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公开(公告)号：US11357009B2
公开(公告)日：2022-06-07
申请号：US16637783
申请日：2018-08-09
Applicant: NTT DOCOMO, INC.
Inventor： Min Liu , Chongning Na , Xin Wang , Yuichi Kakishima
Abstract: A beam selection method, a base station, and a user equipment are presented. The beam selection method performed by the base station includes: receiving transmission beam group information on the base station and information on receiving capability of a receiving set of a user equipment corresponding to each transmission beam group fed back by the user equipment, where the information on receiving capability of the receiving set is the number of reception beams that the user equipment can simultaneously form in the receiving set; and selecting transmission beams corresponding to the receiving set and used for transmitting information to the user equipment based at least in part on the transmission beam group information and the information on receiving capability of each receiving set.
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公开(公告)号：US20210219366A1
公开(公告)日：2021-07-15
申请号：US17056227
申请日：2018-05-18
Applicant: NTT DOCOMO, INC.
Inventor： Yuki Matsumura , Tooru Uchino , Satoshi Nagata , Min Liu , Jing Wang
Abstract: According to one aspect of the present disclosure, there is provided a user terminal including: a control section that determines the number of at least one of first reference signals for beam failure detection and second. reference signals for new candidate beam identification that can be simultaneously monitored cross a plurality of cells based on a specific capability of the user terminal; and a receiving section that simultaneously monitors at least one of the first reference signals and the second reference signals in one or more cells based on the number of at least one of the first reference signals and the second reference signals that can be simultaneously monitored cross the plurality of cells. According to one aspect of the present disclosure, a beam recovery procedure can be appropriately performed even when BFRs in a plurality of cells are supported.
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公开(公告)号：US20210076442A1
公开(公告)日：2021-03-11
申请号：US17048241
申请日：2019-04-15
Applicant: NTT DOCOMO, INC.
Inventor： Yuki Matsumura , Kazuki Takeda , Satoshi Nagata , Min Liu , Jing Wang , Xiaolin Hou
Abstract: A terminal is disclosed including a processor that starts a timer based on a beam failure instance counter; a receiver that receives a reference signal for identifying a candidate beam; and a transmitter that, if the reference signal has layer 1 reference signal received power (L1-RSRP) exceeding a threshold value before the timer expires, and if there is at least one of contention-free random access (CFRA) resources corresponding to the reference signal, transmits a random access preamble using the at least one of CFRA resources. In other aspects, a radio communication method and a base station are also disclosed.
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公开(公告)号：US20210037589A1
公开(公告)日：2021-02-04
申请号：US16964361
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; and a transmitter that, when the beam failure instance counter is greater than or equal to a given threshold, transmits a random access preamble based on a transmission instruction from the higher layer. In another aspect, a radio communication method for a terminal is also disclosed.
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公开(公告)号：US20200288334A1
公开(公告)日：2020-09-10
申请号：US16646066
申请日：2017-09-11
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Chongning Na , Min Liu
Abstract: The present disclosure is designed to properly control RLM when beam recovery procedures are expected to be executed. In accordance with one aspect of the present invention, a user terminal has a receiving section that receives information about a hypothetical downlink control channel, and a control section that controls, based on the information, monitoring of radio link quality of a downlink signal in a first set, which is assumed to be quasi-co-located (in QCL) with a demodulation reference signal for a downlink control channel, and/or radio link quality of a downlink signal in a second set, which is configured by a radio base station.
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Patent Agency Ranking
公开(公告)号：US12289270B2
公开(公告)日：2025-04-29
申请号：US16960678
申请日：2018-01-12
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Min Liu , Xiaolin Hou , Chongning Na
Abstract: The present disclosure is designed to determine appropriate spatial resources for uplink control channels. A user terminal has a receiving section that receives, through higher layer signaling, a plurality of entries of information related to a spatial resource for an uplink control channel, and receives specifying information that specifies, amongst the plurality of entries, entries that correspond respectively to the plurality of uplink control channel resources, by means of a control element of media access control, and a control section that controls determination of one of the plurality of uplink control channel resources, and controls transmission of the uplink control channel, by using an entry that corresponds to the determined uplink control channel resource, amongst the specified entries.
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公开(公告)号：US11432365B2
公开(公告)日：2022-08-30
申请号：US16961435
申请日：2018-01-12
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Min Liu , Xiaolin Hou , Chongning Na
Abstract: According to the present disclosure, a user terminal has a receiving section that receives a MAC (Medium Access Control) control element, which includes one or more fields that respectively correspond to one or more control resource sets, and a control section that controls receipt of a downlink control channel, which is mapped to a given resource unit in the control resource sets, based on transmission configuration indicator (TCI) states of the control resource sets, shown in the fields.
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公开(公告)号：US11129038B2
公开(公告)日：2021-09-21
申请号：US16607116
申请日：2018-05-03
Applicant: NTT DOCOMO, INC.
Inventor： Min Liu , Xin Wang , Chongning Na , Yuichi Kakishima , Satoshi Nagata
Abstract: A hybrid channel quality measurement method is presented. The method includes: performing a first channel measurement according to Channel State Information Reference Signals (CSI-RSs), and transmitting a first channel measurement feedback to a base station according to a first channel measurement result; determining whether to perform a second channel measurement feedback based on Demodulation Reference Signals (DMRSs) after the first channel measurement feedback is performed; and performing a second channel measurement according to the DMRSs when determining to perform the second channel measurement feedback, and transmitting the second channel measurement feedback to the base station according to a second channel measurement result.
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公开(公告)号：US20210120574A1
公开(公告)日：2021-04-22
申请号：US16494426
申请日：2017-03-17
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Qin Mu , Liu Liu , Chongning Na , Xin Wang , Jing Wang , Lihui Wang , Min Liu , Huiling Jiang
Abstract: A terminal is disclosed including a receiver that receives a downlink control information and a downlink shared channel that is scheduled by the downlink control information. The terminal also includes a processor that determines an allocation of the downlink shared channel in a time domain based on a first timing indicated by a first time unit and a second timing indicated by a second time unit that are obtained from information notified by the downlink control information. In other aspects, a radio communication method is also disclosed.
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公开(公告)号：US20210120557A1
公开(公告)日：2021-04-22
申请号：US16494440
申请日：2017-03-17
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Qin Mu , Liu Liu , Chongning Na , Xin Wang , Jing Wang , Lihui Wang , Min Liu , Huiling Jiang
Abstract: The present invention is designed to appropriately select PUCCH resources used to transmit HARQ-ACK. According to one aspect of the present invention, a user terminal has a control section that monitors candidate resources of one or more downlink (DL) control channels (DL) transmitted in multiple different time and/or frequency resources, and detects one or more downlink control information (DCI), and a transmission section that transmits delivery acknowledgment information in response to a downlink (DL) data channel by using an uplink (UL) control channel, and the control section selects resources for the UL control channel based on the DCI.
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