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公开(公告)号：US20210058797A1
公开(公告)日：2021-02-25
申请号：US16964786
申请日：2019-01-17
Applicant: NTT DOCOMO, INC.
Inventor： Shohei Yoshioka , Satoshi Nagata , Min Liu , Jing Wang , Chongning Na , Yuichi Kakishima
Abstract: A terminal is disclosed including a processor that increments a beam failure instance counter in a higher layer, based on a beam failure instance indication received from a physical layer; a transmitter that, when the beam failure instance counter is greater than or equal to a predetermined threshold, transmits a random access preamble based on a transmission instruction from the higher layer; and a receiver that monitors, within a predetermined response window period, a physical downlink control channel (PDCCH) for a response to the random access preamble based on a predetermined search space setting. In another aspect, a radio communication method for a terminal is also disclosed.
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22.发明申请公开(公告)号：US20200304190A1
公开(公告)日：2020-09-24
申请号：US16089098
申请日：2017-03-30
Applicant: NTT DOCOMO, INC.
Inventor： Chongning Na , Huiling Jiang , Yuichi Kakishima , Satoshi Nagata
IPC: H04B7/06 , H04B7/0417
Abstract: An embodiment of the present invention provides a CSI-RS transmission method, a CSI feedback method, a base station and a mobile station. The transmission method for a base station transmitting a channel state information reference signal (CSI-RS), includes transmitting a first CSI-RS relating to a first antenna port of the base station to a mobile station, forming a second antenna port that is beamformed based on a first CSI feedback received from the mobile station, transmitting a second CSI-RS relating to the second antenna port to the mobile station, and selecting a beam for data transmission to the mobile station, based on a second CSI feedback received from the mobile station.
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公开(公告)号：US20200295905A1
公开(公告)日：2020-09-17
申请号：US16650929
申请日：2017-09-29
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Yuichi Kakishima , Huiling Li , Chongning Na , Lihui Wang , Xin Wang
IPC: H04L5/00
Abstract: To appropriately control UL transmission such as a CSI reporting when communication is performed by applying a different configuration from those of legacy LTE systems, one aspect of a user terminal according to the present invention includes: a transmitting section that transmits first Channel State Information (CSI) and second CSI of different information types to be reported, by using an uplink control channel and/or an uplink shared channel based on timings respectively configured by a base station; and a control section that, when transmission timings of the first CSI and the second CSI overlap, performs control to transmit both or one of the first CSI and the second CSI.
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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
Applicant: NTT DOCOMO, INC.
Inventor： Keisuke Saito , Kazuaki Takeda , Satoshi Nagata , Yuichi Kakishima
IPC: H04J1/02
Abstract: 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
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Satoshi Nagata , Chongning Na , Huiling Li , Huiling Jiang , Yuichi Kakishima
Abstract: 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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Patent Agency Ranking
26.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
Applicant: NTT DOCOMO, INC.
Inventor： Yuichi Kakishima , Chongning Na , Satoshi Nagata
Abstract: 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
Applicant: NTT DOCOMO, INC.
Inventor： Ryosuke Osawa , Hiroki Harada , Yuichi Kakishima
Abstract: 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
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Satoshi Nagata , Chongning Na , Yuichi Kakishima
IPC: H04B7/08 , H04B7/0413 , H04B7/0408
Abstract: 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
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Kazuki Takeda , Hideyuki Moroga , Satoshi Nagata , Yuichi Kakishima , Chongning Na
Abstract: 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
Applicant: DOCOMO INNOVATION, INC. , NTT DOCOMO, INC.
Inventor： Le Liu , Yuichi Kakishima , Haralabos Papadopoulos
IPC: H04L5/00
Abstract: 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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