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    USER TERMINAL, RADIO BASE STATION AND RADIO COMMUNICATION METHOD
    31.
    发明申请
    USER TERMINAL, RADIO BASE STATION AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20180255566A1

    公开(公告)日：2018-09-06

    申请号：US15970111

    申请日：2018-05-03

    Applicant: NTT DOCOMO, INC.

    Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang

    IPC: H04W72/12 ,  H04W72/14 ,  H04L5/00

    Abstract: A user terminal is disclosed that is configurable with a plurality of component carriers. The user terminal has a receiver that receives at least one of downlink control information and Radio Resource Control (RRC) signaling, a transmitter that transmits uplink control information (UCI), which includes at least delivery acknowledgment information, in a specific resource, by using a specific Physical Uplink Control Channel (PUCCH) format (PF), and a processor that executes control to select the specific PF and the specific resource based on a payload size of at least a part of the UCI.

    USER TERMINAL AND RADIO BASE STATION
    33.
    发明申请
    USER TERMINAL AND RADIO BASE STATION 审中-公开

    公开(公告)号：US20180139020A1

    公开(公告)日：2018-05-17

    申请号：US15572817

    申请日：2016-05-13

    Applicant: NTT DOCOMO, INC.

    Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang

    IPC: H04L5/00 ,  H04W72/12 ,  H04W72/04

    Abstract: The present invention is designed so that communication can be carries out adequately even when the number of component carriers that can be configured in a user terminal is expanded from that in existing systems. According to one aspect of the present invention, a user terminal communicates by using a plurality of component carriers (CCs), and has a data buffering section that stores uplink data, a generating section that generates a BSR MAC CE (Medium Access Control Control Element), in which a given index corresponding to a buffer size is included, based on BSR (Buffer Status Report) tables, in which amounts of uplink data that is stored (buffer sizes) and indices are associated, and a transmission section that transmits the BSR MAC CE, and one of the BSR tables is a first BSR table for use when more than five CCs are configured in the user terminal.

    USER TERMINAL, RADIO BASE STATION AND RADIO COMMUNICATION METHOD
    34.
    发明申请
    USER TERMINAL, RADIO BASE STATION AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20180115387A1

    公开(公告)日：2018-04-26

    申请号：US15564762

    申请日：2016-04-08

    Applicant: NTT DOCOMO, INC.

    Inventor： Kazuaki Takeda ,  Liu Liu ,  Huiling Jiang ,  Qin Mu

    IPC: H04L1/00 ,  H04W72/04

    CPC classification number: H04L1/0003 ,  H04B7/02 ,  H04L1/0009 ,  H04L1/08 ,  H04L1/1896 ,  H04W72/042

    Abstract: The present invention is designed to reduce the decrease of spectral efficiency even when repetitious transmission is applied to communication by user terminals, in which the bandwidth to use is limited to partial narrow bandwidths in a system bandwidth. According to one aspect of the present invention, a user terminal, in which the bandwidth to use is limited to partial narrow bandwidths in a system bandwidth, has a receiving section that receives downlink control information (DCI), which includes information related to a repetition factor, and a control section that judges the repetition factor to apply to the transmission and/or receipt of a predetermined signal based on the information related to the repetition factor, wherein the information related to the repetition factor is selected in association with the MCS (Modulation and Coding Scheme) that is applied to the predetermined signal.

    Blind decoding method, radio base station, user terminal and radio communication system
    37.
    发明授权
    Blind decoding method, radio base station, user terminal and radio communication system 有权

    公开(公告)号：US09763240B2

    公开(公告)日：2017-09-12

    申请号：US14399982

    申请日：2013-05-10

    Applicant: NTT DOCOMO, INC.

    Inventor： Kazuaki Takeda ,  Qin Mu ,  Liu Liu ,  Lan Chen

    IPC: H04W72/04 ,  H04B7/06 ,  H04L5/00

    CPC classification number: H04W72/042 ,  H04B7/0617 ,  H04B7/0619 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0094

    Abstract: The blind decoding method disclosed herein is a blind decoding method to allow a user terminal to blind-decode downlink control information that is transmitted from a radio base station using at least one of a legacy PDCCH and an enhanced PDCCH that is frequency-division-multiplexed with a PDSCH, and includes the steps in which the radio base station reports information for configuring a number of candidates, which information is used to configure numbers of search space candidates for the legacy PDCCH and numbers of search space candidates for the enhanced PDCCH, to the user terminal, and the user terminal blind-decodes the downlink control information based on the numbers of search space candidates for the legacy PDCCH and the numbers of search space candidates for the enhanced PDCCH that are configured based on the candidate quantity configuration information.

    User terminal, radio base station and communication control method
    38.
    发明授权
    User terminal, radio base station and communication control method 有权

    公开(公告)号：US09693291B2

    公开(公告)日：2017-06-27

    申请号：US14908916

    申请日：2014-07-08

    Applicant: NTT DOCOMO, INC.

    Inventor： Hiroki Harada ,  Liu Liu ,  Lan Chen

    IPC: H04W4/00 ,  H04W48/16 ,  H04W48/12 ,  H04W16/32 ,  H04W84/04 ,  H04W36/00

    CPC classification number: H04W48/16 ,  H04W16/32 ,  H04W36/0072 ,  H04W48/12 ,  H04W84/045

    Abstract: The present invention is designed to allow more reliable small cell detection while preventing the increase of power consumption in user terminals. The communication control method of the present invention includes the steps in which a macro base station notifies a user terminal of measurement gap pattern information to represent a repetition period that is the same as the transmission cycle of a detection/measurement signal in small cells and a length of time that is the same as the transmission duration of the detection/measurement signal, and the start offset of the transmission duration, and the user terminal configures measurement gaps of the repetition period and the length of time, by using a start offset that is the same as the start offset.

    CENTRAL CONTROL STATION, RADIO BASE STATION AND RADIO COMMUNICATION CONTROL METHOD
    39.
    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。

    Radio communication system, radio base station apparatus, user terminal and radio communication method
    40.
    发明授权
    Radio communication system, radio base station apparatus, user terminal and radio communication method 有权
    无线通信系统，无线基站装置，用户终端和无线通信方式

    公开(公告)号：US09439182B2

    公开(公告)日：2016-09-06

    申请号：US14356312

    申请日：2012-11-08

    Applicant: NTT DOCOMO, INC.

    Inventor： Kazuaki Takeda ,  Liu Liu ,  Lan Chen ,  Qin Mu ,  Wenbo Wang

    IPC: G01R31/08 ,  H04W72/04 ,  H04L1/18 ,  H04W72/12 ,  H04L5/14 ,  H04L5/00

    CPC classification number: H04W72/042 ,  H04L1/18 ,  H04L1/1812 ,  H04L1/1822 ,  H04L1/1887 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/14 ,  H04W72/1289

    Abstract: The present invention is designed to prevent the decrease of capacity even when the ratio of uplink subframes and downlink subframes is changed in each component carrier in TDD carrier aggregation. With the radio communication method according to the present invention, a radio base station apparatus generates a downlink control channel signal containing downlink control information including carrier indicator field information, and transmits the downlink control channel signal to a user terminal, and the user terminal receives the downlink control channel signal and executes signal processing with respect to the downlink signal in accordance with the downlink control information. In this case, the carrier indicator field information is information which associates a carrier index and the number of subframes to schedule victim subframes.

    Abstract translation: 本发明被设计为即使在TDD载波聚合中在每个分量载波中改变上行链路子帧和下行链路子帧的比率时也防止容量的降低。 根据本发明的无线通信方法，无线基站装置生成包含载波指示符字段信息的下行链路控制信息的下行控制信道信号，向用户终端发送下​​行控制信道信号，用户终端接收 下行链路控制信道信号，并且根据下行链路控制信息执行关于下行链路信号的信号处理。 在这种情况下，载波指示符字段信息是将载波索引和子帧数量相关联以调度受害者子帧的信息。

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