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.