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1. 发明授权

US07319684B2 System and method for wireless communication using a management server and access points 有权
标题翻译：使用管理服务器和接入点进行无线通信的系统和方法
公开(公告)号：US07319684B2
公开(公告)日：2008-01-15
申请号：US10449100
申请日：2003-06-02
申请人： Tsuyoshi Tamaki , Takashi Yano , Takaki Uta , Tomoaki Ishifuji
发明人： Tsuyoshi Tamaki , Takashi Yano , Takaki Uta , Tomoaki Ishifuji
IPC分类号： H04B7/212 , H04B7/00 , H04J3/06
CPC分类号： H04W52/243 , H04L41/00 , H04W16/28 , H04W28/14 , H04W72/1231 , H04W74/0816
摘要： A system and method are provided for wireless communication. In one example, a wireless communication system that enhances total system throughput is provided. The system performs parallel data transmission from a plurality of access points to a plurality of user terminals. On terminals with power control function, their transmit power can be set to minimize interference. The wireless communication system comprises a management server which performs centralized management of time of access-point-to-terminal packet transmission, access points, and user terminals that perform data transmission, according to transmission time control information from the management server. Transmit queues for measuring downlink traffic and receive queues for measuring uplink traffic are provided on the access points or the management server. The system determines uplink and downlink periods from the transmit and receive queue lengths. The system also controls the access points and user terminals to transmit for the determined periods. Consequently, packet collision due to transmission from a terminal that interferes with neighboring terminals is eliminated. Thus, system throughput is enhanced.
摘要翻译：提供了一种用于无线通信的系统和方法。在一个示例中，提供了增强总系统吞吐量的无线通信系统。系统执行从多个接入点到多个用户终端的并行数据传输。在具有电源控制功能的终端上，可以设置其发射功率以最小化干扰。无线通信系统包括管理服务器，其根据来自管理服务器的传输时间控制信息，对接入点到终端分组传输的时间进行集中管理，接入点和执行数据传输的用户终端。在接入点或管理服务器上提供用于测量下行链路流量的发送队列和用于测量上行链路流量的接收队列。系统从发送和接收队列长度确定上行链路和下行链路周期。系统还控制接入点和用户终端在确定的时间段内进行传输。因此，消除了来自与邻近终端干扰的终端的传输的分组冲突。因此，提高了系统吞吐量。

2. 发明授权

US08310995B2 Systems and methods for wireless communication using SDMA 有权
标题翻译：使用SDMA进行无线通信的系统和方法
公开(公告)号：US08310995B2
公开(公告)日：2012-11-13
申请号：US11797321
申请日：2007-05-02
申请人： Shinji Murai , Tomoaki Ishifuji , Takashi Yano , Masaaki Shida , Shigenori Hayase
发明人： Shinji Murai , Tomoaki Ishifuji , Takashi Yano , Masaaki Shida , Shigenori Hayase
IPC分类号： H04W4/00
CPC分类号： H04W72/085 , H04W28/18 , H04W72/046
摘要： In a wireless communication system for communicating with a plurality of stations at the same point of time with the same frequency using a Space Division Multiple Access (SDMA), wireless resources are allocated by a first decision unit which evaluates performance of each station obtained when the SDMA is used and which determines periods of time to be allocated to groups of stations formed according to the SDMA technique. Using a first evaluation unit and a second evaluation unit to evaluate performance required by each station and each application, the first decision unit allocates the wireless resources to the stations. It is therefore possible that the wireless resources are efficiently allocated to the stations while preventing an event in which the wireless resources are excessive or insufficient for required quality of service.
摘要翻译：在用于使用空分多址（SDMA）以相同频率在同一时间点与多个站进行通信的无线通信系统中，无线资源由第一决策单元分配，该第一决策单元评估当使用SDMA，并确定要分配给根据SDMA技术形成的站组的时间段。使用第一评估单元和第二评估单元来评估每个站点和每个应用所需的性能，第一决策单元向站点分配无线资源。因此，可以将无线资源有效地分配给站，同时防止无线资源过多或不足以满足所需服务质量的事件。

3. 发明申请

US20070274256A1 Systems and methods for wireless communication 有权
标题翻译：用于无线通信的系统和方法
公开(公告)号：US20070274256A1
公开(公告)日：2007-11-29
申请号：US11797321
申请日：2007-05-02
申请人： Shinji Murai , Tomoaki Ishifuji , Takashi Yano , Masaaki Shida , Shigenori Hayase
发明人： Shinji Murai , Tomoaki Ishifuji , Takashi Yano , Masaaki Shida , Shigenori Hayase
IPC分类号： H04Q7/00
CPC分类号： H04W72/085 , H04W28/18 , H04W72/046
摘要： In a wireless communication system for communicating with a plurality of stations at the same point of time with the same frequency using a Space Division Multiple Access (SDMA), wireless resources are allocated by a first decision unit which evaluates performance of each station obtained when the SDMA is used and which determines periods of time to be allocated to groups of stations formed according to the SDMA technique. Using a first evaluation unit and a second evaluation unit to evaluate performance required by each station and each application, the first decision unit allocates the wireless resources to the stations. It is therefore possible that the wireless resources are efficiently allocated to the stations while preventing an event in which the wireless resources are excessive or insufficient for required quality of service.
摘要翻译：在用于使用空分多址（SDMA）以相同频率在同一时间点与多个站进行通信的无线通信系统中，无线资源由第一决策单元分配，该第一决策单元评估当使用SDMA，并确定要分配给根据SDMA技术形成的站组的时间段。使用第一评估单元和第二评估单元来评估每个站点和每个应用所需的性能，第一决策单元向站点分配无线资源。因此，可以将无线资源有效地分配给站，同时防止无线资源过多或不足以满足所需服务质量的事件。

4. 发明授权

US06556943B2 Position calculation method and position calculation apparatus 有权
公开(公告)号：US06556943B2
公开(公告)日：2003-04-29
申请号：US09918641
申请日：2001-08-01
申请人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
发明人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
IPC分类号： H04Q720
CPC分类号： G01S5/14
摘要： A position calculation method that calculates the correct position of a terminal even when errors are not distributed symmetrically for positive and negative values, by calculating the position of a terminal using the delay time of received signals. The method calculates a first range that is a difference between a range from the terminal to each of antenna and a range from the terminal to a base antenna, the range being calculated from a wireless signal delay time; calculates a second range that is a difference between a range from an assumed terminal position for calculation to each antenna and a range from the assumed terminal position for calculation to the base antenna; calculates a likelihood of the position of the terminal, repeats these procedures to obtain a point where the likelihood is maximized, and determines an obtained most likely solution as the position of the terminal.

5. 发明授权

US07006475B1 Mobile communication method using CDMA multiplexing technique and mobile communication system 失效
标题翻译：使用CDMA复用技术和移动通信系统的移动通信方法
公开(公告)号：US07006475B1
公开(公告)日：2006-02-28
申请号：US09786685
申请日：1999-12-21
申请人： Toshiro Suzuki , Takashi Yano , Takaki Uta , Katsuhiko Tsunehara , Hisato Iwai
发明人： Toshiro Suzuki , Takashi Yano , Takaki Uta , Katsuhiko Tsunehara , Hisato Iwai
IPC分类号： H04B7/216
CPC分类号： H04B7/2618
摘要： On the side of a mobile station, interference of a perch channel with call control information or a traffic channel is reduced, realizing stable communication. In a method of CDMA communication in which communication is made through the traffic channel for transmitting user data and the perch channel for transmitting a spreading code used for demodulation of the user data, the traffic channel has a call control channel subjected to the time division multiplex, and that call control channel and a part of the perch channel, which is non-orthogonal to the call control channel, are arranged not to overlap with each other in a time base.
摘要翻译：在移动台侧，导频信道与呼叫控制信息或业务信道的干扰减少，实现稳定的通信。在通过用于发送用户数据的业务信道进行通信并且用于发送用于解调用户数据的扩展码的导频信道的CDMA通信的方法中，业务信道具有经过时分复用的呼叫控制信道，并且该呼叫控制信道和与呼叫控制信道非正交的导频信道的一部分被布置为在时基上彼此不重叠。

6. 发明授权

US06671649B2 Position calculation method and position calculation apparatus 失效
公开(公告)号：US06671649B2
公开(公告)日：2003-12-30
申请号：US10390721
申请日：2003-03-19
申请人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
发明人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
IPC分类号： G01C1700
CPC分类号： G01S5/14
摘要： A position calculation method that calculates the correct position of a terminal even when errors are not distributed symmetrically for positive and negative values, by calculating the position of a terminal using the delay time of received signals. The method calculates a first range that is a difference between a range from the terminal to each of antenna and a range from the terminal to a base antenna, the range being calculated from a wireless signal delay time; calculates a second range that is a difference between a range from an assumed terminal position for calculation to each antenna and a range from the assumed terminal position for calculation to the base antenna; calculates a likelihood of the position of the terminal, repeats these procedures to obtain a point where the likelihood is maximized, and determines an obtained most likely solution as the position of the terminal.

7. 发明授权

US07061968B2 Mobile terminal, a base station, and a synchronization control method 失效
标题翻译：移动终端，基站和同步控制方法
公开(公告)号：US07061968B2
公开(公告)日：2006-06-13
申请号：US10847367
申请日：2004-05-18
申请人： Takashi Yano , Takaki Uta , Nobukazu Doi , Toshiro Suzuki
发明人： Takashi Yano , Takaki Uta , Nobukazu Doi , Toshiro Suzuki
IPC分类号： H04B1/69
CPC分类号： H04B1/70754 , H04B1/7073 , H04B1/7085 , H04B1/7113 , H04B1/7117
摘要： In a mobile communication system, the tracking of synchronization is conducted in a stable state even in a multipath environment. A delay profile detector calculates a delay profile a(n) using a despread signal for each processing unit n. A delay profile averaging unit averages a(n) to produce Ave(|a(n)|2). A data symbol detector conducts rake combining of the despread signal using a(n) and Ave(|a(n)|2). According to a(n) and Ave(|a(n)|2, a weighting function unit calculates a representative value representing delay waves. A loop filter generates a control signal in response to the representative value. A clock controller controls a spread code generator according to the control signal.
摘要翻译：在移动通信系统中，即使在多路径环境中，同步的跟踪仍处于稳定状态。延迟分布检测器使用每个处理单元n的去扩展信号来计算延迟分布a（n）。延迟分布平均单元平均化a（n）以产生Ave（| a（n）| ^{2）。数据符号检测器使用（n）和Ave（| a（n）| ^{2）进行解扩信号的前置合并。根据a（n）和Ave（| a（n）| ^{2 ，加权函数单元计算代表延迟波的代表值，环路滤波器响应于代表值产生控制信号。时钟控制器根据控制信号控制扩展码发生器。}}}

8. 发明申请

US20060092886A1 CDMA communication system and its transmission power control method 审中-公开
公开(公告)号：US20060092886A1
公开(公告)日：2006-05-04
申请号：US11300354
申请日：2005-12-15
申请人： Katsuhiko Tsunehara , Takashi Yano , Nobukazu Doi , Takaki Uta , Keiji Hasegawa
发明人： Katsuhiko Tsunehara , Takashi Yano , Nobukazu Doi , Takaki Uta , Keiji Hasegawa
IPC分类号： H04B7/216
CPC分类号： H04W52/54 , H04W52/146 , H04W52/245 , H04W52/58 , H04W88/08
摘要： An uplink channel transmission power control method is provided for a CDMA mobile communication system performing one way communication. A base station measures the received level of data transmitted from each mobile terminal at each channel, and generates a transmission power control signal of each uplink traffic channel. The generated transmission power control signals are multiplexed, and the multiplexed common transmission power control signal is transmitted to all mobile terminals by using the common channel shared by the mobile terminals. Each mobile terminal derives the transmission power control signal of the uplink traffic channel used by the terminal, from the received common transmission power control signal, and controls the transmission power of a data packet.

9. 发明授权

US06256341B1 Spread spectrum receiver using digital matched filter 失效
标题翻译：扩频接收机采用数字匹配滤波器
公开(公告)号：US06256341B1
公开(公告)日：2001-07-03
申请号：US09124233
申请日：1998-07-29
申请人： Masayuki Ariyoshi , Takashi Yano , Takaki Uta , Nobukazu Doi
发明人： Masayuki Ariyoshi , Takashi Yano , Takaki Uta , Nobukazu Doi
IPC分类号： H04K100
CPC分类号： H04B1/707
摘要： A spread spectrum receiver having a smaller circuit scale is accomplished by a circuit construction wherein the number of taps is set to a number smaller than a spread factor, and a cyclic accumulation process for determining a correlation value of one symbol is executed by a circuit construction using an input sequence register block in common with an addition block of a spread spectrum receiver by MF according to the prior art.
摘要翻译：具有较小电路规模的扩频接收机通过电路结构实现，其中抽头数被设置为小于扩展因子的数量，并且通过电路结构执行用于确定一个符号的相关值的循环累积处理根据现有技术，使用与MF的扩频接收机的加法块相同的输入序列寄存器块。

10. 发明授权

US6141337A Spread spectrum communication system 失效
标题翻译：扩频通信系统
公开(公告)号：US6141337A
公开(公告)日：2000-10-31
申请号：US917733
申请日：1997-08-27
申请人： Takaki Uta , Takashi Yano , Nobukazu Doi
发明人： Takaki Uta , Takashi Yano , Nobukazu Doi
IPC分类号： H04J13/00 , H04B1/7075 , H04B7/26 , H04L25/40 , H04W56/00 , H04W76/02 , H04J3/06
CPC分类号： H04W56/009 , H04B1/707 , H04B7/2668 , H04J13/16
摘要： Before transmitting an upward traffic packet of a long code, a mobile terminal sends a short packet including a short code to a reservation channel. A base station measures delay of each packet by an initial acquisition circuit to establish chip synchronization timing and a packet de-multiplexer to separate from each other packets overlapped in time with each other. When spreading the long-code packet transmitted via a traffic channel from the mobile terminal, information of the measured delay time is synchronously despread by setting a coefficient at an appropriate point of timing to a matched filter.
摘要翻译：在发送长码的向上业务分组之前，移动终端向预留信道发送包括短码的短分组。基站通过初始采集电路测量每个分组的延迟，以建立码片同步定时和分组去多路复用器彼此分离，以便彼此重叠。当通过业务信道从移动终端发送的长码分组进行扩展时，通过将适当时间点的系数设置为匹配滤波器来同步地解扩所测量的延迟时间的信息。

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