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    Information transmission method, base station and mobile station equipment
    1.
    发明专利
    Information transmission method, base station and mobile station equipment 有权

    公开(公告)号：JP5345254B2

    公开(公告)日：2013-11-20

    申请号：JP2013016736

    申请日：2013-01-31

    Applicant: 株式会社エヌ・ティ・ティ・ドコモ

    Inventor： 秀和 田岡 ,  信彦 三木 ,  祥久 岸山

    IPC: H04W72/04 ,  H04J1/00

    Abstract: PROBLEM TO BE SOLVED: To achieve efficient broadband transmission by employing carrier aggregation. SOLUTION: The information transmission method uses multiple different carriers, where the bandwidth for system use includes a first carrier and a second carrier. The method comprises the steps of: assigning system control information to the first carrier only and assigning a shared channel to one or both of the first carrier and the second carrier; and transmitting the system control information via the first carrier and transmitting the shared channel via one or both of the first carrier and the second carrier. COPYRIGHT: (C)2013,JPO&INPIT

    Base station apparatus, transmission method, the mobile station apparatus and a receiving method
    2.
    发明专利
    Base station apparatus, transmission method, the mobile station apparatus and a receiving method 有权

    公开(公告)号：JP5318771B2

    公开(公告)日：2013-10-16

    申请号：JP2009536040

    申请日：2008-09-29

    Applicant: 株式会社エヌ・ティ・ティ・ドコモ

    Inventor： 秀和 田岡 ,  衛 佐和橋

    IPC: H04B7/10

    CPC classification number: H04B7/0615 ,  H04B7/086

    Abstract: A base station communicating using multiple antennas includes a direction-of-arrival (DOA) estimation unit configured to estimate a direction of arrival based on a signal from a mobile station and to output direction-of-arrival information regarding the estimated direction of arrival; a DOA information multiplexing unit configured to multiplex the direction-of-arrival information from the direction-of-arrival estimation unit with a shared data channel to be transmitted to the mobile station; and an antenna weight multiplying unit configured to multiply a signal to be transmitted to the mobile station and including the shared data channel multiplexed with the direction-of-arrival information by antenna weights obtained based on the direction-of-arrival information from the direction-of-arrival estimation unit.

    Radio base station apparatus, mobile station apparatus, wireless communication method and a wireless communication system
    3.
    发明专利
    Radio base station apparatus, mobile station apparatus, wireless communication method and a wireless communication system 有权

    公开(公告)号：JP5309254B2

    公开(公告)日：2013-10-09

    申请号：JP2012172202

    申请日：2012-08-02

    Applicant: 株式会社エヌ・ティ・ティ・ドコモ

    Inventor： 祥久 岸山 ,  秀和 田岡 ,  衛 佐和橋

    IPC: H04J99/00 ,  H04J1/00 ,  H04J11/00 ,  H04J13/18

    Abstract: PROBLEM TO BE SOLVED: To provide a wireless base station device and a wireless communication method, capable of communicating wirelessly using a downlink reference signal configuration suitable to make a virtual antenna. SOLUTION: The communication system comprises: a plurality of transmission antennas; and a wireless base station device 200 which generates CRS used for demodulating at least downlink control information, CQI-RS, generated for the respective transmission antennas, and used for measuring channel quality, and DM-RS, generated for respective streams, and used for demodulating downlink transmitted data, and transmits CRS, CQI-RS, and DM-RS by multiplexing in a same transmission time unit from the respective antennas. A mobile station device 100 demodulates by separating first to third reference signals from a signal received with a downlink. COPYRIGHT: (C)2013,JPO&INPIT

    Code book generating method
    10.
    发明专利
    Code book generating method 有权

    公开(公告)号：JP5275280B2

    公开(公告)日：2013-08-28

    申请号：JP2010074732

    申请日：2010-03-29

    Applicant: 株式会社エヌ・ティ・ティ・ドコモ

    Inventor： 秀和 田岡 ,  哲士 阿部 ,  イブラヒム カシャバ カリム ,  勝利 楠目

    IPC: H04J99/00 ,  H04B7/04

    Abstract: PROBLEM TO BE SOLVED: To generate a codebook where a precoding matrix allowing a mobile station device to effectively separate signals regardless of the level of correlation between antennas of a base station device.SOLUTION: In a case where a codebook constituted of a DFT codebook selected when antenna correlation in a base station device is high and a random codebook selected when the antenna correlation is low is generated, when selecting a precoding matrix included in the random codebook is selected by arithmetic processing of an inter-matrix distance (Chordal distance), two different precoding matrices included in the DFT codebook are excluded from operands.

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