Patents by Inventor Stefan Geirhofer

Stefan Geirhofer 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: 10674407
    Abstract: Methods and apparatus for supporting adaptive resource negotiation between evolved node Bs (eNBs) for enhanced inter-cell interference coordination (eICIC) are provided. This resource negotiation may occur via a network backhaul between the eNBs or, in some cases, using over-the-air messages (OAMs). For certain aspects, a first eNB may propose its adaptive resource partitioning information (ARPI) to a second eNB, where the second eNB may accept or reject the proposed resource partitioning. If the second eNB accepts the proposed partitioning, the second eNB may schedule resources, such as subframes, based on the accepted partitioning.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: June 2, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Osok Song, Aleksandar Damnjanovic, Tingfang Ji, Parag Arun Agashe, Jaber Mohammad Borran, Madhavan Srinivasan Vajapeyam, Stefan Geirhofer
  • Patent number: 10674453
    Abstract: Techniques for performing path loss (PL) compensation in coordinated multipoint (CoMP) systems are provided. A method for wireless communications by a user equipment (UE) is provided. The method generally includes selecting, from a plurality of transmission points involved in uplink (UL) coordinated multipoint (CoMP) operations with the UE, a transmission point to associate with for path loss (PL) compensation, and adjusting power of one or more transmissions based on path loss measured based on the selected transmission point.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: June 2, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Hao Xu, Peter Gaal, Wanshi Chen, Stefan Geirhofer, Madhavan Srinivasan Vajapeyam
  • Publication number: 20200084774
    Abstract: Techniques for supporting peer-to-peer (P2P) communication in a wide area network (WAN) are disclosed. In an aspect, interference coordination between P2P devices engaged in P2P communication and WAN devices engaged in WAN communication may be performed based on a network-controlled architecture. For the network-controlled architecture, P2P devices may detect other P2P devices and/or WAN devices and may send measurements (e.g., for pathloss, interference, etc.) for the detected devices to the WAN (e.g., serving base stations). The WAN may perform resource partitioning and/or association for the P2P devices based on the measurements. Association may include selection of P2P communication or WAN communication for a given P2P device. Resource partitioning may include allocation of resources to a group of P2P devices for P2P communication.
    Type: Application
    Filed: November 14, 2019
    Publication date: March 12, 2020
    Inventors: Stefan GEIRHOFER, Naga BHUSHAN, Ravi PALANKI, Jaber BORRAN, Aleksandar DAMNJANOVIC
  • Patent number: 10574306
    Abstract: Aspects of the present disclosure relate to techniques that may be utilized in networks with base stations and/or mobile devices that use large number of antennas or multi-dimensional arrays of antennas.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: February 25, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Hao Xu, Stefan Geirhofer, Peter Gaal, Wanshi Chen, Yongbin Wei
  • Patent number: 10517098
    Abstract: Techniques for supporting peer-to-peer (P2P) communication in a wide area network (WAN) are disclosed. In an aspect, interference coordination between P2P devices engaged in P2P communication and WAN devices engaged in WAN communication may be performed based on a network-controlled architecture. For the network-controlled architecture, P2P devices may detect other P2P devices and/or WAN devices and may send measurements (e.g., for pathloss, interference, etc.) for the detected devices to the WAN (e.g., serving base stations). The WAN may perform resource partitioning and/or association for the P2P devices based on the measurements. Association may include selection of P2P communication or WAN communication for a given P2P device. Resource partitioning may include allocation of resources to a group of P2P devices for P2P communication.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: December 24, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Naga Bhushan, Ravi Palanki, Jaber Mohammad Borran, Aleksandar Damnjanovic
  • Patent number: 10439782
    Abstract: Certain aspects of the present disclosure provide techniques for implicitly linking aperiodic channel state information (A-CSI) reports to CSI-reference signal (CSI-RS) resources. In an aspect, the UE may be instructed to report on specific CSI-RS resource(s) via explicit signaling in the UE grant. Other aspects disclose techniques for implicit CSI-RS resource selection by the UE that require fewer signaling resources. Instead of explicitly signaling CSI-RS resources to the UE, the UE may implicitly select CSI-RS resource for CSI feedback reporting based on information known to the UE, e.g. a subframe on which a reporting request is received. This may reduce the impact of the additional signaling in the UE grant.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 8, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Tao Luo, Wanshi Chen, Peter Gaal, Hao Xu, Kapil Bhattad, Tingfang Ji
  • Patent number: 10420112
    Abstract: Techniques for determining resources to use for peer-to-peer (P2P) communication are disclosed. In an aspect, a network entity may receive feedback information (e.g., resource usage information and/or channel state information) from P2P devices and may perform resource partitioning based on the feedback information to allocate some of the available resources for P2P communication. The allocated resources may observe little or no interference from devices engaged in wide area network (WAN) communication. In another aspect, P2P groups may perform resource negotiation via a WAN connection (e.g., with little or no involvement by the WAN) to assign the allocated resources to different P2P groups. In yet another aspect, a device may autonomously determine whether to communicate with another device directly or via a WAN, e.g., whether to initiate P2P communication with another device and whether to terminate P2P communication.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: September 17, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Naga Bhushan, Ravi Palanki, Aleksandar Damnjanovic, Parag Arun Agashe
  • Patent number: 10284273
    Abstract: A method for channel state information (CSI) reporting by a wireless communication device is described. The method includes determining a codebook for a CSI report corresponding to four transmit antenna (4Tx) transmissions from a base station. The codebook has a dual codebook structure. The method also includes generating the CSI report using the codebook. The method further includes transmitting the CSI report to a base station.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: May 7, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Peter Gaal, Wanshi Chen, Hao Xu
  • Patent number: 10263741
    Abstract: A method of wireless communications identifies a first virtual cell identity. The method also includes determining one or more virtual cells based on the identified first virtual cell identity. The method further includes processing one channel based on the determination.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: April 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Tao Luo, Stefan Geirhofer, Peter Gaal, Hao Xu
  • Patent number: 10230517
    Abstract: A method of wireless communication at a serving base station identifies a potential interference condition based on an uplink/downlink configuration mismatch. The method includes signaling, to a neighbor base station, to restrict transmissions based on the identified potential interference condition. The transmissions may be restricted by beamforming the transmissions into a different direction and/or blocking transmissions on a frequency. The signaling prompts the neighbor base station to restrict downlink transmissions that will potentially interfere with uplink control channel transmissions received at the serving base station, or to restrict uplink transmissions, intended for the neighbor base station, that will potentially interfere with downlink control channel transmissions from the serving base station.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: March 12, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Hao Xu, Wanshi Chen, Peter Gaal, Stefan Geirhofer
  • Patent number: 10123313
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. In an aspect, the apparatus may configure at least a first resource set and a second resource set for a control channel. The first and second resource sets may be configured with a common reference signal configuration. The apparatus also configures first rate-matching parameters for the first resource set and second rate-matching parameters for the second resource set. Then, the apparatus transmits the first rate-matching parameters and the second rate-matching parameters and transmits the control channel using the first resource set and the second resource set.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: November 6, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Stefan Geirhofer, Peter Gaal, Hao Xu, Tao Luo
  • Patent number: 10098109
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. In an aspect, the apparatus may configure at least a first resource set and a second resource set for a control channel. The first and second resource sets may be configured with a common reference signal configuration. The apparatus also configures first rate-matching parameters for the first resource set and second rate-matching parameters for the second resource set. Then, the apparatus transmits the first rate-matching parameters and the second rate-matching parameters and transmits the control channel using the first resource set and the second resource set.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: October 9, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Stefan Geirhofer, Peter Gaal, Hao Xu, Tao Luo
  • Publication number: 20180255482
    Abstract: Methods and apparatus for supporting adaptive resource negotiation between evolved node Bs (eNBs) for enhanced inter-cell interference coordination (eICIC) are provided. This resource negotiation may occur via a network backhaul between the eNBs or, in some cases, using over-the-air messages (OAMs). For certain aspects, a first eNB may propose its adaptive resource partitioning information (ARPI) to a second eNB, where the second eNB may accept or reject the proposed resource partitioning. If the second eNB accepts the proposed partitioning, the second eNB may schedule resources, such as subframes, based on the accepted partitioning.
    Type: Application
    Filed: May 2, 2018
    Publication date: September 6, 2018
    Inventors: Osok SONG, Aleksandar DAMNJANOVIC, Tingfang JI, Parag Arun AGASHE, Jaber Mohammad BORRAN, Madhavan Srinivasan VAJAPEYAM, Stefan GEIRHOFER
  • Publication number: 20180206219
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which a cell identifier is selected based on one or more properties associated with received downlink control information (DCI), where the properties may not be exclusively associated with determining a cell identifier. The cell identifier may be selected from a plurality of cell identifiers received through radio resource control signaling. The properties of the DCI may include a type of download control channel, a type of subframe and a type of DCI format used to provide the DCI.
    Type: Application
    Filed: March 5, 2018
    Publication date: July 19, 2018
    Inventors: Wanshi CHEN, Stefan GEIRHOFER, Peter GAAL, Tao LUO, Hao XU
  • Publication number: 20180184411
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which a cell identifier is selected based on one or more properties associated with received downlink control information (DCI), where the properties may not be exclusively associated with determining a cell identifier. The cell identifier may be selected from a plurality of cell identifiers received through radio resource control signaling. The properties of the DCI may include a type of download control channel, a type of subframe and a type of DCI format used to provide the DCI.
    Type: Application
    Filed: February 21, 2018
    Publication date: June 28, 2018
    Inventors: Wanshi CHEN, Stefan GEIRHOFER, Peter GAAL, Tao LUO, Hao XU
  • Publication number: 20180145738
    Abstract: A method for providing multi-hypothesis channel quality indicator (MH-CQI) feedback is described. Hypotheses corresponding to rank indicator (RI) and precoding matrix indicator (PMI) assumptions associated with a dominant interferer are selected. Multi-hypothesis channel quality indicator (MH-CQI) values based on the selected hypotheses are generated. The multi-hypothesis channel quality indicator (MH-CQI) values are encoded. The multi-hypothesis channel quality indicator (MH-CQI) values are sent as feedback.
    Type: Application
    Filed: January 17, 2018
    Publication date: May 24, 2018
    Inventors: Stefan Geirhofer, Peter Gaal, Tingfang Ji, Alan Barbieri
  • Patent number: 9961579
    Abstract: Techniques for reporting channel state information (CSI) based on scalable channel feedback are described. A user equipment (UE) may receive data transmission from one or more cells among a plurality of cells and may report CSI for each of the plurality of cells. For scalable channel feedback, the UE may report CSI with different granularity for different cells. The granularity of feedback for each cell may be selected based on the quality of a communication channel between the cell and the UE, which may be determined based on a long-term channel gain for the cell. The granularity of feedback may be defined by a subband size, a reporting interval, granularity of quantization of CSI, etc. The UE may report CSI for each cell based on the granularity of feedback for the cell. The UE may receive data transmission sent by at least one cell based on the reported CSI.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: May 1, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Alexei Yurievitch Gorokhov, Siddhartha Mallik
  • Patent number: 9936494
    Abstract: Methods and apparatus are provided for assigning interference measurement resources. A method includes receiving at least one identifier, which determines, at least in part, at least one interference measurement resource that partially overlaps with another at least one interference measurement resource. The at least one interference measurement resource comprises a number of resource elements out of a set of resource elements. The method also includes measuring interference based at least in part on the at least one interference measurement resource.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: April 3, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Peter Gaal, Yongbin Wei
  • Patent number: 9924498
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which a cell identifier is selected based on one or more properties associated with received downlink control information (DCI), where the properties may not be exclusively associated with determining a cell identifier. The cell identifier may be selected from a plurality of cell identifiers received through radio resource control signaling. The properties of the DCI may include a type of download control channel, a type of subframe and a type of DCI format used to provide the DCI.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: March 20, 2018
    Inventors: Wanshi Chen, Stefan Geirhofer, Peter Gaal, Tao Luo, Hao Xu
  • Patent number: 9917629
    Abstract: A method for providing multi-hypothesis channel quality indicator (MH-CQI) feedback is described. Hypotheses corresponding to rank indicator (RI) and precoding matrix indicator (PMI) assumptions associated with a dominant interferer are selected. Multi-hypothesis channel quality indicator (MH-CQI) values based on the selected hypotheses are generated. The multi-hypothesis channel quality indicator (MH-CQI) values are encoded. The multi-hypothesis channel quality indicator (MH-CQI) values are sent as feedback.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: March 13, 2018
    Assignee: QUALCOMM Incoroporated
    Inventors: Stefan Geirhofer, Peter Gaal, Tingfang Ji, Alan Barbieri