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Architectural Enhancement And Implementation of Cross-Bar Switch Subsystem

IP.com Disclosure Number: IPCOM000119985D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 4 page(s) / 115K

Publishing Venue

IBM

Related People

Hatta, T: AUTHOR [+3]

Abstract

Disclosed is an architectural enhancement onto the Low-End High- Performance Switch Subsystem architecture. The Low-end High-Performance Switch Subsystem (LEHS) is a link provider, based on a cross-bar switch module for computer components or computer systems. The enhancement described herein is a Pass-through Server which carries the input message frame to the output channel.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Architectural Enhancement And Implementation of Cross-Bar Switch
Subsystem

      Disclosed is an architectural enhancement onto the
Low-End High- Performance Switch Subsystem architecture.  The Low-end
High-Performance Switch Subsystem (LEHS) is a link provider, based on
a cross-bar switch module for computer components or computer
systems.  The enhancement described herein is a Pass-through Server
which carries the input message frame to the output channel.

      This enhancement will be best understood with reference to the
drawing which schematically shows the Low-End High-Performance Switch
Subsystem and Pass-through Server. LEHS consists of Request Server,
Connect Server, Switch Map Generator, Cross-bar switch, and a set of
Input and Output Channels shown in Fig. 1.

      '*' designates the Pass-through Server newly added to LEHS in
this enhancement.  The interface to LEHS is defined by a set of
request messages and a set of acknowledge messages.  A request
message from an input channel is a request to connect or disconnect a
circuit from this input port to one or more output ports as to the
cross-point of the cross-bar switch module.  LEHS responds to these
request messages by sending acknowledge messages giving the status of
the request.

      Logically, a set of switch servers consults a set of data
structures in order to use the cross-bar switch which provides the
connection between input port and output port for high-speed
communication. Each message processing flow is shown in Fig. 2.

      This Pass-t...