LOW LATENCY PHYSICAL UPLINK CONTROL CHANNEL WITH SCHEDULING REQUEST AND CHANNEL STATE INFORMATION

    公开(公告)号:US20190110312A1

    公开(公告)日:2019-04-11

    申请号:US16215360

    申请日:2018-12-10

    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station may use low latency communications to improve the throughput of a wireless link. To facilitate efficient low latency communication, the UE may send UE-initiated CSI reports in addition to periodic and base station-initiated reports. For example, the UE may, in various examples, send UE-initiated CSI reports using contention based spectrum, using a request-to-transmit, or using a CSI differential (i.e., an indicator of a change in channel conditions). The base station may schedule different UEs for uplink low latency communication by providing resources to each UE for CSI and scheduling requests (SRs) using coherent or non-coherent uplink transmissions. The CSI and SR may also be combined with uplink feedback.

    LOW LATENCY PHYSICAL UPLINK CONTROL CHANNEL WITH SCHEDULING REQUEST AND CHANNEL STATE INFORMATION

    公开(公告)号:US20190069316A1

    公开(公告)日:2019-02-28

    申请号:US16158182

    申请日:2018-10-11

    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station may use low latency communications to improve the throughput of a wireless link. To facilitate efficient low latency communication, the UE may send UE-initiated CSI reports in addition to periodic and base station-initiated reports. For example, the UE may, in various examples, send UE-initiated CSI reports using contention based spectrum, using a request-to-transmit, or using a CSI differential (i.e., an indicator of a change in channel conditions). The base station may schedule different UEs for uplink low latency communication by providing resources to each UE for CSI and scheduling requests (SRs) using coherent or non-coherent uplink transmissions. The CSI and SR may also be combined with uplink feedback.

    UPLINK CONTROL CHANNEL FOR LOW LATENCY COMMUNICATIONS

    公开(公告)号:US20190069288A1

    公开(公告)日:2019-02-28

    申请号:US16174102

    申请日:2018-10-29

    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device such as a user equipment (UE) or a base station may identify a set of resource element groups (REGs) for low latency communication, and each REG may include a portion of a different resource block (RB) of a set of RBs (e.g., a set of non-contiguous RBs). The device may then map an uplink control channel to the selected REGs and communicate on the uplink control channel accordingly. Reference signals may also be transmitted in the same RBs, and the REGs may be mapped around the resources used for reference signals. In some cases, multiple UEs may transmit uplink control data using the same resources using code division multiplexing (CDM) (e.g., if the control payload is relatively small). In other cases, multiple UEs may be frequency division multiplexed (FDM).

    Techniques for communicating feedback in low latency wireless communications

    公开(公告)号:US10182452B2

    公开(公告)日:2019-01-15

    申请号:US15458293

    申请日:2017-03-14

    Abstract: Various aspects described herein are related to communicating feedback communications received over multiple component carriers (CCs) in wireless communications. The communications can be received from a serving node over the multiple CCs configured in carrier aggregation or multiple connectivity. One or more of the multiple CCs can be determined for transmitting feedback regarding the communications received over at least one CC of the multiple CCs, wherein the one or more of the multiple CCs are selected for transmitting the feedback based at least in part on a transmission time interval (TTI) duration for the at least one CC. Feedback related to receiving the communications from the serving node over the at least one CC can be transmitted over the one or more of the multiple CCs.

    Wideband low latency communication
    85.
    发明授权

    公开(公告)号:US10172130B2

    公开(公告)日:2019-01-01

    申请号:US15293664

    申请日:2016-10-14

    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device configured for carrier aggregation may communicate using transport blocks (TBs) mapped according to a wideband configuration that includes resources of multiple component carriers (CCs) within a single, low latency transmission time interval (TTI)—e.g., a TTI that has a shorter duration relative to other TTIs used in the same system. The number of CCs, and thus bandwidth, available for mapping each TB may change dynamically based on the configuration of the CCs. For a CC configured with a control region during a given low latency TTI, a TB sent during that low latency TTI may not be mapped to resources of that CC. In other cases, portions of a CC configured with a control region may be used for wideband configurations. Wideband low latency communications may be used on the uplink or downlink communications, or both.

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