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    Method of migrating processes between networks and network system thereof
    1.
    发明授权
    Method of migrating processes between networks and network system thereof 有权
    在网络和网络系统之间迁移过程的方法

    公开(公告)号：US07684417B2

    公开(公告)日：2010-03-23

    申请号：US10590355

    申请日：2005-02-25

    申请人： Tetsuo Imai ,  Soichiro Araki ,  Yoshihiko Suemura ,  Norihito Fujita ,  Tomoyoshi Sugawara

    发明人： Tetsuo Imai ,  Soichiro Araki ,  Yoshihiko Suemura ,  Norihito Fujita ,  Tomoyoshi Sugawara

    IPC分类号： H04L12/28

    CPC分类号： G06F11/2025 ,  G06F11/203 ,  G06F11/2048 ,  H04L41/22 ,  H04L43/0811 ,  H04L67/14 ,  H04L69/40

    摘要： To eliminate interruption of a service used by a user and reset of communication caused by switching of an operating server such as a process migration or the like. On receiving a session migration start request, server/network cooperation control means 2 issues an operating server-switching control start notification to an operating server switching control means 3 (step S702). On receiving the operating server switching control start notification, the operating server switching control means 3 switches an operating server. Next, on receiving an operating server switching control completion notification, the server/network cooperation control means 2 sends a connection destination target network-switching request to a connection control means 4 (step S707). The connection control means 4 switches the connection destination target network of the user corresponding to a user name whose connection destination target network is to be switched, from a target network including a main server to a switch destination target network including a backup server (step S708).

    摘要翻译： 为了消除用户使用的服务的中断和由诸如进程迁移等的操作服务器的切换引起的通信的重置。 在接收会话迁移启动请求时，服务器/网络协作控制装置2向操作服务器切换控制装置3发出操作服务器切换控制开始通知（步骤S702）。 在接收到操作服务器切换控制开始通知时，操作服务器切换控制单元3切换操作服务器。 接下来，在接收到操作服务器切换控制完成通知时，服务器/网络协作控制单元2向连接控制单元4发送连接目的地网络切换请求（步骤S707）。 连接控制装置4将包括主服务器的目标网络的与其连接目的地网络要切换的用户名相对应的用户的连接目的地网络切换到包括备用服务器的交换目的地目标网络（步骤S708 ）。

    Optical receiving circuit and optical communication device
    2.
    发明授权
    Optical receiving circuit and optical communication device 失效
    光接收电路和光通信设备

    公开(公告)号：US06760552B1

    公开(公告)日：2004-07-06

    申请号：US09532420

    申请日：2000-03-23

    申请人： Akio Tajima ,  Hiroaki Takahashi ,  Soichiro Araki ,  Naoya Henmi ,  Yoshihiko Suemura ,  Yoshiharu Maeno ,  Seigo Takahashi

    发明人： Akio Tajima ,  Hiroaki Takahashi ,  Soichiro Araki ,  Naoya Henmi ,  Yoshihiko Suemura ,  Yoshiharu Maeno ,  Seigo Takahashi

    IPC分类号： H04B1006

    CPC分类号： H04B10/6931

    摘要： An optical receiving circuit 1 is composed of a preamplifier circuit 2, an output differential amplifier 3 and a mean value holding circuit 4. The optical receiving circuit 1 is connected to a photodetector 5 for receiving an input optical signal and outputting current. For the preamplifier circuit 2, a transimpedance type circuit may also be used. The preamplifier circuit 2 comprises a feedback resistor 21 and a resistor for detecting output voltage 22, the transimpedance gain is 55 dB &OHgr; and 3 dB bandwidth when the photodetector 5 the capacity of which is 0.2 pF is connected to its output is 8 GHz. The output differential amplifier 3 discriminates and regenerates data by regulating reference voltage Vref between the high level and the low level of the amplitude of an input signal. The mean value holding circuit 4 includes a sample-hold circuit 41 and capacity 42 for holding the mean value of voltage output from the preamplifier circuit 2. As a CR time constant based upon the capacity 42 and the resistor for detection 22 is 1 ns., the mean value level of a received signal can be detected in approximately one byte of the data of 10 Gb/s. The sample-hold circuit 41 samples the detected mean value level according to a sampling pulse from an external device and holds it. The output of the sample-hold circuit 41 is used for the reference voltage of the differential amplifier 3.

    摘要翻译： 光接收电路1由前置放大电路2，输出差分放大器3和平均值保持电路4组成。光接收电路1连接到用于接收输入光信号并输出​​电流的光电检测器5。 对于前置放大器电路2，也可以使用跨阻型电路。 前置放大器电路2包括反馈电阻器21和用于检测输出电压22的电阻器，当其电容为0.2pF的光电检测器5连接到其输出端时，跨阻增益为55dBΩ和3dB带宽为8GHz。 输出差分放大器3通过调节输入信号的幅度的高电平和低电平之间的参考电压Vref来识别和再生数据。 平均值保持电路4包括采样保持电路41和用于保持从前置放大器电路2输出的电压的平均值的电容42.由于基于电容42和检测电阻22的CR时间常数为1ns。 可以在10Gb / s的数据的大约一个字节中检测接收信号的平均值电平。 采样保持电路41根据来自外部设备的采样脉冲对检测到的平均值电平进行采样并保持。 采样保持电路41的输出用于差分放大器3的参考电压。

    Optical network
    3.
    发明授权
    Optical network 失效
    光网络

    公开(公告)号：US06429955B1

    公开(公告)日：2002-08-06

    申请号：US09218102

    申请日：1998-12-22

    申请人： Yoshihiko Suemura ,  Soichiro Araki ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    发明人： Yoshihiko Suemura ,  Soichiro Araki ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    IPC分类号： H04J1402

    CPC分类号： H04Q11/0001

    摘要： Disclosed is an optical network which has: wavelength tunable optical transmitters of number MN, where N is an integer of two or more, each of which outputs an optical signal with arbitrary one of M wavelengths &lgr;1, &lgr;2, . . . , &lgr;M, where M is an integer of two or more, that are different from one another; a MN×N optical switch whose input ports are connected to the respective wavelength tunable optical transmitters of number MN, and which allows optical signals input to different input ports to be output form its same output port; 1×M optical wavelength demultiplexers of number N which output demultiplexing optical signal with wavelengths &lgr;1, &lgr;2, . . . , &lgr;M input from output ports of the MN×N optical switch into each wavelength; and optical receivers of number MN which receive optical signals input from the 1×M optical wavelength demultiplexers of number N.

    摘要翻译： 公开了一种光网络，其具有：号MN的波长可调光发射机，其中N是两个或更多个的整数，每个都输出具有M个波长lambd1，lambd2的任意一个的光信号。 。 。 ，lambdM，其中M是两个或更多个彼此不同的整数; 一个MNxN光开关，其输入端口连接到MN号的各波长可调光发射机，并允许输入到不同输入端口的光信号从其相同的输出端口输出; 数字N的1xM光学波长解复用器，其输出具有波长lambd1，lambd2的解复用光信号。 。 。 ，将MNxN光开关的输出端口的lambdM输入到每个波长; 数字MN的光接收器接收从数字N的1MM光波分复用器输入的光信号。

    Optical packet exchange system and optical switch
    7.
    发明授权
    Optical packet exchange system and optical switch 失效
    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。

    Bit synchronization circuit
    9.
    发明授权
    Bit synchronization circuit 有权
    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。

    Link property setting method, route calculating method and system using the same
    10.
    发明授权
    Link property setting method, route calculating method and system using the same 失效
    链路属性设置方法，路由计算方法和使用该方法的系统

    公开(公告)号：US07706284B2

    公开(公告)日：2010-04-27

    申请号：US11578418

    申请日：2005-04-14

    申请人： Yoshihiko Suemura

    发明人： Yoshihiko Suemura

    IPC分类号： H04L12/26

    CPC分类号： H04L45/00 ,  H04L45/28

    摘要： A method of setting shared risk link group identification information (SRLG ID) which is one of link properties employed for calculating a route for a path in a communications network including nodes and links for interconnecting the nodes, and indicates a link group which shares resources, comprises the step of assigning a number of SRLG IDs to the link group in accordance with a failure rate of resources shared by that link group. A route calculating method for calculating routes for a working path and a standby path comprises the step of calculating the routes such that a minimum number of SRLG IDs duplicate between all links on the route of the working path and all links on the route of the standby path.

    摘要翻译： 一种设置共享风险链路组识别信息（SRLG ID）的方法，该共享风险链路组识别信息是用于计算包括用于互连节点的节点和链路的通信网络中的路径的路由的链路属性之一，并且指示共享资源的链路组， 包括根据该链路组共享的资源的故障率向链路组分配多个SRLG ID的步骤。 用于计算工作路径和备用路径的路由的路由计算方法包括以下步骤：计算路由，使得最小数量的SRLG ID在工作路径的路由上的所有链路与备用路由上的所有链路之间重复 路径。