公开(公告)号：US20180323948A1

公开(公告)日：2018-11-08

申请号：US16032339

申请日：2018-07-11

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Hiroyuki Ishii

IPC: H04L5/14 ,  H04L5/00 ,  H04W72/04 ,  H04L1/18

CPC classification number: H04L5/14 ,  H04L1/18 ,  H04L5/001 ,  H04L5/0055 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/044

Abstract: The present invention is designed so that uplink transmission is carried out adequately even when CA is executed by applying different duplex modes between multiple cells. A user terminal that receives downlink control information (DCI) including Downlink Assignment Index (DAI) in a frequency division duplex (FDD) cell and controls, based on the DAI, transmission of a transmission acknowledgement signal for a downlink shared channel that is scheduled to the FDD cell by the DCI.

公开(公告)号：US09843966B2

公开(公告)日：2017-12-12

申请号：US14400765

申请日：2013-06-13

Applicant: NTT DOCOMO, INC.

Inventor： Hiroto Yasuda ,  Yasufumi Morioka ,  Jinho Kim ,  Hideaki Takahashi ,  Junichiro Hagiwara ,  Hiroyuki Ishii

IPC: H04W36/00 ,  H04W76/02

CPC classification number: H04W36/0005 ,  H04W36/0055

Abstract: A radio communication system includes a user device, a first base station, a second base station, a switching center, and a gateway device. In a handover operation performed in a situation in which a user-plane path has been established through the first base station, the first base station transmits, to the user device, a radio connection reconfiguration message commanding that a radio bearer be established between the second base station and the user device and receives a radio connection reconfiguration complete message transmitted from the user device. The first base station transmits, to the switching center, a path switching request message requesting that the established user-plane path be changed so as to pass through the second base station.

公开(公告)号：US09674838B2

公开(公告)日：2017-06-06

申请号：US14434002

申请日：2013-09-10

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Satoshi Nagata ,  Yoshihisa Kishiyama ,  Hiroyuki Ishii

IPC: H04W72/04 ,  H04W72/12 ,  H04L5/00 ,  H04L5/14 ,  H04W76/02 ,  H04W84/04 ,  H04W16/32 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W72/0453 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/14 ,  H04L5/1469 ,  H04W16/32 ,  H04W72/0426 ,  H04W72/1268 ,  H04W76/15 ,  H04W84/045 ,  H04W88/02 ,  H04W88/08

Abstract: The present invention is designed to enable 1-CC transmission when carrier aggregation is carried out by aggregating a first component carrier, which is used in a macro cell, and a second component carrier, which is used in a small cell. A user terminal according to the present invention receives duration configuration information, which indicates a first duration to communicate with a macro base station by using the first component carrier, and a second duration to communicate with a small base station by using the second component carrier, configures the first duration and the second duration based on the duration configuration information, transmits uplink signals for the macro base station by using the first component carrier in the first duration, and transmits uplink signals for the small base station by using the second component carrier in the second duration.

公开(公告)号：US09578564B2

公开(公告)日：2017-02-21

申请号：US14872924

申请日：2015-10-01

Applicant: NTT DOCOMO, INC.

Inventor： Hiroyuki Ishii

IPC: H04B1/00 ,  H04W36/04 ,  H04W8/08 ,  H04W76/04 ,  H04W16/14 ,  H04W76/02 ,  H04W76/06 ,  H04W36/22 ,  H04W36/38 ,  H04W84/04

CPC classification number: H04W36/04 ,  H04W8/082 ,  H04W16/14 ,  H04W28/0215 ,  H04W36/22 ,  H04W36/38 ,  H04W76/10 ,  H04W76/14 ,  H04W76/18 ,  H04W76/20 ,  H04W76/30 ,  H04W84/045

Abstract: In a cellular telecommunications network, a mobile communication system to offload data traffic from base stations to small-node devices, includes a radio base station, a plurality of small-node devices, a macro-base-station-to-the-small-node-device (BS2D) communication section configured to receive a first control-plane message from the radio base station over a BS2D communication link, a small-node-device-to-user-equipment (D2UE) communication section configured to transmit user-plane data to a user equipment over a wireless D2UE communication link established responsive to the first control-plane message, and a center small-node device. The center small-node device includes a buffer section, a backhaul communication section configured to receive the user-plane traffic data from a server over a backhaul link, and is configured to manage D2UE connections between the plurality of small-node devices and the mobile station, buffer data to be transmitted in downlink and uplink for the plurality of small-node devices, and conduct a link adaptation for the D2UE connections.

Abstract translation: 在蜂窝电信网络中，将数据业务从基站卸载到小节点设备的移动通信系统包括无线基站，多个小节点设备，宏基站到小区， 节点设备（BS2D）通信部分，被配置为通过BS2D通信链路从所述无线电基站接收第一控制平面消息;小节点设备到用户设备（D2UE）通信部分， 通过响应于第一控制平面消息建立的无线D2UE通信链路向用户设备提供平面数据，以及中心小节点设备。 中心小节点设备包括缓冲区段，被配置为通过回程链路从服务器接收用户平面业务数据的回程通信部分，并且被配置为管理多个小节点设备与移动站之间的D2UE连接 在多个小节点设备的下行链路和上行链路中发送缓冲数据，并对D2UE连接进行链路自适应。

公开(公告)号：US20160286467A1

公开(公告)日：2016-09-29

申请号：US14778320

申请日：2014-02-21

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Satoshi Nagata ,  Hiroyuki Ishii

IPC: H04W48/16 ,  H04W24/10 ,  H04W24/08

CPC classification number: H04W48/16 ,  H04W16/32 ,  H04W24/08 ,  H04W24/10

Abstract: The present invention provides a radio communication method suitable for a radio communication system in which a plurality of small cells are located densely within a macro cell. The radio communication method of the present invention includes: measuring, in a user terminal (UE), radio quality in the small cells; and when a reporting condition is met, transmitting, in the user terminal, a measurement report including a measurement result. The reporting condition is defined based on a comparative result between a ratio about measurement values of radio quality of the small cells and a predetermined threshold.

Abstract translation: 本发明提供一种无线通信方法，其适用于多个小小区紧密地位于宏小区内的无线通信系统。 本发明的无线通信方法包括：在用户终端（UE）中测量小小区中的无线质量; 并且当满足报告条件时，在用户终端中发送包括测量结果的测量报告。 基于小单元的无线电质量的测量值与预定阈值的比率的比较结果来定义报告条件。

公开(公告)号：US20160249345A1

公开(公告)日：2016-08-25

申请号：US15024594

申请日：2014-09-10

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Hiroyuki Ishii

IPC: H04W72/04 ,  H04W72/12 ,  H04L5/14

CPC classification number: H04W72/0413 ,  H04L1/1671 ,  H04L1/1861 ,  H04L5/00 ,  H04L5/14 ,  H04W72/0446 ,  H04W72/12 ,  H04W72/1226 ,  H04W74/08

Abstract: The present invention is designed so that uplink transmission is carried out adequately even when CA to apply different duplex modes between multiple cells is executed. A user terminal communicates with an FDD cell and a TDD cell by employing carrier aggregation, and has a receiving section that receives DL signals transmitted from each cell, a transmission control section that allocates and transmits delivery acknowledgement signals in response to the received DL signals, channel quality information or scheduling requests in predetermined UL subframes, and, when a UL subframe is configured in both the FDD cell and the TDD cell, the transmission control section transmits a delivery acknowledgement signal in one UL subframe or both UL subframes, and controls whether or not to transmit channel quality information or a scheduling request having an overlapping transmission timing with the delivery acknowledgement signal.

Abstract translation: 本发明被设计成即使执行在多个小区之间应用不同双工模式的CA时也能够进行上行链路传输。 用户终端通过采用载波聚合与FDD小区和TDD小区进行通信，并具有接收从每个小区发送的DL信号的接收部分，响应于所接收的DL信号分配并发送传送确认信号的传输控制部分， 信道质量信息或预定UL子帧中的调度请求，并且当UL子帧配置在FDD小区和TDD小区中时，发送控制部分在一个UL子帧或两个UL子帧中发送递送确认信号，并且控制是否 或者不发送具有与发送确认信号重叠的发送定时的信道质量信息或调度请求。

公开(公告)号：US20160242158A1

公开(公告)日：2016-08-18

申请号：US15024896

申请日：2014-09-22

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Hiroki Harada ,  Satoshi Nagata ,  Hiroyuki Ishii

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00

CPC classification number: H04W72/044 ,  H04L1/18 ,  H04L1/1854 ,  H04L5/001 ,  H04L5/0055 ,  H04L5/14 ,  H04L5/1469 ,  H04W72/0413 ,  H04W72/042

Abstract: The present invention is designed to carry out uplink transmission adequately 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 that employ carrier aggregation, and has a receiving section that receives DL signals transmitted from each cell, and a feedback control section that allocates and feeds back delivery acknowledgement signals in response to the DL signals in a predetermined UL subframe, and, regardless of which cell is configured as a primary cell, the feedback control section, when transmitting only a delivery acknowledgement signal in response to the DL signal of one cell, transmits the delivery acknowledgement signal from the one cell by using a PUCCH resource that is determined from a downlink control channel resource of the DL signal, and, when transmitting delivery acknowledgement signals in response to the DL signals of both cells, transmits the delivery acknowledgement signals by using a PUCCH resource of one or both of the cells.

Abstract translation: 本发明被设计为即使当通过在多个小区之间应用不同的双工模式来执行CA时，也能充分地执行上行链路传输。 用户终端与采用载波聚合的FDD小区和TDD小区进行通信，并具有接收从每个小区发送的DL信号的接收部分，以及响应于DL信号分配并反馈传送确认信号的反馈控制部分 在预定的UL子帧中，无论哪个小区被配置为主小区，反馈控制部分在仅响应于一个小区的DL信号发送递送确认信号时，发送来自一个小区的递送确认信号 通过使用从DL信号的下行链路控制信道资源确定的PUCCH资源，并且当响应于两个小区的DL信号发送递送确认信号时，通过使用一个或两个的一个或两个的PUCCH资源发送递送确认信号 的细胞。

公开(公告)号：US20160242062A1

公开(公告)日：2016-08-18

申请号：US15024983

申请日：2014-09-19

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Hiroki Harada ,  Satoshi Nagata ,  Hiroyuki Ishii

IPC: H04W24/10 ,  H04W48/16 ,  H04W76/04 ,  H04W16/32 ,  H04L5/00

Abstract: The present invention is designed so that a small cell detection/measurement signal is introduced without making an impact on existing systems. Where a small cell (S) covered by a small base station (10) is placed within a macro cell (M) covered by a macro base station (20) and a user terminal (30) is present within the small cell, the small base station generates a detection/measurement signal for a new detection process, which is different from an existing small cell detection process using synchronization signals, and maps the detection/measurement signal to avoid the synchronization signals and transmits the detection/measurement signal to the user terminal, and the user terminal receives the detection/measurement signal from the small base station and detects the small cell.

Abstract translation: 本发明被设计成使得小单元检测/测量信号被引入而不会影响现有的系统。 在由小型基站（10）覆盖的小小区（S）被放置在由宏基站（20）覆盖的宏小区（M）内并且用户终端（30）存在于小小区内的情况下，小小区 基站产生用于新检测处理的检测/测量信号，其与使用同步信号的现有小区检测处理不同，并且映射检测/测量信号以避免同步信号并将检测/测量信号发送给用户 终端，并且用户终端从小型基站接收检测/测量信号并检测小小区。

公开(公告)号：US20160241377A1

公开(公告)日：2016-08-18

申请号：US15024702

申请日：2014-09-19

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Hiroyuki Ishii

IPC: H04L5/14 ,  H04L5/00 ,  H04L1/18 ,  H04W72/04

CPC classification number: H04L5/14 ,  H04L1/18 ,  H04L5/001 ,  H04L5/0055 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/044

Abstract: The present invention is designed so that uplink transmission is carried out adequately 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 receiving section that receives DL signals transmitted from the cells, and a feedback control section that allocates and feeds back transmission acknowledgment signals in response to each DL signal in an uplink control channel of a predetermined cell, with reference to tables in which at least the states of transmission acknowledgment signals, PUCCH resources and QPSK symbol points are associated with each other, and, in this user terminal, the tables define different contents between the FDD cell and the TDD cell, and regardless of the cell where downlink control information is detected and the cell where downlink shared data is detected, the feedback control section uses the table that corresponds to the duplex mode of the predetermined cell where the transmission acknowledgment signals are transmitted.

Abstract translation: 本发明被设计成即使当通过在多个小区之间应用不同的双工模式来执行CA时，也能够进行上行链路传输。 用户终端通过使用载波聚合与FDD小区和TDD小区通信，并具有接收从小区发送的DL信号的接收部分，以及响应于每个DL信号分配并反馈传输确认信号的反馈控制部分 参照其中传输确认信号，PUCCH资源和QPSK符号点的至少状态彼此关联的表，并且在该用户终端中，表定义了在预定小区的上行链路控制信道中不同的内容 FDD小区和TDD小区，并且不管检测到下行链路控制信息的小区和检测到下行链路共享数据的小区，反馈控制部分使用与预定小区的双工模式相对应的表，其中发送确认 发送信号。

公开(公告)号：US09414316B2

公开(公告)日：2016-08-09

申请号：US14701876

申请日：2015-05-01

Applicant: NTT DOCOMO, INC.

Inventor： Hiroyuki Ishii

IPC: H04W52/02 ,  H04W88/06 ,  H04W76/04

CPC classification number: H04W52/0241 ,  H04L5/001 ,  H04L5/0091 ,  H04L5/0098 ,  H04W24/10 ,  H04W52/0216 ,  H04W52/0229 ,  H04W52/0254 ,  H04W72/00 ,  H04W72/0406 ,  H04W76/28 ,  H04W88/06 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/146 ,  Y02D70/24

Abstract: A mobile station UE in accordance with an embodiment of the present invention is a mobile station for communicating with a radio base station using two or more carriers. The two or more carriers include a carrier in a non-discontinuous reception state and a carrier in a discontinuous reception state. The mobile station includes a first communicating unit configured to perform communications on the carrier in the non-discontinuous reception state and a second communicating unit configured to perform communications on the carrier in the discontinuous reception state. The first communicating unit treats intervals before and after an on-duration on the carrier in the discontinuous reception state as measurement gaps.

Abstract translation: 根据本发明的实施例的移动台UE是用于使用两个或更多个载波与无线电基站通信的移动站。 两个或多个载波包括非间歇接收状态的载波和不连续接收状态的载波。 移动站包括：第一通信单元，被配置为在非间歇接收状态下在载波上执行通信;第二通信单元，被配置为在不连续接收状态下对载波进行通信。 第一通信单元将不连续接收状态下的载波上的接通时间之前和之后的间隔视为测量间隙。