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

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 12/18 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2158123

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; - 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.

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