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    BASE STATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND COMMUNICATION METHOD
    12.
    发明申请
    BASE STATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND COMMUNICATION METHOD 有权

    公开(公告)号：US20170180157A1

    公开(公告)日：2017-06-22

    申请号：US15116137

    申请日：2015-01-28

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Kenji MIYAMOTO ,  Shigeru KUWANO ,  Jun TERADA ,  Takayoshi TASHIRO

    IPC: H04L25/02 ,  H04B17/309 ,  H04W52/42 ,  H04B7/0413 ,  H04B7/024 ,  H04B17/373

    CPC classification number: H04L25/0204 ,  H04B7/022 ,  H04B7/024 ,  H04B7/0413 ,  H04B17/309 ,  H04B17/373 ,  H04W52/42

    Abstract: A base station apparatus is provided with at least one remote unit apparatus each including at least one antenna, and a central unit apparatus connected to each remote unit apparatus via a transmission path. The antenna provided in the remote unit apparatus receives a transmission signal wirelessly transmitted from at least one wireless terminal each including at least one antenna. The remote unit apparatus includes a channel estimation unit that estimates channel information between the antenna of the wireless terminal and the antenna of the remote unit apparatus, using a reception signal received by the antenna provided in the remote unit apparatus, a likelihood calculation unit that calculates likelihood of each transmission signal included in the reception signal, for each antenna provided in the remote unit apparatus, using the channel information estimated by the channel estimation unit, and an inter-unit transmission unit that transmits likelihood information calculated by the likelihood calculation unit to the central unit apparatus. The central unit apparatus is provided with an inter-unit receiving unit that receives the likelihood information transmitted from the inter-unit transmission unit, and a signal detection unit that combines the likelihood information received by the inter-unit receiving unit, and outputs a signal corresponding to each transmission signal transmitted from the wireless terminal, using combined likelihood information.

    WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD
    14.
    发明申请
    WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20180048439A1

    公开(公告)日：2018-02-15

    申请号：US15552724

    申请日：2016-03-03

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Kenji MIYAMOTO ,  Shigeru KUWANO ,  Jun TERADA

    IPC: H04L5/00 ,  H04L27/26 ,  H04B7/024

    CPC classification number: H04L5/0035 ,  H04B7/024 ,  H04B7/08 ,  H04L27/2601 ,  H04W16/28 ,  H04W28/16

    Abstract: A wireless communication system includes distributed units communicating with a terminal device and a central unit connected to the distributed units and receiving and processing signals from the distributed units. The central unit includes a host function unit to pre-notify the distributed units if a received signal from the terminal device is a target of coordination between distributed units, hard/soft determination units configured to separate received signals from the distributed units into a hard decision value and a soft decision value based on presence or absence of coordination between the distributed units, transmit the hard decision value to the host function unit as is, and transmit the soft decision value to a signal combining unit, the signal combining unit combines soft decision values output from the hard/soft determination units and outputs a combined soft decision value, and a decoding unit performs decoding using the soft decision value output from the signal combining unit.

    SIGNAL TRANSFER SYSTEM AND SIGNAL TRANSFER METHOD
    16.
    发明申请
    SIGNAL TRANSFER SYSTEM AND SIGNAL TRANSFER METHOD 有权

    公开(公告)号：US20250097161A1

    公开(公告)日：2025-03-20

    申请号：US18727916

    申请日：2022-02-25

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Kenji MIYAMOTO ,  Yoshihito SAKAI ,  Tatsuya SHIMADA

    IPC: H04L47/283 ,  H04W28/06

    Abstract: According to an aspect of the present invention, there is provided a signal transfer system that transfers a signal from one communication device to another communication device, the signal transfer system including an information acquisition unit that acquires network transfer information that is information regarding a traffic flow for each traffic flow from the one communication device to the other communication device; and a communication control unit that executes an adjustment process that is a process of reducing a waiting time for a frame on the basis of the network transfer information acquired by the information acquisition unit.

    TRANSMISSION SYSTEM, SWITCHING CONTROL APPARATUS, SWITCHING CONTROL METHOD AND PROGRAM
    17.
    发明申请
    TRANSMISSION SYSTEM, SWITCHING CONTROL APPARATUS, SWITCHING CONTROL METHOD AND PROGRAM 有权

    公开(公告)号：US20250081270A1

    公开(公告)日：2025-03-06

    申请号：US18697561

    申请日：2021-10-04

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Yuka OKAMOTO ,  Tatsuya SHIMADA ,  Yoshihito SAKAI ,  Hirotaka UJIKAWA ,  Kenji MIYAMOTO ,  Hiroko NOMURA

    IPC: H04W76/20 ,  H04W28/02 ,  H04W28/08 ,  H04W72/52

    Abstract: A switching control apparatus calculates a traffic amount in a predetermined period of each first transmission apparatus that is a transmission apparatus of a predetermined layer on the basis of allocation of radio resources to a terminal that wirelessly transmits a signal to a lowermost transmission apparatus among a plurality of transfer apparatuses that constitute a communication network hierarchized into a plurality of layers and transfer a received signal to a layer next above. The switching control apparatus calculates a processing capability predicted to be required for each second transmission apparatus which is a transmission apparatus of a layer next above the first transmission apparatus on the basis of the traffic amount of the first transmission apparatus. The switching control apparatus instructs a transfer apparatus for transferring a signal transmitted from the first transmission apparatus to the second transmission apparatus to switch a connection destination of the first transmission apparatus under the control of the second transmission apparatus in which congestion is determined to occur on the basis of the processing capability.

    COMMUNICATION SYSTEM AND COMMUNICATION CONTROL APPARATUS
    18.
    发明申请
    COMMUNICATION SYSTEM AND COMMUNICATION CONTROL APPARATUS 有权

    公开(公告)号：US20250007844A1

    公开(公告)日：2025-01-02

    申请号：US18691690

    申请日：2021-10-12

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Kenji MIYAMOTO ,  Yoshihito SAKAI ,  Tatsuya SHIMADA

    IPC: H04L47/22 ,  H04W28/02 ,  H04W28/22

    Abstract: Provided is a communication system comprising: at least one base station accommodating a wireless terminal; at least one transfer device which transfers, to a higher level, an uplink communication of the wireless terminal received via the base station; and a transfer device controller which controls the at least one transfer device, and the communication system further includes: an information acquisition unit for acquiring information regarding a wireless communication for each quality-of-service class between the base station and the wireless terminal; a rate determination unit for determining, for each of the quality-of-service classes, a shaping rate for traffic shaping such that a packet loss caused by congestion does not occur, on the basis of the information regarding the wireless communication for each quality-of-service class; and a communication control unit for executing, for each quality-of-service class, the traffic shaping at the higher level to the base station on the basis of the shaping rate determined by the rate determination unit.

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