Patents by Inventor Cássio Barboza Ribeiro

Cássio Barboza 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).

  • Publication number: 20100261469
    Abstract: In accordance with an example embodiment of the present invention, a method is disclosed that comprises measuring a first link quality of a first link based at least in part on a first power value; measuring a second link quality of a second link based at least in part on a second power value; and determining a suitable device-to-device (D2D) mode for a D2D connection based at least in part on the first link quality, the second link quality, and one or more D2D user equipment (UE) constraints.
    Type: Application
    Filed: April 8, 2009
    Publication date: October 14, 2010
    Applicant: NOKIA CORPORATION
    Inventors: Cassio Barboza Ribeiro, Klaus Franz Doppler, Timo Kalevi Koskela, Tao Chen, Sami-Jukka Hakola
  • Publication number: 20100009675
    Abstract: Disclosed are apparatus, methods and computer programs to establish device-to-device communications in a wireless network. A method includes sending an initiation message from a first device to initiate device-to-device communication with a second device; receiving a message indicating a request for setting up radio resources for device-to-device communication; sending a message to the second device, the message including a request to set up resources for device-to-device communication and, in response to establishing device-to-device communication with the second device using the resources, sending an acknowledgment that device-to-device communication is established.
    Type: Application
    Filed: July 14, 2008
    Publication date: January 14, 2010
    Inventors: Carl Wijting, Klaus F. Doppler, Cassio Barboza Ribeiro, Mika P. Rinne
  • Publication number: 20090325625
    Abstract: A network determines that a first radio node communicating on a radio resource with a second radio node is interfering with a third radio node communicating on the radio resource with the network. The network manages the interference by controlling transmit power of at least one of the first radio node and the third radio node. It may be by sending a command that indicates an amount by which the first or second radio node is to decrease its transmit power; and/or that indicates an amount by which the third radio node is to boost its transmit power. The network can measure a sounding signal it triggers from the first radio node, measure and compare to a threshold that guarantees a QoS for the third radio node, and compute appropriate backoff or boost values. The first and second radio nodes may be using device-to-device communications or a femto network.
    Type: Application
    Filed: June 3, 2009
    Publication date: December 31, 2009
    Inventors: Klaus Hugl, Cassio Barboza Ribeiro, Klaus F. Doppler, Carl S. Wijting, Pekka Markus Nikolai Janis
  • Publication number: 20080311939
    Abstract: An apparatus includes a modulator configured to modulate a plurality of data sequences, where individual ones of the plurality of data sequences correspond to individual ones of a plurality of user equipment; a transmitter configured for operation with a plurality of antennas and further configured to simultaneously transmit the modulated data sequences to the plurality of user equipment; and a receiver configured to receive one of an acknowledgment or a non-acknowledgment indication from individual ones of the plurality of user equipment indicating success or failure, respectively, of an individual one of the user equipment correctly receiving a corresponding transmitted data sequence.
    Type: Application
    Filed: June 18, 2008
    Publication date: December 18, 2008
    Inventors: Klaus Hugl, Marko Lampinen, Cassio Barboza Ribeiro