Patents by Inventor Walter Rothkegel

Walter Rothkegel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Signaling protocol for p-cycle restoration
    Patent number: 7835271
    Abstract: Improved p-cycle restoration techniques using a signaling protocol are disclosed. For example, a technique for use in at least one node of a data communication network for recovering from a failure, wherein the data communication network includes multiple nodes and multiple links for connecting the multiple nodes, comprises the following steps/operations. Notification of the failure is obtained at the at least one node. A determination is made whether the failure is a single link failure or one of a node failure and a multiple link failure. A pre-configured protection cycle (p-cycle) plan is implemented when the failure is a single link failure but not when the failure is one of a node failure and a multiple link failure, such that two independent paths in the network are not connected when implementing the pre-configured protection cycle plan.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: November 16, 2010
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Mansoor Ali Khan Alicherry, Peter Hessler, Viswanath Poosala, Walter Rothkegel, Sudipta Sengupta
  • Signaling protocol for p-cycle restoration
    Publication number: 20070153674
    Abstract: Improved p-cycle restoration techniques using a signaling protocol are disclosed. For example, a technique for use in at least one node of a data communication network for recovering from a failure, wherein the data communication network includes multiple nodes and multiple links for connecting the multiple nodes, comprises the following steps/operations. Notification of the failure is obtained at the at least one node. A determination is made whether the failure is a single link failure or one of a node failure and a multiple link failure. A pre-configured protection cycle (p-cycle) plan is implemented when the failure is a single link failure but not when the failure is one of a node failure and a multiple link failure, such that two independent paths in the network are not connected when implementing the pre-configured protection cycle plan.
    Type: Application
    Filed: December 29, 2005
    Publication date: July 5, 2007
    Inventors: Mansoor Alicherry, Peter Hessler, Viswanath Poosala, Walter Rothkegel, Sudipta Sengupta