Patent ID: 6333918
Filing Date: 2001-12-25
Classification: H04L

Abstract:
A method for forming routing information for a connection set-up, satisfying adjustable communications conditions, from a source switching node to a destination switching node, in a communications network having at least two subnetworks with switching nodes and connecting lines which connect the at least two subnetworks, subnetworks being connected to one another via connecting lines and topology information on the subnetwork to which the source switching node belongs, and at least on an interconnection of the subnetworks being stored so as to be available for said source switching node, comprising the steps of:selecting a subset of the switching nodes and connecting lines which satisfies the communications conditions and whose topology information is stored in the source switching node;determining a route using elements of this set, which, in a direction from the source switching node to the destination switching node, leaves at least one subnetwork once and returns to said at least one subnetwork, andforming routing information from the route which has been determined.