公开(公告)号：US20200322991A1

公开(公告)日：2020-10-08

申请号：US16088364

申请日：2017-03-16

申请人： NTT DOCOMO, INC.

发明人： Yousuke Sano ,  Kazuaki Takeda ,  Satoshi Nagata

IPC分类号： H04W74/08 ,  H04W76/11 ,  H04W76/27

摘要： There is provided user equipment of a radio communication system including a base station and the user equipment, the user equipment includes a receiver that receives a plurality of user equipment identifier candidates from the base station; a selector that selects one user equipment identifier from the plurality of user equipment identifier candidates; and a transmitter that transmits a signal of an uplink shared channel using the one user equipment identifier that is selected, without performing contention resolution of the user equipment identifier used by the user equipment with the base station.

公开(公告)号：US20200322977A1

公开(公告)日：2020-10-08

申请号：US16303470

申请日：2017-03-31

申请人： NTT DOCOMO, INC.

发明人： Shimpei Yasukawa ,  Satoshi Nagata ,  Riichi Kudou

IPC分类号： H04W72/12 ,  H04W52/38

摘要： User equipment of a radio communication system that supports a plurality of types of subframes that can be configured to be any of an uplink, a downlink, or a sidelink, the user equipment including an acquisition unit that acquires type information for notifying a type of a subframe; a transmitter that transmits a sidelink signal according to a transmission and reception operation corresponding to the subframe type notified via the type information when transmitting the sidelink signal; and a receiver that receives the sidelink signal according to a transmission and reception operation corresponding to the subframe type notified via the type information when receiving the sidelink signal.

公开(公告)号：US20180332612A1

公开(公告)日：2018-11-15

申请号：US15755908

申请日：2016-08-22

申请人： NTT DOCOMO, INC.

发明人： Kazuki Takeda ,  Hiroki Harada ,  Satoshi Nagata

IPC分类号： H04W72/14 ,  H04L5/00

CPC分类号： H04W72/14 ,  H04J1/00 ,  H04J11/00 ,  H04L5/0044 ,  H04L5/0055 ,  H04W28/04 ,  H04W72/04 ,  H04W72/12

摘要： 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.

公开(公告)号：US20170303212A1

公开(公告)日：2017-10-19

申请号：US15513805

申请日：2015-09-25

申请人： NTT DOCOMO, INC.

发明人： Kazuki Takeda ,  Hideaki Takahashi ,  Satoshi Nagata

IPC分类号： H04W52/32 ,  H04W52/48 ,  H04W52/36

CPC分类号： H04W52/325 ,  H04W16/32 ,  H04W52/146 ,  H04W52/346 ,  H04W52/36 ,  H04W52/362 ,  H04W52/367 ,  H04W52/38 ,  H04W52/48 ,  H04W52/50 ,  H04W72/04 ,  H04W74/08

摘要： A user terminal that communicates using a plurality of CGs (Cell Groups) including a first CG and a second CG, includes a PHY layer processing section that controls transmission power of a PRACH (Physical Random Access Channel) in each CG; and a MAC layer processing section that controls retransmission of the PRACH. When total transmission power of PRACHs of the plurality of CGs that are transmitted in an overlapping manner exceeds allowable maximum transmission power, the PHY layer processing section controls so as to preferentially allocate transmission power to the PRACH of the first CG, and based on notification which is reported from the PHY layer processing section when total transmission power of PRACHs of the plurality of CGs that are transmitted in an overlapping manner exceeds allowable maximum transmission power, the MAC layer processing section controls power-ramping in retransmission of the PRACH of the second CG.

公开(公告)号：US20240172230A1

公开(公告)日：2024-05-23

申请号：US18283415

申请日：2021-03-24

申请人： NTT DOCOMO, INC.

发明人： Yuki Matsumura ,  Satoshi Nagata ,  Jing Wang ,  Lan Chen

IPC分类号： H04W72/1273 ,  H04L5/00 ,  H04L27/26 ,  H04W56/00

CPC分类号： H04W72/1273 ,  H04L5/0051 ,  H04L27/26025 ,  H04W56/0015

摘要： A terminal according to one aspect of the present disclosure includes: a control section that judges allocation of a downlink shared channel or a reference signal for the downlink shared channel, based on at least one of a cell index, a control resource set pool index, and a group index configured for a control resource set to which each of the synchronization signal block and the downlink shared channel corresponds; and a reception section that receives at least one of the synchronization signal block and the downlink shared channel.

公开(公告)号：US20190254082A1

公开(公告)日：2019-08-15

申请号：US16346803

申请日：2017-11-01

申请人： NTT DOCOMO, INC.

发明人： Kazuaki Takeda ,  Naoto Ookubo ,  Satoshi Nagata

IPC分类号： H04W74/08 ,  H04L1/18 ,  H04W52/36 ,  H04W28/04 ,  H04W16/28

CPC分类号： H04W74/0841 ,  H04L1/1819 ,  H04W16/28 ,  H04W28/04 ,  H04W52/06 ,  H04W52/367 ,  H04W74/08

摘要： To properly perform a random access procedure in communication using beam forming, a user terminal of the present invention is characterized by having a receiving section that receives a DL signal transmitted from a radio base station, a transmitting section that transmits a PRACH using a predetermined random access preamble (PRACH) resource selected based on the DL signal, and a control section that controls retransmission of the PRACH using a different PRACH resource from the predetermined PRACH resource, when reception of a response signal to the PRACH transmission does not succeed.

公开(公告)号：US20180098369A1

公开(公告)日：2018-04-05

申请号：US15564075

申请日：2016-03-25

申请人： NTT DOCOMO, INC.

发明人： Shimpei Yasukawa ,  Satoshi Nagata ,  Yongbo Zeng ,  Qun Zhao ,  Yongsheng Zhang

IPC分类号： H04W76/02 ,  H04W92/18 ,  H04W48/10 ,  H04W52/28 ,  H04W72/10

摘要： A user apparatus is provided. The user apparatus is used in a mobile communication system in which D2D communications are supported. The user apparatus includes an obtaining unit configured to obtain from a base station control rules including predetermined communication methods applied to corresponding user apparatus types; a determination unit configured to determine which of the predetermined communication methods is to be applied to the user apparatus by comparing a type of the user apparatus and the control rules; and a transmission unit configured to transmit a D2D signal based on the determined predetermined communication method.

公开(公告)号：US20170041865A1

公开(公告)日：2017-02-09

申请号：US15107142

申请日：2014-12-15

申请人： NTT DOCOMO, INC.

发明人： Kazuki Takeda ,  Kazuaki Takeda ,  Tooru Uchino ,  Satoshi Nagata

IPC分类号： H04W48/18 ,  H04W72/12

摘要： A user terminal that communicates with a plurality of cell groups (CG), each group being formed with one or more cells to use different frequency bands, and a control section that selects at least one cell, from the cells where uplink control signals can be allocated, which are configured in each CG, and controls the cell to transmit the uplink control signals. When information to indicate cross-carrier scheduling (CCS) is included in a downlink control signal, the control section decides whether or not the cell having received the downlink control signal and the cell that is designated by the information to indicate CCS belong to the same CG, and selects the cell based on this decision. Thus, the decrease of overall system performance can be reduced even when CCS and uplink control signal transmission in secondary cells are employed at the same time.

摘要翻译： 与多个小区组（CG）进行通信的用户终端，每组由一个以上的小区构成，以使用不同的频带，以及控制部，从上行控制信号的小区中选择至少一个小区 分配，其被配置在每个CG中，并且控制小区来发送上行链路控制信号。 当在下行链路控制信号中包含用于指示跨载波调度（CCS）的信息时，控制部判定接收到下行链路控制信号的小区和由表示CCS的信息指定的小区是否属于同一 CG，并根据此决定选择单元格。 因此，即使同时使用二次电池中的CCS和上行链路控制信号传输，也可以降低总体系统性能。

公开(公告)号：US20200322923A1

公开(公告)日：2020-10-08

申请号：US16088360

申请日：2017-03-16

申请人： NTT DOCOMO, INC.

发明人： Shimpei Yasukawa ,  Satoshi Nagata ,  Qun Zhao ,  Liu Liu ,  Anxin Li ,  Huiling Jiang

IPC分类号： H04W72/02 ,  H04W72/04

摘要： Provided is user equipment of a radio communication system that supports D2D communication, the user equipment including a selector that selects a plurality of control information resources for repeatedly transmitting control information from a control information resource pool and that selects a plurality of data resources for repeatedly transmitting data from a data transmission resource pool; and a transmitter that repeatedly transmits the control information including information that specifies the data resources using the control information resources and repeatedly transmits the data using the data resources, wherein the selector selects the control information resources and the data resources so that a control information resource for transmitting the control information for a first time among the control information resources and a data resource for transmitting the data for a first time among the data resources are in a same subframe.

公开(公告)号：US20200322119A1

公开(公告)日：2020-10-08

申请号：US16303834

申请日：2017-05-25

申请人： NTT DOCOMO, INC.

发明人： Yuki Matsumura ,  Kazuki Takeda ,  Satoshi Nagata

IPC分类号： H04L5/02 ,  H04L5/00

摘要： The present invention is designed so that, in a future radio communication system that accommodates multiple user terminals having different numerologies, these multiple user terminals can transmit UL reference signals properly. According to the present invention, a user terminal receives information related to an uplink (UL) reference signal, and controls transmission of the UL reference signal in a specific period based on the information related to the UL reference signal. In this specific period, UL reference signals of a plurality of user terminals where different numerologies are configured are multiplexed.