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61. 发明申请

US20080052577A1 CIRCUIT AND METHOD FOR CONTROLLING QUALITY OF RANDOM NUMBERS 有权
标题翻译：用于控制随机数的质量的电路和方法
公开(公告)号：US20080052577A1
公开(公告)日：2008-02-28
申请号：US11621872
申请日：2007-01-10
申请人： Akihiro Tanaka , Akio Tajima , Seigo Takahashi , Wakako Maeda
发明人： Akihiro Tanaka , Akio Tajima , Seigo Takahashi , Wakako Maeda
IPC分类号： G01R31/28
CPC分类号： H04L9/0852 , G06F7/58 , H04L9/0838
摘要： A random number quality control circuit capable of fast control of the level of random number quality is present. When a “0” output section and a “1” output section generate random numbers by individually receiving a random number signal, a random number quality monitor monitors an unbalance between the numbers of “0”s and “1”s. If a deviation from a desired ratio is found, a drive controller controls the reception characteristics of the “0” output section and “1” output section individually so that the deviation will be compensated for. The amount of information intercepted between a sender and a receiver can be reduced by maintaining the mark ratio of shared random numbers at 50%.
摘要翻译：存在能够快速控制随机数质量水平的随机数质量控制电路。当“0”输出部分和“1”输出部分通过分别接收随机数信号产生随机数时，随机数质量监视器监视“0”和“1”之间的不平衡。如果发现与期望比率的偏差，则驱动控制器分别控制“0”输出部分和“1”输出部分的接收特性，以便补偿偏差。通过将共享随机数的标记比维持在50％，可以减少发送方和接收方之间拦截的信息量。

62. 发明申请

US20080013738A1 Secret communications system and channel control method 有权
标题翻译：秘密通信系统和信道控制方法
公开(公告)号：US20080013738A1
公开(公告)日：2008-01-17
申请号：US11788239
申请日：2007-04-19
申请人： Akio Tajima , Akihiro Tanaka , Wakako Maeda , Seigo Takahashi
发明人： Akio Tajima , Akihiro Tanaka , Wakako Maeda , Seigo Takahashi
IPC分类号： H04L9/08 , H04L9/28
CPC分类号： H04L9/0852 , H04L9/0855
摘要： A secret communications system realizes point-to-multipoint or multipoint-to-multipoint connections of both quantum channels and classical channels. Multiple remote nodes are individually connected to a center node through optical fiber, and random-number strings K1 to KN are individually generated and shared between the respective remote nodes and the center node. Encrypted communication is performed between each remote node and the center node by using the corresponding one of the shared random-number strings K1 to KN as a cryptographic key. The center node is provided with a switch section for quantum channels and a switch section for classical channels. Switching control on each of these switch sections is performed independently of the other by a controller.
摘要翻译：秘密通信系统实现了量子通道和经典通道的点对多点或多点到多点连接。多个远程节点通过光纤单独连接到中心节点，并且在各个远程节点和中心节点之间分别生成并共享随机数字串K 1至KN。通过使用共享随机数字符串K 1至K N中的相应一个作为密码密钥，在每个远程节点和中心节点之间执行加密通信。中心节点设有用于量子通道的开关部分和经典通道的开关部分。这些开关部分中的每一个的开关控制由控制器独立地执行。

63. 发明申请

US20070230688A1 Secret communication system and method for generating shared secret information 有权
标题翻译：秘密通信系统和生成共享秘密信息的方法
公开(公告)号：US20070230688A1
公开(公告)日：2007-10-04
申请号：US11505814
申请日：2006-08-18
申请人： Akio Tajima , Akihiro Tanaka , Wakako Maeda , Seigo Takahashi
发明人： Akio Tajima , Akihiro Tanaka , Wakako Maeda , Seigo Takahashi
IPC分类号： H04L9/30
CPC分类号： H04L9/0858 , H04B10/70 , H04L9/0891
摘要： A user request can be reflected in the degree of security of an updated key in quantum key distribution. A sender and a receiver are connected through optical fiber. A quantum transmitter in the sender and a quantum receiver in the receiver carry out basis reconciliation and error correction through a quantum channel, based on a source of a key sent from the quantum transmitter and on a raw key received by the quantum receiver. Under the control of security control sections in the sender and receiver, the amount of information with the possibility of being intercepted that is determined in accordance with a degree of security requested by a user, is removed from the key information after error correction, whereby a final cryptographic key is generated. Secret communication is performed between encryption/decryption sections in the sender and receiver by using the cryptographic key thus updated.
摘要翻译：用户请求可以反映在量子密钥分发中更新密钥的安全程度。发送器和接收器通过光纤连接。发送器中的量子发射器和接收器中的量子接收器通过量子通道基于从量子发射器发送的密钥的源和由量子接收器接收的原始密钥来执行基础协调和纠错。在发送方和接收方的安全控制部分的控制下，根据用户要求的安全程度确定可能被拦截的信息量在纠错后从密钥信息中移除，由此生成最终加密密钥。通过使用由此更新的加密密钥在发送方和接收方的加密/解密部分之间执行秘密通信。

64. 发明申请

US20070009098A1 Communication system and method for controlling the same 有权
标题翻译：通信系统及其控制方法
公开(公告)号：US20070009098A1
公开(公告)日：2007-01-11
申请号：US11482131
申请日：2006-07-07
申请人： Akihiro Tanaka , Akio Tajima , Seigo Takahashi , Wakako Maeda
发明人： Akihiro Tanaka , Akio Tajima , Seigo Takahashi , Wakako Maeda
IPC分类号： H04L9/30
CPC分类号： H04L1/242 , H04L9/0858 , H04L2209/34
摘要： For an error rate QBER, threshold values are preset, including a threshold value Qbit for frame synchronization processing, a threshold value Qphase for phase correction processing, and a threshold value QEve for eavesdropping detection. Upon the distribution of a quantum key from a sender to a receiver, when the measurement value of QBER is deteriorated more than Qbit, frame synchronization processing is performed. When the measurement value of QBER is deteriorated more than Qphase, phase correction processing and frame synchronization processing are performed. When QBER does not become better than QEve even after these recovery-processing steps are repeated N times, it is determined that there is a possibility of eavesdropping, and the processing is stopped.
摘要翻译：对于错误率QBER，阈值被预设，包括用于帧同步处理的阈值Q SUB位，用于相位校正处理的阈值Q相位＆lt; / SUB＆gt;和阈值 Q 用于窃听检测。当量子密钥从发送器分配到接收器时，当QBER的测量值劣化到大于Q 时，执行帧同步处理。当QBER的测量值劣化到大于Q相位时，执行相位校正处理和帧同步处理。即使在这些恢复处理步骤重复N次之后，当QBER不比Q 变得更好时，确定存在窃听的可能性，并且停止处理。

65. 发明授权

US06957018B2 Optical packet exchange system and optical switch 失效
标题翻译：光分组交换系统和光开关
公开(公告)号：US06957018B2
公开(公告)日：2005-10-18
申请号：US10151789
申请日：2002-05-21
申请人： Soichiro Araki , Yoshihiko Suemura , Akio Tajima , Seigo Takahashi , Yoshiharu Maeno , Naoya Henmi
发明人： Soichiro Araki , Yoshihiko Suemura , Akio Tajima , Seigo Takahashi , Yoshiharu Maeno , Naoya Henmi
IPC分类号： H04B10/27 , H04B10/00 , H04L12/931 , H04Q3/00 , H04Q3/52 , H04Q11/00 , H04J14/00
CPC分类号： H04Q11/0001 , H04L49/25 , H04L49/30 , H04L49/50 , H04Q2011/0024 , H04Q2011/0039 , H04Q2011/0045 , H04Q2011/005
摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.
摘要翻译：一种光分组交换装置和光开关，其中，在没有要发送的分组的输入单元和没有要接收的分组的输出单元之间的连接模式的搜索被减少以便能够快速切换控制，即使在交换装置的信道数量增加或网络速度较高。提供多个输入单元，多个输出单元和光学开关。每个输入单元包括输入缓冲器单元，并行/串行转换单元，电/光转换单元和用于在不存在要发送的分组的情况下发送虚拟分组的虚拟分组插入单元。每个输出单元包括用于控制交换对方的交换对方争用解决单元，光/电转换单元，串行/并行转换单元和分组消除单元。交换对手争用解决单元控制分组消除单元以消除虚拟分组。

66. 发明授权

US06570687B2 Optical packet exchange system and optical switch 失效
公开(公告)号：US06570687B2
公开(公告)日：2003-05-27
申请号：US10123444
申请日：2002-04-16
申请人： Soichiro Araki , Yoshihiko Suemura , Akio Tajima , Seigo Takahashi , Yoshiharu Maeno , Naoya Henmi
发明人： Soichiro Araki , Yoshihiko Suemura , Akio Tajima , Seigo Takahashi , Yoshiharu Maeno , Naoya Henmi
IPC分类号： H04J1408
CPC分类号： H04Q11/0001 , H04L49/25 , H04L49/30 , H04L49/50 , H04Q2011/0024 , H04Q2011/0039 , H04Q2011/0045 , H04Q2011/005
摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.

67. 发明授权

US06373911B1 Bit synchronization circuit 有权
标题翻译：位同步电路
公开(公告)号：US06373911B1
公开(公告)日：2002-04-16
申请号：US09239090
申请日：1999-01-27
申请人： Akio Tajima , Yoshihiko Suemura , Soichiro Araki , Seigo Takahashi , Yoshiharu Maeno , Naoya Henmi
发明人： Akio Tajima , Yoshihiko Suemura , Soichiro Araki , Seigo Takahashi , Yoshiharu Maeno , Naoya Henmi
IPC分类号： H03D324
CPC分类号： H04L7/02 , H03L7/0812 , H04L7/0083 , H04L7/0337 , H04L7/0338 , H04L7/10
摘要： A bit synchronization circuit operates at high speed range as high as Gb/s or higher and can establish synchronization within 10 bits with rejecting jitter to permit accurate bit synchronization. The bit synchronization circuit thus generates a plurality of clocks having mutually different phases in synchronism with an input reference clock. A phase relationship between a plurality of clocks and an input data to be decided is discriminated by a phase comparator circuit. The clock having optimal phase relationship, namely clock having level transition timing having at a substantially center portion of mutually adjacent level transition timing of the input data, is determined by a phase determination circuit. An decision circuit and selector are provided for deciding input data at the level transition timing of the determined clock.
摘要翻译：位同步电路在高达Gb / s或更高的高速范围内工作，并且可以在10位内建立同步，同时抑制抖动以允许精确的位同步。因此，比特同步电路产生与输入参考时钟同步的具有相互不同相位的多个时钟。通过相位比较器电路鉴别多个时钟与待决定的输入数据之间的相位关系。具有最佳相位关系的时钟，即具有在输入数据的相互相邻电平转换定时的大致中心部分处的电平转换定时的时钟由相位确定电路确定。提供决定电路和选择器，用于在所确定的时钟的电平转换定时处决定输入数据。

68. 发明授权

US5205662A Method of feeding paper 失效
标题翻译：送纸方法
公开(公告)号：US5205662A
公开(公告)日：1993-04-27
申请号：US838389
申请日：1992-02-19
申请人： Noriyuki Kurokawa , Akio Tajima , Kazuaki Ikeda
发明人： Noriyuki Kurokawa , Akio Tajima , Kazuaki Ikeda
IPC分类号： B41J11/42 , B41J11/00 , B41J13/02 , B41J13/03 , B41J29/02
CPC分类号： B41J29/026 , B41J11/0005 , B41J11/005 , B41J13/03
摘要： Method of feeding a sheet of paper in a small-sized paper having small transport rollers mounted downstream of the print head. The feeding of the sheet is stopped temporarily when the sheet arrives at each of a number of positions located before the discharge rollers during a line feed operation. Under this interrupted condition, the print head is reciprocated once idly in a direction perpendicular to the direction in which the sheet is fed. Therefore, even if the front end portion of the sheet curls to a great extent, the curl is reduced by the idle movement of the head immediately before the front end of the sheet arrives between the discharge rollers. This ensures that the sheet is fed between the discharge rollers even if the diameter of the rollers is small.
摘要翻译：在安装在打印头下游的小型输送辊的小型纸中进给纸张的方法。当在进给操作期间片材到达位于排出辊之前的多个位置的每一个处时，暂时停止片材的进给。在这种中断状态下，打印头在垂直于纸张进给方向的空白方向一次往复运动。因此，即使纸张的前端部分在很大程度上卷曲，在纸张的前端在排出辊之前到达之前，头部的怠速运动也减小了卷曲。这确保了即使辊的直径小，也可以在排出辊之间输送片材。

69. 发明授权

US5193797A Paper feeding system and picking system used therefor 失效
标题翻译：纸张送料系统及其采用的系统
公开(公告)号：US5193797A
公开(公告)日：1993-03-16
申请号：US769096
申请日：1991-09-30
申请人： Hiroyuki Harada , Akio Tajima , Fumio Otsuka
发明人： Hiroyuki Harada , Akio Tajima , Fumio Otsuka
IPC分类号： B65H3/06
CPC分类号： B65H3/0669
摘要： A paper feeding system that eliminates a mechanism for interrupting driving force to picking rollers to lower the cost of the system and to secure the feeding of papers. Corner nails are supported in a manner displacable up and down on the both sides of the front end portion of a paper cassette and the front corner portions of papers stored within the paper cassette can be anchored by the corner nails. A projecting part of the corner nails abuts to a stopper to restrict its upper limit position. When the paper is not fed, the picking rollers are in an up position and are separated from the paper and the corner nails retain the paper at a certain height position engaging with the front corner portion of the paper. When the paper is fed, the picking rollers go down to a down position to press the paper against biasing force of a bias spring and the corner nails are separated from the stopper and contact with the front corner portion of the paper in the down position.
摘要翻译：一种送纸系统，其消除了用于中断采摘辊的驱动力以降低系统成本并确保纸张供给的机构。角钉在纸盒的前端部的两侧能够上下移动的方式被支撑，并且存储在纸盒内的纸张的前角部分可以被角钉固定。角钉的突出部分与止动器相接以限制其上限位置。当纸张不进纸时，拾纸辊处于向上位置并与纸分离，角钉将纸保持在与纸的前角部分啮合的一定高度位置。当送纸时，拾纸辊下降到向下位置，以克服偏压弹簧的偏压力按压纸张，角钉与止动器分离，并与纸张的前角部分处于向下位置。

70. 外观设计

USD332276S Ink ribbon cassette for an electronic computer 失效
公开(公告)号：USD332276S
公开(公告)日：1993-01-05
申请号：US570643
申请日：1990-08-21
申请人： Akio Tajima , Hiroyuki Harada
设计人： Akio Tajima , Hiroyuki Harada

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