One or more labeled routing trees (LRTS) are produced at a router of a computer network according to a shortest path determination made over a partial topology graph of the network, which graph is produced according to knowledge of adjacent links of the router and one or more LRTs of neighboring routers....http://www.google.de/patents/US6836463?utm_source=gb-gplus-sharePatent US6836463 - System for communicating labeled routing trees to establish preferred paths and source routes with local identifiers in wireless computer networks
