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    Paging user equipments on a shared communication medium
    182.
    发明授权
    Paging user equipments on a shared communication medium 有权

    公开(公告)号：US10178649B2

    公开(公告)日：2019-01-08

    申请号：US16048218

    申请日：2018-07-27

    Applicant: QUALCOMM Incorporated

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

    IPC: H04W68/02 ,  H04W72/04 ,  H04L5/00 ,  H04W8/00 ,  H04W16/14 ,  H04W28/04

    Abstract: In an embodiment, an apparatus (e.g., eNB) pages UEs on a shared communication. The apparatus obtains paging message(s) for transmission to UEs with different coverage levels. The apparatus transmits an extended common ePDCCH, followed by a paging ePDCCH, followed by repetitive transmissions of the paging message(s) over a plurality of PDSCH subframes. In a further embodiment, the apparatus obtains first and second sets of paging messages for transmission to different paging groups. The apparatus establishes non-overlapping POWs for the first and second paging groups to avoid a paging ePDCCH collision.

    SYSTEM ACQUISITION IN A SHARED RADIO FREQUENCY SPECTRUM BAND
    184.
    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
    185.
    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.

    Rate matching for unlicensed sidelink channel access
    186.
    发明授权
    Rate matching for unlicensed sidelink channel access 有权

    公开(公告)号：US12302393B2

    公开(公告)日：2025-05-13

    申请号：US17840157

    申请日：2022-06-14

    Applicant: QUALCOMM Incorporated

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

    IPC: H04W74/0816 ,  H04L1/00 ,  H04L5/00 ,  H04W72/02 ,  H04W72/0446 ,  H04W72/1263 ,  H04W74/00 ,  H04W74/08

    Abstract: Methods, systems, and devices for wireless communications are described. A transmitting user equipment may receive control information indicative of a plurality of starting symbols in a first slot, the plurality of starting symbols including at least one default starting symbol and one or more subsequent starting symbols, each of the plurality of starting symbols representing a potential starting symbol for transmission, by the transmitting UE, of a sidelink communication. The transmitting UE may perform a listen-before-talk procedure during at least the first slot and may transmit, to a receiving UE and based on performance of the listen-before-talk procedure during at least the first slot, at least an initial portion of the sidelink communication during a selected starting symbols of the plurality of starting symbols, the selected starting symbol being one of the one or more subsequent starting symbols and representing a beginning of a channel occupancy duration.

    Cyclic prefix (CP) extension in channel occupancy time (COT) sharing for sidelink communication
    187.
    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
    188.
    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.

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