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：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：US20140348096A1

公开(公告)日：2014-11-27

申请号：US14357579

申请日：2012-11-22

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Xiang Yun ,  Xiaoming She ,  Lan Chen

IPC: H04W72/12 ,  H04B7/02

CPC classification number: H04W72/1247 ,  H04B7/024 ,  H04B7/0632 ,  H04B7/0639 ,  H04L5/0035 ,  H04L5/0075 ,  H04W48/20

Abstract: The present invention is designed to provide a radio communication system, a radio base station apparatus and a radio communication method which can realize high transmission rate while reducing the calculation load involved in CoMP scheduling. The present invention provides a radio communication system including 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 radio base station apparatus has: an operation section (420) that calculates the priority of a pattern to be a candidate for radio resource allocation, which is determined based on candidate cell information that is reported from the user terminal and that shows a candidate of a cell to perform coordinated multiple point transmission; and a scheduling section (421) that executes scheduling based on the priority calculated in the operation section; and the user terminal has: a reporting section that reports the candidate cell information to the radio base station apparatus.

Abstract translation: 本发明旨在提供一种在减少CoMP调度涉及的计算负担的同时实现高传输速率的无线通信系统，无线基站装置和无线通信方法。 本发明提供一种无线通信系统，包括多个无线基站装置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，在该无线通信系统 ：无线基站装置具有：运算部（420），其计算作为无线资源分配候选的模式的优先级，该模式是根据从用户终端报告并显示候选的候选小区信息确定的 执行协调的多点传输; 以及调度部（421），其基于在所述操作部中计算出的优先级来执行调度; 并且用户终端具有：向无线基站装置报告候选小区信息的报告部。

公开(公告)号：US09742534B2

公开(公告)日：2017-08-22

申请号：US14442260

申请日：2013-10-23

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Mingju Li ,  Xiang Yun ,  Lan Chen

IPC: H04L5/00 ,  H04W16/28 ,  H04W48/08 ,  H04W72/04 ,  H04L12/741 ,  H04W72/12

CPC classification number: H04L5/0035 ,  H04L5/0051 ,  H04L45/745 ,  H04W16/28 ,  H04W48/08 ,  H04W72/042 ,  H04W72/0453 ,  H04W72/1273

Abstract: A radio communication system including a plurality of radio base stations and a user terminal that is capable of coordinated multiple point transmission with the plurality of radio base stations is provided, and, in this radio communication system, a radio base station has a generating section that generates parameter information related to downlink signals, a control information generating section that generates downlink control information that includes an indicator to represent specific parameter information, a control section that controls whether or not to configure a bit field for the indicator of the parameter information in the downlink control information, and a transmission section that transmits information as to whether or not the bit field for the indicator of the parameter information is configured, to the user terminal, by higher layer signaling.

公开(公告)号：US20160254888A1

公开(公告)日：2016-09-01

申请号：US14442260

申请日：2013-10-23

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Mingju Li ,  Xiang Yun ,  Lan Chen

IPC: H04L5/00 ,  H04W72/12 ,  H04L12/741 ,  H04W72/04

CPC classification number: H04L5/0035 ,  H04L5/0051 ,  H04L45/745 ,  H04W16/28 ,  H04W48/08 ,  H04W72/042 ,  H04W72/0453 ,  H04W72/1273

Abstract: A radio communication system including a plurality of radio base stations and a user terminal that is capable of coordinated multiple point transmission with the plurality of radio base stations is provided, and, in this radio communication system, a radio base station has a generating section that generates parameter information related to downlink signals, a control information generating section that generates downlink control information that includes an indicator to represent specific parameter information, a control section that controls whether or not to configure a bit field for the indicator of the parameter information in the downlink control information, and a transmission section that transmits information as to whether or not the bit field for the indicator of the parameter information is configured, to the user terminal, by higher layer signaling.

Abstract translation: 提供了包括多个无线基站和能够与多个无线基站协调多点传输的用户终端的无线通信系统，在该无线通信系统中，无线基站具有生成部， 生成与下行链路信号有关的参数信息;控制信息生成部，生成包含表示特定参数信息的指示符的下行链路控制信息;控制部，其控制是否在所述参数信息的指示符中配置位字段 下行链路控制信息，以及发送部，其通过高层信令向用户终端发送关于参数信息的指示符的比特字段是否被配置的信息。

公开(公告)号：US09386599B2

公开(公告)日：2016-07-05

申请号：US14357579

申请日：2012-11-22

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Xiang Yun ,  Xiaoming She ,  Lan Chen

IPC: H04W72/12 ,  H04B7/02 ,  H04B7/06 ,  H04L5/00 ,  H04W48/20

CPC classification number: H04W72/1247 ,  H04B7/024 ,  H04B7/0632 ,  H04B7/0639 ,  H04L5/0035 ,  H04L5/0075 ,  H04W48/20

Abstract: The present invention is designed to provide a radio communication system, a radio base station apparatus and a radio communication method which can realize high transmission rate while reducing the calculation load involved in CoMP scheduling. The present invention provides a radio communication system including 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 radio base station apparatus has: an operation section (420) that calculates the priority of a pattern to be a candidate for radio resource allocation, which is determined based on candidate cell information that is reported from the user terminal and that shows a candidate of a cell to perform coordinated multiple point transmission; and a scheduling section (421) that executes scheduling based on the priority calculated in the operation section; and the user terminal has: a reporting section that reports the candidate cell information to the radio base station apparatus.

Abstract translation: 本发明旨在提供一种在减少CoMP调度涉及的计算负担的同时实现高传输速率的无线通信系统，无线基站装置和无线通信方法。 本发明提供一种无线通信系统，包括多个无线基站装置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，在该无线通信系统 ：无线基站装置具有：运算部（420），其计算作为无线资源分配候选的模式的优先级，该模式是根据从用户终端报告并显示候选的候选小区信息确定的 执行协调的多点传输; 以及调度部（421），其基于在所述操作部中计算出的优先级来执行调度; 并且用户终端具有：向无线基站装置报告候选小区信息的报告部。

公开(公告)号：US20150110032A1

公开(公告)日：2015-04-23

申请号：US14399054

申请日：2013-04-24

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Kazuaki Takeda ,  Yoshihisa Kishiyama ,  Liu Liu ,  Yu Jiang ,  Xiang Yun ,  Lan Chen

IPC: H04B7/02 ,  H04W72/04

CPC classification number: H04B7/024 ,  H04W16/32 ,  H04W72/042 ,  H04W76/15

Abstract: The present invention is designed to realize signaling of cell index information that is suitable for CoMP transmission/reception techniques. The radio base station apparatus of a special cell generates downlink control information, in which the indices of CoMP sets are incorporated in a physical downlink control channel that is shared between the multiple cells that carry out joint transmission, based on a table in which indices to represent individual coordinated cells that serve as transmission points in CoMP transmission and indices of CoMP sets to represent combinations of multiple cells that carry out joint transmission in CoMP transmission are mapped to bit data.

Abstract translation: 本发明旨在实现适用于CoMP发送/接收技术的小区索引信息的信令。 特殊小区的无线基站装置生成下行链路控制信息，其中CoMP集合的索引被并入在进行联合发送的多个小区之间共享的物理下行链路控制信道中， 表示用作CoMP传输中的传输点的各个协作小区，并且CoMP组的索引表示在CoMP传输中执行联合传输的多个小区的组合被映射到比特数据。

公开(公告)号：US09532367B2

公开(公告)日：2016-12-27

申请号：US14384451

申请日：2013-03-12

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Xiang Yun ,  Yu Jiang ,  Lan Chen

IPC: H04W72/08 ,  H04B7/02 ,  H04B7/06 ,  H04L1/00 ,  H04W72/00 ,  H04L1/16

CPC classification number: H04W72/085 ,  H04B7/024 ,  H04B7/0623 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/0039 ,  H04L1/1607 ,  H04L1/1657 ,  H04W72/005

Abstract: The present invention is designed to prevent the decrease of throughput and also reduce the overhead of CSI feedback when CoMP transmission is applied. A radio base station is configured to be able to perform coordinated multiple-point transmission/reception with a user terminal, and includes a detection section configured to detect a retransmission control signal fed back from the user terminal, and a CQI updating section configured to update a CQI for coordinated multiple-point transmission/reception using received quality information in each cell, and the CQI updating section updates the CQI using a calculating formula that is defined with the received quality information in each cell and a variable which changes the value depending on the content of the retransmission control signal.

Abstract translation: 本发明旨在防止吞吐量的降低，并且还降低了应用CoMP传输时CSI反馈的开销。 无线基站被配置为能够与用户终端进行协调的多点发送/接收，并且包括：检测部，被配置为检测从用户终端反馈的重发控制信号; CQI更新部，被配置为更新 使用每个小区中的接收质量信息进行协调的多点发送/接收的CQI，并且CQI更新部分使用每个小区中接收到的质量信息定义的计算公式来更新CQI，以及根据 重传控制信号的内容。