Patent ID: 6993593
Filing Date: 2006-01-31
Classification: H04L

Abstract:
1. An interdomain routing system having a transmission node and a destination node, wherein said transmission node including own intradomain path selection means for selecting a path by exchanging information about a path in the own domain, interdomain path selection means for receiving information about a path between domains to select a path, destination domain reception path candidate obtaining means for requesting a destination node for obtaining a group of candidate paths from the transmission node toward the destination node, and end-to-end path selection means for selecting an optimum path end to end based on paths in the domain of the transmission node, interdomain paths from the transmission domain to the destination domain and paths in the domain of the destination node, and said destination node including own intradomain path selection means for selecting a path by exchanging information about a path in a domain, interdomain path selection means for receiving information about a path between domains to select a path, and destination domain reception path candidate reply means responsive to a request from the transmission node for returning, as a reply, a group of candidate paths from the transmission node toward the destination node.