Patents by Inventor Alan Barbieri

Alan Barbieri 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: 20130343273
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which mandated retransmission of data packets according to a compressed timeline provide an alternative to TTI bundling. A first data unit is transmitted in a first subframe and automatically retransmitted in one or more non-consecutive subframes before a response to a preceding transmission or retransmission of the first data unit has been processed. The retransmissions are terminated after an acknowledgement is processed. The automatic retransmissions occur periodically with a predetermined number of intervening subframes transmitted before each retransmission of the first data unit.
    Type: Application
    Filed: June 6, 2013
    Publication date: December 26, 2013
    Inventors: Alan BARBIERI, Hao XU
  • Publication number: 20130343355
    Abstract: Time division multiplexing (TDM) partitioning is one of the inter-cell interference coordination (ICIC) mechanisms considered for a heterogeneous network (HetNet) ICIC in a co-channel deployment. For example, in subframes that are pre-allocated to an evolved Node B (eNB), neighbor eNBs may not transmit, hence interference experienced by served user equipments (UEs) may be reduced. Semi-persistent scheduling (SPS) grants may have various available periodicities, which may not be compatible with TDM partitioning. Therefore, a UE may miss an SPS opportunity that was scheduled for a subframe that was not usable by the UE. Hence, using SPS grants with small periodicities in a heterogeneous network with TDM partitioning may require changes which may include adjusting the periodicities of the SPS grants, rescheduling of uplink SPS messages based on resource partitioning information (RPI), and/or determining RPI based on current SPS grants.
    Type: Application
    Filed: August 23, 2013
    Publication date: December 26, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Hao Xu, Madhavan Srinivasan Vajapeyam, Aleksandar Damnjanovic
  • Patent number: 8611295
    Abstract: One aspect discloses transition behavior of dynamically changing subframe interlaces and the corresponding behavior of the bases stations during the changing. A method of wireless communication includes receiving a request to dynamically change a subframe interlace. The subframe interlace is transitioned and during the transition either new data transmission is prevented on the prohibited subframe interlace and/or retransmissions are allowed on the prohibited subframe interlace.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: December 17, 2013
    Assignee: Qualcomm Incorporated
    Inventors: Osok Song, Madhavan Srinivasan Vajapeyam, Tingfang Ji, Aleksandar Damnjanovic, Alan Barbieri
  • Patent number: 8594688
    Abstract: A downlink cooperative multi-point (CoMP) framework of a wireless communication system reduces inter-node interference and increases channel gain by scheduling a user equipment (UE) based on improved interference estimates and gain estimates. The UE computes a gain scaling factor (?) based on theoretical gain and actual gain for each available scheduling scenario and transmits the gain scaling factors to an anchor node of the UE's radio reporting set (RRS). The anchor node computes an internal scaling factor (?) based on the received gain scaling factors (?) to estimate an actual gain for the scheduling scenarios. The UE also periodically transmits quantized interference estimates to the anchor node. The anchor node predicts a rate for the scheduling scenarios and schedules the UE based on the internal scaling factor (?), the gain scaling factors (?), and the interference estimates.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: November 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Alexei Yurievitch Gorokhov
  • Patent number: 8588801
    Abstract: Providing for a multipoint equalization (MPE) framework for coordinated multipoint (CoMP) transmission in wireless communication is described herein. The disclosed MPE framework involves distributed scheduling decisions for CoMP transmission, reducing complexity of scheduling coordination as compared with centralized scheduling techniques that coordinate scheduling decisions for multiple network base stations. Further, the MPE framework involves distributed computation of CoMP transmission coefficients, relying on a maximum of two backhaul hops to obtain information for the computation, and disseminate the transmission coefficients. The disclosed MPE framework shows substantial gains in various network deployments over conventional CoMP techniques.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: November 19, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Alexei Yurievitch Gorokhov, V. Sreekanth Annapureddy, Alan Barbieri, Siddhartha Mallik, Stefan Geirhofer
  • Publication number: 20130301458
    Abstract: A method for determining channel quality estimates of two or more types of subframes, such as clean and unclean subframes, may be applicable to both legacy and newer user equipment. A first base station affects a channel quality measurement by either transmitting dummy signals over designed tones that correspond to a second base station, or by puncturing transmissions during designated tones that correspond to the second base station.
    Type: Application
    Filed: July 16, 2013
    Publication date: November 14, 2013
    Inventors: Alan Barbieri, Madhavan Srinivasan Vajapeyam, Tingfang Ji
  • Publication number: 20130294275
    Abstract: Systems and methodologies are described that facilitate dynamically forming clusters in a wireless communication environment. A set of non-overlapping clusters can be formed dynamically over time and in a distributed manner. Each of the clusters can include a set of base stations and a set of mobile devices. The clusters can be yielded based upon a set of local strategies selected by base stations across the network converged upon through message passing. For example, each base station can select a particular local strategy as a function of time based upon network-wide utility estimates respectively conditioned upon implementation of the particular local strategy and disparate possible local strategies that can cover the corresponding base station. Moreover, operation within each of the clusters can be coordinated.
    Type: Application
    Filed: July 9, 2013
    Publication date: November 7, 2013
    Inventors: Alexei Y. Gorokhov, Siddhartha Mallik, Naga Bhushan, Alan Barbieri
  • Publication number: 20130229935
    Abstract: Systems and methodologies are described that facilitate cooperation strategy selection for a network multiple-in-multiple-out (N-MIMO) communication system. As described herein, one or more nodes in a communication system capable of N-MIMO communication can calculate marginal utilities, projected per-user rates, and/or other parameters corresponding to respective associated users. Based on these calculations, respective network nodes can perform user scheduling and selection, cell scheduling and selection, selection of a cooperation strategy (e.g., coordinated silencing, joint transmission, coordinated beamforming, etc.), and/or other operations to provide cooperative communication for respective users. As further described herein, projected rate calculation for a given user can be adjusted based on processing or channel implementation loss associated with the user, interference nulling capability of the user, or other factors.
    Type: Application
    Filed: April 17, 2013
    Publication date: September 5, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Alexei Y. Gorokhov, Siddhartha Mallik, Alan Barbieri, Jilei Hou
  • Patent number: 8498647
    Abstract: Systems and methodologies are described that facilitate dynamically forming clusters in a wireless communication environment. A set of non-overlapping clusters can be formed dynamically over time and in a distributed manner. Each of the clusters can include a set of base stations and a set of mobile devices. The clusters can be yielded based upon a set of local strategies selected by base stations across the network converged upon through message passing. For example, each base station can select a particular local strategy as a function of time based upon network-wide utility estimates respectively conditioned upon implementation of the particular local strategy and disparate possible local strategies that can cover the corresponding base station. Moreover, operation within each of the clusters can be coordinated.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: July 30, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Alexei Y. Gorokhov, Siddhartha Mallik, Naga Bhushan, Alan Barbieri
  • Patent number: 8432821
    Abstract: Systems and methodologies are described that facilitate cooperation strategy selection for a network multiple-in-multiple-out (N-MIMO) communication system. As described herein, one or more nodes in a communication system capable of N-MIMO communication can calculate marginal utilities, projected per-user rates, and/or other parameters corresponding to respective associated users. Based on these calculations, respective network nodes can perform user scheduling and selection, cell scheduling and selection, selection of a cooperation strategy (e.g., coordinated silencing, joint transmission, coordinated beamforming, etc.), and/or other operations to provide cooperative communication for respective users. As further described herein, projected rate calculation for a given user can be adjusted based on processing or channel implementation loss associated with the user, interference nulling capability of the user, or other factors.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: April 30, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Alexei Y. Gorokhov, Siddhartha Mallik, Alan Barbieri, Jilei Hou
  • Publication number: 20130070626
    Abstract: Techniques are provided for channel discovery. For example, there is provided a method operable by a mobile entity that may involve measuring beacon signals associated with the network. In one approach, the method may involve, in response to detecting an Authorized Shared Access (ASA) beacon signal on a frequency common to each network entity on a given ASA channel, extracting frequency information from the ASA beacon signal, wherein the ASA beacon signal comprises a single frequency network (SFN) beacon signal. In another approach, the method may involve, in response to detecting an ASA beacon signal on a frequency common to each network entity on a given ASA channel, extract frequency information from the ASA beacon signal, wherein timing correlates with an operating frequency for the ASA beacon signal.
    Type: Application
    Filed: September 17, 2012
    Publication date: March 21, 2013
    Inventors: Peter Gaal, Alan Barbieri, Rajat Prakash
  • Publication number: 20130051321
    Abstract: Aspects of the present disclosure include a wireless system to reduce quantization error due to codebook-based PMI reporting by precoding channel state information reference signals (CSI-RSs) via a base station. The eNodeB varies the properties for a CSI-RS transmission in a known pattern and receives varying reports from the UE. The eNodeB can reconstruct the PMI with improved accuracy by combining multiple consecutive reports.
    Type: Application
    Filed: August 20, 2012
    Publication date: February 28, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Alan Barbieri, Tingfang Ji, Peter Gaal
  • Publication number: 20130053078
    Abstract: Certain aspects of the present disclosure relate to techniques for backhaul enhancements for cooperative multi-point (CoMP) operations. An aggressor node may take pre-scheduling decisions in advance of beamformed data transmissions based on the pre-scheduling decisions. The aggressor node may communicate the pre-scheduling decisions to one or more victim nodes, for example, via a backhaul link between the aggressor node and the one or more victim nodes. A victim node may take scheduling decisions based at least on the pre-scheduling decisions of the aggressor node to coordinate beamformed transmissions from the victim node with the beamformed transmissions from the aggressor node.
    Type: Application
    Filed: August 23, 2012
    Publication date: February 28, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Alan Barbieri, Tingfang Ji, Osok Song
  • Publication number: 20130053077
    Abstract: Certain aspects of the present disclosure provide techniques for measuring interference observed at a CoMP UE caused by neighbor base stations transmitting reference signals.
    Type: Application
    Filed: August 23, 2012
    Publication date: February 28, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tingfang Ji, Peter Gaal, Stefan Geirhofer, Yichao Huang
  • Publication number: 20130051265
    Abstract: Certain aspects of the present disclosure provide techniques that may help improve performance in Coordinated Multi-Point networks that utilize coordinated transmissions, such as coordinated beamforming (CBF).
    Type: Application
    Filed: August 23, 2012
    Publication date: February 28, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Alan Barbieri, Tingfang Ji, Peter Gaal
  • Publication number: 20130051322
    Abstract: Various aspects of the present disclosure are directed to periodic over-the-air channel state information (CSI) reporting to serving cells and one or more non-serving cells via a control channel multi-point attachment. The channel state information report may be transmitted based on information indicating how to transmit the channel state information report to the non-serving cell. The information indicating how to transmit the channel state information report may be provided by the serving eNodeB. The information may include a periodicity, offset parameters, timing advance commands, power control commands, and/or an aperiodic report request.
    Type: Application
    Filed: August 22, 2012
    Publication date: February 28, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Alan Barbieri, Tingfang Ji, Hao Xu, Wanshi Chen
  • Publication number: 20130039171
    Abstract: Techniques are provided for frequency spectrum sharing that allows secondary operators to access a frequency band of a primary operator without interfering with the primary operator's use of the band, while ensuring service continuity for devices of the secondary operators. For example, there is provided a method that may involve identifying an outage on a first channel of a plurality of channels of a spectrum, wherein each of the plurality of channels is allocated to one of a plurality of operators. The method may involve migrating all mobile stations in communication over the first channel of the plurality of channels to at least one other channel of the plurality of channels during the outage.
    Type: Application
    Filed: May 10, 2012
    Publication date: February 14, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Peter Gaal, Alan Barbieri, Rajat Prakash, Yi Huang
  • Publication number: 20130033989
    Abstract: Downlink rate adaptation in wireless communication systems are disclosed in which a UE reports RIs for both interference-free and interference-limited subframes. In general, the RI for the interference-free subframes will be higher than the RI reported for the interference-limited subframes. However, an eNB selects an RI and a transmission rate for interference-limited subframes based on what the UE can sustain instead of based only on the RI reported by the UE.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Vikas Jain, Muruganandam Jayabalan, Tao Luo, Saikiran Nudurupati, Fang Chen
  • Publication number: 20130010687
    Abstract: A method of wireless communication is provided which includes communicating with a base station on a first channel and tuning to a second channel concurrently with the base station tuning to a second or third channel. The method also includes measuring interference on the second channel and re-tuning to the first channel concurrently with the base station re-tuning to the first channel. The method further includes reporting channel quality, based on the interference, to the base station to enable channel selection.
    Type: Application
    Filed: June 27, 2012
    Publication date: January 10, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Peter Gaal, Alan Barbieri
  • Publication number: 20130003533
    Abstract: A method of wireless communication is provided. The method includes transmitting a message to notify a base station of a radio link failure on a current channel, retuning to a pre-agreed channel, and setting a time period to synchronize with the base station on the pre-agreed channel.
    Type: Application
    Filed: June 27, 2012
    Publication date: January 3, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Alan Barbieri, Peter Gaal