公开(公告)号：US09319301B2

公开(公告)日：2016-04-19

申请号：US13237017

申请日：2011-09-20

申请人： Cheng Li ,  Jun Tian ,  Chao Lv ,  Hao Wang ,  Yuuta Nakaya

发明人： Cheng Li ,  Jun Tian ,  Chao Lv ,  Hao Wang ,  Yuuta Nakaya

IPC分类号： H04L12/26 ,  H04L12/721 ,  H04W28/06 ,  H04W84/18

CPC分类号： H04L45/123 ,  H04W28/06 ,  H04W84/18

摘要： A method for realizing route discovery in a network includes: classifying a level of a node in the network; receiving a route request packet from a node adjacent to the node; comparing a node level indicated by node level information contained in the received route request packet with the level of the node; updating, in a case where the level of the node is higher than the node level indicated by the node level information contained in the route request packet, the node level indicated by the node level information contained in the route request packet to be the level of the node; and forwarding the updated route request packet to other nodes adjacent to the node.

摘要翻译： 一种在网络中实现路由发现的方法包括：对网络中的节点进行分级; 从与所述节点相邻的节点接收路由请求分组; 将由接收的路由请求分组中包含的节点级别信息指示的节点级别与节点的级别进行比较; 更新在节点的级别高于由包含在路由请求分组中的节点级别信息指示的节点级别的情况下，由路由请求分组中包含的节点级别信息指示的节点级别为 节点; 并将更新的路由请求分组转发到与该节点相邻的其他节点。

公开(公告)号：US08334791B2

公开(公告)日：2012-12-18

申请号：US12883841

申请日：2010-09-16

申请人： Kazuyuki Ozaki ,  Yuuta Nakaya ,  Makoto Yoshida

发明人： Kazuyuki Ozaki ,  Yuuta Nakaya ,  Makoto Yoshida

IPC分类号： G08G1/00 ,  G08B1/08 ,  H04B17/00 ,  B60Q1/00

CPC分类号： H04W72/085 ,  G07C5/008 ,  G08G1/096783

摘要： A communication system includes a roadside unit and a mobile communication unit that communicates with the roadside unit by using one of a plurality of communication channels. The mobile communication unit obtains, for each communication channel, a reception condition measurement representing the reception condition of a radio signal received from the roadside unit, creates information of a candidate channel for a receiving channel to be used to receive the radio signal from the roadside unit, and reports the candidate channel information to the roadside unit. On the other hand, the roadside unit assigns the receiving channel by selecting it from among the candidate channels, and reports the receiving channel to the mobile communication unit.

摘要翻译： 通信系统包括路边单元和移动通信单元，其通过使用多个通信信道之一与路侧单元进行通信。 移动通信单元对于每个通信信道，获得表示从路边单元接收到的无线信号的接收状态的接收状态测定，生成用于从路边接收无线信号的接收信道的候补信道的信息 单位，并将候选频道信息报告给路边单元。 另一方面，路侧单元通过从候选信道中进行选择来分配接收信道，并将接收信道报告给移动通信单元。

公开(公告)号：US08040922B2

公开(公告)日：2011-10-18

申请号：US12044122

申请日：2008-03-07

申请人： Xin Wang ,  Yuuta Nakaya ,  Syuusaku Suzuki ,  Michiharu Nakamura ,  JianMin Zhou ,  Hiroyuki Hayashi

发明人： Xin Wang ,  Yuuta Nakaya ,  Syuusaku Suzuki ,  Michiharu Nakamura ,  JianMin Zhou ,  Hiroyuki Hayashi

IPC分类号： H04J3/06

CPC分类号： H04L27/2656 ,  H04L27/2676

摘要： The present invention relates to an apparatus and method of frame synchronization in broad band wireless communication systems. In an apparatus of frame synchronization in a mobile station, a time variant phase rotation compensator eliminates time variant phase rotation carried in received signals by conjugated multiplication between adjacent signal samples. Then, the processed signal is fed into a delay correlator to calculate a plurality of correlations between two successive frames. A local power calculator acquires an average power of several symbols centered on delayed correlation values. A normalizer normalizes the delayed correlation values with a local average power corresponding to the delayed correlation values. A maximum value detector selects the maximum value from normalized correlation values to trigger frame synchronizing and timing signals.

摘要翻译： 本发明涉及宽带无线通信系统中帧同步的装置和方法。 在移动台中的帧同步装置中，时变相位旋转补偿器通过相邻信号样本之间的共轭乘法来消除接收信号中携带的时变相位旋转。 然后，将经处理的信号馈送到延迟相关器中以计算两个连续帧之间的多个相关性。 局部功率计算器以延迟相关值为中心获取几个符号的平均功率。 归一化器用对应于延迟相关值的局部平均功率来对延迟的相关值进行归一化。 最大值检测器从归一化相关值中选择最大值以触发帧同步和定时信号。

公开(公告)号：US20090296862A1

公开(公告)日：2009-12-03

申请号：US12356688

申请日：2009-01-21

申请人： Yuuta Nakaya

发明人： Yuuta Nakaya

IPC分类号： H04L27/06

CPC分类号： H04L27/2662 ,  H04L27/2607 ,  H04L27/2671 ,  H04L27/2676

摘要： A receiving apparatus that can properly determine the position of an effective symbol included in a received signal is provided. A receiver acquires a signal from a sending apparatus that transmits a signal into which a guard interval which is a replica of at least part of an effective symbol is inserted between the effective symbol and another effective symbol. A timing detector finds a correlation between the received signal and a signal obtained by shifting the received signal in a time direction, detects timing at which a maximum correlation value is obtained, and determines that timing which is predetermined time (>0) away from the timing detected is a position of an effective symbol included in the received signal.

摘要翻译： 提供了可以适当地确定包括在接收信号中的有效符号的位置的接收装置。 接收器从发送装置获取信号，发送装置将有效符号的至少一部分的复制品的保护间隔插入到有效符号与另一有效符号之间的信号。 定时检测器发现接收信号与通过在时间方向上移位接收信号而获得的信号之间的相关性，检测获得最大相关值的定时，并确定距离该预定时间（> 0）的定时 检测到的定时是包括在接收信号中的有效符号的位置。

公开(公告)号：US07512384B2

公开(公告)日：2009-03-31

申请号：US11044628

申请日：2005-01-27

申请人： Takeshi Toda ,  Takeshi Takano ,  Yuuta Nakaya ,  Yasuyuki Oishi

发明人： Takeshi Toda ,  Takeshi Takano ,  Yuuta Nakaya ,  Yasuyuki Oishi

IPC分类号： H03C1/52

CPC分类号： H01Q3/26 ,  H01Q3/2605 ,  H01Q3/36 ,  H01Q9/0442 ,  H04B1/18

摘要： A control unit and a control method are disclosed. First and second changing units change impedances of two or more first and second components within predetermined first and second ranges, respectively, the first and the second components affecting an output signal. An evaluation function value calculating unit calculates an evaluation function value that is dependent on the impedances of the first and the second components. A gradient vector calculating unit calculates a gradient vector based on the difference between the evaluation function values before and after the impedance change of the second components. Based on the gradient vector, impedance of each of the first components is changed such that the evaluation function value takes a desired value.

摘要翻译： 公开了一种控制单元和控制方法。 第一和第二改变单元分别在预定的第一和第二范围内改变两个或更多个第一和第二分量的阻抗，第一和第二分量影响输出信号。 评估函数值计算单元计算依赖于第一和第二分量的阻抗的评估函数值。 梯度矢量计算单元基于第二分量的阻抗变化前后的评价函数值之差来计算梯度矢量。 基于梯度矢量，改变每个第一分量的阻抗，使得评估函数值取所需值。

公开(公告)号：US20070223603A1

公开(公告)日：2007-09-27

申请号：US11475960

申请日：2006-06-28

申请人： Atsushi Honda ,  Yuuta Nakaya ,  Michiharu Nakamura

发明人： Atsushi Honda ,  Yuuta Nakaya ,  Michiharu Nakamura

IPC分类号： H04K1/10

CPC分类号： H04L27/265 ,  H04L27/2633

摘要： The present invention provides a wireless terminal apparatus, including a reception unit for receiving a multi-carrier signal generated by applying an N-point (where N is a natural number) inverse fast Fourier transform (IFFT) to a plurality of sub-carriers to which transmission information for a plurality of wireless terminal apparatuses is allocated; a fast Fourier transform unit for extracting a plurality of the sub-carriers from the multi-carrier signal; a thin-out unit, being placed at the front stage of the fast Fourier transform unit, capable of changing, from the N points, a sampling number of the multi-carrier signals which are digitalized; and a judgment unit for discerning, based on sub-carrier allocation information accompanying the multi-carrier signal, whether or not the sub-carrier of another wireless terminal apparatus overlaps with that of the wireless terminal apparatus itself in the case of changing the sampling number from the N points, and determining a sampling number for the thin-out unit.

摘要翻译： 本发明提供一种无线终端装置，包括：接收单元，用于接收通过向多个子载波应用N点（其中N为自然数）的快速傅里叶逆变换（IFFT）而生成的多载波信号， 分配用于多个无线终端装置的发送信息; 快速傅立叶变换单元，用于从多载波信号中提取多个子载波; 放置在快速傅里叶变换单元的前级的薄型单元，能够从N点改变数字化的多载波信号的采样数; 以及判断单元，用于基于伴随多载波信号的子载波分配信息，在改变采样数的情况下，确定另一无线终端装置的副载波与无线终端装置本身的副载波是否重叠 从N个点，并确定薄化单元的采样数。

公开(公告)号：US20070205959A1

公开(公告)日：2007-09-06

申请号：US11471304

申请日：2006-06-20

申请人： Yuuta Nakaya ,  Ichirou Ida ,  Atsushi Honda

发明人： Yuuta Nakaya ,  Ichirou Ida ,  Atsushi Honda

IPC分类号： H01Q3/24

CPC分类号： H01Q21/24 ,  H01Q3/24 ,  H01Q9/0435 ,  H01Q9/30 ,  H01Q9/36 ,  H01Q21/28 ,  H04B7/0686

摘要： At least two antennas are selected from a plurality of antennas which consist of at least two antennas having polarization characteristics or directivities different from one another, and which are arranged such that spatial fading correlations between the antennas are low, and a multiple input multiple output communication is conducted by using the selected antennas.

摘要翻译： 从具有彼此不同的偏振特性或方向性的至少两个天线组成的多个天线中选择至少两个天线，并且被布置成使得天线之间的空间衰落相关性低，并且多输入多输出通信 通过使用所选择的天线进行。

公开(公告)号：US20120134336A1

公开(公告)日：2012-05-31

申请号：US13238517

申请日：2011-09-21

申请人： Yuuta Nakaya ,  Takeshi Takano ,  Tamio Saito ,  Makoto Yoshida ,  Takanori Iwamatsu ,  Naoyuki Saito

发明人： Yuuta Nakaya ,  Takeshi Takano ,  Tamio Saito ,  Makoto Yoshida ,  Takanori Iwamatsu ,  Naoyuki Saito

IPC分类号： H04W72/04 ,  H04W4/22

CPC分类号： G08G1/161 ,  G08G1/091 ,  G08G1/094 ,  H04W4/046 ,  H04W72/02

摘要： A communication device is used by a mobile station to perform wireless communication with another mobile station. The communication device includes a processor configured to set a transmission resource according to a present position of the mobile station, the transmission resource being set based on transmission resource association information including different transmission resources assigned to plural assignment areas provided at different positions along a road through which the mobile station passes; and a transmitter configured to transmit data with the use of the transmission resource that has been set.

摘要翻译： 移动台使用通信装置与另一移动台进行无线通信。 通信装置包括：处理器，被配置为根据移动台的当前位置设置传输资源;传输资源根据传输资源关联信息进行设置;传输资源关联信息包括分配给多个分配区域的传输资源，该多个分配区域设置在沿着道路的不同位置 移动台通过; 以及发送器，被配置为使用已经设置的传输资源来发送数据。

公开(公告)号：US20110063130A1

公开(公告)日：2011-03-17

申请号：US12883841

申请日：2010-09-16

申请人： Kazuyuki OZAKI ,  Yuuta Nakaya ,  Makoto Yoshida

发明人： Kazuyuki OZAKI ,  Yuuta Nakaya ,  Makoto Yoshida

IPC分类号： G08G1/09

CPC分类号： H04W72/085 ,  G07C5/008 ,  G08G1/096783

摘要： A communication system includes a roadside unit and a mobile communication unit that communicates with the roadside unit by using one of a plurality of communication channels. The mobile communication unit obtains, for each communication channel, a reception condition measurement representing the reception condition of a radio signal received from the roadside unit, creates information of a candidate channel for a receiving channel to be used to receive the radio signal from the roadside unit, and reports the candidate channel information to the roadside unit. On the other hand, the roadside unit assigns the receiving channel by selecting it from among the candidate channels, and reports the receiving channel to the mobile communication unit.

摘要翻译： 通信系统包括路边单元和移动通信单元，其通过使用多个通信信道之一与路侧单元进行通信。 移动通信单元对于每个通信信道，获得表示从路边单元接收到的无线信号的接收状态的接收状态测定，生成用于从路边接收无线信号的接收信道的候补信道的信息 单位，并将候选频道信息报告给路边单元。 另一方面，路侧单元通过从候选信道中进行选择来分配接收信道，并将接收信道报告给移动通信单元。

公开(公告)号：US07831232B2

公开(公告)日：2010-11-09

申请号：US11471326

申请日：2006-06-20

申请人： Yuuta Nakaya

发明人： Yuuta Nakaya

IPC分类号： H04B7/08

CPC分类号： H04B7/0808 ,  H04B7/0874

摘要： Signal to interference plus noise ratio information, delay spread information, or condition number information of a channel matrix in a multiple input multiple output communication are taken into account in addition to spatial fading correlation information for selecting a combination of at least two antennas from a plurality of antennas, then, the multiple input multiple output communication is conducted by using the selected antennas.

摘要翻译： 除了用于从多个输入多输入通信中选择至少两个天线的组合的空间衰落相关信息之外，还考虑信号与干扰加噪声比信息，延迟扩展信息或多输入多输出通信中的信道矩阵的条件数信息 的天线，则通过使用所选择的天线来进行多输入多输出通信。