Patents by Inventor Rafael L. RIVERA-BARRETO

Rafael L. RIVERA-BARRETO 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: 20160073299
    Abstract: Techniques are disclosed relating to informing a network that a UE desires packet-switched voice communication. In one embodiment, a method includes receiving first information from a UE device requesting voice communication over a packet-switched network. In this embodiment, the method further includes transmitting, in response to the first information, second information to a base station serving the UE device, wherein the second information indicates that the UE device is requesting voice communication over the packet-switched network. In this embodiment, the transmitting is performed prior to establishment of a dedicated bearer by the base station for the UE device. In this embodiment, the second information operates to configure communications between the base station and the UE device to provide a particular quality of service for the packet-switched voice communication using the dedicated bearer.
    Type: Application
    Filed: August 4, 2015
    Publication date: March 10, 2016
    Inventors: Huarui Liang, Tarik Tabet, Dawei Zhang, Farouk Belghoul, Samy Khay-Ibbat, Rafael L. Rivera-Barreto
  • Publication number: 20160044589
    Abstract: Systems and methods that enhance radio link performance in a multi-carrier environment. A method may be performed by a UE that includes scanning a plurality of carrier components for a primary cell, determining a first bandwidth of the primary cell, scanning for a secondary cell, determining a second bandwidth of the secondary cell, determining a maximum aggregated bandwidth by combining the first bandwidth and the second bandwidth and when the maximum aggregated bandwidth exceeds a bandwidth capability of the UE, performing a cell selection procedure to select one of the primary cell or the secondary cell based on a higher of the first bandwidth and the second bandwidth.
    Type: Application
    Filed: November 7, 2014
    Publication date: February 11, 2016
    Inventors: Sreevalsan Vallath, Deepankar Bhattacharjee, Navid Damji, Christian W. Mucke, Rafael L. Rivera-Barreto, Tarik Tabet
  • Publication number: 20160021557
    Abstract: Estimating loading and potential available throughput a serving cell of a wireless user equipment (UE) device. Physical layer metrics of a channel on which the UE communicates with the serving cell may be measured. Cell utilization of the serving cell may be calculated based at least in part on the measured physical layer metrics. A maximum available throughput of the serving cell may be calculated based on the cell utilization.
    Type: Application
    Filed: September 30, 2015
    Publication date: January 21, 2016
    Inventors: Tarik Tabet, Sarma V. Vangala, Samy Khay-Ibbat, Swaminathan Balakrishnan, Ajoy K. Singh, Sree Ram Kodali, Rafael L. Rivera-Barreto, Syed Aon Mujtaba, Faraz Faheem, Sreevalsan Vallath
  • Publication number: 20160007240
    Abstract: Mobile devices, base stations, and/or relay stations may implement CSFB (circuit switched fallback) operations by using RRC (radio resource control) connection release and/or handover procedures. If the CSFB RAT (radio access technology) target is not well configured, the UE may be informed and provisioned by the NW during a CSFB procedure with the information to return to LTE. Having this information, the UE may perform an autonomous search of LTE cells after the CSFB call release, speeding up return to LTE. To minimize potential call failures during CSFB, the UE may autonomously perform an additional cell search, in particular a search for cells on a RAT different from the initial target RAT. This creates an opportunity to prevent call failure of CSFB calls that would otherwise fail. The UE may be provisioned during the CSFB procedure with information to perform the additional cell search, should such a search be necessary.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 7, 2016
    Inventors: Farouk Belghoul, David Boettger, Krisztian Kiss, Dawei Zhang, Tarik Tabet, Rafael L. Rivera-Barreto, Huarui Liang
  • Publication number: 20150237615
    Abstract: This disclosure relates to network infrastructure identification by a wireless user equipment (UE) device. According to one embodiment, one or more requests for infrastructure identification information may be transmitted. Each request may indicate a current location of the UE. A respective response may be received to each corresponding respective request. Each respective response may include infrastructure identification information for the current location indicated in the corresponding respective request. Features such as vendor, type, model, or version of cellular network infrastructure equipment with which the UE performs cellular communication may be identified based on the response(s), and features specific to the identified equipment may accordingly be implemented during such cellular communication.
    Type: Application
    Filed: September 27, 2014
    Publication date: August 20, 2015
    Inventors: Paul V. Flynn, Rafael L. Rivera-Barreto, Sreevalsan Vallath, Francisco J. Gonzalez
  • Publication number: 20150181483
    Abstract: This application discloses various techniques for call establishment using voice-over LTE (VoLTE) in networks supporting time division (TD) and frequency division duplexed (FDD) LTE communication systems. Such techniques can include systems and methods for mobile-originated calls for a UE in a TD-LTE cell, systems and methods for mobile-terminated calls for a connected UE in a TD-LTE cell and systems and methods for mobile-terminated calls for an idle UE in a TD-LTE cell. These methods and systems can leverage component carriers from a carrier aggregating capable UE to facilitate more efficient and/or effective UE call establishment.
    Type: Application
    Filed: September 30, 2014
    Publication date: June 25, 2015
    Inventors: Tarik Tabet, Farouk Belghoul, Rafael L. Rivera-Barreto, Samy Khay-Ibbat, Sree Ram Kodali, Sarma V. Vangala, Syed A. Mujtaba, Swaminathan Balakrishnan
  • Publication number: 20150181472
    Abstract: This application presents techniques for an LTE user equipment (UE) to use an extended service request (ESR) extension for LTE TDD to FDD redirection for mobile originated and mobile terminated VoLTE calls. These techniques include the UE informing the network that it supports the particular features of the ESR extensions presented. Once the UE attaches to the network, a radio resource control (RRC) message can be sent to indicate that the UE supports the new ESR extension, after which the UE can use the new ESR extension to facilitate an LTE TDD to FDD redirection for the VoLTE call.
    Type: Application
    Filed: September 30, 2014
    Publication date: June 25, 2015
    Inventors: Farouk Belghoul, Tarik Tabet, Rafael L. Rivera-Barreto, Samy Khay-Ibbat, Sree Ram Kodali, Sarma V. Vangala, Syed A. Mujtaba, Swaminathan Balakrishnan
  • Publication number: 20150173009
    Abstract: Systems and methods that enhance radio link performance in a multi-carrier environment. A method may be performed by a UE that includes scanning a plurality of carrier components for a primary cell, determining a first bandwidth of the primary cell, scanning for a secondary cell, determining a second bandwidth of the secondary cell, determining a maximum aggregated bandwidth by combining the first bandwidth and the second bandwidth and when the maximum aggregated bandwidth exceeds a bandwidth capability of the UE, performing a cell selection procedure to select one of the primary cell or the secondary cell based on a higher of the first bandwidth and the second bandwidth.
    Type: Application
    Filed: November 7, 2014
    Publication date: June 18, 2015
    Inventors: Sreevalsan Vallath, Deepankar Bhattacharjee, Navid Damji, Christian W. Mucke, Rafael L. Rivera-Barreto, Tarik Tabet
  • Publication number: 20150172987
    Abstract: A user equipment (UE) configured to connect to a network and operate in a carrier aggregation mode and a single carrier mode performs methods to select optimal component carriers. The methods include determining that a primary component carrier is operating less optimally than a secondary component carrier, sending an indication to the network that the primary component carrier is operating less optimally than the secondary component carrier, acquiring the secondary component carrier as a target primary component carrier and operating with the secondary component carrier as the target primary carrier component. In one exemplary embodiment, the indication is declaring a radio link failure (“RLF”) between the UE and the network. In another exemplary embodiment, the indication is a measurement report send to the network that triggers a handover procedure for the UE.
    Type: Application
    Filed: September 30, 2014
    Publication date: June 18, 2015
    Inventors: Swaminathan Balakrishnan, Samy Khay-Ibbat, Sarma V. Vangala, Tarik Tabet, Rafael L. Rivera-Barreto, Sree Ram Kodali, Sai Sravan Bharadwaj Karri
  • Publication number: 20150173094
    Abstract: A system, devices and methods for providing input from a user equipment (UE) for the selection of a carrier channel combination for use in carrier aggregation. The exemplary system includes a UE configured to perform carrier aggregation, the UE storing a radio frequency (RF) calibration table including a plurality of transmission related requirements specific to the UE, the UE configured to generate priority data for each carrier channel combination supported for use in carrier aggregation based upon the RF calibration table and a network component receiving the priority data and an indication from the UE, the network component configured to select a carrier channel combination for use in carrier aggregation based upon the priority data, the network component transmitting carrier aggregation configuration data including the selected carrier channel combination to the UE.
    Type: Application
    Filed: September 30, 2014
    Publication date: June 18, 2015
    Inventors: Sarma V. VANGALA, Swaminathan Balakrishnan, Tarik Tabet, Samy Khay-Ibbat, Rafael L. Rivera-Barreto, Dawei Zhang, Sree Ram Kodali
  • Publication number: 20150172032
    Abstract: Methods that are performed by a user equipment (UE) and corresponding methods of base stations that allow a UE to determine whether the UE is in a carrier aggregation enabled or disabled state. One exemplary embodiment of a method performed by a UE determines a first artificial value for a first parameter and a second artificial value for a power headroom (PHR) for a secondary component carrier (SCC), the first and second artificial values being substantially low relative to a configuration of the network, generates an artificial report including the first and second artificial values, transmits the artificial report to a primary cell providing a primary component carrier (PCC) and receives an indication that the UE is placed in a carrier aggregation disabled state.
    Type: Application
    Filed: September 30, 2014
    Publication date: June 18, 2015
    Inventors: Samy KHAY-IBBAT, Tarik TABET, Sarma V. VANGALA, Swaminathan BALAKRISHNAN, Rafael L. RIVERA-BARRETO, Sree Ram KODALI