公开(公告)号：US20160242060A1

公开(公告)日：2016-08-18

申请号：US15024366

申请日：2014-08-22

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Satoshi Nagata ,  Yoshihisa Kishiyama

IPC: H04W24/10 ,  H04B7/04 ,  H04W72/12 ,  H04L5/00

Abstract: A base station that communicates with a mobile station by using a plurality of antenna ports includes a mapping information communication unit configured to generate mapping of reference signals for measuring channel state information of the antenna ports by combining, within a resource block, mappings of reference signals for measuring the channel state information, the mappings being defined for a predetermined number or less of the antenna ports, and configured to communicate information indicating the generated mapping to the mobile station; a multiplexer configured to multiplex the reference signals for measuring the channel state information in one or more resource elements in the resource block in accordance with the generated mapping; and a transmitter configured to transmit the reference signals for measuring the channel state information.

Abstract translation: 通过使用多个天线端口与移动台通信的基站包括映射信息通信单元，被配置为通过在资源块内组合参考信号的映射来生成用于测量天线端口的信道状态信息的参考信号的映射 用于测量所述信道状态信息，所述映射被定义为预定数量或更少的所述天线端口，并且被配置为将指示所生成的映射的信息传送到所述移动站; 多路复用器，被配置为根据生成的映射，多路复用用于测量资源块中的一个或多个资源元素中的信道状态信息的参考信号; 以及发送器，被配置为发送用于测量信道状态信息的参考信号。

公开(公告)号：US20160227492A1

公开(公告)日：2016-08-04

申请号：US15024883

申请日：2014-09-16

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Kazuki Takeda ,  Tooru Uchino ,  Hideaki Takahashi

IPC: H04W52/34 ,  H04W72/08 ,  H04W72/02

CPC classification number: H04W52/346 ,  H04L5/001 ,  H04W52/146 ,  H04W52/281 ,  H04W52/34 ,  H04W72/02 ,  H04W72/085

Abstract: The present invention is designed to enable adequate transmission power control when inter-base station CA is employed. The present invention is designed so that, when inter-base station CA is employed and the transmission power of a user terminal reaches the maximum transmission power, the user terminal executes transmission power control by carrying out power scaling autonomously. For example, the user terminal has a transmission section that transmits an uplink physical channel in each component carrier, and a control section that switches, over time, the component carrier to which the uplink physical channel is transmitted preferentially.

Abstract translation: 本发明被设计成当采用基站间CA时能够进行适当的发送功率控制。 本发明被设计成当使用基站间CA并且用户终端的发送功率达到最大发送功率时，用户终端通过自主地执行功率调整来执行发送功率控制。 例如，用户终端具有在每个分量载波中发送上行链路物理信道的发送部，以及随时间切换优先发送上行链路物理信道的分量载波的控制部。

公开(公告)号：US09391682B2

公开(公告)日：2016-07-12

申请号：US14771219

申请日：2014-02-18

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Satoshi Nagata ,  Anass Benjebbour ,  Xiang Yun ,  Yu Jiang ,  Lan Chen ,  Ozgun Bursalioglu

IPC: H04B7/02 ,  H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0478 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0473 ,  H04B7/061 ,  H04B7/0617 ,  H04B7/0639

Abstract: Techniques for providing codebooks extended by gain information that can be transmitted in a reduced amount of signaling are disclosed. A user equipment includes a transmission and reception unit communicating a radio signal with a base station in accordance with MIMO (Multiple Input Multiple Output) transmission and a codebook storage unit stores predefined codebooks to specify precoding matrices for use in the MIMO transmission. The codebooks are arranged to represent phase information and gain information and a channel measurement unit measures channel conditions based on reference signals transmitted from multiple antennas in the base station. A codebook selection unit selects a codebook to be indicated to the base station from the stored codebooks based on the measured channel conditions and instructs the transmission and reception unit to indicate feedback information to the base station and the feedback information includes a codebook index for identifying the selected codebook.

Abstract translation: 公开了用于提供可以以减少的信令量发送的增益信息进行扩展的码本的技术。 用户设备包括根据MIMO（多输入多输出）传输将无线电信号与基站通信的发送和接收单元，并且码本存储单元存储预定码本，以指定在MIMO传输中使用的预编码矩阵。 码本被布置为表示相位信息和增益信息，并且信道测量单元基于从基站中的多个天线发送的参考信号来测量信道条件。 码本选择单元根据所测量的信道条件从所存储的码本中选择要从基站指示的码本，并且指示发送和接收单元向基站指示反馈信息，并且反馈信息包括用于识别基站的码本索引 所选码本。

公开(公告)号：US20150078289A1

公开(公告)日：2015-03-19

申请号：US14399048

申请日：2013-04-19

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Yoshihisa Kishiyama ,  Satoshi Nagata ,  Kazuaki Takeda

IPC: H04L5/00

CPC classification number: H04L5/0048 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0094 ,  H04W16/32 ,  H04W72/04

Abstract: The present invention is designed to realize signaling of DM-RS sequence parameters for improving the flexibility of allocation of DM-RS resources in a system having complex cell structures. According to the radio communication method of the present invention, in a radio communication system supporting a system band formed with a plurality of component carriers by carrier aggregation, a radio base station apparatus allocates uplink DM-RS sequences per mobile terminal apparatus and per component carrier, and reports DM-RS sequence allocation information, and a mobile terminal apparatus generates DM-RS sequences using the allocation information reported from the radio base station apparatus.

Abstract translation: 本发明旨在实现DM-RS序列参数的信令，从而提高具有复杂小区结构的系统中DM-RS资源分配的灵活性。 根据本发明的无线通信方法，在通过载波聚合支持形成有多个分量载波的系统频带的无线通信系统中，无线基站装置根据移动终端装置和每个分量载波分配上行DM-RS序列 并且报告DM-RS序列分配信息，并且移动终端设备使用从无线基站装置报告的分配信息来生成DM-RS序列。

公开(公告)号：US12113591B2

公开(公告)日：2024-10-08

申请号：US17613445

申请日：2019-05-31

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Yuki Matsumura

IPC: H04B7/0426 ,  H04W16/28 ,  H04W56/00

CPC classification number: H04B7/043 ,  H04W16/28 ,  H04W56/001

Abstract: User equipment includes a control unit configured to determine a spatial reception parameter of a channel, based on quasi co-location (QCL) information related to a synchronization signal or a reference signal; and a reception unit configured to receive the channel based on the determined spatial reception parameter. In the QCL information, a QCL parameter applied to a source signal is partially or entirely different from a QCL parameter applied to a destination signal.

公开(公告)号：US11792751B2

公开(公告)日：2023-10-17

申请号：US17057157

申请日：2018-05-21

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Hideaki Takahashi ,  Yuichi Kakishima ,  Kazuaki Takeda ,  Kazuki Takeda

IPC: H04W56/00 ,  H04L5/00 ,  H04W72/0453 ,  H04W72/23

CPC classification number: H04W56/001 ,  H04L5/0051 ,  H04W72/0453 ,  H04W72/23

Abstract: To appropriately control communication using at least one of a synchronization signal block and a reference signal even when communication is performed using a BWP, according to one aspect of the present disclosure, there is provided a user terminal including: a receiving section that receives at least one of a synchronization signal block and a given reference signal in a given bandwidth part (BWP); and a control section that decides whether to apply a synchronization signal block to a specific operation based on at least one of information regarding a frequency position of a synchronization signal block commonly reported by a serving cell and information regarding a frequency position of a synchronization signal block in the BWP.

公开(公告)号：US11729764B2

公开(公告)日：2023-08-15

申请号：US17045000

申请日：2018-04-05

Applicant: NTT DOCOMO, INC.

Inventor： Yuki Matsumura ,  Hideyuki Moroga ,  Satoshi Nagata ,  Yuichi Kakishima

IPC: H04W72/1268 ,  H04B1/713 ,  H04L5/00

CPC classification number: H04W72/1268 ,  H04B1/713 ,  H04L5/0048 ,  H04L5/0078 ,  H04L5/0098 ,  H04B2201/698

Abstract: A terminal is disclosed including a processor that assumes a position of an additional demodulation reference signal (DMRS) based on a value corresponding to whether frequency hopping is enabled or disabled; and a transmitter that transmits the additional DMRS according to an allocation duration of an uplink shared channel (PUSCH). In other aspects, a radio communication method and a base station are also disclosed.

公开(公告)号：US11671216B2

公开(公告)日：2023-06-06

申请号：US16970241

申请日：2018-02-16

Applicant: NTT DOCOMO, INC.

Inventor： Hideyuki Moroga ,  Yuki Matsumura ,  Kazuki Takeda ,  Satoshi Nagata ,  Yuichi Kakishima

IPC: H04L5/00 ,  H04J13/18 ,  H04L5/10 ,  H04L27/26 ,  H04W72/0446 ,  H04W72/0453

CPC classification number: H04L5/0012 ,  H04J13/18 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/10 ,  H04L27/2605 ,  H04L27/2613 ,  H04L27/26035 ,  H04L27/26132 ,  H04W72/0446 ,  H04W72/0453 ,  H04L27/261

Abstract: A radio transmission device includes a transmitter (209) and a controller (203). The transmitter (209) transmits a radio signal in which a demodulation reference signal is mapped. When a plurality of the demodulation reference signals are to be mapped respectively to first and second unit resources consecutive in a time domain of the radio signal, the controller (203) applies the same sequence to each of the plurality of the demodulation reference signals to be mapped to the first and the second unit resources.

公开(公告)号：US11575477B2

公开(公告)日：2023-02-07

申请号：US16982259

申请日：2018-03-30

Applicant: NTT DOCOMO, INC.

Inventor： Hideyuki Moroga ,  Satoshi Nagata ,  Yuichi Kakishima

IPC: H04L5/00 ,  H04L27/26 ,  H04B1/713

Abstract: User equipment for communicating with a base station includes a processing unit, wherein when transmitting a physical uplink shared channel (PUSCH) to the base station prior to establishment of a radio resource control (RRC) connection between the base station and the user equipment, the processing unit controls frequency hopping applied to the PUSCH and a demodulation reference signal; a reception unit for receiving from the base station information indicating that frequency hopping is applied to the PUSCH; and a transmission unit for transmitting the PUSCH and the demodulation reference signal to which frequency hopping is applied; wherein the demodulation reference signal for demodulating a single PUSCH is formed of one front-loaded demodulation reference signal and one additional demodulation reference signal, and when the duration in symbols of the PUSCH does not support one additional demodulation reference signal, the demodulation reference signal is formed of a front-loaded demodulation reference signal.

公开(公告)号：US20220407653A1

公开(公告)日：2022-12-22

申请号：US17793157

申请日：2020-01-31

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Yousuke Sano

IPC: H04L5/00 ,  H04W76/15 ,  H04W72/04

Abstract: A terminal includes a reception unit configured to receive a reference signal of a first RAT (Radio Access Technology); and a control unit configured to decode data of a second RAT using the reference signal.