公开(公告)号：US20200053738A1

公开(公告)日：2020-02-13

申请号：US16496211

申请日：2017-03-23

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Satoshi Nagata ,  Jing Wang ,  Liu Liu

IPC: H04W72/08 ,  H04L5/00 ,  H04B7/06 ,  H04W56/00 ,  H04W24/10

Abstract: The present invention is designed to configure RRM measurement properly. A user terminal according to one aspect of the present invention has a receiving section that receives information about a parameter that is common among a plurality of resources for a reference signal, and a control section that controls, based on information about the parameter, reporting of results of measurement using the reference signal in part of the plurality of resources, and information about measured resources.

公开(公告)号：US20190090251A1

公开(公告)日：2019-03-21

申请号：US15762962

申请日：2016-09-23

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Satoshi Nagata ,  Jing Wang ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/08 ,  H04L5/00 ,  H04W48/08

Abstract: A radio base station that communicates with a user terminal by using a plurality of component carriers (CCs) in which listening is configured, includes a transmitter that transmits downlink (DL) signals in each CC; and a processor that controls transmission of the DL signals in each CC based on a result of the listening in the plurality of CCs. The processor controls allocation of power based on a total number of CCs that make transmission in each subframe after the listening.

公开(公告)号：US20170280448A1

公开(公告)日：2017-09-28

申请号：US15514012

申请日：2015-09-25

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Jing Wang ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/04 ,  H04L5/14 ,  H04L1/18 ,  H04W74/08

CPC classification number: H04W72/0446 ,  H04L1/1854 ,  H04L1/1861 ,  H04L5/14 ,  H04L5/1469 ,  H04W16/14 ,  H04W74/0808

Abstract: In order to prevent deterioration in communication quality even when LBT applies to UL transmission, the present invention provides a user terminal that has: a transmission section that transmits a transmission acknowledgement signal for a DL (downlink) data signal transmitted from a radio base station; and a control section that controls transmission of the transmission acknowledgement signal based on an LBT (Listen Before Talk) result in uplink. When transmitting the transmission acknowledgement signal in a given UL (uplink) subframe, the control section determines a feedback timing of the transmission acknowledgement signal in accordance with the LBT result in a UL subframe prior to the given UL subframe.

公开(公告)号：US20160269940A1

公开(公告)日：2016-09-15

申请号：US15032751

申请日：2014-10-17

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Jing Wang ,  Liu Liu ,  Yu Jiang ,  Huiling Jiang

IPC: H04W28/16 ,  H04W24/02 ,  H04W88/12

CPC classification number: H04W28/16 ,  H04W24/02 ,  H04W88/02 ,  H04W88/08 ,  H04W88/12

Abstract: The present invention is designed to reduce the decrease of system performance when coordinated multi-point transmission is carried out to a user terminal. The central control station of the present invention provides a central control station that is connected with a plurality of radio base stations that carry out coordinated multi-point transmission to a user terminal, and this central control station has a reporting information generating section that generates, for each radio base station, information about radio resources allocated to other radio base stations that carry out coordinated multi-point transmission, and a reporting section that reports the information about the radio resources, generated in the reporting information generating section, to each radio base station.

Abstract translation: 本发明旨在减少对用户终端进行协调的多点传输时的系统性能的降低。 本发明的中央控制站提供了与向用户终端进行协调的多点传输的多个无线基站连接的中央控制站，该中央控制站具有报告信息生成部， 对于每个无线基站，分配给执行协调的多点传输的其他无线基站的无线资源的信息，以及报告单元，将报告信息生成部生成的关于无线资源的信息报告给各无线基站 站。

公开(公告)号：US20150215022A1

公开(公告)日：2015-07-30

申请号：US14410973

申请日：2013-06-24

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Jing Wang ,  Xiang Yun ,  Lan Chen

IPC: H04B7/06 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04B7/0626 ,  H04L5/001 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/0073 ,  H04L5/0094 ,  H04W72/0413

Abstract: To make it possible to feed back channel state information adequately even when a plurality of pieces of channel state information are generated in a user terminal, a user terminal that is configured to be able to conduct coordinated multi-point transmission/reception with a plurality of radio base stations has a generating section that generates a plurality of kinds of channel state information using channel state measurement reference signals transmitted from each radio base station, a selection section that selects predetermined channel state information to feed back, from the plurality of kinds of channel state information, and a transmission section that feeds back the predetermined channel state information to the radio base station via an uplink control channel, and the selection section selects the predetermined channel state information based at least on the priorities assigned to the resource indices of channel state measurement reference signals corresponding to each channel state information.

Abstract translation: 即使在用户终端中生成多条信道状态信息的情况下，即使在用户终端中生成多条信道状态信息也能充分反馈信道状态信息，被配置为能够进行协调的多点发送/接收的用户终端 无线基站具有生成部，其使用从各无线基站发送的信道状态测定基准信号生成多种信道状态信息，选择部，从多种信道中选择预定的信道状态信息进行反馈; 状态信息，以及通过上行链路控制信道将预定的信道状态信息反馈给无线基站的发送部，至少基于分配给信道状态的资源索引的优先级来选择规定的信道状态信息 与每个通道对应的测量参考信号 状态信息。

公开(公告)号：US20150043477A1

公开(公告)日：2015-02-12

申请号：US14387058

申请日：2013-03-22

Applicant: NTT Docomo, Inc.

Inventor： Satoshi Nagata ,  Jing Wang ,  Xiang Yun ,  Lan Chen

IPC: H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L5/00

CPC classification number: H04B7/0417 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/065 ,  H04B7/066 ,  H04J11/0053 ,  H04L1/0026 ,  H04L1/0028 ,  H04L5/001 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0073 ,  H04L5/0085 ,  H04W72/1226

Abstract: The present invention is designed to suitably feed back each CoMP cell's channel state information when CoMP transmission is applied. In a radio communication system providing a plurality of radio base station apparatuses and a user terminal that is configured to be able to perform coordinated multiple-point transmission/reception with the plurality of radio base station apparatuses, the user terminal has an acquiring section that acquires channel state information of each of multiple cells, a generating section that generates feedback information such that at least part of the acquired channel state information of the multiple cells is combined and transmitted in the same subframe, and a transmission section that periodically feeds back the generated feedback information to a radio base station apparatus, which is one of multiple coordinated points, using a physical uplink control channel, and the radio base station apparatus has an updating section that updates the channel state information using the channel state information that is fed back from the user terminal.

Abstract translation: 本发明被设计为当应用CoMP传输时适当地反馈每个CoMP信元的信道状态信息。 在提供多个无线基站装置的无线通信系统和被配置为能够与多个无线基站装置进行协调的多点发送/接收的用户终端中，用户终端具有获取部 信道状态信息，生成部，其生成反馈信息，使得所述多个小区的所获取的信道状态信息的至少一部分在同一子帧中被组合和发送;发送部，周期性地反馈生成的 使用物理上行链路控制信道向作为多个协调点之一的无线基站装置发送反馈信息，无线基站装置具有更新部，其使用从 用户终端。

公开(公告)号：US20150029888A1

公开(公告)日：2015-01-29

申请号：US14384519

申请日：2013-03-12

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Jing Wang ,  Xiang Yun ,  Lan Chen

IPC: H04B7/06

CPC classification number: H04B7/0632 ,  H04B7/024 ,  H04B7/0641 ,  H04B7/065 ,  H04B7/0689 ,  H04L1/0026 ,  H04L1/0039 ,  H04L5/0035 ,  H04L5/0057

Abstract: The present invention is designed to prevent the increase of the overhead of feedback information, and furthermore improve the accuracy of updated CQIs, upon updating CQIs that are given as feedback, when CoMP transmission is applied. The radio communication system of the present invention is formed with a plurality of radio base station apparatuses and a user terminal that is configured to be able to perform coordinated multiple-point transmission/reception with the plurality of radio base station apparatuses and, in this radio communication system, the user terminal calculates a channel quality indicator for coordinated multiple-point transmission using an interference component ratio between cells and feeds back the channel quality indicator, and the radio base station apparatus re-calculates a channel quality indicator in accordance with a transmission mode of coordinated multiple-point transmission, using the channel quality indicator fed back from the user terminal.

Abstract translation: 本发明被设计为当应用CoMP传输时，在更新作为反馈给出的CQI时，防止反馈信息的开销的增加，并且进一步提高更新的CQI的精度。 本发明的无线通信系统由多个无线基站装置和用户终端形成，该无线基站装置和用户终端能够与多个无线基站装置进行协调的多点发送/接收，并且在该无线电 通信系统中，用户终端使用小区之间的干扰分量比计算用于协调多点传输的信道质量指示符，并反馈信道质量指示符，并且无线基站装置根据传输重新计算信道质量指标 协调多点传输模式，使用从用户终端反馈的信道质量指示符。

公开(公告)号：US20250158771A1

公开(公告)日：2025-05-15

申请号：US18834543

申请日：2022-02-03

Applicant: NTT DOCOMO, INC.

Inventor： Yuki Matsumura ,  Naoya Shibaike ,  Satoshi Nagata ,  Jing Wang

IPC: H04L5/00 ,  H04L27/26

Abstract: A terminal according to an aspect of the present disclosure includes a control section that uses a first orthogonal cover code for any one of not more than eight DMRS ports for a demodulation reference signal (DMRS) configuration type 1 and not more than 12 DMRS ports for a DMRS configuration type 2, and uses a second orthogonal cover code for any one of more than eight DMRS ports for the DMRS configuration type 1 and more than 12 DMRS ports for the DMRS configuration type 2, and a transmitting/receiving section that transmits or receives DMRSs using the DMRS ports. According to an aspect of the present disclosure, the suitable number of DMRS ports can be used.

公开(公告)号：US12302121B2

公开(公告)日：2025-05-13

申请号：US17789425

申请日：2020-01-24

Applicant: NTT DOCOMO, INC.

Inventor： Yuki Matsumura ,  Satoshi Nagata ,  Jing Wang ,  Shaozhen Guo ,  Xiaolin Hou

IPC: H04W16/28 ,  H04L5/00

Abstract: A terminal according to an aspect of the present disclosure includes: a receiving section that receives information indicating a spatial relation between a reference reference signal (RS) and a target RS with respect to uplink (UL) and downlink (DL) transmission configuration indication (TCI) states; and a control section that controls to apply the TCI states to a UL channel and the target RS based on the information. According to the aspect of the present disclosure, appropriate UL transmission can be implemented.

公开(公告)号：US20250151052A1

公开(公告)日：2025-05-08

申请号：US18835917

申请日：2022-02-10

Applicant: NTT DOCOMO, INC.

Inventor： Yuki Matsumura ,  Satoshi Nagata ,  Jing Wang ,  Lan Chen

IPC: H04W72/1268 ,  H04W72/232

Abstract: A terminal according to an aspect of the present disclosure includes: a receiving section that receives first downlink control information for scheduling a first UL channel and second downlink control information for scheduling a second UL channel; and a control section that controls at least one of application of first UE operation related to transmission of the first channel and transmission of the second channel in a time domain and application of second UE operation related to order of transmission of each of the downlink control information and each of the UL channels, based on whether or not respective panels or transmission/reception points (TRPs) corresponding to the first downlink control information and the second downlink control information are same.