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    User equipment and method of SRS transmission
    2.
    发明授权
    User equipment and method of SRS transmission 有权

    公开(公告)号：US11121837B2

    公开(公告)日：2021-09-14

    申请号：US16483314

    申请日：2018-02-02

    Applicant: NTT DOCOMO, INC. ,  DOCOMO Innovations, Inc.

    Inventor： Yuichi Kakishima ,  Ryosuke Osawa ,  Kazuaki Takeda ,  Satoshi Nagata

    IPC: H04L5/00 ,  H04B7/0417 ,  H04B7/06

    Abstract: A user equipment (UE) is disclosed including a receiver that receives Sounding Reference Symbol (SRS) configuration information that indicates a first resource used for transmission of a predetermined reference signal from a base station (BS). The UE includes a transmitter that transmits an SRS using a second resource that is the first resource. The UE further includes a processor that determines a precoder applied to the SRS based on the predetermined reference signal. The transmitter transmits the SRS precoded using the determined precoder. The predetermined reference signal is a Channel State Information Reference Signal (CSI-RS), an SRS, or a Synchronization Signal Block (SSB)/Physical Broadcast Channel (PBCH).

    Method of acquiring channel state information (CSI), user equipment (UE), and transmission and reception point (TRP)
    4.
    发明授权
    Method of acquiring channel state information (CSI), user equipment (UE), and transmission and reception point (TRP) 有权

    公开(公告)号：US11159269B2

    公开(公告)日：2021-10-26

    申请号：US16610818

    申请日：2018-05-03

    Applicant: NTT DOCOMO, INC. ,  DOCOMO INNOVATIONS, INC.

    Inventor： Yuichi Kakishima ,  Chongning Na ,  Satoshi Nagata

    IPC: H04L1/00 ,  H04L5/00 ,  H04W72/04 ,  H04W80/02

    Abstract: A method of acquiring Channel State Information (CSI) includes transmitting, from a Transmission and Reception Point (TRP) to a User Equipment (UE), information indicating that both of a Resource setting and a CSI reporting setting are commonly set to activation or deactivation. The Resource setting being set to the activation causes the UE to assume that CSI-Reference Signals (RSs) are to be transmitted from the TRP. The CSI reporting setting being set to the activation triggers the UE to perform CSI reporting. The method further includes receiving, with the UE, the CSI-RSs transmitted in accordance with a predetermined type of time domain behavior when the Resource setting is set to the activation. The method further includes performing, with the UE, the CSI reporting in accordance with the predetermined type of time domain behavior when the CSI reporting setting is set to activation.

    USER EQUIPMENT AND WIRELESS COMMUNICATION METHOD
    5.
    发明申请
    USER EQUIPMENT AND WIRELESS COMMUNICATION METHOD 有权

    公开(公告)号：US20210297211A1

    公开(公告)日：2021-09-23

    申请号：US16482726

    申请日：2018-02-02

    Applicant: NTT DOCOMO, INC. ,  DOCOMO INNOVATIONS, INC.

    Inventor： Yuichi Kakishima ,  Chongning Na ,  Kazuaki Takeda ,  Satoshi Nagata

    IPC: H04L5/00

    Abstract: A user equipment (UE) is disclosed including a receiver that receives multiple Channel State Information Reference Signals (CSI-RSs) transmitted from a base station (BS) using first resources; wherein each of the multiple CSI-RSs is associated with each of the first resources. The UE includes a processor that performs resource selection in which at least a second resource is selected from the first resources. The UE includes a transmitter that transmits, to the BS, a first indicator that indicates the second resource. When the processor determines that the first resources are out-of-range in the resource selection, the first indicator indicates that the first resources are out-of-range.

    METHOD OF CODEWORD MAPPING AND TRANSMISSION AND RECEPTION POINT
    6.
    发明申请
    METHOD OF CODEWORD MAPPING AND TRANSMISSION AND RECEPTION POINT 有权

    公开(公告)号：US20210288761A1

    公开(公告)日：2021-09-16

    申请号：US16610837

    申请日：2018-05-03

    Applicant: NTT DOCOMO, INC. ,  DOCOMO INNOVATIONS, INC

    Inventor： Yuichi Kakishima ,  Kazuki Takeda ,  Yosuke Sano ,  Lihui Wang ,  Satoshi Nagata

    IPC: H04L1/18 ,  H04W72/04

    Abstract: A method of codeword (CW) mapping in a wireless communication system includes determining, with a Transmission and Reception Point (TRP), order of resources mapped to the CW, and mapping, with the TRP, the CW to resources in accordance with the determined order. The order of resources is determined based on a frequency resource, a time resource, and a layer. The determining determines the order based on a type of re¬ transmission control. The type of re-transmission control is CW-level Hybrid Automatic Repeat Request (HARQ) and code block group (CBG)-level HARQ. When the CW-level HARQ is applied, the determining determines the order as order of the layer, the frequency resource, and the time resource. When the CBG-level HARQ is applied, the determining determines the order as order of the frequency resource, the layer, and the time resource.

    Method of acquiring channel state information
    7.
    发明授权
    Method of acquiring channel state information 有权

    公开(公告)号：US10892808B2

    公开(公告)日：2021-01-12

    申请号：US16476522

    申请日：2018-01-05

    Applicant: NTT DOCOMO, INC. ,  DOCOMO INNOVATIONS, INC.

    Inventor： Yuichi Kakishima ,  Chongning Na ,  Satoshi Nagata ,  Kazuaki Takeda

    IPC: H04L5/00 ,  H04B7/06

    Abstract: A method of acquiring Channel State Information (CSI) in a wireless communication system includes transmitting, from a Base Station (BS) to a User Equipment (UE), a resource setting including time-domain behavior of CSI-Reference Signals (RSs) transmission that designates aperiodic, periodic, or semi-persistent; and transmitting, from the BS to the UE, the CSI-RSs based on the designated aperiodic, periodic, or semi-persistent. The resource setting includes precoding information that indicates whether precoders applied to the CSI-RSs is the same or different. The resource setting includes periodicity and a timing offset value of the CSI-RS transmission when the periodic or the semi-persistent is designated. The resource setting includes frequency-domain information that designates a wideband or a partial band used for the CSI-RS transmission. The resource setting includes a transmission bandwidth of the CSI-RS transmission when the partial band is designated.

    WIRELESS COMMUNICATION METHOD
    9.
    发明申请
    WIRELESS COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20200007287A1

    公开(公告)日：2020-01-02

    申请号：US16337799

    申请日：2017-09-28

    Applicant: NTT DOCOMO, INC. ,  DOCOMO INNOVATIONS, INC.

    Inventor： Yuichi Kakishima ,  Chongning Na ,  Satoshi Nagata

    IPC: H04L5/00 ,  H04W72/04 ,  H04W76/27 ,  H04J1/02 ,  H04J13/16

    Abstract: A wireless communication method includes transmitting, from a base station (BS) to a user equipment (UE), information indicating a resource designated as a Zero-Power (ZP) Reference Signal (RS) or an Interference Measurement Resource (IMR) dynamically, and receiving, with the UE, the ZP RS or the IMR from the BS using the information. The BS transmits the information using at least one of Downlink Control information (DCI) and a Media Access Control (MAC) Control Element (CE). Each of a plurality of Resource Blocks (RBs) includes the resource and part of the plurality of RBs include the resources that are frequency-multiplexed. The wireless communication method further includes notifying, with the BS, the UE of frequency-multiplexing information indicating the part of the plurality of RBs. The UE receives the ZP RS or the IMR using the frequency-multiplexing information.

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