The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 2011
Filed:
Jun. 13, 2003
Giuseppe F. Italiano, Rome, IT;
Rajeev Rastogi, New Providence, NJ (US);
Bulent Yener, Chatham, NY (US);
Giuseppe F. Italiano, Rome, IT;
Rajeev Rastogi, New Providence, NJ (US);
Bulent Yener, Chatham, NY (US);
Alcatel-Lucent USA Inc., Murray Hill, NJ (US);
Abstract
Restoration is provided in a communication system having two or more VPN endpoints coupled together through a network comprising a number of nodes interconnected through edges. VPN endpoints coupled through the network are adapted to communicate through a single connection with multiple other VPN endpoints. The single connection may be a VPN hose connection. A restoration topology, comprising backup edges corresponding to primary edges in the network, is determined for the network. A given primary edge is replaced with one or more backup edges if the given primary edge fails. A graph may represent the network and a tree may represent the connections in the network for VPNs connecting the VPN endpoints. The graph can be reduced to a second graph by determining shortest paths between each node in the tree and creating the backup edges from the shortest paths. The second graph can be reduced to a third graph by adding additional backup edges from tree nodes having non-tree edges to least common ancestor nodes. The third graph can be used to create a two-edge connected tree.