公开(公告)号：US20160316469A1

公开(公告)日：2016-10-27

申请号：US15032654

申请日：2014-10-17

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Huiling Jiang ,  Liu Liu ,  Qin Mu

IPC: H04W72/04 ,  H04L5/14

CPC classification number: H04W72/0446 ,  H04L1/1854 ,  H04L1/1861 ,  H04L5/0055 ,  H04L5/14 ,  H04W72/0413 ,  H04W72/042

Abstract: An uplink transmission is carried out adequately even when CA is executed by employing different duplex modes between multiple cells. A user terminal communicates with an FDD cell and a TDD cell that employ carrier aggregation, receives DL signals transmitted from each cell, detects the DL signals received, makes retransmission control decisions, and allocates and feeds back delivery acknowledgement signals in response to each DL signal in a predetermined UL subframe. When aggregating and allocating delivery acknowledgement signals for the DL signal of each cell in an uplink control channel in a UL subframe of the TDD cell, a feedback mechanism makes it possible to allocate the delivery acknowledgement signals to all DL subframes of the FDD cell, and DL signals are detected assuming the number of DL subframes of the FDD cell to be allocated to a UL subframe of the TDD cell does not exceed predetermined value.

Abstract translation: 即使通过在多个小区之间采用不同的双工模式来执行CA，也能够进行上行链路传输。 用户终端与采用载波聚合的FDD小区和TDD小区通信，接收从每个小区发送的DL信号，检测接收的DL信号，进行重发控制决定，并响应于每个DL信号分配并反馈传送确认信号 在预定的UL子帧中。 当在TDD小区的UL子帧中的上行链路控制信道中，为每个小区的DL信号进行聚合和分配递送确认信号时，反馈机制使得可以将递送确认信号分配给FDD小区的所有DL子帧，并且 假设要分配给TDD小区的UL子帧的FDD小区的DL子帧的数量不超过预定值，则检测DL信号。

公开(公告)号：US11956759B2

公开(公告)日：2024-04-09

申请号：US17372922

申请日：2021-07-12

Applicant: NTT DOCOMO, INC.

Inventor： Shinpei Yasukawa ,  Satoshi Nagata ,  Qun Zhao ,  Jing Wang ,  Huan Wang ,  Liu Liu ,  Anxin Li ,  Huiling Jiang

IPC: H04W72/02 ,  H04W4/40 ,  H04W24/10 ,  H04W74/08 ,  H04W74/0816 ,  H04W92/18

CPC classification number: H04W72/02 ,  H04W24/10 ,  H04W74/0816 ,  H04W92/18 ,  H04W4/40

Abstract: A terminal is disclosed including a selection unit that selects first resource candidates for sidelink transmission based on monitoring in a sensing window, and specifies second resource candidates by excluding specific periodic resources that are reserved by another terminal from the first resource candidates; and a transmission unit that performs sidelink transmission using a resource selected from the second resource candidates. In another aspect, a transmission method executed by a terminal is also disclosed.

公开(公告)号：US11758558B2

公开(公告)日：2023-09-12

申请号：US17533756

申请日：2021-11-23

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Chongning Na ,  Xin Wang ,  Jing Wang ,  Lihui Wang ,  Min Liu ,  Huiling Jiang

IPC: H04W72/23 ,  H04W72/0446 ,  H04W72/53

CPC classification number: H04W72/23 ,  H04W72/0446 ,  H04W72/53

Abstract: An apparatus is disclosed including a receiver that receives a downlink control information and a downlink shared channel that is scheduled by the downlink control information; a processor that determines an allocation of the downlink shared channel in a time domain based on a first timing indicated by a first time unit and a second timing indicated by a second time unit that are obtained from information notified by the downlink control information; and an output apparatus that outputs information based on the downlink shared channel, wherein the first timing is defined based on a numerology of the downlink shared channel. In other aspects, a system is also disclosed.

公开(公告)号：US11706006B2

公开(公告)日：2023-07-18

申请号：US16474701

申请日：2017-11-30

Applicant: NTT DOCOMO, INC.

Inventor： Yousuke Sano ,  Kazuki Takeda ,  Satoshi Nagata ,  Shaozhen Guo ,  Xin Wang ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W72/0446 ,  H04W72/20 ,  H04W72/04 ,  H04L5/00 ,  H04L5/10

CPC classification number: H04L5/0051 ,  H04L5/10 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/20

Abstract: A user equipment apparatus in a radio communication system in which uplink communication and downlink communication are dynamically changed includes a reception unit configured to receive, from a base station, control information indicating a resource for an uplink demodulation reference signal in a subframe used for transmitting uplink data; and a transmitting unit configured to transmit the uplink demodulation reference signal according to the control information; wherein the resource for the uplink demodulation reference signal is multiplexed into a part of resources corresponding to one or more symbols at a beginning of a data segment in the subframe used for transmitting the uplink data.

公开(公告)号：US11595997B2

公开(公告)日：2023-02-28

申请号：US15761874

申请日：2016-09-23

Applicant: NTT DOCOMO, INC.

Inventor： Hideyuki Moroga ,  Kazuaki Takeda ,  Huiling Jiang ,  Liu Liu ,  Qin Mu

IPC: H04W74/08 ,  H04W72/14 ,  H04W72/04 ,  H04L1/18 ,  H04L1/1867 ,  H04L1/1812 ,  H04W72/0453

Abstract: A user terminal is disclosed, where a band to use is limited to a partial narrow band in a system band. The user terminal includes a transmitter that transmits and/or a receiver that receives a signal, and a controller that controls repetitious reception and/or repetitious transmission of a control channel in a random access procedure based on a coverage enhancement level for a random access channel. A radio base station that communicates with a user terminal is also disclosed, where a band to use is limited to a partial narrow band in a system band. The radio base station includes a transmitter that transmits and/or a receiver that receives a signal, and a controller that controls to transmit information to make the user terminal control repetitious reception and/or repetitious transmission of a control channel in a random access procedure based on a coverage enhancement level for a random access channel.

公开(公告)号：US11457419B2

公开(公告)日：2022-09-27

申请号：US16477329

申请日：2018-01-12

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W52/36 ,  H04L5/00 ,  H04W52/34 ,  H04W72/04

Abstract: The present invention is designed so that transmission power is controlled adequately even when communication is performed using a plurality of transmission time intervals (TTIs) of varying lengths. According to one aspect of the present invention, a user terminal has a transmission section that transmits signals using a plurality of transmission time intervals (TTIs) of varying lengths, and a control section that controls the transmission power of a first signal that is transmitted in a first TTI, and the transmission power of a second signal that is transmitted in a second TTI having a shorter TTI duration than the first TTI, and, when the total transmission power of the first signal and the second signal that are transmitted in an overlapping manner exceeds the maximum transmission power, the control section exerts control so that transmission power is preferentially allocated to one of the first signal and the second signal.

公开(公告)号：US11451313B2

公开(公告)日：2022-09-20

申请号：US16495734

申请日：2018-03-21

Applicant: NTT DOCOMO, INC.

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

IPC: H04W24/00 ,  H04B7/02 ,  H04B17/309 ,  H04B7/0408 ,  H04W24/08

Abstract: Disclosed is a method for detecting radio link failure (RLF) and user equipment (UE). The UE is configured with multiples pairs of beams, each pair of beams comprising a transmitting beam used by a base station (BS) to transmit a signal and a corresponding receiving beam used by the UE to receive the signal. The method includes: in a lower layer, measuring the quality of a reference signal received through a receiving beam in each pair of beams and transmitted by a BS using a transmitting beam corresponding to the receiving beam, to serve as the channel quality for the multiple transmitting beams included in the multiple pairs of beams; determining whether the channel quality for the multiple transmitting beams meets a first condition; if so, transmitting to an upper layer an Out-Of-Sync (OOS) indication information, such that the upper layer determines if, according to the OOS indication information, RLF has occurred. As such, the present invention enables detection of RLF in a multi-beam scenario.

公开(公告)号：US11350373B2

公开(公告)日：2022-05-31

申请号：US15127671

申请日：2015-03-18

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Hiroki Harada ,  Yuichi Kakishima ,  Tooru Uchino ,  Liu Liu ,  Huiling Jiang ,  Li Zhao ,  Yong Li ,  Mugen Peng ,  Wenbo Wang

IPC: H04W52/36 ,  H04L5/00 ,  H04W52/34

Abstract: The present invention is designed to reduce the decrease of uplink throughput in the event a user terminal connects with a plurality of radio base stations. A user terminal (20) according to an example of the present invention provides a user terminal to connect with a plurality of radio base stations including at least a first radio base station and a second radio base station, and this user terminal has a PH report generating section (411) that calculates the PH (Power Headroom) of each radio base station and generates PH reports, and a transmission section (203) that transmits either the PUSCH (Physical Uplink Shared Channel) bandwidth of the first radio base station, a PH report per resource block, or information about the transmission power density, and a PH report for the first radio base station, to the second radio base station.

公开(公告)号：US11317426B2

公开(公告)日：2022-04-26

申请号：US15567638

申请日：2016-08-08

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Yuichi Kakishima ,  Xin Wang ,  Chongning Na ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W72/12 ,  H04B7/0452

Abstract: According to an aspect of the present invention, there is provided a radio resource scheduling method, wherein the method includes generating format information, wherein the format information specifies a format of resource allocation information, the format corresponding to a number of a plurality of mobile stations that simultaneously perform communication with the radio base station; generating the resource allocation information provided with the format specified by the format information corresponding to radio resources allocated to the plurality of mobile stations; and transmitting, to the plurality of mobile stations, the resource allocation information.

公开(公告)号：US11245450B2

公开(公告)日：2022-02-08

申请号：US16089098

申请日：2017-03-30

Applicant: NTT DOCOMO, INC.

Inventor： Chongning Na ,  Huiling Jiang ,  Yuichi Kakishima ,  Satoshi Nagata

IPC: H04B7/06 ,  H04B7/0417

Abstract: A terminal is disclosed that includes a processor that performs channel measurement based on a first Channel State Information-Reference Signal (CSI-RS) and performs channel measurement based on a second CSI-RS; and a transmission section that transmits a first Channel State Information (CSI) feedback based on the first CSI-RS and a second CSI feedback based on the second CSI-RS. Additionally, when the first CSI-RS is an un-precoded CSI-RS, the first CSI feedback only includes a part of information of CSI feedback based on the un-precoded CSI-RS that is a precoding matrix indicator (PMI) or are the PMI and a rank indicator (RI). In another aspect, a CSI feedback method for a terminal is also disclosed.