In a communication network comprising nodes and links between the nodes, a controller node disseminates link state information. A nodal routing table exists at each node comprising routes between pairs of nodes. The nodal routing table is either populated by the given node based on network information...http://www.google.de/patents/US20050281271?utm_source=gb-gplus-sharePatent US20050281271 - State information and routing table updates in large scale data networks
