Patents Represented by Attorney, Agent or Law Firm James D. Harrison
  • Patent number: 6532088
    Abstract: An apparatus and a method for transporting IP user traffic over a fiber optic ring network that includes a plurality of fiber optic ring network nodes. One ring is for conducting the user traffic on a working path and the other ring is for conducting the same user traffic on a protection path in the event of a failure in a communication link in the first ring on a protection path. A central node is coupled to a plurality of nodes to provide forwarding tables and updates to the nodes. As a result, IP traffic may be routed through the fiber optic ring network in a manner that provides fast switching from a working path to a protection path to minimize lost data packets whenever a communication link in the working path fails. Additionally, this capability is provided without requiring each node to have full IP routing capability. The forwarding tables for the protection and working paths provide for path routes and forwarding for the packets on a packet by packet basis.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: March 11, 2003
    Assignee: Alcatel
    Inventors: Ram Dantu, Pete O'Connell