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).

  • Patent number: 9515773
    Abstract: According to certain aspects, techniques for periodically reporting channel state information (CSI) on protected and unprotected resources are provided. The protected resources may include resources in which transmissions in a first cell are protected by restricting transmissions in a second cell.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 6, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tingfang Ji, Hao Xu, Tao Luo, Durga Prasad Malladi
  • Patent number: 9516686
    Abstract: Techniques for establishing and maintaining peer-to-peer (P2P) communication are described. In an aspect, P2P communication on an unlicensed spectrum may be established and maintained with network assistance. In one design, a user equipment (UE) may communicate with a wide area network (WAN) to establish P2P communication with at least one other UE on a first frequency band that is not licensed to the WAN. For example, the UE may receive an assignment of at least one frequency channel in the first frequency band for P2P communication. The UE may then communicate peer-to-peer with the other UE(s) on the at least one frequency channel. The UE may also communicate with the WAN to maintain P2P communication with the other UE(s), e.g., to switch to another frequency channel if necessary.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: December 6, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Naga Bhushan, Ravi Palanki, Peter Gaal
  • Patent number: 9503924
    Abstract: According to example embodiments, a method for wireless communications by a user equipment (UE) is included. The method generally includes performing channel estimation at a plurality of frequency locations based on reference signals (RS) transmitted from at least one transmission point, computing at least one channel feedback metric for each frequency location, and transmitting the channel feedback metrics to the transmission point. According to certain aspects, a method for wireless communications by a base station (BS) is provided. The BS may receive channel feedback metrics from a UE, calculated at a plurality of frequency locations based on RSs transmitted from the BS. The BS may perform interpolation to determine values for channel feedback metrics for frequency locations between frequency locations of the received channel feedback metrics.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: November 22, 2016
    Assignee: QUALCOMM INCORPORATED
    Inventors: Stefan Geirhofer, Peter Gaal, Naga Bhushan, Alan Barbieri
  • Patent number: 9497751
    Abstract: Network identifiers used for control information are typically correlated in time. This correlation in time may be leveraged to reduce the control space searched, and thus the number of blind decodes performed by a UE during blind decoding of neighbor cell control information. An apparatus that exploits this correlation in time decodes a control channel transmitted by a neighbor cell to obtain a current network identifier used to perform an operation on the control channel transmission, compares the current network identifier with a set of network identifiers obtained from previously decoded control channels transmitted from the neighbor cell, and determines if the decoded control channel is valid based at least in part on the comparison. The set of network identifiers may be a list of network identifiers, or a range of network identifiers. The set of network identifiers may further include aggregation level information and frequency of occurrence information.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: November 15, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tao Luo
  • Publication number: 20160269144
    Abstract: Real-time selection of interference cancellation schemes based on transmission parameters and amount of resource overlap between the desired payload and the interfering payload. Codeword level interference cancellation may be performed where the signal quality of the interfering signal indicates that the interfering payload will be decoded correctly. When performed, codeword level interference cancellation may be monitored to determine if decoding the interfering payload is converging. Other interference cancellation schemes may be selected based on the signal quality of the interfering signal or non-converging decode of the interfering payload. The number of iterations for iterative decoding in codeword level interference cancellation may be dynamically selected. The decoder output (e.g., soft bits) may be used to perform interference cancellations before the decoder is fully converged.
    Type: Application
    Filed: May 18, 2016
    Publication date: September 15, 2016
    Inventors: Alan Barbieri, Tao Luo
  • Publication number: 20160150528
    Abstract: Rank indicator and channel quality indicator (CQI) estimation and reporting functionalities are discussed with regard to heterogeneous networks to reduce the number of inconsistent CQI estimates transmitted to an evolved node B (eNB), where the CQI is defined as inconsistent when the rank indicator, on which the CQI is conditioned, is from a different subframe type than the subframe on which the CQI is to be estimated.
    Type: Application
    Filed: January 28, 2016
    Publication date: May 26, 2016
    Inventors: Alan Barbieri, Tingfang Ji
  • Patent number: 9306638
    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: Grant
    Filed: August 23, 2012
    Date of Patent: April 5, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tingfang Ji, Osok Song
  • Patent number: 9307431
    Abstract: Rank indicator and channel quality indicator (CQI) estimation and reporting functionalities are discussed with regard to heterogeneous networks to reduce the number of inconsistent CQI estimates transmitted to an evolved node B (eNB), where the CQI is defined as inconsistent when the rank indicator, on which the CQI is conditioned, is from a different subframe type than the subframe on which the CQI is to be estimated.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: April 5, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tingfang Ji
  • Patent number: 9294240
    Abstract: A method of wireless communication includes receiving by a single RF receiver of a user equipment (UE) a first portion of a downlink transmission from an eNode B (eNodeB) on a downlink primary carrier during at least one periodic subframe of the downlink primary carrier. The method also includes receiving by the single RF receiver a second portion of the downlink transmission from the eNodeB on the secondary downlink carrier. The reception occurs during a periodic sequence of subframes of the secondary downlink carrier following the at least one periodic subframe of the downlink primary carrier and before a second periodic subframe of the downlink primary carrier.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: March 22, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Peter Gaal
  • Patent number: 9288004
    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: Grant
    Filed: August 23, 2013
    Date of Patent: March 15, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Hao Xu, Madhavan Srinivasan Vajapeyam, Aleksandar Damnjanovic
  • Patent number: 9226288
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which an apparatus may determine broadcast channel scheduling information for one or more broadcasts of a payload by a broadcast channel associated with a first base station based on one or more broadcast channel interference coordination schemes, wherein reception of the broadcast channel associated with the first base station is interfered at least in part based on one or more transmissions from a second base station, and receive the payload based on the determined broadcast channel scheduling information.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 29, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tingfang Ji, Tao Luo, Madhavan Srinivasan Vajapeyam, Osok Song, Aleksandar Damnjanovic, Yongbin Wei, Parag Arun Agashe, Durga Prasad Malladi
  • Patent number: 9219571
    Abstract: According to certain aspects, techniques for aperiodically reporting channel state information (CSI) on protected and unprotected resources are provided. The protected resources may include resources in which transmissions in a first cell are protected by restricting transmissions in a second cell. According to certain aspects, a request for channel quality indicator (CQI) may be sent in a first subframe, CQI may be measured for a second subframe having a first offset from the first subframe, and a corresponding CQI report sent in a third subframe having a second offset from the first subframe.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 22, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tingfang Ji, Hao Xu
  • Patent number: 9198073
    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: Grant
    Filed: July 16, 2013
    Date of Patent: November 24, 2015
    Assignee: QUALCOMM INCORPORATED
    Inventors: Alan Barbieri, Madhavan Srinivasan Vajapeyam, Tingfang Ji
  • Patent number: 9173121
    Abstract: Methods and apparatuses are provided that include determining resources over which to measure signals from a base station. One or more parameters related to a resource restriction pattern can be provided to the device for measuring signals over indicated resources. The resource restricted pattern can correspond to a bitmap where each bit relates to a time period over which signals can be transmitted by the base station, and the bit can specify whether a signal received over the resource should be measured. The resource restriction pattern can correspond to a set or protected resources negotiated using a resource partitioning scheme.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: October 27, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Tingfang Ji, Aleksandar Damnjanovic, Juan Montojo, Alan Barbieri
  • Patent number: 9144071
    Abstract: Methods and apparatus for effectively allocating resource partitioning information (RPI) in a wireless communication network are provided. For certain aspects, a method for wireless communications generally includes receiving, at a first base station, such as a pico enhanced Node B (eNB), resource partitioning information (RPI) from at least one second base station, such as a macro eNB; determining one or more resources indicated in the RPI actually usable by the first base station; and sending, from the first base station to the at least one second base station, an indication of the actually usable resources.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: September 22, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ajay Gupta, Osok Song, Madhavan Srinivasan Vajapeyam, Alan Barbieri, Rajat Prakash
  • Patent number: 9025479
    Abstract: A method of wireless communication is presented. The method includes signaling a first number of channel state information-reference signal (CSI-RS) ports corresponding to resource elements (REs) and a second number of virtual antenna ports, the second number being less than or equal to the first number. The method also includes transmitting CSI-RS on each virtual antenna port, the CSI-RS mapped to at least a portion of the REs.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 5, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Gaal, Tingfang Ji, Alan Barbieri
  • Patent number: 9008582
    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: Grant
    Filed: August 23, 2012
    Date of Patent: April 14, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Tingfang Ji, Peter Gaal, Stefan Geirhofer, Yichao Huang
  • Publication number: 20150098427
    Abstract: 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 is disclosed. 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: December 11, 2014
    Publication date: April 9, 2015
    Inventors: Alan BARBIERI, Tingfang JI, Hao XU, Wanshi CHEN
  • Publication number: 20150098421
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus configures a first downlink (DL) control channel for a user equipment (UE) being served by the first transmission point, the configuration facilitating decoding of the first DL control channel by at least one UE being served by a second transmission point, and transmits the first DL control channel.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 9, 2015
    Inventors: Alan BARBIERI, Tao LUO
  • Patent number: 8977274
    Abstract: There lies a challenge to develop a technique of accurately and efficiently determining an available communication channel. In accordance with some embodiments disclosed herein, techniques for sensing a primary user of a particular communication channel are performed more efficiently. In some implementations, a geo-location of a communication device is combined with a sensing algorithm in order to more efficiently perform spectrum sensing. In some implementations, a geo-location and an accuracy determination may be used to determine all required sample regions in order to ensure that a primary user is not present in a particular location.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: March 10, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmed K. Sadek, Rahul Tandra, Alan Barbieri, Ravi Palanki