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    • 11. 发明申请
    • IP packet communication apparatus
    • IP分组通信装置
    • US20050185577A1
    • 2005-08-25
    • US11115125
    • 2005-04-27
    • Kenichi SakamotoNoboru EndoToshiki SugawaraKoji WakayamaKazuyoshi Hoshino
    • Kenichi SakamotoNoboru EndoToshiki SugawaraKoji WakayamaKazuyoshi Hoshino
    • H04L12/56H04J14/02H04L12/26
    • H04J14/0295H04J14/0227H04J14/0241H04J14/0278H04J14/0283H04J14/029H04J14/0294H04J14/0297H04L43/00H04L43/0829H04L43/0847H04L43/10H04L43/16
    • In an IP packet communication apparatus, an operation and maintenance function capable of monitoring a transmission path is provided to a layer used to process a packet, which corresponds to an upper layer of an optical network. As one method for applying the operation and maintenance function to the packet layer, in the case of IP over PPP over WDM, an operation/maintenance frame is defined to a PPP frame so as to realize the operation/maintenance function of a PPP connection. In the case that a plurality of connections are multiplexed on the same transmission path, a maintenance frame is conducted in order to operate/manage these connections by being grouped, so that a fault occurring in the optical network is monitored. As another method for applying the operation and maintenance function to the packet layer, an operation/maintenance frame is defined to an IP packet so as to realize an operation and maintenance function of an IP flow. Also, since a plurality of flows are multiplexed on the same transmission path, a management packet is defined to operate/manage these flows to be grouped, so that a fault occurring the in the optical network is monitored.
    • 在IP分组通信装置中,向用于处理对应于光网络的上层的分组的层提供能够监视传输路径的操作和维护功能。 作为对分组层应用操作和维护功能的一种方法,在通过WDM通过PPP的IP的情况下,将操作/维护帧定义为PPP帧,以实现PPP连接的操作/维护功能。 在多个连接被复用在同一传输路径上的情况下,进行维护帧以通过分组来操作/管理这些连接,从而监视在光网络中发生的故障。 作为对分组层应用操作和维护功能的另一种方法,将IP分组定义为操作/维护帧,以实现IP流的操作和维护功能。 此外,由于多个流在同一传输路径上多路复用,所以管理分组被定义为对这些流进行分组操作/管理,从而监视在光网络中发生的故障。
    • 15. 发明授权
    • Handover method in mobile communication system
    • 移动通信系统中的切换方法
    • US06754495B2
    • 2004-06-22
    • US09855102
    • 2001-05-14
    • Tsutomu KusakiKenichi SakamotoMasaru MurakamiTakashi Yokoyama
    • Tsutomu KusakiKenichi SakamotoMasaru MurakamiTakashi Yokoyama
    • H04Q720
    • H04W36/18H04W36/02H04W36/26H04W36/30
    • In a mobile communication system having an ATM-processed transfer path, a non-instantaneous interrupt handover can be realized. In a mobile communication network including an ATM-processed transfer path, when a mobile station is moved between cells during communication, frames are received to be identified by a mobile switching center. The frames contain the same data received from both base stations covering the cell range at asynchronous timing different from each other. A selection is made of header information with the lowest error rate from the header information of these frames. The frames are connected at instructed timing. Also, the frames to be transmitted to a plurality of base stations are duplicated, and then transmission timing is specified from these header information. These duplicated frames are transmitted at the specified transmission timing, so that the non-instantaneous interrupt handover is carried out.
    • 在具有ATM处理传输路径的移动通信系统中,可以实现非瞬时中断切换。 在包括ATM处理的传输路径的移动通信网络中,当移动站在通信期间在小区之间移动时,帧被接收以被移动交换中心识别。 这些帧包含从两个基站接收到的相同数据,这两个基站在异步定时不同的情况下覆盖小区范围。 从这些帧的标题信息中选择具有最低错误率的报头信息。 帧在指定的时间连接。 此外,要发送到多个基站的帧被复制,然后从这些头信息指定发送定时。 这些复制帧在指定的发送定时被发送,从而执行非瞬时中断切换。
    • 16. 发明授权
    • Head supporting device and disk drive using the same
    • 头支持装置和磁盘驱动器使用相同
    • US06751064B2
    • 2004-06-15
    • US10075565
    • 2002-02-13
    • Hideki KuwajimaKenichi SakamotoMakoto Miyamoto
    • Hideki KuwajimaKenichi SakamotoMakoto Miyamoto
    • G11B5596
    • G11B5/4806G11B5/4826G11B11/1055
    • A head supporting device comprises a support arm and a head mounted to an underside surface at one end of the support arm. The support arm is disposed in a rotatable manner about a bearing unit in a radial direction of a recording medium as well as a perpendicular direction with respect to a writing surface of the recording medium, and the support arm is provided with resilient means for imposing upon itself with a thrusting force in a direction toward the recording medium. Because of this structure, a portion serving as the support arm can be formed with a material of high rigidity, the thrusting force of the resilient means upon the slider can be set freely as desired, and its resonance frequency can be increased, thereby providing the head supporting device with an extremely high resistance to shock, and high responsivity with capability of making a high speed access.
    • 头支撑装置包括支撑臂和安装到支撑臂的一端处的下侧表面的头部。 支撑臂以可旋转的方式围绕记录介质的径向方向围绕轴承单元以及相对于记录介质的书写面的垂直方向设置,并且支撑臂设置有弹性装置,用于施加 本身在朝向记录介质的方向上具有推力。 由于这种结构,作为支撑臂的部分可以由刚性高的材料形成,弹性装置在滑块上的推力可根据需要自由设定,并且可以提高其共振频率,从而提供 头部支撑装置,具有极高的抗冲击能力,并具有高响应能力,具有高速通道的能力。
    • 17. 发明授权
    • Handover method in mobile communication system
    • 移动通信系统中的切换方法
    • US06259920B1
    • 2001-07-10
    • US09603008
    • 2000-06-26
    • Tsutomu KusakiKenichi SakamotoMasaru MurakamiTakashi Yokoyama
    • Tsutomu KusakiKenichi SakamotoMasaru MurakamiTakashi Yokoyama
    • H04Q720
    • H04W36/18H04W36/02H04W36/26H04W36/30
    • In a mobile communication system having an ATM-processed transfer path, a non-instantaneous interrupt handover can be realized. In a mobile communication network including an ATM-processed transfer path, when a mobile station is moved between cells during communication, frames are received to be identified by a mobile switching center. The frames contain the same data received from both base stations covering the cell range at asynchronous timing different from each other. A selection is made of header information with the lowest error rate from the header information of these frames. The frames are connected at instructed timing. Also, the frames to be transmitted to a plurality of base stations are duplicated, and then transmission timing is specified from these header information. These duplicated frames are transmitted at the specified transmission timing, so that the non-instantaneous interrupt handover is carried out.
    • 在具有ATM处理传输路径的移动通信系统中,可以实现非瞬时中断切换。 在包括ATM处理的传输路径的移动通信网络中,当移动站在通信期间在小区之间移动时,帧被接收以被移动交换中心识别。 这些帧包含从两个基站接收到的相同数据,这两个基站在异步定时不同的情况下覆盖小区范围。 从这些帧的标题信息中选择具有最低错误率的报头信息。 帧在指定的时间连接。 此外,要发送到多个基站的帧被复制,然后从这些头信息指定发送定时。 这些复制帧在指定的发送定时被发送,从而执行非瞬时中断切换。
    • 18. 发明授权
    • Voice coil motor
    • 音圈电机
    • US06225712B1
    • 2001-05-01
    • US09447736
    • 1999-11-23
    • Makoto MiyamotoHideki KuwajimaKenichi SakamotoHiromi KitaKaoru Matsuoka
    • Makoto MiyamotoHideki KuwajimaKenichi SakamotoHiromi KitaKaoru Matsuoka
    • H02K3300
    • H02K41/0358
    • A voice coil motor capable of quickly and precisely positioning a magnetic head with high precision is provided with a bearing rotatably supporting a head carriage without being influenced by a radial load. Two coils having radial sections contributing to generate a torque are provided to be rotatable in a magnetic space formed by a permanent magnet and a pair of yokes, and are layered along a central rotating axis in such a manner that an extension angle of the radial sections of one coil differs in direction from that of the radial sections of the other coil. When electric current flows, no radial load works, and a resultant force generated in these coils can be a couple of forces in the direction vertical to the movement direction of the magnetic head, so that the magnetic head can be quickly positioned with high precision, realizing a small magnetic disk device.
    • 能够以高精度快速且精确地定位磁头的音圈电机设置有可旋转地支撑磁头托架的轴承,而不受径向载荷的影响。 具有有助于产生转矩的径向部分的两个线圈被提供为可在由永磁体和一对轭形成的磁空间中旋转,并且沿着中心旋转轴线以这样的方式分层,使得径向部分 一个线圈的方向与另一个线圈的径向部分的方向不同。 当电流流动时,不产生径向载荷,并且在这些线圈中产生的合力可以在垂直于磁头移动方向的方向上成为一对力,使得磁头可以高精度地快速定位, 实现小型磁盘装置。
    • 20. 发明授权
    • Communication system
    • 通讯系统
    • US06178165B1
    • 2001-01-23
    • US09411655
    • 1999-10-04
    • Kenichi SakamotoTsutomu KusakiMasaru MurakamiTakashi Zokoyama
    • Kenichi SakamotoTsutomu KusakiMasaru MurakamiTakashi Zokoyama
    • H04Q700
    • H04B7/022H04W36/18
    • A communication system includes a control unit, a switch and a diversity hand-over processing unit connected to the control unit and the switch for receiving, both a first communication signal received from a radio base station which outputs the hand-over instruction, and a second communication signal which receives it from another radio base station to which the communication signal will be hand-over to output one of the first and second communication signals to the associated interface circuit, and for transmitting the communication signal received through the radio base station from the mobile station on the reception side for communication to both the interface circuit associated with the radio base station as a source of hand-over and the interface circuit associated with the radio base station as a destination of hand-over. Thus, during the hand-over, the diversity hand-over processing unit transmits the communication signal from the mobile station on the reception side for communication to both the radio base station as a source of hand-over and the radio base station as a destination of hand-over so that the communication is established between the mobile station on the transmission side for communication and the mobile station as a destination of hand-over and on the reception side for communication.
    • 一种通信系统,包括控制单元,开关和分配移交处理单元,连接到控制单元和开关,用于接收从输出切换指令的无线电基站接收的第一通信信号和 第二通信信号,其从另一个无线电基站接收通信信号将被切换到的第二和第二通信信号,以将第一和第二通信信号中的一个输出到相关联的接口电路,并且将通过无线电基站接收的通信信号从 接收侧的移动台用于与无线基站相关联的接口电路作为切换源,以及与无线基站相关联的接口电路作为切换目的地进行通信。 因此,在切换过程中,分集处理单元将来自接收侧的移动台的通信信号作为切换的来源发送到作为切换的来源的无线基站和作为目的地的无线基站 使得在用于通信的发送侧的移动台和作为切换的目的地的移动台之间以及在用于通信的接收侧上建立通信。