A path oriented routing system and method for packet switching networks with end-to-end internal protocols. It allows switch pairs to communicate over multiple paths without packet disordering. A distributed loop-free shortest path algorithm assigns a number to a path at the time it is created and this...http://www.google.se/patents/US4736363?utm_source=gb-gplus-sharePatent US4736363 - Path oriented routing system and method for packet switching networks