Patents by Inventor David Odhams

David Odhams 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).

  • Route protection in a communication network
    Patent number: 7380017
    Abstract: A communications network comprises a lower transport layer and an upper overlay incorporating a plurality of routers. Adjacencies are defined between respective pairs of routers. Path protection is provided by defining a software model of the overlay of the network and defining in the model a hierarchy of protection levels for the main path. Each protection level is characterised by a respective set of one or more broken adjacencies in the model, the adjacencies to be broken being determined from a knowledge of the underlying topology. A protection level is selected and a protection path avoiding the broken adjacencies associated with that protection level is calculated. If this calculated path is not available in the real network, a lower protection level in the hierarchy is selected and the protection path calculation repeated. The process continues until a suitable protection path is identified.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: May 27, 2008
    Assignee: Nortel Networks Limited
    Inventors: Jon Weil, Alex Morrall, David Odhams, Kenneth Hayward, Loa Andersson
  • Route protection in a communication network
    Publication number: 20020188756
    Abstract: A communications network comprises a lower transport layer and an upper overlay incorporating a plurality of routers. Adjacencies are defined between respective pairs of routers. Path protection is provided by defining a software model of the overlay of the network and defining in the model a hierarchy of protection levels for the main path. Each protection level is characterised by a respective set of one or more broken adjacencies in the model, the adjacencies to be broken being determined from a knowledge of the underlying topology. A protection level is selected and a protection path avoiding the broken adjacencies associated with that protection level is calculated. If this calculated path is not available in the real network, a lower protection level in the hierarchy is selected and the protection path calculation repeated. The process continues until a suitable protection path is identified.
    Type: Application
    Filed: May 3, 2001
    Publication date: December 12, 2002
    Applicant: NORTEL NETWORKS LIMITED
    Inventors: Jon Weil, Alex Morrall, David Odhams, Kenneth Hayward, Loa Andersson