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    • 2. 发明授权
    • Short-distance wireless communication system and method
    • 短距离无线通信系统及方法
    • US09282574B2
    • 2016-03-08
    • US13393316
    • 2010-08-23
    • Masahiro Kuroda
    • Masahiro Kuroda
    • H04B7/00H04W74/06H04W74/08H04W84/18H04J3/06
    • H04W74/06H04J3/0652H04W74/0891H04W84/18
    • In particular, even if sensors have their respective different timer precisions, the number of occasions when the sensors wait for data can be minimized, thereby reducing the output consumptions on the sensor sides. A coordinator (3) allocates, based on information previously received from sensors (2), the sensors to respective slots, which constitute a super-frame, in a time sequence order and then notifies, to the sensors (2), the respective slots to which the sensors are allocated. When each of the sensors (2) transmits data to the coordinator (3), the sensor makes a synchronization request at the timing of the notified slot without receiving any beacons from the coordinator.
    • 特别是,即使传感器具有各自不同的计时精度,传感器等待数据的场合的数量也可以最小化,从而减少传感器侧的输出消耗。 协调器(3)基于先前从传感器(2)接收到的信息,将传感器按时间顺序分配给构成超帧的各个时隙,然后向传感器(2)通知各个时隙 分配传感器。 当每个传感器(2)向协调器(3)发送数据时,传感器在所通知的时隙的定时处进行同步请求,而不从协调器接收任何信标。
    • 3. 发明授权
    • Random error signal generator
    • 随机误差信号发生器
    • US08095842B2
    • 2012-01-10
    • US12510423
    • 2009-07-28
    • Takashi FuruyaMasahiro KurodaHiroshi Shimotahira
    • Takashi FuruyaMasahiro KurodaHiroshi Shimotahira
    • G01R31/3183
    • G01R31/318371G01R31/31917
    • In a random error signal generator, an M-sequence generation circuit outputs, in parallel, pieces of bit data stored in each register, a first generation circuit sequentially outputs first reference values C which are changed by a predetermined value in response to clocks, a second generation circuit outputs a second reference value D which is shifted from the first reference value C by a range value E which is determined depending on an error rate p. A comparison and determination unit outputs random error signals to be error bits when a numeric value A of the bit data output exists between the first and second reference values C, D. The random error signal has the error rate p, the number of times of error occurrences follows Poisson distribution, and a distribution of adjacent error occurrence intervals follows a geometric distribution.
    • 在随机误差信号发生器中,M序列产生电路并行地输出存储在每个寄存器中的位数据,第一生成电路顺序地输出响应于时钟改变预定值的第一参考值C, 第二产生电路输出从第一参考值C偏移根据错误率p确定的范围值E的第二参考值D. 当在第一和第二参考值C,D之间存在位数据输出的数值A时,比较和确定单元输出随机误差信号为误差位。随机误差信号具有误差率p, 错误发生遵循泊松分布,相邻误差发生间隔的分布遵循几何分布。
    • 5. 发明申请
    • WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD
    • 无线通信系统和无线通信方法
    • US20090074187A1
    • 2009-03-19
    • US12067079
    • 2006-09-15
    • Daisuke InoueMasahiro KurodaKentaro Ishizu
    • Daisuke InoueMasahiro KurodaKentaro Ishizu
    • H04L9/32G06F21/20G06F17/00H04K1/00
    • H04L9/3242H04L9/0891H04L29/12264H04L29/12839H04L61/2046H04L61/6022H04L63/1458H04L2209/80H04W8/26H04W12/04H04W12/12
    • The present invention provides a technology of effectively avoiding tracing on a terminal performed with an identification number being a target and DoS attack without making any significant changes to a communication system.In the wireless communication system of the present invention, under a control of a control communication processing portion 113 of an access point, a hash function arithmetic operation processing portion 112 generates a third identification number to be updated using a current identification number, hash key and random number for any wireless communication terminal, a control communication processing portion 113 sends an update instruction signal containing the random number to the wireless communication terminal and updates the current identification number stored in the identification number storage portion 121 to a second identification number. When the wireless communication terminal receives an update instruction signal, the current identification number is updated to the second identification number and the hash function arithmetic operation processing portion generates a third identification number using the current identification number, hash key and random number stored in the self number storage portion.
    • 本发明提供了一种技术,其有效地避免了以标识号为目标和DoS攻击执行的终端上的跟踪,而不对通信系统进行任何显着的改变。 在本发明的无线通信系统中,在接入点的控制通信处理部分113的控制下,散列函数算术运算处理部分112使用当前标识号码,散列密钥和 任意无线通信终端的随机数,控制通信处理部113向无线通信终端发送含有随机数的更新指示信号,将存储在识别号码存储部121中的当前识别号更新为第二识别号。 当无线通信终端接收到更新指示信号时,将当前识别号码更新为第二识别号,并且散列函数算术运算处理部分使用存储在自身中的当前识别号,散列密钥和随机数来生成第三识别号码 号码存储部分。
    • 7. 发明申请
    • Communication Method and Communication System Using Decentralized Key Management Scheme
    • 使用分散密钥管理方案的通信方法与通信系统
    • US20080165974A1
    • 2008-07-10
    • US11628692
    • 2004-12-08
    • Daisuke InoueMasahiro Kuroda
    • Daisuke InoueMasahiro Kuroda
    • H04L9/08H04L9/14
    • H04L9/0891H04L9/0836H04L2209/80
    • A decentralized key management scheme that implements key management of a tree structure comprised of only group members without using a key management server is proposed, and communication method and system that can contribute to secure group communications is provided. Each member constituting a group updates tree structure data of the entire group when a new member joins, respectively 70, and selects a captain in each subtree 71. Rather than the key management server, the captain generates a new key and shares it with other captains or the joining member 72, and distributes the new key to the members of the subtree 73, thereby enabling all the group members to update to the new key. A captain is also selected when a member leaves, and sharing and distribution of a new key by the captain is performed.
    • 提出了一种分散密钥管理方案,实现了仅由组成员组成的树结构的密钥管理,而不使用密钥管理服务器,并提供了可以有助于安全组通信的通信方法和系统。 构成组的每个成员分别在新成员加入时更新整个组的树结构数据,并分别选择每个子树71中的队长。 船长不是密钥管理服务器,而是生成一个新密钥,并与其他船长或加入成员72共享,并将新密钥分发给子树73的成员,从而使所有的群组成员更新到新密钥 。 一名成员离开时也选择了一名队长,并且执行了船长共享和分配新的钥匙。