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    TRANSMISSION DEVICE AND TRANSMISSION METHOD
    14.
    发明申请
    TRANSMISSION DEVICE AND TRANSMISSION METHOD 有权
    传输设备和传输方法

    公开(公告)号：US20140056206A1

    公开(公告)日：2014-02-27

    申请号：US13970448

    申请日：2013-08-19

    Applicant: NTT DOCOMO, INC.

    Inventor： Kenichi Higuchi ,  Yoshihisa Kishiyama ,  Mamoru Sawahashi

    IPC: H04L27/26

    CPC classification number: H04L27/2607 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/2605 ,  H04L27/2626 ,  H04W72/005

    Abstract: A disclosed OFDM-based transmission device includes a unicast channel generating unit configured to generate a unicast channel; an MBMS channel generating unit configured to generate an MBMS channel; a multiplexing unit configured to time-division-multiplex the unicast channel and the MBMS channel in the same frequency band; and a transmitting unit configured to transmit time-division-multiplexed transmission symbols. In the disclosed transmission device, the guard interval length for the MBMS channel is set longer than the guard interval length for the unicast channel.

    Abstract translation: 所公开的基于OFDM的传输设备包括被配置为生成单播信道的单播信道生成单元; MBMS信道生成部，生成MBMS信道; 复用单元，被配置为在同一频带中对单播信道和MBMS信道进行时分复用; 以及发送单元，被配置为发送时分复用的发送符号。 在所公开的发送装置中，MBMS信道的保护间隔长度被设定为比单播信道的保护间隔长度长。

    MOBILE STATION, BASE STATION, UPLINK TRANSMISSION METHOD, AND DOWNLINK TRANSMISSION METHOD
    15.
    发明申请
    MOBILE STATION, BASE STATION, UPLINK TRANSMISSION METHOD, AND DOWNLINK TRANSMISSION METHOD 审中-公开
    移动站，基站，上行链路传输方法和下行链路传输方法

    公开(公告)号：US20130223413A1

    公开(公告)日：2013-08-29

    申请号：US13856869

    申请日：2013-04-04

    Applicant: NTT DOCOMO, INC.

    Inventor： Teruo Kawamura ,  Yoshihisa Kishiyama ,  Kenichi Higuchi ,  Mamoru Sawahashi

    IPC: H04W72/04

    CPC classification number: H04W72/0446 ,  H04L1/0026 ,  H04L1/0079 ,  H04L1/1671 ,  H04L5/006 ,  H04L25/0228 ,  H04L27/2647

    Abstract: A mobile station includes a channel quality estimation unit configured to estimate downlink channel quality based on a reference signal from a base station and to output the estimated downlink channel quality as channel estimation information; an acknowledgement information determining unit configured to determine whether a downlink data channel from the base station is correctly received and to output the determination result as acknowledgement information; and an acknowledgement information prioritizing unit configured to cause the acknowledgement information to be preferentially transmitted to the base station if transmission timings of the channel estimation information and the acknowledgement information coincide.

    Abstract translation: 移动站包括：信道质量估计单元，被配置为基于来自基站的参考信号估计下行链路信道质量，并将所估计的下行链路信道质量作为信道估计信息输出; 确认信息确定单元，被配置为确定来自所述基站的下行链路数据信道是否被正确接收，并将所述确定结果输出为确认信息; 以及确认信息优先化单元，被配置为如果所述信道估计信息和所述确认信息的发送定时一致，则使所述确认信息优先地发送到所述基站。

    Transmission device and transmission method
    17.
    发明授权
    Transmission device and transmission method 有权
    传输装置及传输方式

    公开(公告)号：US08976723B2

    公开(公告)日：2015-03-10

    申请号：US13970448

    申请日：2013-08-19

    Applicant: NTT DOCOMO, INC.

    Inventor： Kenichi Higuchi ,  Yoshihisa Kishiyama ,  Mamoru Sawahashi

    IPC: H04H20/71 ,  H04W4/00 ,  H04L27/26 ,  H04L1/00 ,  H04L5/00 ,  H04W72/00

    CPC classification number: H04L27/2607 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/2605 ,  H04L27/2626 ,  H04W72/005

    Abstract: A disclosed OFDM-based transmission device includes a unicast channel generating unit configured to generate a unicast channel; an MBMS channel generating unit configured to generate an MBMS channel; a multiplexing unit configured to time-division-multiplex the unicast channel and the MBMS channel in the same frequency band; and a transmitting unit configured to transmit time-division-multiplexed transmission symbols. In the disclosed transmission device, the guard interval length for the MBMS channel is set longer than the guard interval length for the unicast channel.

    Abstract translation: 所公开的基于OFDM的传输设备包括被配置为生成单播信道的单播信道生成单元; MBMS信道生成部，生成MBMS信道; 复用单元，被配置为在同一频带中对单播信道和MBMS信道进行时分复用; 以及发送单元，被配置为发送时分复用的发送符号。 在所公开的发送装置中，MBMS信道的保护间隔长度被设定为比单播信道的保护间隔长度长。

    Radio base station, user terminal and radio communication method
    18.
    发明授权
    Radio base station, user terminal and radio communication method 有权

    公开(公告)号：US10251166B2

    公开(公告)日：2019-04-02

    申请号：US14765965

    申请日：2014-01-22

    Applicant: NTT DOCOMO, INC.

    Inventor： Yoshihisa Kishiyama ,  Anass Benjebbour ,  Yuuya Saitou ,  Kenichi Higuchi

    IPC: H04W72/04 ,  H04W16/28 ,  H04L5/00 ,  H04W72/08 ,  H04B7/06 ,  H04B7/0452

    Abstract: The present invention is designed to improve spectral efficiency in a radio communication system which can use non-orthogonal multiple access (NOMA). Steps are provided in which a radio base station configures one of a plurality of transmission mode including a first transmission mode, which groups a plurality of transmission methods including a transmission method to employ non-orthogonal multiple access (NOMA) and multiple-user multiple-input and multiple-output (MU-MIMO), and a second transmission mode, which groups a plurality of transmission methods including a transmission method to employ this NOMA and open-loop transmit diversity, and transmits a downlink signal for this user terminal based on the configured transmission mode.

    Mobile communication system, base station apparatus, user equipment, and method
    19.
    发明授权
    Mobile communication system, base station apparatus, user equipment, and method 有权

    公开(公告)号：US09479313B2

    公开(公告)日：2016-10-25

    申请号：US14031960

    申请日：2013-09-19

    Applicant: NTT DOCOMO, INC.

    Inventor： Nobuhiko Miki ,  Mamoru Sawahashi ,  Kenichi Higuchi

    IPC: H04W4/00 ,  H04L5/00 ,  H04L1/16 ,  H04L1/18 ,  H04L27/34

    Abstract: A base station apparatus is used in a mobile communication system in which at least a shared data channel is transmitted by an orthogonal modulation scheme using an I-channel and a Q-channel. The base station apparatus includes a providing unit providing Acknowledgement/Non-Acknowledgement information indicating whether retransmission of a signal received in uplink is required; a mapping unit mapping a number of multiplexed users of the Acknowledgement/Non-Acknowledgement information to the I-channel or the Q-channel based on a predetermined mapping table; and a reporting unit reporting the Acknowledgement/Non-Acknowledgement information to the respective users. The mapping table indicates that, when the number of the multiplexed users is equal to or less than a predetermined number, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel or the Q-channel, and otherwise, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel and the Q-channel.

    RADIO BASE STATION, USER TERMINAL, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM
    20.
    发明申请
    RADIO BASE STATION, USER TERMINAL, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM 审中-公开
    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：US20150349866A1

    公开(公告)日：2015-12-03

    申请号：US14655526

    申请日：2013-12-25

    Applicant: NTT DOCOMO, INC.

    Inventor： Anass Benjebbour ,  Yoshihisa Kishiyama ,  Kenichi Higuchi

    IPC: H04B7/06 ,  H04L25/02 ,  H04W72/08 ,  H04W72/04

    CPC classification number: H04B7/0617 ,  H04B7/0626 ,  H04B7/0632 ,  H04L5/00 ,  H04L5/0048 ,  H04L25/0224 ,  H04L25/0228 ,  H04L25/03898 ,  H04W16/28 ,  H04W24/10 ,  H04W72/042 ,  H04W72/082

    Abstract: The present invention is designed to provide a radio base station, a user terminal, a radio communication method and a radio communication system of novel structures that can achieve improved throughput and system capacity. A radio base station transmits downlink reference signals that are specific to a plurality of transmission beams, a plurality of user terminals feed back channel state information acquired by channel estimation using the downlink reference signals, to the radio base station, the radio base station determines a plurality of user terminals to non-orthogonal-multiplex, per transmission beam, based on the channel state information that is fed back, and non-orthogonal-multiplexes downlink signals for the plurality of user terminals that are determined, in each of the plurality of transmission beams, and a plurality of user terminals that are determined, after having canceled interference between the transmission beams by means of a linear filter, demodulates downlink signals for the subject terminal, from the downlink signals that are non-orthogonal-multiplexed in each transmission beam.

    Abstract translation: 本发明旨在提供能够实现提高的吞吐量和系统容量的新颖结构的无线电基站，用户终端，无线电通信方法和无线电通信系统。 无线基站向无线基站发送特定于多个发送波束的下行链路参考信号，多个用户终端将使用下行链路参考信号的信道估计获取的信道状态信息反馈给无线基站， 多个用户终端，基于反馈的信道状态信息对每个发送波束进行非正交多路复用，并且对多个用户终端中的每一个中确定的多个用户终端的下行链路信号进行非正交复用 发送波束和多个用户终端，在通过线性滤波器消除发送波束之间的干扰之后，从在每次发送中被非正交多路复用的下行链路信号中解调对象终端的下行链路信号 光束。

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