公开(公告)号：US20130039205A1

公开(公告)日：2013-02-14

申请号：US13583340

申请日：2011-03-10

申请人： Tomoki Murakami ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasushi Takatori ,  Munehiro Matsui ,  Yusuke Asai ,  Masato Mizoguchi

发明人： Tomoki Murakami ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasushi Takatori ,  Munehiro Matsui ,  Yusuke Asai ,  Masato Mizoguchi

IPC分类号： H04W52/24

CPC分类号： H04W72/082 ,  H04B5/00 ,  H04B7/0452 ,  H04B17/345 ,  H04L5/0055 ,  H04W52/243 ,  H04W72/0453

摘要： Provided are a wireless communication method, a base station, a wireless communication system and a communication apparatus whereby an interference power is calculated from an estimated propagation channel estimation result and the transmission power is controlled based on the interference power or the interference is suppressed by controlling the directivity, thereby increasing the transmission capacity. A propagation channel estimation circuit performs propagation channel estimation from a response signal transmitted from a terminal station and estimates a propagation channel estimation result. An interference power calculation circuit measures each interference power from a signal of each sub-carrier received by each of wireless units, and calculates an interference power for each sub-carrier from the propagation channel estimation result estimated by the propagation channel estimation circuit. When the calculated interference power is equal to or more than a predetermined threshold, an interference suppression signal generation circuit changes the transmission power and generates an interference suppression signal.

公开(公告)号：US08897163B2

公开(公告)日：2014-11-25

申请号：US13583340

申请日：2011-03-10

申请人： Tomoki Murakami ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasushi Takatori ,  Munehiro Matsui ,  Yusuke Asai ,  Masato Mizoguchi

发明人： Tomoki Murakami ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasushi Takatori ,  Munehiro Matsui ,  Yusuke Asai ,  Masato Mizoguchi

IPC分类号： G01R31/08 ,  H04B5/00 ,  H04B7/04 ,  H04W72/08 ,  H04B17/00 ,  H04W52/24 ,  H04W72/04

CPC分类号： H04W72/082 ,  H04B5/00 ,  H04B7/0452 ,  H04B17/345 ,  H04L5/0055 ,  H04W52/243 ,  H04W72/0453

摘要： Provided are a wireless communication method, a base station, a wireless communication system and a communication apparatus whereby an interference power is calculated from an estimated propagation channel estimation result and the transmission power is controlled based on the interference power or the interference is suppressed by controlling the directivity, thereby increasing the transmission capacity. A propagation channel estimation circuit performs propagation channel estimation from a response signal transmitted from a terminal station and estimates a propagation channel estimation result. An interference power calculation circuit measures each interference power from a signal of each sub-carrier received by each of wireless units, and calculates an interference power for each sub-carrier from the propagation channel estimation result estimated by the propagation channel estimation circuit. When the calculated interference power is equal to or more than a predetermined threshold, an interference suppression signal generation circuit changes the transmission power and generates an interference suppression signal.

摘要翻译： 提供了一种无线通信方法，基站，无线通信系统和通信装置，由此根据估计的传播路径估计结果计算干扰功率，并且基于干扰功率来控制发送功率，或者通过控制来抑制干扰 方向性，从而增加传输能力。 传播路径估计电路根据从终端发送的响应信号进行传播路径估计，并估计传播路径估计结果。 干扰功率计算电路根据由每个无线单元接收的每个子载波的信号来测量每个干扰功率，并且根据由传播信道估计电路估计的传播路径估计结果来计算每个副载波的干扰功率。 当所计算的干扰功率等于或大于预定阈值时，干扰抑制信号产生电路改变发射功率并产生干扰抑制信号。

公开(公告)号：US09276652B2

公开(公告)日：2016-03-01

申请号：US13881525

申请日：2011-11-15

申请人： Riichi Kudo ,  Munehiro Matsui ,  Tomoki Murakami ,  Takeo Ichikawa ,  Yusuke Asai ,  Koichi Ishihara ,  Tomoyuki Yamada ,  Masato Mizoguchi

发明人： Riichi Kudo ,  Munehiro Matsui ,  Tomoki Murakami ,  Takeo Ichikawa ,  Yusuke Asai ,  Koichi Ishihara ,  Tomoyuki Yamada ,  Masato Mizoguchi

IPC分类号： H04B7/04 ,  H04L5/00 ,  H04B7/06 ,  H04W16/28 ,  H04W24/10 ,  H04B17/318

CPC分类号： H04B7/0452 ,  H04B7/0617 ,  H04B7/0632 ,  H04B17/318 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0057 ,  H04W16/28 ,  H04W24/10

摘要： A wireless communication system includes a first wireless station including antenna elements, transmission units corresponding to the antenna elements, and a transmission directivity control unit that controls transmission directivity of the antenna elements, and 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 antenna elements so that a signal does not reach a particular second wireless station among the second wireless stations. The transmission units generate wireless signals using the transmission directivity. The 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 by using the directivity, and detect the presence or absence of interference caused by the low accuracy of channel information.

摘要翻译： 无线通信系统包括：第一无线站，包括天线元件，与天线元件对应的发送单元，以及控制天线元件的发送方向性的发送方向性控制单元，以及各自包含测量 接收功率 发送方向性控制单元确定每个天线元件的发送方向性，使得信号在第二无线站中不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。 天线元件发送生成的无线信号。 接收功率测量单元在设定为使得信号通过使用方向性不到达特定的第二无线站的时间段中测量接收功率，并且检测由信道信息的低精度引起的干扰的存在或不存在。

公开(公告)号：US20130208619A1

公开(公告)日：2013-08-15

申请号：US13881525

申请日：2011-11-15

申请人： Riichi Kudo ,  Munehiro Matsui ,  Tomoki Murakami ,  Takeo Ichikawa ,  Yusuke Asai ,  Koichi Ishihara ,  Tomoyuki Yamada ,  Masato Mizoguchi

发明人： Riichi Kudo ,  Munehiro Matsui ,  Tomoki Murakami ,  Takeo Ichikawa ,  Yusuke Asai ,  Koichi Ishihara ,  Tomoyuki Yamada ,  Masato Mizoguchi

IPC分类号： H04B7/04

CPC分类号： H04B7/0452 ,  H04B7/0617 ,  H04B7/0632 ,  H04B17/318 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0057 ,  H04W16/28 ,  H04W24/10

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：包括多个天线元件的第一无线站，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。 传输方向性控制单元确定多个天线元件中的每一个的传输方向性，使得信号在多个第二无线站中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：US08891555B2

公开(公告)日：2014-11-18

申请号：US13579220

申请日：2011-02-24

申请人： Koichi Ishihara ,  Yasushi Takatori ,  Yusuke Asai ,  Riichi Kudo ,  Wenjie Jiang ,  Tomoyuki Yamada ,  Masato Mizoguchi

发明人： Koichi Ishihara ,  Yasushi Takatori ,  Yusuke Asai ,  Riichi Kudo ,  Wenjie Jiang ,  Tomoyuki Yamada ,  Masato Mizoguchi

IPC分类号： H04J3/24 ,  H04B7/06 ,  H04B7/08 ,  H04B7/04 ,  H04B7/10

CPC分类号： H04B7/0691 ,  H04B7/0452 ,  H04B7/0834 ,  H04B7/0874 ,  H04B7/0877 ,  H04B7/10

摘要： A spatial multiplexing wireless transmission system is formed by a base station, and by a plurality of terminal stations that are provided with a plurality of antennas. The base station is provided with an information signal generating portion, a control signal generating portion, a transmission frame generating portion, a multiple beamforming portion, a transmission/reception switching portion, a reception signal processing portion, a propagation environment estimating portion, and an antenna information generating portion. At least one of the terminal stations is provided with a transmission/reception switching portion, a reception signal processing portion, a decoding portion, an antenna information extracting portion, an antenna information generating portion, an transmitting portion, a battery, a remaining battery detecting portion, a transmission request extracting portion, and a propagation environment estimating portion.

摘要翻译： 空间复用无线传输系统由基站和多个设置有多个天线的终端站形成。 基站设置有信息信号生成部，控制信号生成部，发送帧生成部，多波束形成部，发送接收切换部，接收信号处理部，传播环境估计部以及 天线信息生成部。 至少一个终端站设置有发送/接收转换部分，接收信号处理部分，解码部分，天线信息提取部分，天线信息产生部分，发送部分，电池，剩余电池检测 传输请求提取部分和传播环境估计部分。

公开(公告)号：US20120307739A1

公开(公告)日：2012-12-06

申请号：US13579220

申请日：2011-02-24

申请人： Koichi Ishihara ,  Yasushi Takatori ,  Yusuke Asai ,  Riichi Kudo ,  Wenjie Jiang ,  Tomoyuki Yamada ,  Masato Mizoguchi

发明人： Koichi Ishihara ,  Yasushi Takatori ,  Yusuke Asai ,  Riichi Kudo ,  Wenjie Jiang ,  Tomoyuki Yamada ,  Masato Mizoguchi

IPC分类号： H04W4/00

CPC分类号： H04B7/0691 ,  H04B7/0452 ,  H04B7/0834 ,  H04B7/0874 ,  H04B7/0877 ,  H04B7/10

摘要： A spatial multiplexing wireless transmission system is formed by a base station, and by a plurality of terminal stations that are provided with a plurality of antennas. The base station is provided with an information signal generating portion, a control signal generating portion, a transmission frame generating portion, a multiple beamforming portion, a transmission/reception switching portion, a reception signal processing portion, a propagation environment estimating portion, and an antenna information generating portion. At least one of the terminal stations is provided with a transmission/reception switching portion, a reception signal processing portion, a decoding portion, an antenna information extracting portion, an antenna information generating portion, an transmitting portion, a battery, a remaining battery detecting portion, a transmission request extracting portion, and a propagation environment estimating portion.

摘要翻译： 空间复用无线传输系统由基站和多个设置有多个天线的终端站形成。 基站设置有信息信号生成部，控制信号生成部，发送帧生成部，多波束形成部，发送接收切换部，接收信号处理部，传播环境估计部以及 天线信息生成部。 至少一个终端站设置有发送/接收转换部分，接收信号处理部分，解码部分，天线信息提取部分，天线信息产生部分，发送部分，电池，剩余电池检测 传输请求提取部分和传播环境估计部分。

公开(公告)号：US20120099460A1

公开(公告)日：2012-04-26

申请号：US13375065

申请日：2010-07-08

申请人： Tomoki Murakami ,  Takeo Ichikawa ,  Riichi Kudo ,  Yasushi Takatori ,  Masato Mizoguchi ,  Takefumi Hiraguri ,  Kentaro Nishimori

发明人： Tomoki Murakami ,  Takeo Ichikawa ,  Riichi Kudo ,  Yasushi Takatori ,  Masato Mizoguchi ,  Takefumi Hiraguri ,  Kentaro Nishimori

IPC分类号： H04W24/00

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

摘要： This radio communication method is used to perform spatial multiplexing communication between cells in the overlap cell environment. In the MU-MIMO overlap cell environment, when a null is formed between a radio base station and a radio terminal station belonging to different cells, a first set of a “call signal” and a “response signal” is used to perform mutual detection with the radio base station and the radio terminal station belonging to different cells, and then a null is formed so as not to cause interference of radio waves between the radio base station and the radio terminal station belonging to different cells. At this time, the addresses of the radio base station and the radio terminal station are used to discriminate whether the radio base station and the radio terminal station belong to the same cell or different cells.

摘要翻译： 该无线通信方法用于在重叠小区环境中进行小区间的空间复用通信。 在MU-MIMO重叠小区环境中，当在无线基站和属于不同小区的无线终端站之间形成空值时，使用第一组“呼叫信号”和“响应信号”进行相互检测 无线电基站和无线电终端站属于不同的小区，然后形成一个零点，以免引起无线电基站和属于不同小区的无线电终端站之间的无线电波的干扰。 此时，无线基站和无线终端站的地址用于区分无线基站和无线终端站是否属于同一小区或不同的小区。

公开(公告)号：US08830965B2

公开(公告)日：2014-09-09

申请号：US13375065

申请日：2010-07-08

申请人： Tomoki Murakami ,  Takeo Ichikawa ,  Riichi Kudo ,  Yasushi Takatori ,  Masato Mizoguchi ,  Takefumi Hiraguri ,  Kentaro Nishimori

发明人： Tomoki Murakami ,  Takeo Ichikawa ,  Riichi Kudo ,  Yasushi Takatori ,  Masato Mizoguchi ,  Takefumi Hiraguri ,  Kentaro Nishimori

IPC分类号： H04W4/00

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

摘要： This radio communication method is used to perform spatial multiplexing communication between cells in the overlap cell environment. In the MU-MIMO overlap cell environment, when a null is formed between a radio base station and a radio terminal station belonging to different cells, a first set of a “call signal” and a “response signal” is used to perform mutual detection with the radio base station and the radio terminal station belonging to different cells, and then a null is formed so as not to cause interference of radio waves between the radio base station and the radio terminal station belonging to different cells. At this time, the addresses of the radio base station and the radio terminal station are used to discriminate whether the radio base station and the radio terminal station belong to the same cell or different cells.

摘要翻译： 该无线通信方法用于在重叠小区环境中进行小区间的空间复用通信。 在MU-MIMO重叠小区环境中，当在无线基站和属于不同小区的无线终端站之间形成空值时，使用第一组“呼叫信号”和“响应信号”进行相互检测 无线电基站和无线电终端站属于不同的小区，然后形成一个零点，以免引起无线电基站和属于不同小区的无线电终端站之间的无线电波的干扰。 此时，无线基站和无线终端站的地址用于区分无线基站和无线终端站是否属于同一小区或不同的小区。

公开(公告)号：US09253762B2

公开(公告)日：2016-02-02

申请号：US14113319

申请日：2012-04-25

申请人： Yusuke Asai ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasuhiko Inoue ,  Hirantha Sithira Abeysekera ,  Masato Mizoguchi

发明人： Yusuke Asai ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasuhiko Inoue ,  Hirantha Sithira Abeysekera ,  Masato Mizoguchi

IPC分类号： H04W72/04 ,  H04W24/02 ,  H04L29/12 ,  H04W8/18 ,  H04L1/00 ,  H04L12/18 ,  H04W52/00 ,  H04W76/00 ,  H04B7/04 ,  H04W88/08 ,  H04W76/02

CPC分类号： H04W72/04 ,  H04B7/0452 ,  H04L1/00 ,  H04L12/18 ,  H04L12/185 ,  H04L61/2046 ,  H04L61/2069 ,  H04W8/186 ,  H04W24/02 ,  H04W52/00 ,  H04W76/11 ,  H04W76/40 ,  H04W88/08

摘要： In a system which performs wireless communication from an access point to stations using group identification information, the frequency of uses of group identification information that overlaps with that of another access point is reduced. An association between a station apparatus included in a group that is a target for simultaneous transmission and group identification information is stored, each station apparatus included in the group is notified of the group identification information, group identification information that is being used in the other access point apparatus is acquired, and if group identification information that is being used by the access point apparatus itself overlaps with the group identification information used by the other access point apparatus, the group identification information is changed so as to reduce the number of pieces of overlapping group identification information.

摘要翻译： 在使用组识别信息执行从接入点到站的无线通信的系统中，减少与另一个接入点重叠的组识别信息的使用频率。 存储包括在作为用于同时发送的目标的组中的站装置与组标识信息之间的关联，向组中包括的每个站装置通知组标识信息，正在其他访问中使用的组标识信息 并且如果由接入点设备本身正在使用的组识别信息与由另一个接入点设备使用的组识别信息重叠，则组识别信息被改变以便减少重叠的数量 组识别信息。

公开(公告)号：US20140050178A1

公开(公告)日：2014-02-20

申请号：US14113319

申请日：2012-04-26

申请人： Yusuke Asai ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasuhiko Inoue ,  Hirantha Sithira Abeysekera ,  Masato Mizoguchi

发明人： Yusuke Asai ,  Riichi Kudo ,  Takeo Ichikawa ,  Yasuhiko Inoue ,  Hirantha Sithira Abeysekera ,  Masato Mizoguchi

IPC分类号： H04W72/04

CPC分类号： H04W72/04 ,  H04B7/0452 ,  H04L1/00 ,  H04L12/18 ,  H04L12/185 ,  H04L61/2046 ,  H04L61/2069 ,  H04W8/186 ,  H04W24/02 ,  H04W52/00 ,  H04W76/11 ,  H04W76/40 ,  H04W88/08

摘要： In a system which performs wireless communication from an access point to stations using group identification information, the frequency of uses of group identification information that overlaps with that of another access point is reduced. An association between a station apparatus included in a group that is a target for simultaneous transmission and group identification information is stored, each station apparatus included in the group is notified of the group identification information, group identification information that is being used in the other access point apparatus is acquired, and if group identification information that is being used by the access point apparatus itself overlaps with the group identification information used by the other access point apparatus, the group identification information is changed so as to reduce the number of pieces of overlapping group identification information.

摘要翻译： 在使用组识别信息执行从接入点到站的无线通信的系统中，减少与另一个接入点重叠的组识别信息的使用频率。 存储包括在作为用于同时发送的目标的组中的站装置与组标识信息之间的关联，向组中包括的每个站装置通知组标识信息，正在其他访问中使用的组标识信息 并且如果由接入点设备本身正在使用的组识别信息与由另一个接入点设备使用的组识别信息重叠，则组识别信息被改变以便减少重叠的数量 组识别信息。