公开(公告)号：US20180139725A1

公开(公告)日：2018-05-17

申请号：US15579614

申请日：2016-11-04

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Satoshi Nagata ,  Qin Mu

IPC: H04W72/02 ,  H04W72/04

CPC classification number: H04W72/02 ,  H04L1/08 ,  H04L1/1893 ,  H04L5/0032 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0064 ,  H04L5/0082 ,  H04L5/0091 ,  H04L27/2602 ,  H04W72/042 ,  H04W72/044 ,  H04W72/1289

Abstract: The present invention is designed so that the overhead of communication can be reduced even when the band for use is limited to a narrower band than the minimum system bandwidth in existing LTE systems. A user terminal has a transmitting/receiving section that transmits and receives signals to and from a radio base station based on a pattern that is comprised of a plurality of radio resources, and a control section that determines the pattern from a plurality of patterns based on user terminal-specific information.

公开(公告)号：US09913294B2

公开(公告)日：2018-03-06

申请号：US14889329

申请日：2014-04-14

Applicant: NTT DOCOMO, INC.

Inventor： Yoshihisa Kishiyama ,  Qin Mu ,  Liu Liu ,  Lan Chen

IPC: H04W74/08 ,  H04B17/318 ,  H04W4/00 ,  H04L5/00

CPC classification number: H04W74/08 ,  H04B17/318 ,  H04L5/0053 ,  H04W4/70

Abstract: A radio communication system includes a radio base station and a terminal device. The radio base station and the terminal device share correspondence information about subsets of preamble sequences obtained by segmenting preamble sequences available in the radio communication systems into groups, each of the subsets being associated with a received signal level at the terminal device and a number of repetitions for transmitting the preamble sequences of each of the subsets. Based upon a receive level of a signal transmitted from the radio base station, the terminal device selects a subset corresponding to the receive level by referring to the correspondence information and transmits a preamble sequence included in the selected subset at the number of repetitions associated with the selected subset.

公开(公告)号：US09882694B2

公开(公告)日：2018-01-30

申请号：US14439922

申请日：2013-10-28

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Qin Mu ,  Liu Liu ,  Lan Chen

IPC: G01R31/08 ,  H04L5/14 ,  H04B7/00 ,  H04J3/00 ,  H04L5/00 ,  H04W72/04 ,  H04B7/0452

CPC classification number: H04L5/0053 ,  H04B7/0452 ,  H04L5/0094 ,  H04W72/042 ,  H04W72/0453

Abstract: In order to enable notification of radio resources that make up an enhanced downlink control channel, a radio base station that transmits downlink control information for a user terminal using an enhanced downlink control channel frequency-division-multiplexed with a downlink shared data channel is provided. The radio base station includes a configuring section that configures the user terminal with a resource set including a plurality of resource blocks allocated to the enhanced downlink control channel; and a notifying section that notify the user terminal of pattern information of the resource blocks that make up the resource set and information indicating a number (n) of resource blocks that make up the resource set.

公开(公告)号：US20180014219A1

公开(公告)日：2018-01-11

申请号：US15543840

申请日：2016-01-21

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Shimpei Yasukawa ,  Satoshi Nagata ,  Hideyuki Moroga ,  Liu Liu ,  Qin Mu

IPC: H04W24/10 ,  H04W72/04 ,  H04W72/08 ,  H04W72/14 ,  H04W88/02

CPC classification number: H04W24/10 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/08 ,  H04W72/14 ,  H04W88/02

Abstract: The present invention is designed to measure and/or report CSI (Channel State Information) of a plurality of narrow bands, even when the band to use is limited to a partial narrow band in a system band. According to one aspect of the present invention, a user terminal, in which the band to use is limited to a partial narrow band in a system band, has a receiving section that receives information related to CSI (Channel State Information) measurement in a narrow band, a measurement section that measures CSIs in a plurality of narrow bands based on the information related to CSI measurement, and a transmission section that reports the measured CSIs.

公开(公告)号：US20180007585A1

公开(公告)日：2018-01-04

申请号：US15543657

申请日：2016-01-27

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Shimpei Yasukawa ,  Satoshi Nagata ,  Hideyuki Moroga ,  Liu Liu ,  Qin Mu

IPC: H04W28/18 ,  H04W72/04 ,  H04W4/00

Abstract: The present invention is designed so that broadcast information is transmitted and received adequately even when the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth and the broadcast information is transmitted and received in repetitions over multiple subframes. A user terminal, in which the bandwidth to use is limited to a partial reduced bandwidth in a system bandwidth, has a receiving section that receives first system information and second system information, and a control section that acquires transmission information, which includes the repetition factor for the second system information, from the first system information, and the receiving section receives the second system information based on the transmission information.

公开(公告)号：US09439181B2

公开(公告)日：2016-09-06

申请号：US14355645

申请日：2012-11-08

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Liu Liu ,  Lan Chen ,  Qin Mu ,  Wenbo Wang

IPC: G01R31/08 ,  H04W72/04 ,  H04W72/12 ,  H04L5/00 ,  H04L5/14 ,  H04J3/00

CPC classification number: H04W72/042 ,  H04J3/00 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/0094 ,  H04L5/1469 ,  H04W72/1289

Abstract: According to the present invention, even when the ratio between uplink subframes and downlink subframes is changed in each component carrier in TDD carrier aggregation, it is still possible to prevent a decrease in capacity. With the radio communication method according to the present invention, a radio base station apparatus generates a downlink control channel signal containing downlink control information including carrier indicator field information, and transmits the downlink control channel signal to a user terminal, and the user terminal receives the downlink control channel signal, and executes signal processing with respect to the downlink signal in accordance with the downlink control information. In this case, the carrier indicator field information is information which associates a carrier index and the index of a secondary cell subframe to be scheduled.

Abstract translation: 根据本发明，即使在TDD载波聚合中每个分量载波中上行子帧与下行子帧之间的比例发生变化的情况下，仍然可以防止容量的降低。 根据本发明的无线通信方法，无线基站装置生成包含载波指示符字段信息的下行链路控制信息的下行控制信道信号，向用户终端发送下​​行控制信道信号，用户终端接收 下行链路控制信道信号，并且根据下行链路控制信息执行关于下行链路信号的信号处理。 在这种情况下，载波指示符字段信息是将载波索引与要调度的二次小区子帧的索引相关联的信息。

公开(公告)号：US20160242061A1

公开(公告)日：2016-08-18

申请号：US15024865

申请日：2014-09-04

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Liu Liu ,  Qin Mu ,  Lan Chen ,  Lihui Wang ,  Yong Li ,  Mugen Peng ,  Wenbo Wang

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

CPC classification number: H04W24/10 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0073 ,  H04L5/0098 ,  H04W72/0413 ,  H04W72/042 ,  H04W84/045

Abstract: The present invention is designed so that, in a radio communication system in which a plurality of component carriers (CCs) are used in each small cell within a macro cell, the load of measurements, the amount of information to report and so on in user terminals are reduced. The macro base station of the present invention transmits, to a user terminal, measurement indication information that includes a measurement indication for the received power of a measurement signal of a specific CC in each small cell, and receives, from the user terminal, a measurement report that includes the received power of the measurement signal of the specific CC. Also, the macro base station calculates the received quality of the measurement signals of the plurality of CCs based on the received power of the measurement signal of the specific CC.

Abstract translation: 本发明被设计为使得在其中在宏小区内的每个小小区中使用多个分量载波（CC）的无线电通信系统中，测量的负载，用户要报告的信息量等 端子减少。 本发明的宏基站向用户终端发送包含每个小小区中特定CC的测量信号的接收功率的测量指示的测量指示信息，并从用户终端接收测量 报告包括特定CC的测量信号的接收功率。 此外，宏基站基于特定CC的测量信号的接收功率来计算多个CC的测量信号的接收质量。

公开(公告)号：US20160157213A1

公开(公告)日：2016-06-02

申请号：US14896928

申请日：2014-05-27

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Qin Mu ,  Liu Liu ,  Lan Chen

IPC: H04W72/04 ,  H04L1/18

CPC classification number: H04W72/042 ,  H04L1/1812 ,  H04L1/1822 ,  H04L1/1893 ,  H04L1/1896 ,  H04W72/0446 ,  H04W88/08

Abstract: In order to perform HARQ processing for downlink shared data efficiently even when control information for the downlink shared data allocated to a plurality of subframes is allocated to a particular subframe, the present invention provides a radio communication method for allocating control information for downlink shared data allocated to a plurality of subframes to a specific subframe and transmitting the control information to a user terminal. The control information is generated by including more than 3-bit bit information for specifying identification information of each HARQ process, the control information is mapped to the specific subframe, and the control information and the downlink shared data are transmitted to the user terminal.

Abstract translation: 即使将分配给多个子帧的下行链路共享数据的控制信息分配给特定子帧，为了对下行链路共享数据进行HARQ处理，本发明提供一种无线通信方法，用于为分配的下行链路共享数据分配控制信息 到特定子帧的多个子帧，并将控制信息发送给用户终端。 通过包括用于指定每个HARQ处理的识别信息的3比特比特信息来生成控制信息，将控制信息映射到特定子帧，并且控制信息和下行链路共享数据被发送到用户终端。

公开(公告)号：US20150365181A1

公开(公告)日：2015-12-17

申请号：US14763611

申请日：2014-01-20

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Yu Jiang ,  Lan Chen

IPC: H04B17/309 ,  H04L1/00 ,  H04L27/34 ,  H04W72/04

CPC classification number: H04B17/309 ,  H04L1/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/1812 ,  H04L27/34 ,  H04W72/0413

Abstract: The present invention is designed to make possible adaptive modulation and coding (AMC) that supports high-order modulation schemes. The adaptive modulation and coding method of the present invention is an adaptive modulation and coding method for a downlink shared channel, and includes, in a user terminal, the steps of measuring channel quality based on a reference signal from the radio base station, acquiring a channel quality indicator to indicate the modulation scheme and the coding rate that are applicable to the downlink shared channel in the channel quality, from a table in which channel quality indicators, modulation schemes and coding rates are associated with each other, and transmitting the channel quality indicator to the radio base station, and the modulation schemes include a modulation scheme of a higher order than 64 QAM.

Abstract translation: 本发明被设计成能够实现支持高阶调制方案的自适应调制和编码（AMC）。 本发明的自适应调制编码方法是用于下行链路共享信道的自适应调制编码方法，在用户终端中包括基于来自无线基站的基准信号测量信道质量的步骤，获取 信道质量指示符，从信道质量指示符，调制方式和编码率彼此相关联的表中指示适用于信道质量中的下行链路共享信道的调制方案和编码率，以及发送信道质量 指示符到无线电基站，并且调制方案包括比64QAM高的调制方案。

公开(公告)号：US20150117353A1

公开(公告)日：2015-04-30

申请号：US14399982

申请日：2013-05-10

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Qin Mu ,  Liu Liu ,  Lan Chen

IPC: H04W72/04

CPC classification number: H04W72/042 ,  H04B7/0617 ,  H04B7/0619 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0094

Abstract: The blind decoding method disclosed herein is a blind decoding method to allow a user terminal to blind-decode downlink control information that is transmitted from a radio base station using at least one of a legacy PDCCH and an enhanced PDCCH that is frequency-division-multiplexed with a PDSCH, and includes the steps in which the radio base station reports information for configuring a number of candidates, which information is used to configure numbers of search space candidates for the legacy PDCCH and numbers of search space candidates for the enhanced PDCCH, to the user terminal, and the user terminal blind-decodes the downlink control information based on the numbers of search space candidates for the legacy PDCCH and the numbers of search space candidates for the enhanced PDCCH that are configured based on the candidate quantity configuration information.

Abstract translation: 本文公开的盲解码方法是一种盲解码方法，用于允许用户终端使用传统PDCCH和经多路复用的增强型PDCCH中的至少一种对从无线基站发送的下行链路控制信息进行盲解码 并且包括以下步骤：其中无线电基站报告用于配置候选数量的信息，该信息用于配置传统PDCCH的搜索空间候选数和用于增强型PDCCH的搜索空间候选的数量， 用户终端和用户终端基于用于传统PDCCH的搜索空间候选的数目和基于候选数量配置信息配置的增强型PDCCH的搜索空间候选的数目，对下行链路控制信息进行盲解码。