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).

  • Patent number: 10631252
    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: February 13, 2019
    Date of Patent: April 21, 2020
    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
  • Publication number: 20200119859
    Abstract: Systems, methods, and instrumentalities are provided to implement a method of communicating a feedback in a wireless local area network (WLAN). A WLAN device may receive a data frame with a hybrid automatic repeat request (HARQ) data indicator in a frame header. The WLAN device may send an acknowledgement frame when the data frame is correctly received and decoded. The WLAN device may send a negative acknowledgement frame when the data frame is not correctly received and decoded.
    Type: Application
    Filed: December 13, 2019
    Publication date: April 16, 2020
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Guodong Zhang, Robert L. Olesen, Hanqing Lou, Monisha Ghosh, Pengfei Xia, Nirav B. Shah, Oghenekome Oteri
  • Patent number: 10601492
    Abstract: Aspects of this disclosure provide techniques for detecting and recovering from beam-failure events. In some embodiments, motion sensor information generated by motion sensors on a UE is used to detect, predict, and/or recover from a beam failure event that results, or would otherwise result, from movement of the UE. The motion sensor information may be used to adjust a current beam direction used by the UE to transmit or receive a signal, or to determine a recommendation for adjusting a current beam direction of the base station. The motion sensor information may be generated by any sensor that detects a movement of the UE, such as a gyroscope, an accelerometer, a magnetometer, a global positioning system (GPS) sensor, a global navigation satellite system (GNSS) sensor, or any other device that detects a change in position/orientation of the UE.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: March 24, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu, Nathan Edward Tenny
  • Patent number: 10581507
    Abstract: A method and an apparatus for selecting beams for non-codebook based uplink multiple-input and multiple-output are disclosed. In an embodiment, a method implemented by a user equipment (UE) includes receiving an allocation of at least one sounding reference signal (SRS) resource in an uplink subframe from a transmission and reception point (TRP) for a first set of uplink transmission beams, transmitting precoded SRSs in the at least one SRS resource to the TRP, wherein the precoded SRSs are precoded with UE-selected precoders and at least one rank and receiving an identification of two or more precoders for a second set of uplink transmission beams, wherein the second set of uplink transmission beams is selected from the first set of uplink transmission beams, and wherein the two or more precoders are based on the precoded SRSs.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: March 3, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Bin Liu, Pengfei Xia, Richard Stirling-Gallacher
  • Patent number: 10569874
    Abstract: A flight control method includes: determining a positional relationship between an aircraft and a control device; determining a polar coordinate system with the control device as an origin according to the positional relationship; receiving a flight direction control instruction sent by the control device, the flight direction control instruction being generated on the basis of the polar coordinate system; and driving, according to coordinate information about the aircraft in the polar coordinate system, the aircraft to fly in accordance with the flight direction control instruction.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: February 25, 2020
    Assignee: Xiaomi Inc.
    Inventors: Pengfei Zhang, Wei Cai, Yongfeng Xia, Hualin Ye
  • Publication number: 20200053783
    Abstract: A STA may comprise a receiver configured to receive an MU RTS frame transmitted to a plurality of STAs. The MU RTS frame may indicate, in a duration field, a duration of one or more frames to follow. The STA may further comprise a transmitter configured to transmit a CTS frame in response to receiving the MU RTS frame. Another frame comprising UL transmission information may be received by the STA which includes MCS indicators and allocates frequency resources for the plurality of STAs. A data frame may be modulated in accordance with an MCS indicator of the MCS indicators, and may be transmitted on frequency resources of the frequency resources allocated for the plurality of STAs. An acknowledgement frame, which acknowledges receipt of the data frame, may be received.
    Type: Application
    Filed: October 8, 2019
    Publication date: February 13, 2020
    Applicant: InterDigital Patent Holdings, Inc
    Inventors: Hanqing Lou, Guodong Zhang, Xiaofei Wang, Juan Fang, Oghenekome Oteri, Pengfei Xia, Monisha Ghosh, Robert L. Olesen
  • Patent number: 10555359
    Abstract: A method for operating a user equipment (UE) includes detecting a failure of a first link between the UE and an access node, and based thereon, detecting a second link between the UE and the access node, sending, to the access node, a beam failure recovery request (BFRQ) on one or more physical random access channel (PRACH) resources associated a third link conveying a reference signal, wherein the third link and the second link are quasi co-located (QCLed), wherein the BFRQ includes a group identifier associated with a UE group including the UE, and monitoring one or more PRACH response opportunities associated with the one or more PRACH resources for a beam failure recovery response (BFRP).
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: February 4, 2020
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu
  • Patent number: 10555307
    Abstract: A method for sending a beam failure recovery request (BFRQ) includes setting a demodulation symbol to a first value to specify a BFRQ signal, encoding the demodulation symbol with a first orthogonal code sequence, thereby producing an encoded first sequence of symbols, and send the encoded first sequence of symbols on a first physical uplink control channel (PUCCH) resource allocated for a first scheduling request (SR) transmission.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: February 4, 2020
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Bin Liu, Pengfei Xia
  • Patent number: 10555263
    Abstract: A method for controlling an uplink signal transmit power at the user equipment and a UE configured to perform such a method are disclosed. In an embodiment, the method includes receiving a downlink reference signal transmit power associated with a first resource indicator, a downlink reference signal transmit beamforming gain associated with a second resource indicator, an uplink signal receive beamforming gain associated with a third resource indicator, and an uplink signal target receive power associated with a fourth resource indicator and transmitting an uplink signal associated with a fifth resource indicator to a transmission point with a transmit power calculated based on the combination, wherein the downlink reference signal transmit power associated with the first resource indicator and the downlink reference signal transmit beamforming gain associated with the second resource indicator are signaled together as a single metric associated with a sixth resource indicator.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: February 4, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu, Richard Stirling-Gallacher
  • Patent number: 10530548
    Abstract: A transmit-receive-point (TRP) may send a beam management configuration message to a user equipment (UE) that includes downlink beam management configuration parameters to use for an ensuing beam management procedure between the TRP and the UE. The beam management configuration message may specify various parameters associated with TRP/UE beams that are to be evaluated during the beam management procedure, directional transmission/reception capabilities of the TRP (e.g., how many transmit-beams and/or receive-beams the TRP is capable of using for simultaneous direction reception/transmission, etc.), spreading sequence parameters (e.g., which spreading sequence, or spreading sequence group, is to be used during the beam management procedure), and/or beam management protocol information.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: January 7, 2020
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Pengfei Xia, Bin Liu
  • Publication number: 20190394004
    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: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Pengfei Xia, Bin Liu
  • Patent number: 10514406
    Abstract: A high resistivity material-based packaging element for an electric field sensor comprises: a substrate; a first packaging frame fixed to the substrate; and a first packaging cover fixed to the packaging frame; wherein at least one electric field sensor chip is located in an inner cavity formed by the substrate, the first packaging frame, and the first packaging cover, and at least one of the substrate, the first packaging frame, and the first packaging cover is of a high resistivity material having an electrical resistivity equal to or greater than 108?·cm. The present invention can ensure accurate measurement of the electric field, and provide an approach to solve the problem of environmental adaptability, thereby enhancing the stability and reliability of electric field detection.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: December 24, 2019
    Assignee: Institute of Electronics, Chinese Academy of Sciences
    Inventors: Shanhong Xia, Xiaolong Wen, Xianxiang Chen, Chunrong Peng, Pengfei Yang
  • Patent number: 10512056
    Abstract: A method for receiving device position determination includes receiving beamformed position reference signals (BF-PRSs) on a plurality of communications beams from at least two transmitting devices in accordance with a BF-PRS configuration, making at least one observed time difference of arrival (OTDOA) measurement in accordance with the BF-PRSs on the plurality of communications beams, and transmitting OTDOA feedback including the at least one OTDOA measurement.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: December 17, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Richard Stirling-Gallacher, Nathan Edward Tenny, Bin Liu, Pengfei Xia, Aimin Justin Sang, Jian Luo
  • Patent number: 10506456
    Abstract: Methods and apparatus are disclosed for communicating in a multi-band cluster. A multi-band member access point (MMAP) may be capable of communicating with a multi-band control access point (MCAP) using a first frequency band, and capable of communicating with associated stations (STAs) using a second frequency band. The MMAP may transmit data in the second frequency band to the associated STA, may transmit a request for interference information in the second frequency band to at least one associated STA, may receive an interference report in the second frequency band from the at least one associated STA, may transmit information in the first frequency band to the MCAP, wherein the information is based on the interference report received from the at least one associated STA in the second frequency band, and may receive, from the MCAP in the first frequency band, information regarding radio resource management of the second frequency band.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: December 10, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Oghenekome Oteri, Monisha Ghosh, Pengfei Xia, Robert L. Olesen
  • Patent number: 10469310
    Abstract: A method for operating a user equipment (UE) includes detecting that a beam failure has occurred, and based thereon, transmitting a first beam failure recovery request (BFRR) message at a first transmit power level on a first channel resource in a channel with a transmit power control mechanism configured to set the first transmit power level different from a first non-BFRR transmit power level of a first non-BFRR message transmitted on the first channel resource in the channel.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: November 5, 2019
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Younghoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20190334608
    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: July 6, 2019
    Publication date: October 31, 2019
    Applicant: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Patent number: 10461994
    Abstract: The disclosure relates to technology for beam failure recovery in user equipment. The user equipment sends a beam failure recovery request to the base station upon detection of a beam failure between the base station and the user equipment, and monitors one or more candidate beams in which to receive the beam failure recovery request response from the base station, based on an association between a beam failure recovery request response and a beam failure recovery request.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: October 29, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Bin Liu, Pengfei Xia, Richard Stirling-Gallacher
  • Patent number: 10448417
    Abstract: A method for communicating with an access node includes receiving measurement table information from the access node, wherein the measurement table information is derived from measurements of communications channels between access nodes and user equipments (UEs) served by the access nodes, determining an access strategy and an associated access parameter for a shared communications channel in accordance with the measurement table information, and transmitting an uplink transmission on the shared communications channel in accordance with the associated access parameter after obtaining access to the shared communications channel.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: October 15, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Xiaocui Li, Bin Liu, Kai Xu
  • Publication number: 20190313284
    Abstract: Mechanisms may be used for aggregating acknowledgement (ACK), block ACK (BA) and/or short packets transmissions for multi-user (MU) wireless communication systems. Aggregation mechanisms may be used for uplink (UL) and/or downlink (DL) orthogonal frequency division multiple access (OFDMA), and/or UL/DL multiple-user multiple input multiple output (MU-MIMO) transmissions, for example. Multi-user short packets may be aggregated and/or simultaneously transmitted for DL, UL, or peer-to-peer (P2P) transmissions.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 10, 2019
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Hanqing Lou, Oghenekome Oteri, Nirav B. Shah, Robert L. Olesen, Yuan Sheng Jin, Pengfei Xia, Frank La Sita, Guodong Zhang
  • Patent number: 10440750
    Abstract: A method and apparatus for supporting UL MU diversity are provided. The method may comprise transmitting a MU RTS frame to a plurality of STAs, the MU RTS frame comprising a plurality of MCS indicators, a plurality of data stream number indicators, an indication of a spatial technology, and a duration field. The MU RTS frame solicits clear to send (CTS) frame responses from a plurality of STAs and simultaneous UL OFDMA transmissions may be received in accordance with the MCS indicators, the data stream number indicators and the indicated spatial technology. An AP may transmit another frame comprising UL transmission information for transmission of data frames by the plurality of STAs. The AP may receive from the plurality of STAs, the data frames simultaneously and may additionally transmit acknowledgements of the received data frames to the plurality of STAs.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: October 8, 2019
    Assignee: InterDigital Patent Holdings, Inc
    Inventors: Hanqing Lou, Guodong Zhang, Xiaofei Wang, Juan Fang, Oghenekome Oteri, Pengfei Xia, Monisha Ghosh, Robert L. Olesen