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    User terminal and radio communication method
    3.
    发明授权
    User terminal and radio communication method 有权

    公开(公告)号：US10931407B2

    公开(公告)日：2021-02-23

    申请号：US16089551

    申请日：2017-03-30

    Applicant: NTT DOCOMO, INC.

    Inventor： Hiroki Harada ,  Satoshi Nagata ,  Yu Jiang ,  Liu Liu ,  Huiling Jiang

    IPC: H04L1/18 ,  H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04L1/16 ,  H04W72/14

    Abstract: In scheduling transmission of UL data in a plurality of subframes using single DCI, asynchronous re-transmission control of this UL data is appropriately performed. A user terminal according to an aspect of the present invention includes a receiving section that receives downlink control information (DCI) and a control section that controls transmission of an uplink shared channel in each of a plurality of subframes based on the DCI. The control section determines an HARQ process number (HPN) to use in each of the plurality of subframes based on a HPN field included in the DCI.

    USER TERMINAL AND RADIO COMMUNICATION METHOD
    4.
    发明申请
    USER TERMINAL AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20190124691A1

    公开(公告)日：2019-04-25

    申请号：US16092972

    申请日：2017-04-14

    Applicant: NTT DOCOMO, INC.

    Inventor： Hiroki Harada ,  Satoshi Nagata ,  Liu Liu ,  Yu Jiang

    IPC: H04W74/08 ,  H04W72/04 ,  H04W72/12

    Abstract: To perform listening for uplink transmission at an appropriate timing, on a carrier with setting of listening. A user terminal according to an aspect of the present invention has a transmission section that transmits a signal on a carrier where a listening is performed prior to uplink transmission, a reception section that receives timing information, and a control section that controls execution timing of the listening, on the basis of the timing information.

    User terminal, radio base station and adaptive modulation and coding method
    5.
    发明授权
    User terminal, radio base station and adaptive modulation and coding method 有权

    公开(公告)号：US10136451B2

    公开(公告)日：2018-11-20

    申请号：US15496968

    申请日：2017-04-25

    Applicant: NTT DOCOMO, INC.

    Inventor： Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Yu Jiang ,  Lan Chen

    IPC: H04W4/00 ,  H04W74/00 ,  H04L27/227 ,  H04L27/26 ,  H04W72/04 ,  H04W72/12

    Abstract: In one aspect, the adaptive modulation and coding method includes, in a user terminal, receiving a modulation and coding scheme (MCS) index, acquiring a modulation order corresponding to the received MCS index as a modulation order of a downlink shared channel, from a first table in which MCS indexes are associated with modulation orders including 8 and transport block size (TBS) indexes, and a second table is provided in which MCS indexes are associated with modulation orders of less than 8 and TBS indexes, and the first table is provided by puncturing a combination of a modulation order and a TBS index in the second table so that the first table and the second table are equal in a number of bits for an MCS index. In other aspects, a user terminal and a radio base station are provided.

    RADIO BASE STATION, USER TERMINAL, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM
    7.
    发明申请
    RADIO BASE STATION, USER TERMINAL, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM 有权
    无线基站，用户终端，无线电通信方法和无线电通信系统

    公开(公告)号：US20150109985A1

    公开(公告)日：2015-04-23

    申请号：US14384451

    申请日：2013-03-12

    Applicant: NTT DOCOMO, INC.

    Inventor： Satoshi Nagata ,  Xiang Yun ,  Yu Jiang ,  Lan Chen

    IPC: H04W72/08 ,  H04L1/16 ,  H04W72/00

    CPC classification number: H04W72/085 ,  H04B7/024 ,  H04B7/0623 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/0039 ,  H04L1/1607 ,  H04L1/1657 ,  H04W72/005

    Abstract: The present invention is designed to prevent the decrease of throughput and also reduce the overhead of CSI feedback when CoMP transmission is applied. A radio base station is configured to be able to perform coordinated multiple-point transmission/reception with a user terminal, and includes a detection section configured to detect a retransmission control signal fed back from the user terminal, and a CQI updating section configured to update a CQI for coordinated multiple-point transmission/reception using received quality information in each cell, and the CQI updating section updates the CQI using a calculating formula that is defined with the received quality information in each cell and a variable which changes the value depending on the content of the retransmission control signal.

    Abstract translation: 本发明旨在防止吞吐量的降低，并且还降低了应用CoMP传输时CSI反馈的开销。 无线基站被配置为能够与用户终端进行协调的多点发送/接收，并且包括：检测部，被配置为检测从用户终端反馈的重发控制信号; CQI更新部，被配置为更新 使用每个小区中的接收质量信息进行协调的多点发送/接收的CQI，并且CQI更新部分使用每个小区中接收到的质量信息定义的计算公式来更新CQI，以及根据 重传控制信号的内容。

    CENTRAL CONTROL STATION, RADIO BASE STATION AND RADIO COMMUNICATION CONTROL METHOD
    9.
    发明申请
    CENTRAL CONTROL STATION, RADIO BASE STATION AND RADIO COMMUNICATION CONTROL METHOD 审中-公开
    中央控制站，无线电台站和无线电通信控制方法

    公开(公告)号：US20160269940A1

    公开(公告)日：2016-09-15

    申请号：US15032751

    申请日：2014-10-17

    Applicant: NTT DOCOMO, INC.

    Inventor： Kazuaki Takeda ,  Jing Wang ,  Liu Liu ,  Yu Jiang ,  Huiling Jiang

    IPC: H04W28/16 ,  H04W24/02 ,  H04W88/12

    CPC classification number: H04W28/16 ,  H04W24/02 ,  H04W88/02 ,  H04W88/08 ,  H04W88/12

    Abstract: The present invention is designed to reduce the decrease of system performance when coordinated multi-point transmission is carried out to a user terminal. The central control station of the present invention provides a central control station that is connected with a plurality of radio base stations that carry out coordinated multi-point transmission to a user terminal, and this central control station has a reporting information generating section that generates, for each radio base station, information about radio resources allocated to other radio base stations that carry out coordinated multi-point transmission, and a reporting section that reports the information about the radio resources, generated in the reporting information generating section, to each radio base station.

    Abstract translation: 本发明旨在减少对用户终端进行协调的多点传输时的系统性能的降低。 本发明的中央控制站提供了与向用户终端进行协调的多点传输的多个无线基站连接的中央控制站，该中央控制站具有报告信息生成部， 对于每个无线基站，分配给执行协调的多点传输的其他无线基站的无线资源的信息，以及报告单元，将报告信息生成部生成的关于无线资源的信息报告给各无线基站 站。

    User equipment and base station
    10.
    发明授权
    User equipment and base station 有权
    用户设备和基站

    公开(公告)号：US09391682B2

    公开(公告)日：2016-07-12

    申请号：US14771219

    申请日：2014-02-18

    Applicant: NTT DOCOMO, INC.

    Inventor： Yuichi Kakishima ,  Satoshi Nagata ,  Anass Benjebbour ,  Xiang Yun ,  Yu Jiang ,  Lan Chen ,  Ozgun Bursalioglu

    IPC: H04B7/02 ,  H04B7/04 ,  H04B7/06

    CPC classification number: H04B7/0478 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0473 ,  H04B7/061 ,  H04B7/0617 ,  H04B7/0639

    Abstract: Techniques for providing codebooks extended by gain information that can be transmitted in a reduced amount of signaling are disclosed. A user equipment includes a transmission and reception unit communicating a radio signal with a base station in accordance with MIMO (Multiple Input Multiple Output) transmission and a codebook storage unit stores predefined codebooks to specify precoding matrices for use in the MIMO transmission. The codebooks are arranged to represent phase information and gain information and a channel measurement unit measures channel conditions based on reference signals transmitted from multiple antennas in the base station. A codebook selection unit selects a codebook to be indicated to the base station from the stored codebooks based on the measured channel conditions and instructs the transmission and reception unit to indicate feedback information to the base station and the feedback information includes a codebook index for identifying the selected codebook.

    Abstract translation: 公开了用于提供可以以减少的信令量发送的增益信息进行扩展的码本的技术。 用户设备包括根据MIMO（多输入多输出）传输将无线电信号与基站通信的发送和接收单元，并且码本存储单元存储预定码本，以指定在MIMO传输中使用的预编码矩阵。 码本被布置为表示相位信息和增益信息，并且信道测量单元基于从基站中的多个天线发送的参考信号来测量信道条件。 码本选择单元根据所测量的信道条件从所存储的码本中选择要从基站指示的码本，并且指示发送和接收单元向基站指示反馈信息，并且反馈信息包括用于识别基站的码本索引 所选码本。

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