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    RANDOM ACCESS CHANNEL PROCEDURES WITH MULTIPLE CARRIERS
    62.
    发明申请
    RANDOM ACCESS CHANNEL PROCEDURES WITH MULTIPLE CARRIERS 有权

    公开(公告)号：US20210127428A1

    公开(公告)日：2021-04-29

    申请号：US17142622

    申请日：2021-01-06

    Applicant: QUALCOMM Incorporated

    Inventor： Sony Akkarakaran ,  Tao Luo ,  Makesh Pravin John Wilson ,  Sumeeth Nagaraja ,  Xiao Feng Wang ,  Kaushik Chakraborty ,  Wooseok Nam ,  Shengbo Chen ,  Juan Montojo

    IPC: H04W74/08 ,  H04W74/00 ,  H04L5/00

    Abstract: Methods, systems, and devices for wireless communication are described. Wireless communications systems may support uplink random access channel (RACH) transmissions on multiple beams and over multiple component carriers (CCs). A wireless device may transmit a random access preamble to a base station in a first RACH transmission, which may indicate a set of CCs over which the base station may respond with a random access response (RAR) in a second RACH transmission. The second RACH transmission may then include an indication for which CCs the wireless device may use for a subsequent RACH transmission (e.g., a RACH message 3). The wireless device may also indicate a beam index and/or time-frequency resources associated with beams and/or CCs used for such cell acquisition transmissions. In other examples, the base station may indicate resources (e.g., via a handover command or RACH command) for wireless device scheduling request and/or beam-failure recovery request transmission.

    Cross-sub-band quasi co-location signaling
    67.
    发明授权
    Cross-sub-band quasi co-location signaling 有权

    公开(公告)号：US10554262B2

    公开(公告)日：2020-02-04

    申请号：US15975995

    申请日：2018-05-10

    Applicant: QUALCOMM Incorporated

    Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Sony Akkarakaran ,  Rahul Malik ,  Kaushik Chakraborty

    IPC: H04B7/0408 ,  H04B7/0413 ,  H04W72/04 ,  H04B7/08 ,  H04B7/06

    Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a first sub-band and a second sub-band of a system bandwidth for communication with a user equipment (UE). The base station may determine a spatial quasi co-location (QCL) relationship between the first sub-band and the second sub-band and may transmit signaling to the UE that indicates the determined spatial QCL relationship. Upon receiving the signaling, the UE may derive, based on the indicated spatial QCL relationship, spatial parameters (e.g., beam width, pointing angle, etc.) for communication with the base station via the second sub-band. The spatial parameters may be derived based on spatial parameters used for reception of a downlink transmission from the base station via the first sub-band. Subsequently, the UE may communicate with the base station via the second sub-band using the derived spatial parameters.

    LISTEN-BEFORE-TALK OPERATION IN AN UNLICENSED DOWNLINK AND LICENSED UPLINK DEPLOYMENT
    69.
    发明申请
    LISTEN-BEFORE-TALK OPERATION IN AN UNLICENSED DOWNLINK AND LICENSED UPLINK DEPLOYMENT 审中-公开

    公开(公告)号：US20190335504A1

    公开(公告)日：2019-10-31

    申请号：US16384732

    申请日：2019-04-15

    Applicant: QUALCOMM Incorporated

    Inventor： Kaushik Chakraborty ,  Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

    IPC: H04W74/08 ,  H04W16/14

    Abstract: Methods, systems, and devices for wireless communications are described. In systems supporting unlicensed downlink and licensed uplink communications, transmitter-based and/or receiver-based listen-before-talk may be implemented. In a transmitter-based scheme, a base station performs listen-before-talk on a downlink unlicensed band to monitor for signals from other base stations. In a first receiver-based scheme, a user equipment may send a clear to send signal on the licensed uplink channel or unlicensed downlink channel to assist a listen-before-talk operation at a serving base station. In a second receiver-based scheme, the user equipment monitors for downlink preamble transmissions from base stations other than a serving base station and reports detected preambles to the serving base station. The base station may schedule the user equipment based on the reported preambles. In some cases, the serving base station may signal other base stations to back off and reduce interference on the unlicensed downlink spectrum.

    BEAM REFINEMENT TECHNIQUES IN MILLIMETER WAVE SYSTEMS
    70.
    发明申请
    BEAM REFINEMENT TECHNIQUES IN MILLIMETER WAVE SYSTEMS 审中-公开

    公开(公告)号：US20190089443A1

    公开(公告)日：2019-03-21

    申请号：US16118284

    申请日：2018-08-30

    Applicant: QUALCOMM Incorporated

    Inventor： Rahul Malik ,  Srinivas Yerramalli ,  Tamer Kadous ,  Kaushik Chakraborty

    IPC: H04B7/06 ,  H04B7/0404

    Abstract: Methods, systems, and devices for wireless communications are described that provide for refinement of receive beam beamforming parameters at a user equipment (UE). A UE may transmit two or more signals in an uplink transmission that have different beamforming parameters. A base station receiving the uplink transmission may measure the two or more signals, and identify a first signal of the two or more signals based at least in part on the measuring. The base station may inform the UE of the identified first signal, which the UE may use to set receive beam beamforming parameters for one or more subsequent downlink transmissions.

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