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公开(公告)号：US20190132823A1
公开(公告)日：2019-05-02
申请号：US16099596
申请日：2017-05-09
Applicant: NTT DOCOMO, INC.
Inventor： Yousuke Sano , Kazuaki Takeda , Kazuki Takeda , Satoshi Nagata
Abstract: Provided is a technique that transmits data, which is transmitted without obtaining transmission permission, with low delay and high reliability.An aspect of the invention relates to a transmitter including a resource determination unit that determines whether a first type of resource has been allocated in response to the generation of a transmission event for a predetermined type of information and a transmitting unit that transmits the predetermined type of information to a receiver, using the first type of resource, without obtaining transmission permission, when the first type of resource has been allocated.
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公开(公告)号：US20190124682A1
公开(公告)日：2019-04-25
申请号：US16098951
申请日：2017-05-02
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Kazuaki Takeda , Hiroki Harada , Satoshi Nagata
Abstract: The present invention is designed to provide a user terminal and a radio communication method, whereby the period to apply contention-based UL data transmission can be configured adequately. A user terminal according to the present invention has a transmission section that transmits UL data to a radio base station, and a control section that controls application of contention-based UL data transmission in which UL data is transmitted without a UL grant from the radio base station, and the control section controls whether or not to apply the contention-based UL data transmission based on a running state of a timing advance (TA) timer.
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公开(公告)号：US20190124536A1
公开(公告)日：2019-04-25
申请号：US16098370
申请日：2017-03-29
Applicant: NTT DOCOMO, INC.
Inventor： Keisuke Saito , Kazuki Takeda , Hiroki Harada , Satoshi Nagata
Abstract: Provided is a user equipment in a radio communication system including a base station and the user equipment, including a first measuring unit that measures a reception quality or channel information using a first reference signal transmitted in a first flexibly-selected time interval other than a time interval which is set periodically in a radio frame divided into predetermined time intervals, a second measuring unit that measures a reception quality or channel information using a second reference signal transmitted in a second flexibly-selected time interval other than the time interval which is set periodically in the radio frame divided into the predetermined time intervals, and a reporting unit that reports the reception quality or the channel information measured using the first reference signal, and the reception quality or the channel information measured using the second reference signal to the base station.
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公开(公告)号：US20190110316A1
公开(公告)日：2019-04-11
申请号：US16300386
申请日：2017-05-11
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Kazuki Takeda , Yousuke Sano , Satoshi Nagata
Abstract: The present invention is designed to reduce the latency due to collisions in UL transmission when contention-based UL data transmission is employed. A user terminal communicates using a second transmission time interval (TTI), having a shorter TTI duration than a first TTI, and this user terminal has a transmission section that transmits multiple UL data without a UL grant from a radio base station, and a control section that controls allocation of the multiple UL data individually, and the control section applies frequency hopping to allocate the multiple UL data to resources of different second TTIs.
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公开(公告)号：US20190037606A1
公开(公告)日：2019-01-31
申请号：US16070013
申请日：2017-01-12
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Kazuki Takeda , Satoshi Nagata
Abstract: In order to realize appropriate communications in a next generation communication system, the present invention provides a user terminal including: a reception section that receives broadcast information transmitted from a radio base station; and a control section that controls reception in a random access procedure. The reception section receives given broadcast information in the random access procedure. The given broadcast information may be broadcast information for a specific user terminal group.
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Patent Agency Ranking
公开(公告)号：US20190021060A1
公开(公告)日：2019-01-17
申请号：US16070737
申请日：2017-01-18
Applicant: NTT DOCOMO, INC.
Inventor： Takayuki Isogawa , Naoto Ookubo , Takahiro Takiguchi , Anil Umesh , Tooru Uchino , Kazuki Takeda
Abstract: The communication control method according to the present invention is performed in a radio base station (200) that includes a remote device (260) and a central aggregation device (210), and that performs radio communication with a user device (300). The communication control method includes acquiring including the remote device (260) acquiring predetermined information necessary to perform a transmission power control of an uplink signal transmitted from the user device (300); transmitting including the remote device (260) transmitting to the central aggregation device (210) the acquired predetermined information; receiving including the central aggregation device (210) receiving the predetermined information; and processing includes the central aggregation device (210) processing, based on the received predetermined information, TPC information that causes the user device (300) to perform the transmission power control.
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公开(公告)号：US20190007931A1
公开(公告)日：2019-01-03
申请号：US15752365
申请日：2016-08-09
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Kazuki Takeda , Satoshi Nagata
Abstract: The present invention is designed to carry out communication adequately in cells (for example, unlicensed bands) where listening is executed prior to transmission. The present invention provides a transmission section that transmits a discovery measurement signal including first reference signals for channel state measurement, based on the result of listening, and a control section that controls resource allocation of the discovery measurement signal, and the control section assigns the first reference signals to be extended greater in a direction of time than existing second reference signals for channel state measurement.
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公开(公告)号：US20180332612A1
公开(公告)日：2018-11-15
申请号：US15755908
申请日：2016-08-22
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Hiroki Harada , Satoshi Nagata
CPC classification number: H04W72/14 , H04J1/00 , H04J11/00 , H04L5/0044 , H04L5/0055 , H04W28/04 , H04W72/04 , H04W72/12
Abstract: According to the present invention, low-latency communication in a next-generation mobile communication system can be achieved. A user terminal includes a receiving section configured to receive at least one piece of downlink control information out of first downlink control information that schedules reception of downlink data and second downlink control information that schedules transmission of uplink data; and a control section configured to perform a control to carry out communication using a transmission time interval (TTI) configuration, including an allocation section for receiving the downlink control information, a data section for carrying out reception of downlink data corresponding to the received downlink control information and/or transmission of uplink data, and a delivery acknowledgement section for carrying out reception and/or transmission of delivery acknowledgement information corresponding to predetermined data.
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公开(公告)号：US10103865B2
公开(公告)日：2018-10-16
申请号：US15024655
申请日：2014-09-19
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Hiroyuki Ishii
Abstract: The present invention is designed to enable appropriate transmission and reception in user terminals even when CA is executed by applying different duplex modes between multiple cells. A user terminal communicates with an FDD cell and a TDD cell by using carrier aggregation, and has a transmitting/receiving section that receives DL signals transmitted from each cell and transmits UL signals to each cell, and a report control section that controls reporting of capability information regarding simultaneous transmission and reception of the DL signals and UL signals in the transmitting/receiving section. The report control section controls reporting of the capability information regarding simultaneous transmission and reception of the transmitting/receiving section with respect to every combination of a frequency band to use in the FDD cell and a frequency band to use in the TDD cell.
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公开(公告)号：US10097983B2
公开(公告)日：2018-10-09
申请号：US15032340
申请日：2014-10-22
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Kazuki Takeda , Satoshi Nagata
Abstract: The present invention is designed to prevent producing inter-symbol interference against normal uplink communication in collision-type D2D discovery during inter-terminal direct communication. A radio base station can communicate with a user terminal that can execute inter-terminal direct communication, and has a control section that configures a D2D discovery resource area by allocating a type 2 discovery resource area immediately after a type 1 discovery resource area in a row, and a transmission section that transmits allocation information of the D2D discovery resource area.
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