Method of forming routing data
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United States of America Patent
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-
Dec 25, 2001
Grant Date -
N/A
app pub date -
Apr 8, 1999
filing date -
Dec 21, 1995
priority date (Note) -
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Abstract
Switching nodes of a communications network are assigned subnetworks and are interconnected to one another in any desired fashion. Stored in a source switching node is at least topology information on the node's own subnetwork and on the interconnection of the subnetworks. In addition, the source switching node is provided with the communications conditions which are required for the communications link to be set up. By reference to the topology information, a subset of switching nodes and connecting lines which satisfies the communications conditions is selected and a route to the destination switching node is determined. Included in this process is a route which, in the direction from the source switching node to the destination switching node, leaves at least one subnetwork once and returns to the subnetwork again in the further course of the route. The routing information is then formed from the route which has been determined.
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