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    Low latency uplink power control
    31.
    发明授权
    Low latency uplink power control 有权

    公开(公告)号：US10149255B2

    公开(公告)日：2018-12-04

    申请号：US15085844

    申请日：2016-03-30

    Applicant: QUALCOMM Incorporated

    Inventor： Shimman Arvind Patel ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Michael Mao Wang

    IPC: H04W72/04 ,  H04W52/34 ,  H04W52/36 ,  H04W52/14 ,  H04W52/16 ,  H04W28/06 ,  H04L5/00 ,  H04W52/24 ,  H04L5/14

    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.

    Low latency group acknowledgements
    33.
    发明授权
    Low latency group acknowledgements 有权

    公开(公告)号：US10098099B2

    公开(公告)日：2018-10-09

    申请号：US15005289

    申请日：2016-01-25

    Applicant: QUALCOMM Incorporated

    Inventor： Wanshi Chen ,  Aleksandar Damnjanovic ,  Hao Xu ,  Shimman Arvind Patel ,  Peter Gaal

    IPC: H04J3/00 ,  H04W72/04 ,  H04L1/16 ,  H04L1/18

    Abstract: Certain aspects of the present disclosure provide techniques that may be used for low latency communications. For example, aspects allow a single group acknowledgement to be used to acknowledge a plurality of low latency transmissions. An exemplary method generally includes receiving, from a base station, a plurality of downlink channel transmissions, wherein each of the downlink channel transmissions is sent using a first transmission time interval (TTI) that is reduced relative to a legacy TTI and providing, in a single uplink channel transmission sent using a second TTI that is larger than the first TTI, a group acknowledgement indicating whether or not the downlink channel transmissions were successfully received by a UE.

    Low latency operation with different hybrid automatic repeat request (HARQ) timing options
    39.
    发明授权
    Low latency operation with different hybrid automatic repeat request (HARQ) timing options 有权

    公开(公告)号：US09929834B2

    公开(公告)日：2018-03-27

    申请号：US15087693

    申请日：2016-03-31

    Applicant: QUALCOMM Incorporated

    Inventor： Wanshi Chen ,  Hao Xu ,  Shimman Arvind Patel ,  Peter Gaal

    IPC: H04L1/18 ,  H04W56/00 ,  H04W74/08

    CPC classification number: H04L1/1861 ,  H04L1/1887 ,  H04L1/1896 ,  H04W56/0045 ,  H04W74/0833

    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) or a base station may identify a timing advance parameter and a processing parameter for the UE, and one or both may determine a hybrid automatic repeat request (HARQ) timing based on the identified parameters. For example, if the UE has a large timing advance or reduced processing capacity, a longer HARQ timing may be chosen. When the UE receives downlink (DL) transmissions from the base station, the UE may send an acknowledgement (ACK) or negative acknowledgement (NACK) based on the chosen HARQ timing. The base station may send a retransmission (in the case of a NACK) based on the HARQ timing. In some cases, the UE may request a specific HARQ timing, or request an updated timing advance. If HARQ synchronization is lost, the UE and the base station may default to a preconfigured HARQ timing.

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