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    • 1. 发明授权
    • Buffer circuit
    • 缓冲电路
    • US06703864B2
    • 2004-03-09
    • US09728103
    • 2000-12-01
    • Junichi TakeuchiFumio Nakano
    • Junichi TakeuchiFumio Nakano
    • H03K19094
    • H03K19/018528
    • An output buffer circuit of a Pseudo Emitter Coupled Logic (PECL) uses a common level which is generated by a resistance division so that the common level is unstable to follow to a gradient of power source variation and an output signal level of the output buffer circuit is apt to be off from a level of the PECL. An output buffer circuit of PECL according to the present invention comprises: a first output terminal; a second output terminal; a first resistor connected between the first output terminal and a output terminal of a common level generator; a second resister connected between the second output terminal and the output terminal of the common level generator; and a driver circuit which makes a current from the first output terminal to the second output terminal through the first resistor and second resistor when a first input signal and a second input signal complementary to the first input signal result a first data, and makes a current from the second output terminal to the first output terminal through the second resistor and the first resistor when the first input signal and the second input signal result a second data; a common level which follows its fluctuation to that of power source is supplied to the connecting point of the first and second resistors.
    • 伪发射极耦合逻辑(PECL)的输出缓冲电路使用由电阻分割产生的公共电平,使得公共电平不稳定以跟随电源变化的梯度和输出缓冲电路的输出信号电平 容易脱离PECL的水平。 根据本发明的PECL的输出缓冲电路包括:第一输出端; 第二输出端子; 连接在所述第一输出端子和公共电平发生器的输出端子之间的第一电阻器; 连接在第二输出端子和公共电平发生器的输出端子之间的第二电阻器; 以及驱动电路,当与所述第一输入信号互补的第一输入信号和第二输入信号产生第一数据时,通过所述第一电阻器和所述第二电阻器将从所述第一输出端子流到所述第二输出端子的电流产生电流 当第一输入信号和第二输入信号产生第二数据时,通过第二电阻器和第一电阻器从第二输出端子到第一输出端子; 将其波动与电源的波动的共同电平提供给第一和第二电阻器的连接点。
    • 9. 发明授权
    • Anomaly detection method and system and maintenance method and system
    • 异常检测方法及系统及维护方法及系统
    • US08611228B2
    • 2013-12-17
    • US11914156
    • 2006-06-02
    • Yasuhiko MatsunagaJunichi TakeuchiTakayuki Nakata
    • Yasuhiko MatsunagaJunichi TakeuchiTakayuki Nakata
    • H04L12/26
    • H04L1/0019
    • A network management apparatus in a mobile communication network holds a communication quality index in a normal operation and periodically receives input of a communication quality measurement result from a radio base station control apparatus. When a connection failure count f with respect to a connection request count a of each radio cell is obtained as a measurement result, letting p0 be the call loss rate in the normal operation, an upper probability B of a binomial distribution representing the connection failure count becomes larger than f is obtained (step 524). The negative logarithm of the upper probability B is obtained as the score of the degree of abnormality (step 525). Anomaly of communication is detected when the score of the degree of abnormality exceeds a predetermined threshold value (steps 526 and 527). After that, maintenance control is executed in accordance with the calculated score of the degree of abnormality, thereby appropriately avoiding a fault of the communication system. This allows to calculate the degree of abnormality from the measurement result of the communication quality index in the mobile communication network in consideration of the statistical reliability and execute maintenance corresponding to the degree of abnormality.
    • 移动通信网络中的网络管理装置在正常操作中保持通信质量指标,并且从无线基站控制装置周期性地接收通信质量测量结果的输入。 当获得关于每个无线电小区的连接请求计数a的连接失败计数f作为测量结果时,将p0作为正常操作中的呼叫损失率,表示连接故障计数的二项式分布的较高概率B 变得大于f(步骤524)。 获得上位概率B的负对数作为异常程度的得分(步骤525)。 当异常程度的分数超过预定阈值时,检测到通信异常(步骤526和527)。 之后,根据异常程度的计算得出执行维护控制,从而适当地避免通信系统的故障。 考虑到统计可靠性并根据异常程度执行维护,可以从移动通信网络中的通信质量指标的测量结果计算出异常程度。
    • 10. 发明申请
    • NETWORK DEVICE OF TRANSFER SWITCHING TYPE AND FRAME TRANSFER METHOD
    • 传输切换类型和帧传输方法的网络设备
    • US20110026538A1
    • 2011-02-03
    • US12934830
    • 2009-03-26
    • Junichi TakeuchiNaoto IgaHideki GotoShinichi Iiyama
    • Junichi TakeuchiNaoto IgaHideki GotoShinichi Iiyama
    • H04L12/56
    • H04L49/351H04L49/251
    • A network device of is a network device that transfers frames by repeating, in a constant cycle, a reserved transfer interval and a free transfer interval. The network device includes a transmission port, a cycle timer, a mode switching control unit that monitors a transfer state of the transmission port and selects a store-and-forward system when the transmission port is in the transfer process and selects a cut-through system when the transmission port is not in the transfer process, and a transfer prohibition control unit that selects the cut-through system as a transfer system when a non-reserved frame is transmitted and switches a transfer method of the non-reserved frame to the store-and-forward system when a reserved transfer interval is established, with reference to the cycle timer.
    • 网络设备是通过以恒定周期重复保留的传送间隔和自由传送间隔来​​传送帧的网络设备。 网络设备包括传输端口,周期定时器,模式切换控制单元,其监视传输端口的传输状态,并且当传输端口处于传输过程中时选择存储转发系统并选择切换 系统,以及传输禁止控制单元,当发送非保留帧时,选择切换系统作为传送系统,并将非保留帧的传送方法切换到 参考周期定时器建立保留传输间隔时的存储转发系统。