公开(公告)号：US09444527B2

公开(公告)日：2016-09-13

申请号：US14356171

申请日：2012-11-01

Applicant: NTT DOCOMO, INC.

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

IPC: G01R31/08 ,  H04B7/02 ,  H04L1/00 ,  H04L5/00 ,  H04B7/06 ,  H04W24/10 ,  H04W72/08

CPC classification number: H04B7/024 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/065 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/003 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0073 ,  H04W24/10 ,  H04W72/085

Abstract: To reduce overhead of CSI feedback without decreasing throughput in applying CoMP transmission, a radio communication method of the invention is characterized by including, in a user terminal measuring quality information for each of cells to perform Coordinated Multi-Point transmission, and notifying a radio base station apparatus of the quality information, in the radio base station apparatus calculating a quality difference between the cells to perform Coordinated Multi-Point transmission, by using the quality information for each the cells from the user terminal, determining granularity of inter-cell channel state information for each of the cells based on the quality difference, and notifying the user terminal of the granularity, and, in that the user terminal generating inter-cell channel state information for each of the cells according to the granularity from the radio base station apparatus, and transmitting the inter-cell channel state information for each of the cells to radio base station apparatuses of cells to perform Coordinated Multi-Point transmission.

Abstract translation: 为了减少CSI反馈的开销而不降低应用CoMP传输的吞吐量，本发明的无线电通信方法的特征在于在用户终端中包括测量每个小区的质量信息以执行协调多点传输，并通知无线电基站 在无线基站装置中，通过使用来自用户终端的各小区的质量信息，确定小区间信道状态的粒度，计算出小区之间的质量差进行协调多点发送 基于质量差的每个小区的信息，并且向用户终端通知粒度，并且用户终端根据来自无线基站装置的粒度来生成每个小区的小区间信道状态信息 ，并且将每个小区的小区间信道状态信息发送到rad io基站装置执行协调多点传输。

公开(公告)号：US09337907B2

公开(公告)日：2016-05-10

申请号：US14356289

申请日：2012-11-01

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Yoshihisa Kishiyama ,  Kazuaki Takeda ,  Xiaoming She

IPC: H04W4/00 ,  H04B7/02 ,  H04L25/02 ,  H04L5/00

CPC classification number: H04B7/024 ,  H04L5/0051 ,  H04L25/0202 ,  H04L25/0224 ,  H04L25/0226 ,  H04W76/15

Abstract: To enable a user terminal to determine a cell of a downlink signal also in a heterogeneous environment using the same cell identification information, and thereby enable reception accuracy to be maintained, a radio communication method of the invention is characterized in that a radio base station apparatus generates a reference signal sequence by using a pseudo random sequence including user specific information, and transmits the reference signal sequence to a user terminal, and that the user terminal performs signal processing using the reference signal sequence transmitted from the radio base station apparatus.

Abstract translation: 为了使用户终端能够使用相同的小区识别信息在异构环境中确定下行链路信号的小区，从而能够保持接收精度，本发明的无线通信方法的特征在于，无线基站装置 通过使用包括用户特定信息的伪随机序列来生成参考信号序列，并将参考信号序列发送给用户终端，并且用户终端使用从无线基站装置发送的参考信号序列进行信号处理。

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：US20140307630A1

公开(公告)日：2014-10-16

申请号：US14356289

申请日：2012-11-01

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Yoshihisa Kishiyama ,  Kazuaki Takeda ,  Xiaoming She

IPC: H04B7/02 ,  H04L25/02

CPC classification number: H04B7/024 ,  H04L5/0051 ,  H04L25/0202 ,  H04L25/0224 ,  H04L25/0226 ,  H04W76/15

Abstract: To enable a user terminal to determine a cell of a downlink signal also in a heterogeneous environment using the same cell identification information, and thereby enable reception accuracy to be maintained, a radio communication method of the invention is characterized in that a radio base station apparatus generates a reference signal sequence by using a pseudo random sequence including user specific information, and transmits the reference signal sequence to a user terminal, and that the user terminal performs signal processing using the reference signal sequence transmitted from the radio base station apparatus.

Abstract translation: 为了使用户终端能够使用相同的小区识别信息在异构环境中确定下行链路信号的小区，从而能够保持接收精度，本发明的无线通信方法的特征在于，无线基站装置 通过使用包括用户特定信息的伪随机序列来生成参考信号序列，并将参考信号序列发送给用户终端，并且用户终端使用从无线基站装置发送的参考信号序列进行信号处理。

公开(公告)号：US09312984B2

公开(公告)日：2016-04-12

申请号：US14356174

申请日：2012-11-01

Applicant: NTT DOCOMO, INC.

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

IPC: H04L1/00 ,  H04W4/00 ,  H04L5/00 ,  H04B7/02 ,  H04B7/06 ,  H04L1/16

CPC classification number: H04L1/0026 ,  H04B7/024 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04L1/0028 ,  H04L1/1671 ,  H04L5/0035 ,  H04L5/0057 ,  H04W76/15

Abstract: To reduce overhead of CSI feedback without decreasing throughput in applying CoMP transmission, a radio communication method of the invention is characterized in that a radio base station apparatus determines so that content of CSI to transmit to a serving cell to perform CoMP transmission as feedback is different from content of CSI to transmit to a coordinated cell as feedback, and notifies a user terminal of the content of CSI, and that the user terminal generates feedback information based on the content of CSI notified from the radio base station apparatus, and transmits the feedback information to radio base station apparatuses of cells that perform Coordinated Multi-Point transmission.

Abstract translation: 为了在不降低应用CoMP传输的吞吐量的情况下减少CSI反馈的开销，本发明的无线电通信方法的特征在于，无线电基站装置确定使得向服务小区发送的作为反馈的CoMP传输的CSI的内容不同 从CSI的内容发送到协作小区作为反馈，并且向用户终端通知CSI的内容，并且用户终端基于从无线基站装置通知的CSI的内容生成反馈信息，并且发送反馈 信息给执行协调多点传输的小区的无线基站装置。

公开(公告)号：US09306650B2

公开(公告)日：2016-04-05

申请号：US14375573

申请日：2013-01-24

Applicant: NTT DOCOMO, INC.

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

IPC: H04B7/00 ,  H04B7/06 ,  H04W24/08 ,  H04L5/00 ,  H04B7/02

CPC classification number: H04B7/0626 ,  H04B7/024 ,  H04L5/0035 ,  H04L5/0057 ,  H04L5/0073 ,  H04W24/08

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. In a radio communication system including a plurality of radio base station apparatuses and a user terminal that is configured to be able to carry out coordinated multiple-point transmission/reception with the plurality of radio base station apparatuses, the radio base station apparatus designates a plurality of candidate values of predetermined inter-cell channel state information and reports them to the user terminal, and the user terminal measures inter-cell channel state information of each cell, and also selects a specific candidate value that is close to the measurement value of inter-cell channel state information from the plurality of candidate values that have been reported, and feeds back the specific candidate value to the radio base station apparatus.

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。 在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/接收的用户终端的无线通信系统中，无线基站装置指定多个 的预定小区间信道状态信息的候选值，并将其报告给用户终端，用户终端测定各小区的小区间信道状态信息，并且还选择接近inter的小区间信道状态信息的测量值的特定候选值 - 来自已经报告的多个候选值的单元信道状态信息，并将特定候选值反馈给无线基站装置。

公开(公告)号：US20150018034A1

公开(公告)日：2015-01-15

申请号：US14375573

申请日：2013-01-24

Applicant: NTT DOCOMO, INC.

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

IPC: H04B7/06 ,  H04W24/08

CPC classification number: H04B7/0626 ,  H04B7/024 ,  H04L5/0035 ,  H04L5/0057 ,  H04L5/0073 ,  H04W24/08

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. In a radio communication system including a plurality of radio base station apparatuses and a user terminal that is configured to be able to carry out coordinated multiple-point transmission/reception with the plurality of radio base station apparatuses, the radio base station apparatus designates a plurality of candidate values of predetermined inter-cell channel state information and reports them to the user terminal, and the user terminal measures inter-cell channel state information of each cell, and also selects a specific candidate value that is close to the measurement value of inter-cell channel state information from the plurality of candidate values that have been reported, and feeds back the specific candidate value to the radio base station apparatus.

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。 在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/接收的用户终端的无线通信系统中，无线基站装置指定多个 的预定小区间信道状态信息的候选值，并将其报告给用户终端，用户终端测定各小区的小区间信道状态信息，并且还选择接近inter的小区间信道状态信息的测量值的特定候选值 - 来自已经报告的多个候选值的单元信道状态信息，并将特定候选值反馈给无线基站装置。

公开(公告)号：US20140286290A1

公开(公告)日：2014-09-25

申请号：US14356174

申请日：2012-11-01

Applicant: NTT DOCOMO, INC.

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

IPC: H04L1/00 ,  H04L5/00

CPC classification number: H04L1/0026 ,  H04B7/024 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04L1/0028 ,  H04L1/1671 ,  H04L5/0035 ,  H04L5/0057 ,  H04W76/15

Abstract: To reduce overhead of CSI feedback without decreasing throughput in applying CoMP transmission, a radio communication method of the invention is characterized in that a radio base station apparatus determines so that content of CSI to transmit to a serving cell to perform CoMP transmission as feedback is different from content of CSI to transmit to a coordinated cell as feedback, and notifies a user terminal of the content of CSI, and that the user terminal generates feedback information based on the content of CSI notified from the radio base station apparatus, and transmits the feedback information to radio base station apparatuses of cells that perform Coordinated Multi-Point transmission.

Abstract translation: 为了在不降低应用CoMP传输的吞吐量的情况下减少CSI反馈的开销，本发明的无线电通信方法的特征在于，无线电基站装置确定使得向服务小区发送的作为反馈的CoMP传输的CSI的内容不同 从CSI的内容发送到协作小区作为反馈，并且向用户终端通知CSI的内容，并且用户终端基于从无线基站装置通知的CSI的内容生成反馈信息，并且发送反馈 信息给执行协调多点传输的小区的无线基站装置。

公开(公告)号：US20140286289A1

公开(公告)日：2014-09-25

申请号：US14356171

申请日：2012-11-01

Applicant: NTT DOCOMO, INC.

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

IPC: H04B7/02 ,  H04W72/08 ,  H04B7/06 ,  H04W24/10

CPC classification number: H04B7/024 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/065 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/003 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0073 ,  H04W24/10 ,  H04W72/085

Abstract: To reduce overhead of CSI feedback without decreasing throughput in applying CoMP transmission, a radio communication method of the invention is characterized by including, in a user terminal measuring quality information for each of cells to perform Coordinated Multi-Point transmission, and notifying a radio base station apparatus of the quality information, in the radio base station apparatus calculating a quality difference between the cells to perform Coordinated Multi-Point transmission, by using the quality information for each the cells from the user terminal, determining granularity of inter-cell channel state information for each of the cells based on the quality difference, and notifying the user terminal of the granularity, and, in that the user terminal generating inter-cell channel state information for each of the cells according to the granularity from the radio base station apparatus, and transmitting the inter-cell channel state information for each of the cells to radio base station apparatuses of cells to perform Coordinated Multi-Point transmission.

Abstract translation: 为了减少CSI反馈的开销而不降低应用CoMP传输的吞吐量，本发明的无线电通信方法的特征在于在用户终端中包括测量每个小区的质量信息以执行协调多点传输，并通知无线电基站 在无线基站装置中，通过使用来自用户终端的各小区的质量信息，确定小区间信道状态的粒度，计算出小区之间的质量差进行协调多点发送 基于质量差的每个小区的信息，并且向用户终端通知粒度，并且用户终端根据来自无线基站装置的粒度来生成每个小区的小区间信道状态信息 ，并且将每个小区的小区间信道状态信息发送到rad io基站装置执行协调多点传输。

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。