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    Apparatus, method, system, program and recording medium related to beamforming
    1.
    发明授权
    Apparatus, method, system, program and recording medium related to beamforming 有权

    公开(公告)号：US11516711B2

    公开(公告)日：2022-11-29

    申请号：US17077238

    申请日：2020-10-22

    Applicant: NEC CORPORATION

    Inventor： Kengo Oketani ,  Hisashi Futaki

    IPC: H04W36/00 ,  H04B7/06 ,  H04W16/28 ,  H04W36/08

    Abstract: [Object] To make it possible to further increase a possibility of a success in a handover.
    [Solution] A first apparatus of the present invention includes: a first communication processing unit configured to transmit reference signals using beamforming; and a second communication processing unit configured to receive a handover message from a source base station of a handover of a terminal apparatus. The handover message includes beam related information related to a beam. The first communication processing unit is configured to receive an access signal of the terminal apparatus based on the beam related information.

    Base station, terminal, radio communication system, radio communication method
    2.
    发明授权
    Base station, terminal, radio communication system, radio communication method 有权

    公开(公告)号：US10999836B2

    公开(公告)日：2021-05-04

    申请号：US15561528

    申请日：2016-01-05

    Applicant: NEC CORPORATION

    Inventor： Kengo Oketani

    IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04W28/06 ,  H04W88/02

    Abstract: A base station capable of reducing subframe overhead and improving throughput is provided. A base station (10) communicates with terminals (20-0 to 20-3). The base station (10) includes: a controller (12) configured to set, in a variable manner, for each subframe, a cyclic prefix length of a cyclic prefix part to be inserted into the subframe; and a communication unit (11) configured to transmit identification information for identifying the cyclic prefix length set in the subframe by the controller (12) to a terminal to which the subframe has been allocated.

    Mobile station, base station, methods for transmitting and receiving power headroom report, and computer readable medium
    3.
    发明授权
    Mobile station, base station, methods for transmitting and receiving power headroom report, and computer readable medium 有权

    公开(公告)号：US10206182B2

    公开(公告)日：2019-02-12

    申请号：US14761385

    申请日：2013-08-20

    Applicant: NEC Corporation

    Inventor： Kengo Oketani

    IPC: H04W52/36 ,  H04W72/04 ,  H04L5/00

    Abstract: A mobile station (1) has a capability to communicate with a base station (2) simultaneously using activated first and second uplink carriers. The mobile station (1) is configured to transmit a power headroom report to the base station (2). The power headroom report includes an information element (ΔPPUSCH) indicating a power difference between first maximum transmission power of the mobile station (1) for the first uplink carrier and second maximum transmission power of the mobile station (1) for the second uplink carrier. It is thus, for example, possible to provide improvement of power headroom reporting (PHR) suitable for uplink carrier aggregation.

    WIRELESS COMMUNICATION APPARATUS AND HARQ RESPONSE TRANSMISSION AND RECEPTION METHODS
    4.
    发明申请
    WIRELESS COMMUNICATION APPARATUS AND HARQ RESPONSE TRANSMISSION AND RECEPTION METHODS 审中-公开
    无线通信设备和HARQ响应传输和接收方法

    公开(公告)号：US20150172007A1

    公开(公告)日：2015-06-18

    申请号：US14419024

    申请日：2013-04-09

    Applicant: NEC Corporation

    Inventor： Kengo Oketani

    IPC: H04L1/18 ,  H04L1/00 ,  H04W72/04 ,  H04B7/04

    CPC classification number: H04L1/1893 ,  H04B7/04 ,  H04B7/0413 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/1812 ,  H04L1/1861 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0055 ,  H04W72/0413

    Abstract: The quality of the transmission of HARQ-ACK/NACKs has to be higher in a MIMO multilayer communication system. In one embodiment, a wireless communication apparatus (10) includes a wireless communication unit (11) and a signal processing unit (12). The wireless communication unit (11) is configured to transmit plural multiple-input multiple-output (MIMO) layers using multiple antennas. The signal processing unit 12 is configured to map hybrid automatic repeat request (HARQ) responses onto some layers of the MIMO layers with a relatively high modulation and coding scheme (MCS), so that the HARQ responses are transmitted using only the some layers with a relatively high MCS.

    Abstract translation: 在MIMO多层通信系统中HARQ-ACK / NACK的传输质量必须更高。 在一个实施例中，无线通信装置（10）包括无线通信单元（11）和信号处理单元（12）。 无线通信单元（11）被配置为使用多个天线发送多个多输入多输出（MIMO）层。 信号处理单元12被配置为利用相对较高的调制和编码方案（MCS）将混合自动重复请求（HARQ）响应映射到MIMO层的某些层上，使得HARQ响应仅使用一些层 比较高的MCS。

    Communication device, communication system, and control method
    10.
    发明授权
    Communication device, communication system, and control method 有权

    公开(公告)号：US10397805B2

    公开(公告)日：2019-08-27

    申请号：US15555269

    申请日：2016-03-22

    Applicant: NEC CORPORATION

    Inventor： Sadafuku Hayashi ,  Kengo Oketani

    IPC: H04W4/00 ,  H04W16/32 ,  H04W36/02 ,  H04W72/04 ,  H04W76/12 ,  H04W76/15 ,  H04W76/30 ,  H04W76/27 ,  H04L1/16 ,  H04W80/08

    Abstract: In a method for transferring packet data remaining in a first SeNB to a second SeNB via an MeNB, use of a communication line is inefficient. A base station in a communication system that includes a master cell base station, a secondary cell base station, a core network, and a terminal device, wherein: the base station has a reception unit for receiving, from the master cell base station, downlink user data received from the core network by the master cell base station, and a transmission unit for transmitting the downlink user data received to the terminal device; the reception unit receives, from the master cell base station, switching information indicating that the base station from which the master cell base station receives downlink user data is to be switched; and the transmission unit transmits remaining data to the secondary base station when the reception unit has received the switching information.

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