Patents by Inventor Pengfei Xia

Pengfei Xia 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: 20210297139
    Abstract: Embodiments of the present disclosure provide an apparatus and method for beam failure recovery between a UE and a base station operating in a discontinuous reception (DRX) mode. In an embodiment, the UE receives a frame from a base station for determining a radio link quality of a physical downlink control channel (PDCCH). The UE determines whether the frame is received only during the DRX ON state of the DRX mode and that the radio link quality of the PDCCH is less than an acceptable quality threshold. In response, the UE transmits a recovery message to the base station indicating a change to a communication beam used to receive the frame.
    Type: Application
    Filed: January 26, 2019
    Publication date: September 23, 2021
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Publication number: 20210289448
    Abstract: Methods and apparatuses are described herein for adapting clear channel assessment (CCA) thresholds with or without Transmit Power Control (TPC) are disclosed. An IEEE 802.11 station (STA) may dynamically calculate a STA specific transmit power control (TPC) value and a STA specific clear channel assessment (CCA) value based on a target TPC parameter and a target CCA parameter. The target TPC parameter and the target CCA parameter may be received from an IEEE 802.11 cluster head configured to control TPC and CCA for a plurality of STAs associated with the BSS. The target TPC parameter and the target CCA parameter also may be related. The STA may then determine whether a carrier sense multiple access (CSMA) wireless medium of a wireless local area network (WLAN) basic service set (BSS) is occupied or idle based on the STA specific CCA value.
    Type: Application
    Filed: June 1, 2021
    Publication date: September 16, 2021
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Pengfei Xia, Xiaofei Wang, Hanqing Lou, Monisha Ghosh, Robert L. Olesen, Nirav B. Shah, Frank La Sita
  • Patent number: 11122444
    Abstract: A method, apparatus, system, and computer readable medium may be used to perform beamforming. The method may include a first communication device sending a first plurality of beamforming training frames to a second communication device using a first beamforming weight vector; the first communication device receiving from the second communication device a second beamforming weight vector; and the first communication device sending a second plurality of beamforming training frames to the second communication device using the second beamforming weight vector. The apparatus, method, system, and computer readable media may use spatial diversity with beam switching, spatial diversity with a single beam, weighted multipath beamforming training, single user spatial multiplexing, and beamforming training for beam division multiple access (BDMA).
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: September 14, 2021
    Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hanqing Lou, Pengfei Xia, Monisha Ghosh, Oghenekome Oteri, Robert L. Olesen
  • Patent number: 11082176
    Abstract: Embodiments of this disclosure provide techniques for receiving reference signals by a user equipment (UE) from a base station in a downlink channel, as well as transmitting a linear combination index from the UE to the base station. In particular, the linear combination index identifies a combination of beams selected from a set of beams in accordance with the RS.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: August 3, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Bin Liu, Pengfei Xia
  • Patent number: 11070345
    Abstract: A method performed by a base station for measuring a channel state information reference signal (CSI-RS) for non-codebook based uplink (UL) transmission. The method includes transmitting information relating to a sounding reference signal (SRS) resource set for the non-codebook based UL transmission, information relating to a CSI-RS resource, a CSI-RS over the CSI-RS resource, and information relating to CSI-RS measurement restriction for measurement of the CSI-RS according to the CSI-RS measurement restriction. The measurement is for determining precoding information for the SRS resource set. The method includes receiving the SRS resource set, measuring the SRS resource set, and determining one or more SRS resources within the SRS resource set to be used for precoding the UL transmission. The method further includes transmitting a downlink control information (DCI) that indicates the SRS resources within the SRS resource set to be used for precoding the UL transmission, and receiving the UL transmission.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: July 20, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Publication number: 20210175935
    Abstract: A computer-implemented method for operating an access node includes receiving from a user equipment (UE), information on a maximum number of multiple input multiple output (MIMO) layers supported by the UE for an operation bandwidth within a system bandwidth operated by the access node, scheduling for the UE, a bandwidth in accordance with the maximum number of MIMO layers supported by the UE, sending to the UE, allocation information related to the bandwidth, and communicating with the UE, a data frame on the bandwidth.
    Type: Application
    Filed: February 21, 2019
    Publication date: June 10, 2021
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Publication number: 20210168788
    Abstract: When spatial quasi co-location is established between component carriers, beam management, e.g., beam configuration or reference signal configuration, of one component carrier may be performed based at least in part on beam management information of the other. Information specifying that component carriers or reference signals cross component carriers are spatially quasi co-located, or information about a SQCL group including spatially quasi co-located carriers, may be transmitted to a UE, e.g., using broadcast signaling, radio resource control (RRC) signaling, a media access control-control element (MAC-CE), downlink control information (DCI) signaling, or a combination thereof.
    Type: Application
    Filed: February 16, 2021
    Publication date: June 3, 2021
    Inventors: Bin Liu, Pengfei Xia
  • Patent number: 11026187
    Abstract: Methods and apparatuses are described herein for determining a transmit power based on clear channel assessment (CCA) thresholds. A station (STA) associated with a first Basic Service Set (BSS) may receive, from an access point (AP) associated with the first BSS, a clear channel assessment (CCA) value for a group of STAs associated with a second BSS. The CCA value may indicate a minimum CCA threshold for a packet received from the second BSS. The STA may then determine, based on the CCA value, a STA specific CCA parameter and a target CCA parameter. The target CCA parameter may be greater than or equal to the STA specific CCA parameter. Based on the STA specific CCA parameter and the target CCA parameter, the STA may determine a target transmit power control (TPC) parameter of the STA, wherein the sum of target TPC parameter and target CCA parameter is constant.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: June 1, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Pengfei Xia, Xiaofei Wang, Hanqing Lou, Monisha Ghosh, Robert L Olesen, Nirav B. Shah, Frank La Sita
  • Patent number: 11012210
    Abstract: An embodiment method defines a demodulation reference signal (DMRS) pattern for transmitting DMRSs for rank 3 or rank 4 transmissions. The DMRS pattern specifies 12 REs in total per physical resource block (PRB) for carrying DMRSs on three or four antenna ports in antenna ports 7-14 for rank 3 or rank 4 transmissions. DMRS settings for transmitting DMRS according to the DMRS pattern may be specified using a downlink control information table.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: May 18, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu
  • Patent number: 11013034
    Abstract: A method for operating an access node includes receiving a first random access preamble in a first random access resource, wherein the first random access preamble and the first random access resource at least partially identifies a first beam selected by a user equipment (UE), and wherein the first random access resource is one of a plurality of random access resources assigned to the UE, and determining that first additional information associated with the first beam is needed, and based thereon, sending a first message responsive to the first random access preamble, the first message including a first information set to request the additional information associated with the first beam, and receiving a second message including the first additional information associated with the first beam.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: May 18, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20210135735
    Abstract: The disclosure relates to technology for assigning resources to user equipment for a beam failure recovery by a base station. The base station identifies a beam failure random access channel (BRACH) resource holding beam correspondence with a synchronization signal (SS) block resource covering the user equipment, and assigns the user equipment one or more BRACH preambles for each BRACH resource assigned to the user equipment, excluding the BRACH resource holding beam correspondence with the SS block resource covering the user equipment.
    Type: Application
    Filed: November 18, 2020
    Publication date: May 6, 2021
    Applicant: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Publication number: 20210120539
    Abstract: A method and apparatus may be used to support coordinated and cooperative sectorized transmissions. Power control and clear channel assessment for sectorized transmissions may be used, along with sectorized beacon and associated procedures. Transmissions in a network may be protected by a first access point (AP) sending an omni-directional transmission and a beamformed or sectorized transmission to a station (STA), an overlapping basic service set (OBSS) confirming a spatially orthogonal (SO) condition based on the omni-directional transmission, and a second AP monitoring the omni-directional transmission and confirming the SO condition. The STA may be configured to receive a request-to-send (RTS) frame indicating data is available for transmission, and transmit a cooperative sectorized (CS) clear-to-send (CTS) frame indicating an ability for multiple AP reception.
    Type: Application
    Filed: December 29, 2020
    Publication date: April 22, 2021
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Pengfei Xia, Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Monisha Ghosh, Robert L. Olesen
  • Patent number: 10965417
    Abstract: An embodiment method defines a demodulation reference signal (DMRS) pattern for transmitting DMRSs for rank 3 or rank 4 transmissions. The DMRS pattern specifies 12 REs in total per physical resource block (PRB) for carrying DMRSs on three or four antenna ports in antenna ports 7-14 for rank 3 or rank 4 transmissions. DMRS settings for transmitting DMRS according to the DMRS pattern may be specified using a downlink control information table.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: March 30, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu
  • Publication number: 20210076314
    Abstract: A cell search method and a communication apparatus. The method comprises: before performing cell search, a terminal device can determine, in combination with the historical access information of other terminal device, whether a cell exists at the position, and adjusts, according to the determination result, the value of the search parameter for cell search, for example, if a cell exists, the search is accelerated by adjusting the search parameter; if no cell exists, the search may not be performed or the search parameter may not be adjusted, so as to reduce unnecessary cell search performed by the terminal device, so that the power consumption of the terminal device can be reduced.
    Type: Application
    Filed: April 12, 2019
    Publication date: March 11, 2021
    Inventors: Qi Wang, Ping Fang, Yong Cheng, Pengfei Xia, Wei Huang
  • Publication number: 20210058101
    Abstract: A wireless transmit/receive unit (WTRU) may receive a constellation symbol that includes indications that each are associated with a respective WTRU of a plurality of WTRUs. The WTRU may determine that a first weight associated with a first indication of the indications is different than a second weight associated with a second indication of the indications. The indications may comprise indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).
    Type: Application
    Filed: November 10, 2020
    Publication date: February 25, 2021
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Yuan Sheng Jin, Pengfei Xia, Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Robert L. Olesen
  • Patent number: 10931514
    Abstract: A method for operating an access node includes generating a configuration message including information specifying a set of reference signals of a first reference signal type and a set of reference signals of a second reference signal type used to identify a new beam, and information specifying random access channel resources allocated for transmitting preamble sequences, wherein each random access channel resource is associated with a reference signal of the first reference signal type, sending, to one or more user equipments (UEs), the configuration message, receiving, from a UE, a preamble sequence on one of the random access channel resources, and determining an identity of the UE in accordance with the preamble sequence and the one of the random access channel resources.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: February 23, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu
  • Patent number: 10925062
    Abstract: When spatial quasi co-location is established between component carriers, beam management, e.g., beam configuration or reference signal configuration, of one component carrier may be performed based at least in part on beam management information of the other. Information specifying that component carriers or reference signals cross component carriers are spatially quasi co-located, or information about a SQCL group including spatially quasi co-located carriers, may be transmitted to a UE, e.g., using broadcast signaling, radio resource control (RRC) signaling, a media access control-control element (MAC-CE), downlink control information (DCI) signaling, or a combination thereof.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: February 16, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Bin Liu, Pengfei Xia
  • Publication number: 20210029570
    Abstract: A method for reporting beam information includes setting, by a user equipment (UE), a report type of a beam information report, wherein the beam information report includes beam indices of communications beams being reported, a reference beam quality measurement of one of the communications beams reported, and a report type field conveying the report type, and sending, by the UE to an access node, the beam information report.
    Type: Application
    Filed: August 7, 2020
    Publication date: January 28, 2021
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20210021323
    Abstract: The disclosure relates to technology for identifying a user equipment beam index in a base station. The base station indicates one or more resources assigned to the user equipment within a beam failure random access channel (BRACH) resource, and transmits one or more synchronization signal block resources and one or more new beam identification reference signal resources to the user equipment. The base station then receives one of the resources from a group of the one or more resources within the BRACH resource assigned to the user equipment corresponding to the BRACH resource, and identifies a preferred beam index of the user equipment based on information in the BRACH resource and the received one of the resources.
    Type: Application
    Filed: August 14, 2020
    Publication date: January 21, 2021
    Applicant: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Patent number: 10897287
    Abstract: A method includes inserting a first reference signal and a plurality of bit fields on a first channel, to produce a first signal, where the plurality of bit fields includes a first bit field indicating whether a second reference signal is transmitted on a second channel, a second bit field indicating whether the first reference signal has the same precoding as the second reference signal, a third bit field indicating whether precoding of the first reference signal is similar to precoding of the second reference signal, or a fourth bit field indicating transmission precoding differences between the first reference signal and the second reference signal. The method also includes performing precoding on the first signal, to produce a first transmission signal, performing precoding on the second channel, to produce a second transmission signal, transmitting, to a receiver, the first transmission signal and transmitting, to the receiver, the second transmission signal.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: January 19, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu, Richard Stirling-Gallacher