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公开(公告)号：EP4318961A1
公开(公告)日：2024-02-07
申请号：EP22774701.1
申请日：2022-02-04
申请人： NTT DOCOMO, INC.
摘要： This terminal includes: a reception unit that receives carrier waves from each of a plurality of base stations that transmit signals in coordination with each other; and a control unit that controls the reception frequency of each carrier wave on the basis of a reference signal included in each carrier wave, and that estimates a signal on the basis of the results of decoding carried out for each carrier wave.
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公开(公告)号：EP4132218A1
公开(公告)日：2023-02-08
申请号：EP21780677.7
申请日：2021-03-25
申请人： NTT DOCOMO, INC.
摘要： A radio communication system includes a radio apparatus that transmits a signal to a terminal, a BB control apparatus that is connected to the radio apparatus and performs BB processing of the signal, and an upper control apparatus that is connected to the BB control apparatus and controls the BB control apparatus, in which the radio communication system has a configuration that allows switching a connection target of one of a plurality of the radio apparatuses between one of a plurality of the BB control apparatuses and another, and/or, a configuration that allows switching a connection target of one of the plurality of BB control apparatuses between one of a plurality of the upper control apparatuses and another.
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公开(公告)号：EP3962144A1
公开(公告)日：2022-03-02
申请号：EP19926598.4
申请日：2019-12-24
申请人： NTT DOCOMO, INC.
IPC分类号： H04W16/28 , H04W16/32 , H04W36/30 , H04B17/309 , H04L27/26 , H04B7/024 , H04B7/026 , H04B7/0413 , H04B7/06 , H04B7/08
摘要： This communication control device is provided with: a control unit which selects at least one cell from among a plurality of cells on the basis of information relating to Doppler shifts estimated from an uplink reference signal of each of the plurality of cells; and a transmitting unit which transmits to the selected cell a control signal for controlling a wireless connection with a terminal. The communication control method includes: selecting at least one cell from among a plurality of cells on the basis of information relating to Doppler shifts estimated from an uplink reference signal of each of the plurality of cells; and transmitting to the selected cell a control signal for controlling a wireless connection with a terminal.
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公开(公告)号：EP3413486A1
公开(公告)日：2018-12-12
申请号：EP17747461.6
申请日：2017-02-01
申请人： NTT DOCOMO, INC.
CPC分类号： H04B7/0695 , H04B7/024 , H04B7/04 , H04B7/0617 , H04B7/0619 , H04B7/063 , H04B7/0632 , H04B7/0645 , H04B7/065 , H04B7/10 , H04B17/24 , H04B17/318 , H04B17/336 , H04B17/345 , H04J11/0053 , H04L5/0073 , H04W16/28 , H04W24/10 , H04W72/0426 , H04W72/046 , H04W72/082
摘要： A user equipment UE includes: a measurer that measures, for each of a plurality of candidate beams, a benchmark pertaining to communication quality; a comparer that compares the benchmark with a first threshold value and a second threshold value; and a feedback unit that transmits the benchmark to the base station as feedback information pertaining to an interference beam if the benchmark is the first threshold value or higher and lower than the second threshold value, transmits the benchmark to the base station as feedback information pertaining to a desired beam if the benchmark is the second threshold value or higher, and transmits no feedback information to the base station if the benchmark is lower than the first threshold value, based on the comparison results of the comparer.
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公开(公告)号：EP3057276B1
公开(公告)日：2018-10-03
申请号：EP14851644.6
申请日：2014-10-08
申请人： NTT DOCOMO, INC.
发明人： SHEN, Jiyun , SUYAMA, Satoshi , OKUMURA, Yukihiko
CPC分类号： H04L27/0014 , H04L2027/0055 , H04L2027/0065 , H04L2027/0083 , H04W16/32
摘要： To actualize frequency synchronization with each of radio communication systems while suppressing increase in circuit scale of a user terminal in an environment in which the user terminal concurrently communicates with a plurality of radio communication systems with different frequencies, a radio base station of the present invention is a radio base station for forming a narrow-area cell to communicate with a user terminal in a radio communication system where the narrow-area cell is provided inside a wide-area cell, and has a carrier frequency synthesizer that generates a carrier frequency of the narrow-area cell based on a wide-area radio signal transmitted from a radio base station for forming the wide-area cell, and a sampling frequency synthesizer that generates a sampling frequency of a baseband signal of the narrow-area cell based on the wide-area radio signal.
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6.发明公开RADIO APPARATUS, RADIO CONTROL APPARATUS AND COMMUNICATION CONTROL METHOD 审中-公开FUNKVORRICHTUNG，FUNKSTEUERUNGSVORRICHTUNG UND KOMMUNIKATIONSSTEUERUNGSVERFAHREN
公开(公告)号：EP3057253A1
公开(公告)日：2016-08-17
申请号：EP14852775.7
申请日：2014-10-02
申请人： NTT DOCOMO, INC.
CPC分类号： H04B7/0413 , H01Q1/246 , H01Q21/28 , H04B7/0617 , H04B7/0634 , H04B10/2575 , H04B10/25758 , H04L27/2607 , H04L27/2634
摘要： To reduce a bandwidth required for an optical transmission path (30) in a base station system including an RAU (21) for performing MIMO transmission using a plurality of antenna elements and a BBU (11), in a communication control method of the present invention, the BBU (11) transmits antenna weight coefficient information indicative of antenna weight coefficients of a plurality of antenna elements (205) and a transmission signal, and the RAU (21) multiplies the transmission signal from the BBU (11) by each of the antenna weight coefficients to generate weighted signals of the plurality of antenna elements (205), and transmits the weighted signals from the plurality of antenna elements (205).
摘要翻译： 为了减少包括用于使用多个天线元件和BBU（11）进行MIMO传输的RAU（21）的基站系统中的光传输路径（30）所需的带宽，在本发明的通信控制方法中 BBU（11）发送表示多个天线元件（205）的天线权重系数的天线权重系数信息和发送信号，RAU（21）将来自BBU（11）的发送信号乘以 天线权重系数以产生多个天线元件（205）的加权信号，并且从多个天线元件（205）发送加权信号。
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公开(公告)号：EP3783942A1
公开(公告)日：2021-02-24
申请号：EP19789151.8
申请日：2019-04-16
申请人： NTT DOCOMO, INC.
发明人： MASHINO, Jun , OKUYAMA, Tatsuki , SUYAMA, Satoshi
IPC分类号： H04W16/28 , H04B7/024 , H04B7/0413 , H04B7/0426 , H04B7/0452 , H04B7/0456 , H04B7/06 , H04J99/00 , H04W28/16
摘要： A base station device includes a reception point that includes a plurality of antennas, and a control section that selects a plurality of terminals that transmit uplink signals to be received while space-division multiplexed by the plurality of antennas. The control section controls a ratio between a number of first terminals and a number of second terminals in selecting the plurality of terminals, the second terminals being terminals whose rate of the uplink signals is higher than a rate of the uplink signals of the first terminals, the ratio being controlled depending on a target transmit power configured for the first terminals.
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公开(公告)号：EP3771114A1
公开(公告)日：2021-01-27
申请号：EP19770927.2
申请日：2019-03-22
申请人： NTT DoCoMo, Inc.
摘要： When base station 100 detects reception of a plurality of transmission requests for data signals identical in content from a plurality of user terminals 200, base station 100 applies, to the data signals to be transmitted to a plurality of user terminals 200, beamforming for covering a plurality of user terminals 200 by at least one transmission beam, and transmits, by the at least one transmission beam, the data signals to which the beamforming has been applied.
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公开(公告)号：EP3413477A1
公开(公告)日：2018-12-12
申请号：EP17747540.7
申请日：2017-02-02
申请人： NTT DOCOMO, INC.
发明人： SUYAMA, Satoshi , OKUMURA, Yukihiko
摘要： A radio communication device includes: a full-digital array that has a first antenna element group including multiple antenna elements and that has no analog variable phase shifter; and a hybrid beamformer that has a second antenna element group including multiple antenna elements and that has an analog variable phase shifter.
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10.发明公开WIRELESS COMMUNICATION SYSTEM, SHARED RECEPTION DEVICE, AND USER TERMINAL 审中-公开革命性神经系统，GEMEINSAM GENUTZTE EMPFANGSVORRICHTUNG UNDBENUTZERENDGERÄT
公开(公告)号：EP3089545A1
公开(公告)日：2016-11-02
申请号：EP14873525.1
申请日：2014-12-26
申请人： NTT DOCOMO, INC.
CPC分类号： H04W72/082 , H04B7/04 , H04B7/0452 , H04B7/0456 , H04B7/0617 , H04B7/0619 , H04L1/0026 , H04L5/0026 , H04L5/006 , H04W16/28 , H04W84/005
摘要： To suppress reduction in system performance for mobile communications (group mobility) in a plurality of terminals existing inside the same moving object, a radio communication system is for a plurality of user terminals existing inside a moving object and a radio base station, the user terminal has a reception section that receives a signal transmitted from the radio base station, and a transmission section that transmits the signal transmitted from the radio base station to a common reception apparatus disposed inside the moving object, the common reception apparatus has a received signal detecting section that detects a signal for each user terminal, based on signals transmitted from the plurality of user terminals, and a transmission section that transmits the detected signal to each user terminal, and the user terminal receives the signal for the user terminal detected in the common reception apparatus in the reception section to demodulate. By this means, for group mobility, it is possible to cancel interference among user terminals to improve the multiplexing effect, while suppressing communication overhead.
摘要翻译： 为了抑制存在于同一运动物体内的多个终端中的移动通信（组移动性）的系统性能的降低，无线电通信系统用于存在于移动物体和无线电基站内的多个用户终端，用户终端 具有接收从无线基站发送的信号的接收部，以及将从无线基站发送的信号发送到设置在移动对象内的公共接收装置的发送部，公共接收装置具有接收信号检测部 根据从多个用户终端发送的信号，检测每个用户终端的信号;以及发送部，将检测到的信号发送到各个用户终端，用户终端接收在公共接收中检测到的用户终端的信号 设备在接收部分进行解调。 通过这种方式，对于组移动性，可以消除用户终端之间的干扰，以提高复用效果，同时抑制通信开销。
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