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    • 2. 发明授权
    • Multidrop control network commonly used for carrying network management
signals and topology reconfiguration signals
    • 多点控制网络通常用于承载网络管理信号和拓扑重构信号
    • US5130974A
    • 1992-07-14
    • US501804
    • 1990-03-30
    • Hajime KawamuraKeisuke Kuroyanagi
    • Hajime KawamuraKeisuke Kuroyanagi
    • H04L29/14H04J3/08H04L12/24
    • H04L41/0816H04J3/085H04L41/0677
    • A data communication system comprises a network management center and switching nodes which are interconnected by regular and spare routes. Each of the regular and spare routes comprises data channels and a control chnanel, the data channels of the regular routes forming a data network for carrying signals to and from user terminals and the control channel of each regular or spare route is connected to the control channels of other regular or spare routes to form a control network of multidrop structure for carrying a network management signal from the center to the nodes as well as network response signals from the nodes to the center. Each of the nodes transmits a request signal through the control network in the event of a line fault in the transmission lines to request permission to establish a new regular route to an adjacent node and transmits a grant signal through the control network in response to receipt of a request signal from an adjacent node indicating that the request is granted if an alternate route is available. The control network is dynamically reconfigured in accordance with the presence and absence of the request signal and the grant signal received from adjacent nodes.
    • 数据通信系统包括通过常规和备用路由互连的网络管理中心和交换节点。 常规路由和备用路由中的每一条包括数据信道和控制信道,形成用于向用户终端和从用户终端传送信号的数据网络的常规路由的数据信道和每个常规或备用路由的控制信道连接到控制信道 形成其他常规或备用路由,形成多中心结构的控制网络,用于承载中心到节点的网络管理信号,以及从节点到中心的网络响应信号。 每个节点在传输线中发生线路故障的情况下通过控制网络发送请求信号,以请求建立到相邻节点的新规则路由的许可,并响应于接收到的信息而通过控制网络发送授权信号 来自相邻节点的请求信号,指示如果备用路由可用则该请求被授权。 控制网络根据请求信号的存在和不存在以及从相邻节点接收到的授权信号进行动态重新配置。
    • 3. 发明授权
    • Path routing system for communication network
    • 通信网路径路由系统
    • US5343466A
    • 1994-08-30
    • US20332
    • 1993-02-19
    • Hajime Kawamura
    • Hajime Kawamura
    • H04L12/725H04L12/751H04L12/56
    • H04L45/00H04L45/26
    • In a path routing system for a communication network having a plurality of nodes and a plurality of transmission lines, an originate node transmits a routing message with a transmission line attribute designation to a bypass node for establishing a path between the originate node and a terminal node. A repeater node searches for a transmission line having the same attribute as the transmission line attribute designation upon receipt of the routing message with the transmission line attribute designation, and transmits the message to an adjacent node through the searched transmission line. A path between the originate node and the terminal node is autonomously selected to pass through transmission lines having the desired attribute by repeatably searching the transmission lines and transmitting the message between nodes disposed between the originate node and the terminal node.
    • 在具有多个节点和多个传输线的通信网络的路径路由系统中,起始节点向旁路节点发送具有传输线属性指定的路由消息,用于建立起始节点和终端节点之间的路径 。 中继器节点在接收到具有传输线属性指定的路由消息时,搜索具有与传输线属性指定相同属性的传输线,并通过所搜索的传输线将消息发送到相邻节点。 原始节点和终端节点之间的路径被自主选择,以通过可重复地搜索传输线并在布置在起始节点和终端节点之间的节点之间传送消息来通过具有期望属性的传输线。
    • 6. 发明授权
    • Method for deciding the feasibility of logic circuit prior to performing
logic synthesis
    • 在执行逻辑合成之前决定逻辑电路的可行性的方法
    • US5801956A
    • 1998-09-01
    • US667334
    • 1996-06-20
    • Hajime KawamuraTakeharu NemotoTakuo Nakaki
    • Hajime KawamuraTakeharu NemotoTakuo Nakaki
    • G06F17/50
    • G06F17/5022G06F17/5045
    • A logic circuit design procedure comprises a step of deciding the feasibility of hardware after HDL description and functional verification, and a step of performing logic synthesis of the HDL description which has been determined to be feasible. The feasibility decision step comprises at least a decision on the possibility of spike transfer and a decision on oscillation. The spike transfer check step determines whether at least one of a clock signal and a reset signal of any sequential circuit is output from a combinational circuit. The oscillation check step determines whether an output signal of any combinational circuit is recursively input thereto without passing through a sequential circuit. Only the HDL description which passes the feasibility test is allowed to enter the logic synthesis stage.
    • 逻辑电路设计程序包括在HDL描述和功能验证之后决定硬件的可行性的步骤,以及执行已被确定为可行的HDL描述的逻辑合成步骤。 可行性决定步骤至少包括关于峰值转移和振荡决定的可能性的决定。 尖峰传输检查步骤确定是否从组合电路输出任何时序电路的时钟信号和复位信号中的至少一个。 振荡检查步骤确定任何组合电路的输出信号是否被递归地输入到其中,而不经过顺序电路。 通过可行性测试的HDL描述只允许进入逻辑合成阶段。
    • 7. 发明授权
    • Multi-layer digital circuit board with a test pattern section
    • 具有测试图案部分的多层数字电路板
    • US5500862A
    • 1996-03-19
    • US331174
    • 1994-10-28
    • Hajime Kawamura
    • Hajime Kawamura
    • G01R31/28G01R31/3185H05K1/02H05K1/18H04B17/00
    • G01R31/3185H05K1/0268H05K1/181
    • In a digital circuit board comprising a circuit mounting section and a test pattern section, the circuit mounting section has a circuit upper face on which the edge connector and an LSI circuit are mounted. The circuit mounting section has a circuit back face opposite to the circuit upper face. The circuit mounting section has a plurality of terminal through holes, the connector terminals including connector test terminals for use in testing the LSI circuit, and the LSI terminals including LSI test terminals for use in testing the LSI circuit. The terminal through holes have ends connected to the connector test terminals and to the LSI test terminals and have another ends which reach to the circuit back face. The test pattern section has a test upper face which is in contact with the circuit back face and on which test conductive patterns are formed. The test conductive patterns are for use in testing the LSI circuit and connecting the LSI test terminals with the connector test terminals via the terminal through holes. A plurality of LSI circuits may be mounted on the digital circuit board. In the event, the LSI circuit may be both a boundary scan LSI with a boundary scan test logic circuit and an unboundary scan LSI which does not contain the boundary scan test logic circuit.
    • 在包括电路安装部分和测试图形部分的数字电路板中,电路安装部分具有安装边缘连接器和LSI电路的电路上表面。 电路安装部具有与电路上表面相对的电路背面。 电路安装部分具有多个端子通孔,连接器端子包括用于测试LSI电路的连接器测试端子,以及包括用于测试LSI电路的LSI测试端子的LSI端子。 端子通孔的端部连接到连接器测试端子和LSI测试端子,并且具有到达电路背面的另一端。 测试图形部分具有与电路背面接触并且在其上形成测试导电图案的测试上表面。 测试导电图案用于测试LSI电路,并通过端子通孔将LSI测试端子与连接器测试端子连接。 多个LSI电路可以安装在数字电路板上。 在这种情况下,LSI电路可以是具有边界扫描测试逻辑电路的边界扫描LSI和不包含边界扫描测试逻辑电路的无边界扫描LSI。