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    3.
    发明专利
    未知

    公开(公告)号：DE2448802A1

    公开(公告)日：1975-07-10

    申请号：DE2448802

    申请日：1974-10-12

    Applicant: IBM

    Inventor： HAAS LEE CLYDE ,  WEST LYNN PARKER

    IPC: G06F13/00 ,  G06F13/22 ,  H04L12/403 ,  H04L11/16 ,  G06F15/20

    Abstract: A communications enabling method and apparatus are disclosed in which the mean response time for the receipt of service from a central station at any one of a plurality of remote stations on a duplex communications channel network is reduced. The method and apparatus are designed to enable entire populations of remote stations or terminals, which potentially are awaiting service and have messages or data to transmit to use the channel. If only one response is received from such an enabling technique, the data is taken and the population is re-enabled. If more than one response is received and the responses conflict with one another, a re-enable sequence is conducted for some lesser plurality or sub group of the entire population until the contending responses are eliminated. The technique utilized is a partitioned search which eliminates contending stations in a rapid and effective manner.

    4.
    发明专利
    未知

    公开(公告)号：DE3687586D1

    公开(公告)日：1993-03-11

    申请号：DE3687586

    申请日：1986-02-14

    Applicant: IBM

    Inventor： HAAS LEE CLYDE ,  LOEB MITCHELL LEVY

    IPC: H04J1/00 ,  G02B6/34 ,  H04B10/00 ,  H04B10/07 ,  H04B10/2507 ,  H04J14/00 ,  H04J14/02 ,  H04L7/00 ,  H04B10/18

    Abstract: When a byte of digital data is transmitted through a dispersive medium using frequency or wavelength division multiplexing (WDM) techniques, individual bits in the byte are normally delayed different amounts of time. This is referred to as bit skew. WDM apparatus is described along with a system for deskewing WDM data received after transit through a dispersive medium. Two bits in a given byte of data are detected. The relative times of arrival of the remaining bits in a byte are predicted using the relative delay between the two detected bits and the known frequency-related dispersion characteristics of the transmission medium. Certain bits in each received byte may be delayed using clock delay lines or registers to reduce the amount of time skew between the various bits in a byte.

    5.
    发明专利
    未知

    公开(公告)号：DE3687586T2

    公开(公告)日：1993-08-19

    申请号：DE3687586

    申请日：1986-02-14

    Applicant: IBM

    Inventor： HAAS LEE CLYDE ,  LOEB MITCHELL LEVY

    IPC: H04J1/00 ,  G02B6/34 ,  H04B10/00 ,  H04B10/07 ,  H04B10/2507 ,  H04J14/00 ,  H04J14/02 ,  H04L7/00 ,  H04B10/18

    Abstract: When a byte of digital data is transmitted through a dispersive medium using frequency or wavelength division multiplexing (WDM) techniques, individual bits in the byte are normally delayed different amounts of time. This is referred to as bit skew. WDM apparatus is described along with a system for deskewing WDM data received after transit through a dispersive medium. Two bits in a given byte of data are detected. The relative times of arrival of the remaining bits in a byte are predicted using the relative delay between the two detected bits and the known frequency-related dispersion characteristics of the transmission medium. Certain bits in each received byte may be delayed using clock delay lines or registers to reduce the amount of time skew between the various bits in a byte.

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