公开(公告)号：US07085564B2

公开(公告)日：2006-08-01

申请号：US10372326

申请日：2003-02-25

申请人： Fumihiro Nishiyama ,  Takushi Kunihiro ,  Tomoya Yamaura ,  Kazuyuki Sakoda

发明人： Fumihiro Nishiyama ,  Takushi Kunihiro ,  Tomoya Yamaura ,  Kazuyuki Sakoda

IPC分类号： H04Q7/20

CPC分类号： H04W48/12 ,  Y02D70/142

摘要： Under a multi-cell radio communication environment where connection between cells or TDMA frame synchronization is not established, a mobile station carries out an adjacent cell search under low power consumption. Adjacent cell information acquired through search by the mobile station is managed centered on a base station and may be provided by the base station as adjacent cell information, when the mobile station carries out the adjacent cell search. The adjacent cell information includes, for example, a TDMA frame offset between cells so that the mobile station receives a broadcast channel of the adjacent cell at appropriate timing based on the adjacent cell information and therefore does not need to perform unnecessary reception operation in the event of a handoff.

公开(公告)号：US20060025136A1

公开(公告)日：2006-02-02

申请号：US11172917

申请日：2005-07-05

申请人： Chihiro Fujita ,  Kazuyuki Sakoda

发明人： Chihiro Fujita ,  Kazuyuki Sakoda

IPC分类号： H04Q7/20

CPC分类号： H04W74/0816 ,  H04W52/241 ,  H04W84/18

摘要： A radio communication system includes a plurality of radio communication stations. Each radio communication station performs a random-access operation in a communication environment having a plurality of available communication channels, and assigns a communication channel on a per packet basis to transmit a packet.

摘要翻译： 无线电通信系统包括多个无线电通信站。 每个无线电通信站在具有多个可用通信信道的通信环境中执行随机接入操作，并且以每个分组为基础分配通信信道以发送分组。

公开(公告)号：US20050227615A1

公开(公告)日：2005-10-13

申请号：US11019417

申请日：2004-12-23

申请人： Kazuyuki Sakoda

发明人： Kazuyuki Sakoda

IPC分类号： H04L12/28 ,  H04B7/14 ,  H04B7/26 ,  H04W48/08 ,  H04W52/02 ,  H04W74/08 ,  H04W76/02 ,  H04W84/12 ,  H04W84/18

CPC分类号： H04W48/08 ,  H04W52/0216 ,  H04W52/0219 ,  H04W84/18 ,  Y02D70/122 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/22

摘要： In order to realize low power consumption of a communicator and information transmission in short packets with a short latency in a network environment of a self-organized distribution type, each communication station performs a reception processing before and after a beacon transmission time of a next communication station which transmits a beacon next to a local station, and performs data transmission before and after a beacon transmission time of a communication station functioning as a data transmission destination. In a case where a certain communication station transmits information to all other communication stations, each communication station transmits information by utilizing a reception period provided after the beacon transmission time of the next communication station transmitting the beacon next to the local station to perform transmission according to a bucket-brigade system.

摘要翻译： 为了在自组织分配类型的网络环境中实现通信器的低功耗和具有短延迟的短分组中的信息传输，每个通信站在下一个通信的信标发送时间之前和之后执行接收处理 在本地站旁边发送信标的站，并且在作为数据发送目的地的通信站的信标发送时间之前和之后执行数据传输。 在某个通信站向所有其他通信站发送信息的情况下，每个通信站通过利用在本地站旁边发送下一个通信站的信标发送时间之后提供的接收周期来发送信息，以根据 一个斗旅系统。

公开(公告)号：US20050201361A1

公开(公告)日：2005-09-15

申请号：US11031132

申请日：2005-01-10

申请人： Yuichi Morioka ,  Kazuyuki Sakoda ,  Shinichi Kuroda ,  Ryo Sawai

发明人： Yuichi Morioka ,  Kazuyuki Sakoda ,  Shinichi Kuroda ,  Ryo Sawai

IPC分类号： H04B7/212 ,  H04J3/22 ,  H04L12/66

CPC分类号： H04W74/085

摘要： Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded.

摘要翻译： 在具有不同传输速率的多种通信模式与小开销共存的通信环境下执行随机接入操作。 高级通信站欺骗解码部分中的分组长度和速率的信息，使得（分组长度）/（速率）的值对应于希望停止通信的持续时间。 接收到欺骗信息的其他站在由（分组长度）/（速率）的值指定的间隔期间以指定的速率接收分组的其余部分。 在这种情况下，分组长度和速率不是实际发送的分组的长度，所以丢弃该分组。

公开(公告)号：US20050163240A1

公开(公告)日：2005-07-28

申请号：US11085490

申请日：2005-03-21

申请人： Kazuyuki Sakoda ,  Mitsuhiro Suzuki

发明人： Kazuyuki Sakoda ,  Mitsuhiro Suzuki

IPC分类号： H04J11/00 ,  H04B3/10 ,  H04L27/26 ,  H04L27/28

CPC分类号： H04L27/2601

摘要： A transmitting apparatus, receiving apparatus, communication system, and a signal processing method for each apply a suitable modulation method and transmission path estimation method in accordance with the characteristics of the transmission information and capable of improving the transmission efficiency. At the transmission side, the method of estimation of the transmission path and the modulation method are selected in accordance with an attribute of the data to be transmitted, for example, the size of a packet to be transmitted, the transmission data is mapped by the selected modulation method, the signal is processed in accordance with the transmission path estimation method, and a transmission signal is created by increase fast Fourier transform processing and transmitted. At the reception side, the received signal is fast Fourier transformed, the transmission path is estimated by the transmission path estimation method selected at the transmission side, the received signal is corrected in accordance with the result, and the received data is reproduced in accordance with the modulation method. Therefore, it is possible to always adopt the optimum transmission method in accordance with the attribute of the transmission data etc. and possible to realize an improvement of a transmission efficiency and an enhancement of the quality of communication.

公开(公告)号：US20050068934A1

公开(公告)日：2005-03-31

申请号：US10500591

申请日：2004-02-03

申请人： Kazuyuki Sakoda

发明人： Kazuyuki Sakoda

IPC分类号： H04L12/28 ,  H04J3/06

CPC分类号： H04W16/00 ,  H04L5/0058 ,  H04W48/08 ,  H04W52/0216 ,  H04W56/002 ,  H04W72/0446 ,  H04W84/12 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/22

摘要： It is necessary to solve problems caused when constituting a communication system such as a radio LAN using an independent distributed type network without the controlling-controllable relationship of a master station and a slave station. In the radio communication system consisting of a plurality of communication stations having no relationship of a controlling station and a controllable station, each communication station transmits a beacon describing information on the network, thereby constituting a network. Through this beacon, it is possible to make a sophisticated judgment on the communication state in the other communication station.

摘要翻译： 需要解决在构成无线LAN的通信系统时使用独立的分布型网络而引起的问题，而无需主站和从站的控制可控关系。 在由没有控制站和可控站的关系的多个通信站组成的无线通信系统中，每个通信站在网络上发送描述信息的信标，从而构成网络。 通过该信标，可以对其他通信站中的通信状态进行复杂的判断。

公开(公告)号：US06816555B2

公开(公告)日：2004-11-09

申请号：US09783809

申请日：2001-02-15

申请人： Kazuyuki Sakoda

发明人： Kazuyuki Sakoda

IPC分类号： H04K110

CPC分类号： H04L5/0007 ,  H04H20/72 ,  H04H20/95 ,  H04L5/023 ,  H04L27/2628 ,  H04L27/265 ,  H04L27/2657

摘要： A communication apparatus, a signal component demultiplexing apparatus, and a filter apparatus for reducing a load of FFT processing in a receiver in multi-carrier communication, wherein the receiving apparatus provides a signal component demultiplexing apparatus before an FFT circuit and extracts only the required symbol series and the signal component demultiplexing apparatus has hierarchically arranged branching circuits each including a symbol delay circuit, a phase offset adjustment circuit, an adder circuit, and a subtractor circuit, one symbol string being output from the adder circuit and another symbol string being output from the subtractor circuit.

公开(公告)号：US06587510B1

公开(公告)日：2003-07-01

申请号：US09204295

申请日：1998-12-03

申请人： Hideki Minami ,  Tomoya Yamaura ,  Kazuyuki Sakoda ,  Mitsuhiro Suzuki

发明人： Hideki Minami ,  Tomoya Yamaura ,  Kazuyuki Sakoda ,  Mitsuhiro Suzuki

IPC分类号： H04B1500

CPC分类号： H04W52/56 ,  H04W52/58

摘要： A control information transmitting method for controlling transmission power, wherein a control symbol obtained by assigning control information for controlling transmission power to symbols of phase modulation is transmitted to a communication partner so as to control the transmission power of the communication partner, the control information which represents raising the transmission power of communication partner and the control information which represents lowering the transmission power of the communication partner are assigned to a pair of symbols having the longest Euclidian distance among the symbols of phase modulation. Whereby, even if receiving noise or interference are present during transmission, the control information can be prevented from being misjudged because the distance on the signal constellation is farthest apart from each other, so that the control information can be transmitted exactly.

摘要翻译： 一种用于控制发送功率的控制信息发送方法，其中通过将用于控制发送功率的控制信息分配给相位调制符号而获得的控制符号被发送到通信对方，以便控制通信伙伴的发送功率，控制信息 表示提高通信对方的发送功率，并且将表示降低通信对方的发送功率的控制信息分配给相位调制符号中具有最长欧几里德距离的一对符号。 由此，即使在发送期间存在接收到噪声或干扰的情况下，由于信号星座上的距离彼此距离最远，所以可以防止控制信息被错误判断，从而能够准确地发送控制信息。

公开(公告)号：US06532223B1

公开(公告)日：2003-03-11

申请号：US09161616

申请日：1998-09-28

申请人： Kazuyuki Sakoda ,  Mitsuhiro Suzuki

发明人： Kazuyuki Sakoda ,  Mitsuhiro Suzuki

IPC分类号： H04J300

CPC分类号： H04W48/16 ,  H04B7/2656 ,  H04W36/08

摘要： A terminal in a wireless telephone system can efficiently search for available base stations. Communication of user information between a base station and a terminal is intermittently performed in a predetermined time slot period. The transmission and reception of user information at the terminal are stopped at once in a plurality of predetermined time slot periods in such intermittent communication. The cell search for receiving a frequency channel in which control information is transmitted from the base station is performed, so that available base stations are searched. The number of cell search periods can be increased or decreased from time to time.

摘要翻译： 无线电话系统中的终端可以有效地搜索可用的基站。 基站和终端之间的用户信息的通信在预定的时隙周期中被间歇地执行。 在这种间歇通信中，终端处的用户信息的发送和接收在多个预定时隙周期中一次停止。 执行接收从基站发送控制信息的频道的小区搜索，从而搜索可用的基站。 小区搜索周期的数量可以不时地增加或减少。

公开(公告)号：US06519292B1

公开(公告)日：2003-02-11

申请号：US09252808

申请日：1999-02-19

申请人： Kazuyuki Sakoda ,  Mitsuhiro Suzuki

发明人： Kazuyuki Sakoda ,  Mitsuhiro Suzuki

IPC分类号： H04L2704

CPC分类号： H04W52/267 ,  H04B1/707 ,  H04B7/264 ,  H04L5/026 ,  H04L27/2608

摘要： A transmission method and apparatus which perform communication without interfering with other types of communication is provided. A transmission symbol stream is generated by applying predetermined modulation processing to an encoded bit series obtained by encoding an information bit series of a predetermined transmission rate. A transmission signal generated by applying the transmission processing to the transmission symbol series is then transmitted. A transmission-information bit series with a transmission rate lower than the predetermined transmission rate is generated first. Transmission of the transmission signal generated in accordance with the transmission-information bit series then begins through a predetermine communication channel. The low transmission rate is then sequentially stepwise increased to the predetermined transmission rate. Transmission is performed while sequentially stepwise increasing the number of communication channels in accordance with the sequential stepwise increase of the low transmission rate.

摘要翻译： 提供一种在不干扰其他类型的通信的情况下执行通信的传输方法和装置。 通过对通过对预定传输速率的信息比特序列进行编码而获得的编码比特序列应用预定的调制处理来生成发送符号流。 然后发送通过对发送符号序列应用发送处理而生成的发送信号。 首先产生具有低于预定传输速率的传输速率的传输信息比特序列。 根据传输信息比特序列生成的传输信号的传输开始于预定的通信信道。 然后，低传输速率依次逐步增加到预定的传输速率。 在按照逐步增加低传输速率的顺序逐步增加通信信道的数量的同时顺序地增加传输。