Method for modifying a multicast tree in a switching network

Details Method for modifying a multicast tree in a switching network Method for modifying a multicast tree in a switching network

1995-09-13

1997-02-04

Olms, Douglas W.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

H04L 1256

Patent

active

056006420

ABSTRACT:
In a switching network with a plurality of inlets and outlets and a plurality of interconnected switching nodes having inputs and outputs with respective addresses, a method is described of modifying a first set of outlets to which a cell stream is routed from one of the inlets to a second set of outlets to which this cell stream is to be routed, the addresses of the outputs of each switching node from which the cell stream is output being stored in a routing table of the node. The method includes the steps of transmitting a modification request message to the inlets from each outlet belonging to one but not to both sets and in each switching node receiving the modification request message on one of its outputs, selectively transmitting the request message to the inlets or transmitting a confirmation message to the above each outlet depending on the absence or presence in the node routing table of addresses of node outputs other than the one node output, respectively.

REFERENCES:
patent: 5325090 (1994-06-01), Goeldner
XIV International Switching Symposium, vol. 2 of 2, 25 Oct. 1992, Yokohama, pp. 156-160, K. J. Schrodi, et al, "Multicast Handling in a Self-Routing Switch" XP 000337713.
"An ATM switching architecture with intrinsic multicast capabilities for the Belgian broadband experiment" De Prycker et al, Proceedings ISS 1990, Stockholm, May 1990, pp. 111-118.

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