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公开(公告)号：US20200100220A1
公开(公告)日：2020-03-26
申请号：US16495512
申请日：2018-03-20
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Qin Mu , Liu Liu , Huiling Jiang
Abstract: A base station is disclosed including a processor that maps one or more control channel elements (CCEs) in a downlink control channel to one or more resource units that are obtained by an interleaver for interleaving indexes of a plurality of resource units in a control resource set, and a transmitter transmits the downlink control channel. Each of the one or more resource units are being defined as a plurality of resource element groups (REGs). A transmitter transmits the downlink control channel. In other aspects, a terminal and a radio communication method are disclosed.
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公开(公告)号：US20200092910A1
公开(公告)日：2020-03-19
申请号：US16620164
申请日：2017-06-08
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Xiaolin Hou
Abstract: The present invention is designed to perform repetition transmissions of UL grant-free transmission properly. According to one aspect of the present invention, a user terminal includes a transmission section that performs UL grant-free transmission, in which UL data is transmitted without a UL transmission command from a radio base station, and a control section that controls repetition transmissions of the UL grant-free transmission, and the control section controls selection of time resources for performing the UL grant-free transmission based on the number configured for the repetition transmissions and whether the UL grant-free transmission is possible or not.
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公开(公告)号：US20200067651A1
公开(公告)日：2020-02-27
申请号：US16609418
申请日：2017-05-02
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Xiaolin Hou
Abstract: The present invention is designed to control the transport block (TB)-based and/or code block group (CBG)-based transmission (including retransmission) and/or receipt properly. According to one aspect of the present invention, a user terminal has a receiving section that, when a code block group (CBG) comprised of one or more code blocks (CBs) is retransmitted, receives downlink control information (DCI) that is used to schedule the CBG, and a control section that controls receipt of the CBG based on the DCI, and the control section controls the decoding of the CBG based on the cause of the retransmission of the CBG.
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公开(公告)号：US10568040B2
公开(公告)日：2020-02-18
申请号：US15999242
申请日：2017-02-16
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata
Abstract: In order that a user terminal properly performs communication even when a plurality of TTIs with different time lengths is present, a user terminal of the present invention transmits an uplink shared channel in a normal TTI and/or a shortened TTI including the smaller number of symbols than the normal TTI. The user terminal controls transmission power of the uplink shared channel based on an individual parameter individually set according to a TTI length for transmitting the uplink shared channel.
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公开(公告)号：US20200052846A1
公开(公告)日：2020-02-13
申请号：US16606178
申请日：2017-04-20
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Qin Mu , Liu Liu , Xu Zhang
IPC: H04L5/00
Abstract: For the purpose of reducing the deterioration of the quality of communication and/or the drop in the efficiency of the use of resources even when communication is carried out based on different configurations from those of existing LTE systems, according to one aspect of the present invention, a user terminal has a receiving section that receives a downlink control channel, which is transmitted by using a downlink control channel element comprised of a plurality of resource element groups (REGs) and/or one or more REG groups, and a reference signal, which is used to demodulate the downlink control channel, and a control section that controls receipt of the downlink control channel in a certain field, and an allocation pattern of the reference signal is configured in association with at least one of the REG group, the downlink control channel element and the certain field.
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Patent Agency Ranking
公开(公告)号：US20200052841A1
公开(公告)日：2020-02-13
申请号：US16492474
申请日：2017-03-10
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Shaozhen Guo , Lihui Wang , Xiaolin Hou , Huiling Jiang
Abstract: The present invention is designed to properly control enabling or disabling hopping of DMRS sequence in sTTIs shorter than 1-ms TTIs. According to one aspect of the present invention, a user terminal has a transmission section that transmits a demodulation reference signal for an uplink (UL) channel in a second transmission time interval (TTI) that is shorter than a first TTI, and a control section that controls enabling or disabling hopping of a base sequence for the demodulation reference signal based on whether or not an orthogonal cover code (OCC) is applied to the demodulation reference signal.
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公开(公告)号：US20200045771A1
公开(公告)日：2020-02-06
申请号：US16482456
申请日：2018-02-01
Applicant: NTT DOCOMO, INC.
Inventor： Yousuke Sano , Kazuki Takeda , Satoshi Nagata
Abstract: A base station configured to perform communication with a user apparatus in a radio communication system, including: a storage unit configured to store configuration information on an aggregated downlink control channel in which a plurality of downlink control channels in a plurality of slots are aggregated; and a transmission unit configured to transmit downlink control information, to the user apparatus, using the aggregated downlink control channel based on the configuration information.
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公开(公告)号：US20200029307A1
公开(公告)日：2020-01-23
申请号：US16334867
申请日：2017-09-21
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Kazuaki Takeda , Satoshi Nagata , Qin Mu , Liu Liu , Lihui Wang , Huiling Jiang
Abstract: The present invention is designed to allow communication based on appropriate numerologies even when multiple numerologies are used. According to one aspect of the present invention, a user terminal has a receiving section that monitors downlink control information by assuming a plurality of communication parameters that relate to a frequency domain and/or a time domain, and a control section that judges that at least part of parameters that relate to a search space for monitoring the downlink control information is different, for each of the communication parameters.
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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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公开(公告)号：US20200022112A1
公开(公告)日：2020-01-16
申请号：US16335440
申请日：2017-09-28
Applicant: NTT DOCOMO, INC.
Inventor： Shinpei Yasukawa , Kazuki Takeda , Satoshi Nagata
Abstract: There is provided user equipment of a radio communication system that supports TTIs having a plurality of lengths and that includes a base station and the user equipment, the user equipment including an acquisition unit configured to acquire, from the base station, information indicating a plurality of UL resources which are allocated to a plurality of symbols included in a TTI having a predetermined length and with which a scheduling request can be transmitted; and a transmission unit configured to select a UL resource from the plurality of UL resources and transmit the scheduling request to the base station with the selected UL resource.
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