公开(公告)号：EP2725731B1

公开(公告)日：2018-07-18

申请号：EP12831376.4

申请日：2012-09-18

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO Riichi ,  MURAKAMI Tomoki ,  ISHIHARA Koichi ,  ICHIKAWA Takeo ,  ASAI Yusuke ,  KUMAGAI Tomoaki ,  MIZOGUCHI Masato

IPC分类号： H04J99/00 ,  H04B7/04 ,  H04L25/02 ,  H04B7/06 ,  H04B7/0452 ,  H04B7/0417

CPC分类号： H04B7/0417 ,  H04B7/0452 ,  H04B7/0634 ,  H04L25/0204 ,  H04L25/0226

摘要： The number of training signals for channel estimation is reduced. A wireless communication method includes: a step of reading, by an access point apparatus, stored training weights for a station which performs channel estimation; a step of generating, by the access point apparatus, a weight training symbol by multiplying the training weights by a training symbol and transmitting the generated weight training symbol; a step of estimating, by a station apparatus, weight channel information from the received weight training symbol; a step of transmitting, by the station apparatus, the weight channel information to the access point apparatus; a step of calculating, by the access point apparatus, transmission weights using the received weight channel information and the stored training weights; a step of transmitting, by the access point apparatus, a data signal in accordance with the transmission weights; and a step of calculating and storing, by the access point apparatus, new training weights using the weight channel information and the stored training weights.

公开(公告)号：EP2426977B1

公开(公告)日：2015-06-10

申请号：EP10797186.3

申请日：2010-07-08

申请人： Nippon Telegraph And Telephone Corporation

发明人： MURAKAMI Tomoki ,  ICHIKAWA Takeo ,  KUDO Riichi ,  TAKATORI Yasushi ,  MIZOGUCHI Masato ,  HIRAGURI Takefumi ,  NISHIMORI Kentaro

IPC分类号： H04B7/10 ,  H04B7/02 ,  H04B7/04 ,  H04W72/08 ,  H04B7/06 ,  H04W72/04

CPC分类号： H04W72/0453 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0697 ,  H04B17/318 ,  H04B17/382 ,  H04W72/046 ,  H04W72/082

公开(公告)号：EP2790338A1

公开(公告)日：2014-10-15

申请号：EP13740940.5

申请日：2013-01-23

申请人： Nippon Telegraph and Telephone Corporation

发明人： KUDO Riichi ,  ASAI Yusuke ,  MURAKAMI Tomoki ,  ISHIHARA Koichi ,  MIZOGUCHI Masato

IPC分类号： H04J11/00 ,  H04B7/04 ,  H04J99/00 ,  H04W16/28

CPC分类号： H04L5/0053 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/068 ,  H04B7/0684 ,  H04J11/003 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232 ,  H04W72/0453 ,  H04W88/08

摘要： The number of OFDM symbols for channel estimation is reduced, overhead due to a pilot signal and a feedback signal is reduced, and the throughput is improved. A wireless apparatus is provided with: an iterative coefficient setting unit which sets, for a plurality of transmission ports, an iterative coefficient representing the number of transmission ports which share a plurality of frequency channels of training signals for estimating the channel information; a training signal generating unit which allocates frequency channels to each transmission port so as to satisfy the set iterative coefficient and generates L training signals based on the allocated frequency channels; a channel information acquiring unit which acquires channel information estimated from the training signals from a communication partner for the frequency channels allocated to each transmission port; and a channel information interpolating unit which interpolates channel information of a remaining frequency channel other than the frequency channels allocated to each transmission port from the acquired channel information.

摘要翻译： 用于信道估计的OFDM符号的数量减少，由于导频信号和反馈信号的开销降低，并且提高了吞吐量。 无线装置具有：迭代系数设定单元，对于多个发送端口，设定表示共享用于估计信道信息的训练信号的多个频率信道的发送端口的数量的迭代系数; 训练信号生成单元，其向每个发送端口分配频率信道，以满足所设置的迭代系数，并且基于所分配的频率信道生成L个训练信号; 频道信息获取单元，从分配给每个传输端口的频道的通信对方获取从训练信号估计的频道信息; 以及频道信息内插单元，其从所获取的频道信息中插入除了分配给每个传输端口的频道之外的剩余频道的频道信息。

公开(公告)号：EP2642781A1

公开(公告)日：2013-09-25

申请号：EP11842236.9

申请日：2011-11-15

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO Riichi ,  MATSUI Munehiro ,  MURAKAMI Tomoki ,  ICHIKAWA Takeo ,  ASAI Yusuke ,  ISHIHARA Koichi ,  YAMADA Tomoyuki ,  MIZOGUCHI Masato

IPC分类号： H04W16/28 ,  H04B7/04 ,  H04J11/00 ,  H04J99/00 ,  H04W24/10 ,  H04W28/18

摘要： Communication quality is prevented from being deteriorated due to interference caused by low accuracy of channel information or interference from another base station or another wireless communication system. A wireless communication system includes a first wireless station including a plurality of antenna elements, transmission units corresponding to the plurality of antenna elements, and a transmission directivity control unit that controls transmission directivity of the plurality of antenna elements, and a plurality of second wireless stations each including a reception power measurement unit that measures a reception power. The transmission directivity control unit determines the transmission directivity of each of the plurality of antenna elements so that a signal does not reach a particular second wireless station among the plurality of second wireless stations. The transmission units generate wireless signals using the transmission directivity. The plurality of antenna elements transmit the generated wireless signals. The reception power measurement unit measures the reception power in a period that is set so that a signal does not reach the particular second wireless station, and detect the presence or absence of interference.

摘要翻译： 防止由于信道信息的低精度或来自另一基站或另一无线通信系统的干扰而引起的干扰而导致通信质量恶化。 无线通信系统包括：第一无线站，包括多个天线元件，对应于多个天线元件的发送单元;以及控制多个天线元件的发送方向性的发送方向性控制单元，以及多个第二无线站 每个包括测量接收功率的接收功率测量单元。 发送方向性控制单元确定多个天线元件中的每一个的发送方向性，使得在多个第二无线站中信号没有到达特定的第二无线站。 传输单元使用传输方向性产生无线信号。 多个天线元件发送生成的无线信号。 接收功率测量单元在被设置为使得信号不到达特定的第二无线站的时间段内测量接收功率，并且检测是否存在干扰。

公开(公告)号：EP2642781B1

公开(公告)日：2019-10-30

申请号：EP11842236.9

申请日：2011-11-15

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO Riichi ,  MATSUI Munehiro ,  MURAKAMI Tomoki ,  ICHIKAWA Takeo ,  ASAI Yusuke ,  ISHIHARA Koichi ,  YAMADA Tomoyuki ,  MIZOGUCHI Masato

IPC分类号： H04B7/0452 ,  H04B7/06 ,  H04L5/00 ,  H04W16/28 ,  H04W24/10 ,  H04B17/318

公开(公告)号：EP2930864B1

公开(公告)日：2017-08-16

申请号：EP14740258.0

申请日：2014-01-15

申请人： Nippon Telegraph and Telephone Corporation

发明人： ISHIHARA Koichi ,  MIZOGUCHI Masato ,  MURAKAMI Tomoki ,  KATAOKA Tomoyoshi ,  KISAKA Yoshiaki ,  NAKAGAWA Tadao ,  YAMAZAKI Etsushi ,  OKAMOTO Seiji ,  HORIKOSHI Kengo ,  TOMIZAWA Masahito ,  KUDO Riichi

IPC分类号： H04B10/61 ,  H04B10/2513 ,  H04J3/14 ,  H04B10/69

CPC分类号： H04J14/08 ,  H04B10/0775 ,  H04B10/2513 ,  H04B10/25133 ,  H04B10/516 ,  H04B10/61 ,  H04B10/6161 ,  H04B10/697 ,  H04B2210/072 ,  H04J3/14

公开(公告)号：EP2725731A1

公开(公告)日：2014-04-30

申请号：EP12831376.4

申请日：2012-09-18

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO Riichi ,  MURAKAMI Tomoki ,  ISHIHARA Koichi ,  ICHIKAWA Takeo ,  ASAI Yusuke ,  KUMAGAI Tomoaki ,  MIZOGUCHI Masato

IPC分类号： H04J99/00 ,  H04B7/04

CPC分类号： H04B7/0417 ,  H04B7/0452 ,  H04B7/0634 ,  H04L25/0204 ,  H04L25/0226

摘要： The number of training signals for channel estimation is reduced. A wireless communication method includes: a step of reading, by an access point apparatus, stored training weights for a station which performs channel estimation; a step of generating, by the access point apparatus, a weight training symbol by multiplying the training weights by a training symbol and transmitting the generated weight training symbol; a step of estimating, by a station apparatus, weight channel information from the received weight training symbol; a step of transmitting, by the station apparatus, the weight channel information to the access point apparatus; a step of calculating, by the access point apparatus, transmission weights using the received weight channel information and the stored training weights; a step of transmitting, by the access point apparatus, a data signal in accordance with the transmission weights; and a step of calculating and storing, by the access point apparatus, new training weights using the weight channel information and the stored training weights.

摘要翻译： 用于信道估计的训练信号的数量减少。 无线通信方法包括：由接入点装置读取进行信道估计的站的存储训练权重的步骤; 由接入点设备通过将训练权重乘以训练符号并发送生成的权重训练符号来生成加权训练符号; 通过站装置估计来自所接收的权重训练符号的权重信道信息的步骤; 由所述站装置向所述接入点装置发送权重信道信息的步骤; 由接入点装置使用所接收的加权信道信息和存储的训练权重来计算发送权重的步骤; 由接入点装置根据发送权重发送数据信号的步骤; 以及由接入点装置使用权重信道信息和存储的训练权重来计算和存储新的训练权重的步骤。

公开(公告)号：EP2547155B1

公开(公告)日：2019-05-22

申请号：EP11753437.0

申请日：2011-03-10

申请人： Nippon Telegraph And Telephone Corporation

发明人： MURAKAMI Tomoki ,  KUDO Riichi ,  ICHIKAWA Takeo ,  TAKATORI Yasushi ,  MATSUI Munehiro ,  ASAI Yusuke ,  MIZOGUCHI Masato

IPC分类号： H04B7/0452 ,  H04B5/00 ,  H04W52/24 ,  H04W72/04 ,  H04W72/08 ,  H04L5/00 ,  H04B17/345

公开(公告)号：EP2988443A1

公开(公告)日：2016-02-24

申请号：EP14801450.9

申请日：2014-05-23

申请人： Nippon Telegraph and Telephone Corporation

发明人： FUKUZONO Hayato ,  MURAKAMI Tomoki ,  KUDO Riichi ,  SHINOHARA Shoko ,  TAKATORI Yasushi ,  MIZOGUCHI Masato

IPC分类号： H04J99/00 ,  H04J11/00 ,  H04W16/28

CPC分类号： H04W72/046 ,  H04B7/0617 ,  H04B17/11 ,  H04B17/318 ,  H04L5/0098 ,  H04W16/28 ,  H04W72/0453

摘要： A wireless communication apparatus includes a designation unit which generates format designation information for designating a format of transmission and reception for another wireless communication apparatus, a first transmission unit which wirelessly transmits the format designation information to the other wireless communication apparatus, an acquisition unit which acquires a packet, a propagation channel estimation unit which estimates uplink propagation channel information indicating a propagation channel from the other wireless communication apparatus to the wireless communication apparatus based on the packet, a calibration coefficient calculation unit which calculates a calibration coefficient based on downlink propagation channel information indicating a propagation channel from the wireless communication apparatus to the other wireless communication apparatus and the uplink propagation channel information, a transmission weight value calculation unit which calculates a transmission weight value based on the calibration coefficient and the uplink propagation channel information, and a second transmission unit which wirelessly transmits a predetermined signal to the other wireless communication apparatus based on the transmission weight value.

摘要翻译： 无线通信设备包括：指定单元，其生成用于指定另一无线通信设备的发送和接收的格式的格式指定信息;第一发送单元，其将该格式指定信息无线地发送到其他无线通信设备;获取单元，其获取 分组;传播路径估计单元，基于分组来估计指示从其他无线通信设备到无线通信设备的传播信道的上行传播信道信息;校准系数计算单元，基于下行传播信道信息来计算校准系数 指示从所述无线通信设备到所述另一无线通信设备的传播信道和所述上行链路传播信道信息;传输权重值计算单元， 基于所述校准系数和所述上行链路传播信道信息的任务权重值;以及第二发送单元，基于所述发送权重值，将预定信号无线发送到所述另一无线通信装置。

公开(公告)号：EP2800416A1

公开(公告)日：2014-11-05

申请号：EP13746689.2

申请日：2013-02-04

申请人： Nippon Telegraph and Telephone Corporation

发明人： MURAKAMI Tomoki ,  ASAI Yusuke ,  KUDO Riichi ,  ISHIHARA Koichi ,  MIZOGUCHI Masato ,  ICHIKAWA Takeo

IPC分类号： H04W28/16 ,  H04B7/06 ,  H04B7/10 ,  H04J11/00 ,  H04J99/00 ,  H04W16/28

CPC分类号： H04B7/0452 ,  H04B7/024 ,  H04B7/0456 ,  H04B7/0617 ,  H04J11/0053 ,  H04L5/0035 ,  H04L5/005 ,  H04L27/2613 ,  H04L27/2626 ,  H04W28/16 ,  H04W88/08

摘要： Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.

摘要翻译： 避免了使用干扰抑制技术的协作传输中的前导码信号和导频信号的干扰。 一种用于向包括至少一个无线装置的无线系统中的站发送方向性控制的无线信号进行发送的无线装置，具有产生要添加到无线信号的已知信号的已知信号生成部， 处理单元，其对由已知信号生成单元生成的已知信号进行加权，以及无线处理单元，其发送由加权处理单元执行了加权的已知信号。