A packet switching fabric includes a data ring, a control ring, a plurality of network links each coupled to at least one network node, and a plurality of switching devices coupled together by the data ring and the control ring so that the network links can be selectively communicatively coupled. Each...http://www.google.com/patents/US6246692?utm_source=gb-gplus-sharePatent US6246692 - Packet switching fabric using the segmented ring with resource reservation control
