中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

31 records (took 0.026 seconds)

    RADIO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION SYSTEM
    21.
    发明申请
    RADIO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION SYSTEM 审中-公开

    公开(公告)号：US20170094681A1

    公开(公告)日：2017-03-30

    申请号：US15310894

    申请日：2015-05-13

    Applicant: NTT DOCOMO, INC.

    Inventor： Kazuki Takeda ,  Hiroki Harada ,  Jing Wang ,  Liu Liu ,  Yu Jiang ,  Huiling Jiang

    IPC: H04W72/12 ,  H04W74/08 ,  H04L27/26 ,  H04W16/14

    CPC classification number: H04W72/1289 ,  H04L27/2613 ,  H04W16/14 ,  H04W74/0816 ,  H04W88/06 ,  H04W88/10

    Abstract: A radio base station is disclosed to communicate with a user terminal that is capable of using a licensed band and an unlicensed band and has a control section that controls the transmission of downlink signals in the unlicensed band using LBT (Listen Before Talk), a selection section that selects the symbol to execute LBT, randomly, with equal probability, from a plurality of candidate symbols, and an acquiring section that acquires a measurement result, in which the received signal intensity in the LBT period is measured, wherein when the control section judges that the channel of the unlicensed band is in an idle state from the measurement result of received signal intensity, the control section executes control so that a beacon reference signal is transmitted in all of the candidate symbols that follow the symbol in which LBT was executed.

    Radio base station, user terminal, radio communication method and radio communication system
    22.
    发明授权
    Radio base station, user terminal, radio communication method and radio communication system 有权
    无线基站，用户终端，无线通信方式和无线通信系统

    公开(公告)号：US09532367B2

    公开(公告)日：2016-12-27

    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 ,  H04B7/02 ,  H04B7/06 ,  H04L1/00 ,  H04W72/00 ,  H04L1/16

    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。

    USER EQUIPMENT AND BASE STATION
    23.
    发明申请
    USER EQUIPMENT AND BASE STATION 有权
    用户设备和基站

    公开(公告)号：US20160013849A1

    公开(公告)日：2016-01-14

    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: H04B7/04

    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. One aspect of the present invention relates to a user equipment comprising: a transmission and reception unit configured to communicate a radio signal with a base station in accordance with MIMO (Multiple Input Multiple Output) transmission; a codebook storage unit configured to store predefined codebooks to specify precoding matrices for use in the MIMO transmission, wherein the codebooks are arranged to represent phase information and gain information; a channel measurement unit configured to measure channel conditions based on reference signals transmitted from multiple antennas in the base station; and a codebook selection unit configured to select a codebook to be indicated to the base station from the stored codebooks based on the measured channel conditions and instruct the transmission and reception unit to indicate feedback information to the base station, wherein 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。 本发明的一个方面涉及一种用户设备，包括：发送和接收单元，被配置为根据MIMO（多输入多输出）传输与基站的无线电信号; 码本存储单元，被配置为存储预定码本，以指定在MIMO传输中使用的预编码矩阵，其中所述码本被布置为表示相位信息和增益信息; 信道测量单元，被配置为基于从所述基站中的多个天线发送的参考信号来测量信道状况; 以及码本选择单元，被配置为基于所测量的信道条件从所存储的码本中选择要向基站指示的码本，并且指示发送和接收单元向基站指示反馈信息，其中反馈信息包括码本 用于识别所选码本的索引。

    USER TERMINAL AND RADIO COMMUNICATION METHOD
    25.
    发明申请
    USER TERMINAL AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20190116005A1

    公开(公告)日：2019-04-18

    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 ,  H04W72/04 ,  H04W16/14 ,  H04W74/08 ,  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, RADIO BASE STATION AND RADIO COMMUNICATION METHOD
    26.
    发明申请
    USER TERMINAL, RADIO BASE STATION AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20180302795A1

    公开(公告)日：2018-10-18

    申请号：US15578788

    申请日：2016-06-03

    Applicant: NTT DOCOMO, INC.

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

    IPC: H04W16/14 ,  H04W16/32 ,  H04W72/04

    Abstract: The present invention is designed to reduce the decrease of throughput in cells in which pre-transmission listening is employed (for example, unlicensed bands). A user terminal communicates by using at least a first cell in which listening is executed before signals are transmitted, and has a receiving section that receives DL signals that contain UL transmission commands, and a control section that controls UL transmission based on the UL transmission commands, and the control section controls whether or not to apply listening to UL transmission based on DL signals transmitted in the first cell.

Patent Agency Ranking