公开(公告)号：CA1264863A

公开(公告)日：1990-01-23

申请号：CA522999

申请日：1986-11-14

Applicant: IBM

Inventor： FRIEDMAN LEE G ,  HAILPERN BRENT T ,  HOEVEL LEE W ,  THEFAINE YANNICK J

IPC: H04L12/00 ,  H04L12/44 ,  H04L11/00 ,  H04L11/16

Abstract: A TRANSMIT-SECURE NON-BLOCKING CIRCUIT-SWITCHED LOCAL AREA NETWORK A switching system or local area network is nonblocking, transmit-secure and employs a star type topology. A back plane uses n(n-1) bus lines to interconnect n ports. 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 along with an arbitrator to resolve contention. The ports further have transmit and receive multiplexers coupled between the back plane and an associated work station or information source/sink.

公开(公告)号：CA1229422A

公开(公告)日：1987-11-17

申请号：CA481723

申请日：1985-05-16

Applicant: IBM

Inventor： COCKE JOHN ,  HAILPERN BRENT T ,  HOEVEL LEE W ,  SHAPIRO EUGENE ,  BLOUNT MARION L

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

Abstract: INTERCONNECT SCHEME FOR SHARED MEMORY LOCAL NETWORKS A plurality of intelligent work stations are provided access to a shared memory through a switching hierachy including a first array of mapping boxes 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 for forwarding the logical address and offset to the designated terminal switch port, a second array of mapping boxes for receiving the logical address and offset and for converting the logical address into a memory switch port designation and physical address, and a second switch for forwarding the physical address and offset to the designated memory switch port as an address to the shared memory.