Switching system
    2.
    发明授权
    Switching system 失效
    开关系统

    公开(公告)号:US5184346A

    公开(公告)日:1993-02-02

    申请号:US526381

    申请日:1990-05-21

    IPC分类号: H04L12/931

    CPC分类号: H04L12/5601 H04L2012/5672

    摘要: A switching system exchanges communication information as fixed length cells between a plurality of incoming and outgoing highways. The fixed length cells each have a plurality of data portions with one data portion designated as a header portion for containing switching information. An address generating circuit generates read addresses and write addresses in response to the header portion of each cell and a control circuit. The plurality of cells from the incoming highways are simultaneously rotated in a rotation matrix with each of the cell's data portions rotated to a unique internal path. The data portions are then transmitted to identical write addresses in a plurality of memories via delay circuitry. The write addresses are transmitted through shift registers to the plurality of memories to allow the data portions of a single cell to occupy identical addresses within a plurality of memories. The control circuitry determines the correct outgoing highway for each cell based upon information contained within the header portion of each cell or a routing table. The data portions are then read out of read addresses in the plurality of memories and rotated by another rotation matrix. The rotated data portions reform the fixed length cell along a determined outgoing highway.

    摘要翻译: 交换系统将通信信息交换为多个入站和出站高速公路之间的固定长度小区。 固定长度单元各自具有多个数据部分,其中一个数据部分被指定为用于包含切换信息的报头部分。 地址产生电路响应每个单元的头部部分和控制电路产生读地址和写地址。 来自输入高速公路的多个单元同时以旋转矩阵旋转,其中每个单元的数据部分旋转到独特的内部路径。 然后,经由延迟电路将数据部分发送到多个存储器中相同的写入地址。 写入地址通过移位寄存器发送到多个存储器,以允许单个单元的数据部分在多个存储器内占据相同的地址。 控制电路基于每个小区的头部部分或路由表中包含的信息来确定每个小区的正确输出高速公路。 然后,数据部分从多个存储器中的读取地址读出并被另一个旋转矩阵旋转。 旋转的数据部分沿着确定的输出高速公路改变固定长度的单元。

    Cell switching system of asynchronous transfer mode
    3.
    发明授权
    Cell switching system of asynchronous transfer mode 失效
    异步传输模式的小区切换系统

    公开(公告)号:US4947388A

    公开(公告)日:1990-08-07

    申请号:US333282

    申请日:1989-04-05

    IPC分类号: H04Q3/00 H04L12/931

    摘要: A fixed-length packet switching system, in which fixed-length packets (cells) each composed of a header portion and a data portion are received from a plurality of input lines, and after conversion of the header portions, the received packets are transmitted onto selected ones of output lines designated by their header portions. The system includes a buffer memory having a first buffer area composed of a plurality of subsidiary areas for accumulating cells correspondingly to the output lines, and a second buffer area for accumulating broadcast cells to be transmitted to selected ones of the plurality of output lines; a packet reading circuit for reading the cells from the first buffer area successively corresponding to the output lines and for reading the broadcast cell from the second buffer area at a predetermined frequency; and a broadcast control circuit for reproducing a plurality of broadcast cells from the broadcast cells read from the second buffer area and for transmitting the plurality of reproduced broadcast cells, instead of the cells read from the first buffer area, onto the output lines. The buffer memory is divided into a plurality of buffer areas each corresponding to a respective output line and a packet writing circuit generates addresses sequentially for the respective buffer areas to store cells in a buffer area according to the header portion thereof.

    Method for collecting information about physical constitution of lan
system, method of specifying collision terminals, and method for
detecting noise-generated position
    5.
    发明授权
    Method for collecting information about physical constitution of lan system, method of specifying collision terminals, and method for detecting noise-generated position 失效
    用于收集关于lan系统的体质信息的方法,用于指定碰撞终端的方法以及用于检测噪声产生位置的方法

    公开(公告)号:US6122257A

    公开(公告)日:2000-09-19

    申请号:US815854

    申请日:1997-03-12

    摘要: In a bus type LAN, the data transmitted from a terminal (14) is detected by an adapter (1) connected to one end of a bus (3), and in response thereto the adapter (1) transmits a pulse signal onto the bus (3). An adapter (2) connected to the other end of the bus (3) receives the data transmitted from the terminal (14) and detects its source terminal address. A difference in time between the arrival of the data from the terminal (14) and the arrival of the pulse signal from the adapter (1) is measured by a counter circuit (21), and the count value obtained is stored in a memory (23), forming a pair with the corresponding source terminal address. Thus, the count value can be obtained for each terminal during the normal operation of the LAN. The data of the memory (23) are extracted by a personal computer (5), where the physical position of each terminal is calculated in accordance with the bus propagation velocity, and is displayed or printed out as a physical constitution diagram. Also, the packet signal, its collision signal, the jam signal and the pulse signal are utilized to measure the difference in time for the arrival of the pulse signal and so forth, to thereby specify the terminal having caused the packet collision.

    摘要翻译: PCT No.PCT / JP95 / 01803 Sec。 371日期1997年3月12日 102(e)1997年3月12日PCT PCT 1995年9月12日PCT公布。 公开号WO96 / 08897 日期1996年3月21日在总线型LAN中,从连接到总线(3)的一端的适配器(1)检测从终端(14)发送的数据,并且响应于适配器(1)发送 脉冲信号到总线上(3)。 连接到总线(3)的另一端的适配器(2)接收从终端(14)发送的数据并检测其源终端地址。 通过计数器电路(21)测量来自终端(14)的数据的到达与来自适配器(1)的脉冲信号的到达之间的时间差,将获得的计数值存储在存储器 23),与对应的源终端地址形成一对。 因此,在LAN的正常操作期间可以为每个终端获得计数值。 存储器(23)的数据由个人计算机(5)提取,其中根据总线传播速度计算每个终端的物理位置,并作为物理结构图被显示或打印出来。 此外,分组信号,其冲突信号,阻塞信号和脉冲信号用于测量脉冲信号等到达时间的差异,从而指定引起分组冲突的终端。

    Method of manufacturing corrugate tube and molding apparatus thereof
    7.
    发明授权
    Method of manufacturing corrugate tube and molding apparatus thereof 失效
    波纹管的制造方法及其成型装置

    公开(公告)号:US4821551A

    公开(公告)日:1989-04-18

    申请号:US124961

    申请日:1987-11-24

    IPC分类号: B29D23/18 B21D15/06

    CPC分类号: B29D23/18 B29L2023/18

    摘要: There is disclosed a technique characterized by the following steps. An axial load is applied from both ends of a primary tube while locally heating the primary tube by use of a high frequency coil in the peripheral direction, and the heated portion is thereby bulged. The application of load is stopped almost concurrently with termination of the heating process. The heated portion is forcibly cooled with a cooling liquid, thus molding one crest. Then the primary tube and the high frequency coil are relatively moved. The next crest is formed by repeating the foregoing steps. Such operations are consecutively repeated in the axial direction of the primary tube, thereby obtaining a corrugate tube formed with crests having a large amount of bulge and a small pitch.

    摘要翻译: 公开了以下步骤的技术特征。 在主管的两端施加轴向载荷,同时通过在周向上使用高频线圈局部加热主管,从而加热部分膨胀。 在加热过程结束时,负载的应用几乎同时停止。 加热部分用冷却液强制冷却,从而成型一个峰。 然后主管和高频线圈相对移动。 通过重复上述步骤形成下一个峰。 这样的操作在主管的轴向上连续地重复,从而获得形成有具有大量凸起和小间距的波峰的波纹管。