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公开(公告)号：US20200259576A1
公开(公告)日：2020-08-13
申请号：US16647417
申请日：2017-09-14
申请人： NTT DOCOMO, INC.
IPC分类号： H04J1/02
摘要： A terminal is disclosed including a receiver that receives a demodulation reference signal; and a processor that controls reception of the demodulation reference signal based on a parameter related to mapping of the demodulation reference signal, wherein when the parameter is configured to a specific value, a specific multiplexing method for the demodulation reference signal is supported. In other aspects, another terminal is also disclosed.
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公开(公告)号：US10651915B2
公开(公告)日：2020-05-12
申请号：US16482866
申请日：2018-02-02
申请人： NTT DOCOMO, INC.
发明人： Kazuaki Takeda , Satoshi Nagata , Chongning Na , Huiling Li , Huiling Jiang , Yuichi Kakishima
摘要： The present invention is designed to suitably mitigate the decrease in communication throughput even when type-II feedback is used. According to one aspect of the present invention, a user terminal has a control section that determines a beam pattern that shows a fixed set of beams, and determines at least one beam that is not included in the beam pattern; and a transmission section that transmits feedback information related to the beam pattern and the at least one beam that is determined.
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23.发明申请公开(公告)号：US20200067631A1
公开(公告)日：2020-02-27
申请号：US16610818
申请日：2018-05-03
申请人： NTT DOCOMO, INC.
发明人： Yuichi Kakishima , Chongning Na , Satoshi Nagata
摘要： A method of acquiring Channel State Information (CSI) includes transmitting, from a Transmission and Reception Point (TRP) to a User Equipment (UE), information indicating that both of a Resource setting and a CSI reporting setting are commonly set to activation or deactivation. The Resource setting being set to the activation causes the UE to assume that CSI-Reference Signals (RSs) are to be transmitted from the TRP. The CSI reporting setting being set to the activation triggers the UE to perform CSI reporting. The method further includes receiving, with the UE, the CSI-RSs transmitted in accordance with a predetermined type of time domain behavior when the Resource setting is set to the activation. The method further includes performing, with the UE, the CSI reporting in accordance with the predetermined type of time domain behavior when the CSI reporting setting is set to activation.
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公开(公告)号：US20200059898A1
公开(公告)日：2020-02-20
申请号：US16609426
申请日：2017-05-01
申请人： NTT DOCOMO, INC.
发明人： Ryosuke Osawa , Hiroki Harada , Yuichi Kakishima
摘要： A terminal is disclosed including a processor and a transmitter. The processor determines, based on a threshold of a criterion, a beam having the criterion that is equal to or greater than the threshold. Further, the transmitter transmits a random access preamble based on the determined beam. In other aspects, a radio communication method for a terminal is also disclosed.
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公开(公告)号：US20190356379A1
公开(公告)日：2019-11-21
申请号：US16482779
申请日：2018-02-02
申请人： NTT DOCOMO, INC.
发明人： Kazuaki Takeda , Satoshi Nagata , Chongning Na , Yuichi Kakishima
IPC分类号： H04B7/08 , H04B7/0413 , H04B7/0408
摘要： The present invention is designed so as to enable proper beam management (including, for example, reporting and/or indication of beams). According to the present invention, a user terminal has a receiving section that receives a downlink (DL) control channel for a first search space, and a control section that specifies a beam that is used to transmit and/or receive a DL control channel for the first search space based on associations between antenna ports of demodulation reference signals and mobility measurement signals.
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公开(公告)号：US20190335429A1
公开(公告)日：2019-10-31
申请号：US16473802
申请日：2017-12-26
申请人： NTT DOCOMO, INC.
发明人： Kazuaki Takeda , Kazuki Takeda , Hideyuki Moroga , Satoshi Nagata , Yuichi Kakishima , Chongning Na
摘要： The present invention is designed to ensure the robustness of beams addressed to user terminals and/or to properly recover beams addressed to user terminals when beam forming is adopted. A user terminal according to the present invention has a receiving section that receives downlink control (DL) information via a downlink control channel (DCI), and a control section that monitors a plurality of DL control channel candidates in a search space and detects the DCI. The control section determines the resource units that constitute each of the plurality of DL control channel candidates based on at least one of information related to beams in which the plurality of DL control channel candidates are provided, the number of DL control channel candidates provided in the beams and the number of these beams.
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公开(公告)号：US20190182007A1
公开(公告)日：2019-06-13
申请号：US16324868
申请日：2017-08-11
发明人： Le Liu , Yuichi Kakishima , Haralabos Papadopoulos
IPC分类号： H04L5/00
摘要： A method for wireless communication includes transmitting, from a base station (BS) to a user equipment (UE), a Channel State Information Reference Signal (CSI-RS). The CSI RS is quasi-orthogonally or non-orthogonally multiplexed on multiple resource elements (REs). The BS transmits multiple CSI-RSs to the UE and the multiple CSI-RSs are multiplexed on a same RE. The method further includes applying, with the BS, different transmission power to the multiple REs, and notifying, with the BS, the UE of transmission power information that indicates values of the applied different transmission power. The method further includes scrambling, with the BS, the multiple REs with a predetermined scrambling sequence and notifying, with the BS, the UE of scrambling sequence information that indicates predetermined scrambling sequence.
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公开(公告)号：US10256886B2
公开(公告)日：2019-04-09
申请号：US15564873
申请日：2015-06-11
申请人： NTT DOCOMO, INC.
发明人： Yuichi Kakishima , Satoshi Nagata , Chongning Na , Xiaolin Hou , Huiling Jiang
IPC分类号： H04B7/06 , H04B7/0413 , H04B7/0456 , H04L25/03
摘要： A base station that communicates with a user equipment using multiple antenna ports includes an uplink channel estimation unit that estimates uplink channel states, a downlink channel estimation unit that estimates downlink channel states based on the estimated uplink channel states and channel reciprocity of uplink and downlink, a receiver unit that receives from the user equipment CSI feedback information, and a precoder generating unit that determines a precoding matrix of downlink based on Channel State Information (CSI) indicating the estimated downlink channel states and on the CSI feedback information.
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公开(公告)号：US20180332618A1
公开(公告)日：2018-11-15
申请号：US15773434
申请日：2016-11-02
CPC分类号： H04W74/0816 , H04B7/0626 , H04L5/005 , H04L5/0055 , H04W16/14 , H04W72/1215 , H04W74/0808
摘要： A method of wireless communication using an unlicensed band includes performing, with a first transceiver, Listen-Before-Talk (LBT) in the unlicensed band, after the first transceiver has performed the LBT, transmitting a first signal from the first transceiver to a second transceiver in the unlicensed band, and after the first transceiver has transmitted the first signal, transmitting a second signal from the second transceiver to the first transceiver in the unlicensed band without the second transceiver performing the LBT.
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公开(公告)号：US20180146389A1
公开(公告)日：2018-05-24
申请号：US15572833
申请日：2016-05-13
申请人： NTT DOCOMO, INC.
发明人： Satoshi Nagata , Yuichi Kakishima , Chongning Na , Xiaolin Hou , Huiling Jiang
CPC分类号： H04W24/10 , H04L5/0048 , H04W16/28 , H04W24/08 , H04W72/04
摘要： The present invention provides a mobile station, a base station and a radio communication method. A mobile station pertaining to the present invention is provided, including a receiving section configured to receive information that indicates at least one reference signal resource and measurement window information that indicates an allocation of a measurement window; a measuring section configured to measure a reference signal, to which precoding has been applied, based on the information that indicates the at least one reference signal resource and the measurement window information, and to generate a measurement result; and a transmitting section configured to transmit the measurement result.
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