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    Devices and methods for ELAA multi-carrier LBT
    21.
    发明授权
    Devices and methods for ELAA multi-carrier LBT 有权

    公开(公告)号：US11937302B2

    公开(公告)日：2024-03-19

    申请号：US17887223

    申请日：2022-08-12

    Applicant: Apple Inc.

    Inventor： Jeongho Jeon ,  Abhijeet Bhorkar ,  Seunghee Han ,  Hwan-Joon Kwon

    IPC: H04W74/08 ,  H04W74/00 ,  H04L1/1812

    CPC classification number: H04W74/0816 ,  H04W74/006 ,  H04L1/1812 ,  H04W74/0808

    Abstract: Devices, methods, user equipment (UE), evolved node B (eNB), and storage media are described suitable for coexistence operations for uplink communications on multiple unlicensed carriers. Various embodiments are implemented in LTE systems with license-assisted access (LAA) associated communications. In one embodiment, a UE processes one or more uplink grants from an eNB scheduling transmissions on multiple unlicensed carriers at a first time, and indicating a first channel access procedure. The UE then selects a first unlicensed carrier and performs the first channel access procedure, and performs a second channel access procedure on a second unlicensed carrier of the multiple unlicensed carriers.

    Energy detection threshold adaptation for licensed assisted access of LTE in unlicensed band
    24.
    发明授权
    Energy detection threshold adaptation for licensed assisted access of LTE in unlicensed band 有权

    公开(公告)号：US11178575B2

    公开(公告)日：2021-11-16

    申请号：US16745814

    申请日：2020-01-17

    Applicant: Apple Inc.

    Inventor： Abhijeet Bhorkar ,  Laurent Cariou ,  Hwan Joon Kwon

    IPC: H04W28/18 ,  H04W74/08 ,  H04W16/14

    Abstract: When performing a contention protocol, such as Listen-Before-Talk (LBT), an Long Term Evolution (LTE)-Licensed Assisted Access (LAA) node dynamically adapts the ED threshold used by the LTE-LAA node depending on whether other transmission nodes are detected at the frequency components that are to be used by the LTE-LAA node. In one implementation, the ED threshold value may initially be set to a conservative value, and when other transmissions nodes are not detected, the ED threshold value may be set to a more aggressive value. In another implementation, the ED threshold value may initially be set to a more aggressive value, and only when another transmission node is detected, the ED threshold value may be set to a more conservative value. In yet another possible implementation, the ED threshold value and the transmit power may be proportionally modified, for a particular UE, based on a parameter associated with the UE.

    Scheduling uplink transmissions for a user equipment (UE)
    25.
    发明授权
    Scheduling uplink transmissions for a user equipment (UE) 有权

    公开(公告)号：US11064521B2

    公开(公告)日：2021-07-13

    申请号：US15761397

    申请日：2016-10-17

    Applicant: APPLE INC.

    Inventor： Abhijeet Bhorkar ,  Hwan-Joon Kwon ,  Jeongho Jeon ,  Qiaoyang Ye

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

    Abstract: transmissions outside a transmission opportunity (TxOP) is disclosed. The UE can process an uplink (UL) opportunity received from an eNodeB during a defined transmission opportunity (TxOP). The UL opportunity can schedule UL information to be transmitted from the UE on one or more UL subframes that are outside the defined TxOP. The UE can initiate a listen-before-talk (LBT) procedure to be performed before the UL information is transmitted from the UE on the one or more UL subframes that are outside the defined TxOP. The UE can process the UL information for transmission to the eNodeB on the one or more UL subframes located outside the defined TxOP.

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