中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

336 records (took 0.027 seconds)

    SYSTEM ACQUISITION IN A SHARED RADIO FREQUENCY SPECTRUM BAND
    182.
    发明申请
    SYSTEM ACQUISITION IN A SHARED RADIO FREQUENCY SPECTRUM BAND 审中-公开

    公开(公告)号：US20180343676A1

    公开(公告)日：2018-11-29

    申请号：US15987511

    申请日：2018-05-23

    Applicant: QUALCOMM Incorporated

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

    IPC: H04W74/08 ,  H04W16/14 ,  H04W56/00

    Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems utilizing shared radio frequency spectrum bands, base stations may operate in different listen before talk (LBT) modes. For example, a base station may operate in an LBT enabled mode or a non-LBT enabled mode. A UE may perform system acquisition with the base station based on receiving acquisition signals (e.g., synchronization signals and physical broadcast channel (PBCH) signals) from the base station. These acquisition signals may depend on the LBT mode of the base station. For example, the frame timing and number of subframes for the acquisition signals may be based on the LBT mode of the base station. In some cases, a base station may adaptively switch LBT modes, and the UE may re-synchronize with the base station based on an LBT configuration period or a paging message from the base station.

    UNLICENSED SPECTRUM OPERATION FOR NARROWBAND INTERNET OF THINGS AND ENHANCED MACHINE TYPE COMMUNICATION
    183.
    发明申请
    UNLICENSED SPECTRUM OPERATION FOR NARROWBAND INTERNET OF THINGS AND ENHANCED MACHINE TYPE COMMUNICATION 审中-公开

    公开(公告)号：US20180070243A1

    公开(公告)日：2018-03-08

    申请号：US15644517

    申请日：2017-07-07

    Applicant: QUALCOMM Incorporated

    Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Chirag Patel ,  Tamer Kadous ,  Hao Xu

    IPC: H04W16/14 ,  H04W74/08 ,  H04W4/00 ,  H04L5/14 ,  H04W76/04

    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and base station may communicate using narrow band internet of things (NB-IoT) techniques or enhanced machine type communication (eMTC) in unlicensed spectrum. The UE may be an eMTC device or another device capable of communication without user direction. The UE may identify a geographic region and select a communication mode that is consistent with regulatory restrictions in that region. For example, in some cases, the communication mode may be based on using time division duplexing (TDD), using frequency hopping, or performing a listen-before-talk (LBT) procedure at the base station. A frame structure for TDD may include LBT subframes, uplink portions, downlink portions, and special subframes for switching. The base station may perform LBT procedures in the LBT subframes. If frequency hopping is enabled, a configurable number of TDD frames may be grouped into a hopping frame block.

    Cyclic prefix (CP) extension in channel occupancy time (COT) sharing for sidelink communication
    184.
    发明授权
    Cyclic prefix (CP) extension in channel occupancy time (COT) sharing for sidelink communication 有权

    公开(公告)号：US12295035B2

    公开(公告)日：2025-05-06

    申请号：US17906509

    申请日：2020-04-16

    Applicant: QUALCOMM Incorporated

    Inventor： Jing Sun ,  Xiaoxia Zhang ,  Changlong Xu ,  Chih-Hao Liu ,  Ozcan Ozturk ,  Yisheng Xue

    IPC: H04W74/0816 ,  H04L27/26 ,  H04W72/25 ,  H04W74/08

    Abstract: Wireless communications systems and methods related to use of cyclic prefix (CP) extensions for channel occupancy time (COT) sharing among sidelink user equipment devices (UEs) are provided. A first UE detects a first sidelink transmission in a COT, the COT for sharing with multiple sidelink UEs including the first sidelink UE. The first UE may determine a CP extension length for transmitting a second sidelink transmission after the first sidelink transmission, where a gap duration between the first sidelink transmission and the second sidelink transmission satisfies a listen-before-talk (LBT) gap time threshold. The first UE may apply a CP extension having the CP extension length to the second sidelink transmission and transmit, to a second sidelink UE, the second sidelink transmission with the CP extension.

    Enhanced downlink control information detection
    185.
    发明授权
    Enhanced downlink control information detection 有权

    公开(公告)号：US12238786B2

    公开(公告)日：2025-02-25

    申请号：US17943851

    申请日：2022-09-13

    Applicant: QUALCOMM Incorporated

    Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

    IPC: H04L27/26 ,  H04L5/00 ,  H04W74/0833 ,  H04W76/27

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform a transmission detection procedure on each base station before combining control information. The UE may use demodulation reference signals (DMRS) as a detection mechanism. If the UE detects a DMRS from a base station, the UE may determine that a control resource set associated with the base station is valid for combining. If the UE does not detect DMRS from the base station, the UE may refrain from combining control information from the base station. In another example, base stations that pass a listen-before-talk (LBT) procedure may transmit a preamble before transmitting control information. A preamble may carry a preamble sequence associated with a specific control resource set. The UE may identify a preamble sequence and determine that the corresponding control resource set is valid for control information combining.

    Resource reservation for sidelink communications in shared radio frequency spectrum
    188.
    发明授权
    Resource reservation for sidelink communications in shared radio frequency spectrum 有权

    公开(公告)号：US12200501B2

    公开(公告)日：2025-01-14

    申请号：US17406804

    申请日：2021-08-19

    Applicant: QUALCOMM Incorporated

    Inventor： Chih-Hao Liu ,  Yisheng Xue ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Peter Gaal ,  Juan Montojo

    IPC: H04W16/14 ,  H04W72/20 ,  H04W74/0808

    Abstract: Methods, systems, and devices for wireless communications are described in which a first user equipment (UE) may transmit a first communication to a second UE during a first channel occupancy time (COT). The first UE may reserve resources of one or more subsequent COTs for one or more repetitions of the first communication. The reserved resources may be identified based at least in part on a two stage resource reservation, in which reserved resources are identified relative to a timing of the one or more subsequent COTs. Such a UE may first determine a timing of a second COT and may then determine a timing of the reserved resources based on the timing of the second COT. The reserved resources may be identified based at least in part on one or more offsets from a starting time of the second COT.

    Resource block grid alignment at sidelink nodes
    189.
    发明授权
    Resource block grid alignment at sidelink nodes 有权

    公开(公告)号：US12177843B2

    公开(公告)日：2024-12-24

    申请号：US17704910

    申请日：2022-03-25

    Applicant: QUALCOMM Incorporated

    Inventor： Chih-Hao Liu ,  Jing Sun ,  Yisheng Xue ,  Xiaoxia Zhang

    IPC: H04W72/20

    Abstract: Methods, systems, and devices for wireless communications are described to support resource block (RB) grid alignment at user equipments (UE) in sidelink communications. In a first example, communicating UEs may support different RB grids and a receiving UE may attempt multiple decoding hypotheses for receiving a sidelink control channel from a transmitting UE, where each hypothesis may correspond to a different RB grid. In a second example, an RB grid for a sidelink control channel may be common, or aligned, for a transmitting UE and a receiving UE, such that the receiving UE may receive the sidelink control channel using the common RB grid. In a third example, demodulation reference signals (DMRSs) and resource element (RE) rate matching for a sidelink control channel may be common, or aligned, for a transmitting UE and a receiving UE, such that the receiving UE may receive the control channel using the aligned DMRSs.

Patent Agency Ranking