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    3.
    发明专利
    未知

    公开(公告)号：DE3687648T2

    公开(公告)日：1993-08-12

    申请号：DE3687648

    申请日：1986-11-25

    Applicant: IBM

    Inventor： HAILPERN BRENT TZION ,  HOEVEL LEE WINDSOR ,  THEFAINE YANNICK JEAN

    IPC: H04L12/00 ,  H04L12/44

    Abstract: A circuit-switched local area network relies on a star topology for data transfer. Signalling informa­tion is confined to a single common signalling link or channel (S). Contention on the signalling link or channel is obviated by the use of a contention re­solution device (60) which is coupled to all ports (10) for receiving requests to send from the ports and for providing clear to send messages to the requesting ports, in turn. A port desiring communication with another port first raises its request to send and when it receives a clear to send from the contention resolution device, it places the message or call set up information on the signalling link or channel. Once the call or message set up information has been transmitted, the addressing port may de-assert its request to send which will result in the contention resolution device de-asserting the clear to send.

    4.
    发明专利
    未知

    公开(公告)号：DE3687648D1

    公开(公告)日：1993-03-11

    申请号：DE3687648

    申请日：1986-11-25

    Applicant: IBM

    Inventor： HAILPERN BRENT TZION ,  HOEVEL LEE WINDSOR ,  THEFAINE YANNICK JEAN

    IPC: H04L12/00 ,  H04L12/44

    Abstract: A circuit-switched local area network relies on a star topology for data transfer. Signalling informa­tion is confined to a single common signalling link or channel (S). Contention on the signalling link or channel is obviated by the use of a contention re­solution device (60) which is coupled to all ports (10) for receiving requests to send from the ports and for providing clear to send messages to the requesting ports, in turn. A port desiring communication with another port first raises its request to send and when it receives a clear to send from the contention resolution device, it places the message or call set up information on the signalling link or channel. Once the call or message set up information has been transmitted, the addressing port may de-assert its request to send which will result in the contention resolution device de-asserting the clear to send.

    5.
    发明专利
    未知

    公开(公告)号：DE3577761D1

    公开(公告)日：1990-06-21

    申请号：DE3577761

    申请日：1985-06-03

    Applicant: IBM

    Inventor： COCKE JOHN ,  HAILPERN BRENT TZION ,  HOEVEL LEE WINDSOR ,  SHAPIRO EUGENE ,  BLOUNT MARION LEE

    IPC: G06F12/10 ,  G06F12/02 ,  G06F12/06 ,  G06F13/16 ,  G06F15/167 ,  G06F15/173

    Abstract: A plurality of intelligent work stations (10) are provided access to a shared memory (12) through a switching hierarchy including a first array of mapping boxes (14) for receiving a first address from an intelligent work station and including a virtual address and offset and for converting the virtual address into a terminal switch port designation and logical address, a first switch (16) for forwarding the logical address and offset to the designated terminal switch port, a second array of mapping boxes (18) for receiving the logical address and offset and for I converting the logical address into a memory switch port designation and physical address, and a second switch (20) for forwarding the physical address and offset to the designated memory switch port as an address to the shared memory.

    6.
    发明专利
    未知

    公开(公告)号：DE3751706D1

    公开(公告)日：1996-03-28

    申请号：DE3751706

    申请日：1987-11-17

    Applicant: IBM

    Inventor： PERRY KENNETH JAY ,  THEFAIN YANNICK JEAN-GEORGES ,  HAILPERN BRENT TZION ,  HOEVEL LEE WINDSOR ,  SHEA DENNIS GERARD

    IPC: G06F15/16 ,  G06F15/173 ,  G06F15/177 ,  G06F15/80

    Abstract: A system for establishing connections between processors in a distributed system of processors connected by a multiple multi-drop network. No wires are needed in addition to those already present in an existing network. In such a network connecting n processors , each processor is connected to all others by n identical multi-drop links. Links are assigned to processors on a one-to-one basis and a processor may transmit messages only on its assigned link. Processors may receive messages on any of these links, thereby enabling a processor to communicate with all others. The advantage of such a network over a single multi-drop link is that there is no contention for a shared link since each processor has a unique transmit line. In addition, no central control means is required for the network, as completely distributed control is utilized.

    8.
    发明专利
    未知

    公开(公告)号：DE3688285T2

    公开(公告)日：1993-10-28

    申请号：DE3688285

    申请日：1986-11-25

    Applicant: IBM

    Inventor： FRIEDMAN LEE GARY ,  HAILPERN BRENT TZION ,  HOEVEL LEE WINDSOR ,  THEFAINE YANNICK JEAN

    IPC: H04L12/00 ,  H04L12/44 ,  H04L12/28

    Abstract: A switching system (50) or local area network is non-blocking, transmit-secure and employs a star type topology. A back plane (50B) uses n(n-1) bus lines to interconnect n ports (30). Each port can transmit on any one of n-1 bus lines depending on the identity of the destination port. Likewise, each port can receive from any of n-1 bus lines, depending on the identity of the transmitting port. Signalling as well as data flow on the same bus lines. Each of the ports includes a dedicated microprocessor (303) along with an arbit­rator (306) to resolve contention. The ports further have transmit and receive multiplexers (305, 302) coupled between the back plane and an associated work station or information source/sink.

    9.
    发明专利
    未知

    公开(公告)号：DE3688285D1

    公开(公告)日：1993-05-19

    申请号：DE3688285

    申请日：1986-11-25

    Applicant: IBM

    Inventor： FRIEDMAN LEE GARY ,  HAILPERN BRENT TZION ,  HOEVEL LEE WINDSOR ,  THEFAINE YANNICK JEAN

    IPC: H04L12/00 ,  H04L12/44 ,  H04L12/28

    Abstract: A switching system (50) or local area network is non-blocking, transmit-secure and employs a star type topology. A back plane (50B) uses n(n-1) bus lines to interconnect n ports (30). Each port can transmit on any one of n-1 bus lines depending on the identity of the destination port. Likewise, each port can receive from any of n-1 bus lines, depending on the identity of the transmitting port. Signalling as well as data flow on the same bus lines. Each of the ports includes a dedicated microprocessor (303) along with an arbit­rator (306) to resolve contention. The ports further have transmit and receive multiplexers (305, 302) coupled between the back plane and an associated work station or information source/sink.

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