Method and apparatus for transmitting cells across an ATM switch

Details Method and apparatus for transmitting cells across an ATM switch Method and apparatus for transmitting cells across an ATM switch

1995-09-29

1998-12-22

Pham, Chi H.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370395, 370432, H04L 1256

Patent

active

058526064

ABSTRACT:
The switch fabric of the ATM switch, i.e., the ATM switch backplane bus, switches a cell based on routing information provided by the source LAN or ATM module to an output port on a destination LAN or ATM module of the switching hub. In the described system, the ATM switch is preconfigured to provide a fully connected topology between ports of all modules. In one embodiment, ATM cells transmitted across the ATM switch fabric between a source LAN or ATM module and a destination LAN module, e.g., Token Ring, FDDI or Ethernet, is accomplished by way of a routing tag prepended on the ATM cells. The routing tag provides both unicast and multicast group destination information such that the ATM cells are routed to the appropriate port on a given destination module without the need to establish a virtual circuit between the source module and the destination module using VPI/VCIs.

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Martin de Prycker, "Asynchronous Transfer Mode Solution for Broadband ISDN," Table of Contents and sections 2.4-2.5, 3.1-3.9, 1991.

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