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公开(公告)号：US20210037575A1
公开(公告)日：2021-02-04
申请号：US17043355
申请日：2018-04-05
Applicant: NTT DOCOMO, INC.
Inventor： Tomoya Ohara , Hiroki Harada
Abstract: A terminal is disclosed including a receiver that receives control information that is a trigger for initiating a random access procedure; a processor that selects an occasion for transmitting a random access preamble; and a transmitter that transmits the random access preamble using the occasion, wherein the receiver receives a response to the random access preamble using a resource for monitoring control information for receiving the response to the random access preamble, by assuming quasi co-location not related to quasi co-location that is associated with the resource for monitoring the control information. In other aspects, a response reception method and a base station are also disclosed.
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公开(公告)号：US20200374726A1
公开(公告)日：2020-11-26
申请号：US16637169
申请日：2017-08-10
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Satoshi Nagata , Jing Wang , Liu Liu
Abstract: To measure received quality appropriately. A user terminal according to one aspect of the present invention includes: a receiving section that receives a reference signal in one or more reference signal resources for a measurement of a channel state; and a measurement section that measures a first received power of the reference signal and a second received power in radio resources associated with the one or more reference signal resources, wherein the measurement section derives received quality of a cell, based on the first received power and the second received power.
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公开(公告)号：US20200296768A1
公开(公告)日：2020-09-17
申请号：US16890516
申请日：2020-06-02
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Hiroki Harada
Abstract: A terminal is disclosed that includes a transmitter that transmits a physical uplink shared channel (PUSCH) and a measurement reference signal (sounding reference signal (SRS)) and a processor that performs sensing and controls to contiguously transmit the PUSCH and the SRS after the sensing. In other aspects, a radio communication method and a base station are disclosed.
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公开(公告)号：US20200229236A1
公开(公告)日：2020-07-16
申请号：US16644449
申请日：2017-09-08
Applicant: NTT DOCOMO, INC.
Inventor： Tomoya Ohara , Hiroki Harada
Abstract: A base station apparatus that communicates with a user apparatus is provided. The base station apparatus includes: a setting unit configured to arrange in a radio frame one or more blocks and information, the one or more blocks including information used for initial access, the information specifying resources that are associated with the blocks and are used for transmitting preambles; a transmission unit configured to transmit the radio frame to the user apparatus; and a reception unit configured to receive the preambles from the user apparatus via the resources. The information specifying the resource is set based on locations of the blocks arranged in the radio frame.
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公开(公告)号：US20200221404A1
公开(公告)日：2020-07-09
申请号：US16649569
申请日：2018-09-18
Applicant: NTT DOCOMO, INC.
Inventor： Daiki Takeda , Satoshi Nagata , Daisuke Murayama , Hiroki Harada
Abstract: A terminal is disclosed including a receiver configured to receive a synchronization signal block (SS/PBCH block) including information that indicates a configuration of a control resource set; and a processor configured to determine a position of the control resource set relative to the SS/PBCH block based on the information. In other aspects, another terminal, a radio communication method for a terminal, and a base station are also disclosed.
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Patent Agency Ranking
106.发明授权公开(公告)号：US10708948B2
公开(公告)日：2020-07-07
申请号：US16069579
申请日：2017-02-03
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Kazuki Takeda , Satoshi Nagata
Abstract: An object is to provide proper resource assignment in communication using an unlicensed band. A user terminal includes: a transmitting section that transmits a UL signal; and a control section that controls the transmitting section to transmit a physical uplink shared channel (PUSCH) and a measurement reference signal (sounding reference signal (SRS)) in accordance with different grants included in a DL signal. The control section transmits the physical uplink shared channel following transmission of the measurement reference signal.
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公开(公告)号：US10673570B2
公开(公告)日：2020-06-02
申请号：US15750118
申请日：2016-08-04
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Satoshi Nagata
Abstract: The present invention is designed to allow co-presence with other systems, and, furthermore, achieve improved spectral efficiency in cells (for example, unlicensed bands) in which pre-transmission listening is employed. The present invention provides a transmission section that transmits a DL signal, a control section that performs listening before the DL signal is transmitted, and controls DL transmission, and a receiving section that receives a delivery acknowledgement signal (ACK/NACK) in response to the DL transmission, and the control section controls a contention window size to apply to listening based on the number of NACKs in response to a predetermined period of DL transmission.
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公开(公告)号：US20200059873A1
公开(公告)日：2020-02-20
申请号：US16346320
申请日：2017-11-01
Applicant: NTT DOCOMO, INC.
Inventor： Daiki Takeda , Hiroki Harada , Satoshi Nagata
Abstract: Even when different numerologies from those of legacy LTE systems are used, synchronization signals are appropriately transmitted and/or received. A user terminal includes: a reception section that receives a first synchronization signal and a second synchronization signal mapped on predetermined resources; and a control section that controls synchronization processing based on the first synchronization signal and the second synchronization signal, and spacings of the first synchronization signal and the second synchronization signal at which the first synchronization signal and the second synchronization signal are mapped on subcarriers are different.
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公开(公告)号：US20200053738A1
公开(公告)日：2020-02-13
申请号：US16496211
申请日：2017-03-23
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Satoshi Nagata , Jing Wang , Liu Liu
Abstract: The present invention is designed to configure RRM measurement properly. A user terminal according to one aspect of the present invention has a receiving section that receives information about a parameter that is common among a plurality of resources for a reference signal, and a control section that controls, based on information about the parameter, reporting of results of measurement using the reference signal in part of the plurality of resources, and information about measured resources.
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公开(公告)号：US20200022176A1
公开(公告)日：2020-01-16
申请号：US16471097
申请日：2017-12-21
Applicant: NTT DOCOMO, INC.
Inventor： Ryosuke Osawa , Kazuki Takeda , Hiroki Harada
Abstract: The present invention is designed to suitably reduce the degradation of spectral efficiency even when communication is performed using a waveform of a single-carrier transmission scheme. According to one aspect of the present invention, a user terminal has a receiving section that receives a downlink control signal, which schedules transmission of a data signal in accordance with a waveform that is based on a single-carrier transmission scheme, and a transmission section that transmits a sounding reference signal, which is different from an uplink sounding reference signal used in existing LTE and which has a wider transmission bandwidth than the data signal, by using the waveform based on the single-carrier transmission scheme.
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