Patents by Inventor Celso C. Ribeiro

Celso C. Ribeiro 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).

  • System for routing and wavelength assignment in wavelength division multiplexing optical networks
    Patent number: 8693871
    Abstract: A method for routing and wavelength assignment (RWA) in an optical network with improved heuristics for reducing the computational times required for the RWA. The method minimizes the number of wavelengths by packing the lightpaths using a minimum number of bins in a bin packing problem. Computational efficiency is enhanced by using several novel methods to determine shortest paths and eliminate arcs in a graph that represents the network topology.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: April 8, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Mauricio Guilherme de Carvalho Resende, Thiago Ferreira de Noronha, Celso C. Ribeiro
  • Minimum Cost Networks With Redundant Points Of Presence
    Publication number: 20130244671
    Abstract: Methods, systems, and products determine minimum cost networks. A k-fold coverage formulation is applied to potential network elements having cost and coverage parameters. Iterative heuristics are used to find an optimal solution to the k-set coverage formulation. The approximate solutions to the k-set coverage formulation are then used to select at least some of the potential network elements for use in a minimum cost network.
    Type: Application
    Filed: May 10, 2013
    Publication date: September 19, 2013
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Mauricio G. Resende, Celso C. Ribeiro, Luciana S. Pessoa
  • System for routing and wavelength assignment in wavelength division multiplexing optical networks
    Publication number: 20100158528
    Abstract: A method for routing and wavelength assignment (RWA) in an optical network with improved heuristics for reducing the computational times required for the RWA. The method minimizes the number of wavelengths by packing the lightpaths using a minimum number of bins in a bin packing problem. Computational efficiency is enhanced by using several novel methods to determine shortest paths and eliminate arcs in a graph that represents the network topology.
    Type: Application
    Filed: December 23, 2008
    Publication date: June 24, 2010
    Inventors: Mauricio Guilherme de Carvalho Resende, Thiago Ferreira de Noronha, Celso C. Ribeiro