicates with a second wireless communication device, a first configuration indicating a plurality of bandwidth parts in a frequency band, the plurality of bandwidth parts based on an expected channel access pattern associated with a listen-before-talk (LBT) in the frequency band. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first bandwidth part of the plurality of bandwidth parts based on an LBT result.

公开(公告)号：US11317443B2

公开(公告)日：2022-04-26

申请号：US17079180

申请日：2020-10-23

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08 ,  H04L5/00 ,  H04L27/00 ,  H04W74/00 ,  H04W72/12 ,  H04W16/14

Abstract: Subband based uplink access for new radio (NR) shared spectrum (NR-SS) is disclosed. A base station performs a listen before talk (LBT) procedure on system allocated subbands of a shared communication channel. The base station determines a first set of candidate subbands that are signaled to a user equipment (UE). The UE performs an LBT procedure on the first set to identify a second set of candidate subbands including the successful LBT subbands of the first set. Aspects of the disclosure provide for managing and refining the subbands for transmissions. A first aspect provides the UE to determine a transmission behavior based on mismatch between the first and second sets. A second aspect provides the first and second sets in handshaking between the base station and UE for refining the eventual transmission set of subbands. A third aspect provides cross-band LBT reporting for further refining subband selection in later slots.