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: 10419181
    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: November 30, 2017
    Date of Patent: September 17, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu
  • Patent number: 10411784
    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: Grant
    Filed: October 17, 2017
    Date of Patent: September 10, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Publication number: 20190273520
    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: May 17, 2019
    Publication date: September 5, 2019
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Yuan Sheng Jin, Pengfei Xia, Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Robert L. Olesen
  • Publication number: 20190273534
    Abstract: A method and apparatus may be used in multi-AP and multi-wireless transmit/receive unit joint transmissions. The apparatus may be configured to transmit a joint transmission request on a first medium, and receive a joint transmission response on the first medium. In response, the apparatus my perform a joint transmission negotiation on a second medium and transmit data on the second medium based on the joint transmission negotiation. The apparatus may be configured to perform coordinated sectorized or beamformed transmissions through access point (AP)/PCP negotiations. The apparatus may provide an indication of support for joint transmission and coordinated sectorized or beamformed transmissions. The method and apparatus may also implement multi-AP/WTRU request-to-send (RTS)/clear-to-send (CTS) procedures. The apparatus may be configured to perform coordinated sectorized or beamforming grouping.
    Type: Application
    Filed: May 22, 2019
    Publication date: September 5, 2019
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Guodong Zhang, Oghenekome Oteri, Pengfei Xia
  • Publication number: 20190268790
    Abstract: A method for measuring beams includes determining a measurement period duration in accordance with periods of one or more periodic beam failure detection (BFD) reference signals (RSs) of a BFD RS set, wherein the BFD RSs of the one or more BFD RSs of the BFD RS set have a quasi-co-located (QCL) relationship with demodulation RSs (DMRSs) of PDCCH receptions monitored by a user equipment (UE), monitoring a subset of the one or more BFD RSs having the QCL relationship with the DMRSs of PDCCH receptions monitored by the UE that occur during a measurement period, and determining that measures of all BFD RSs in the subset of the one or more BFD RSs do not meet a specified threshold, and based thereon, reporting a beam failure (BF) instance.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 29, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Patent number: 10397930
    Abstract: A method for resource and power allocation indication in a beam-based access system is provided. In an embodiment, a method for signaling power allocation in a beam-based access system includes determining, by a transmit point (TP), a relative effective transmit power offset between a control beam and a data beam. The method also includes signaling, by the TP, the relative effective transmit power offset to a user equipment (UE). The UE performs automatic gain control (AGC) on a control channel and a data channel according to the relative effective transmit power offset signaled by the TP.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: August 27, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Bin Liu, Richard Stirling-Gallacher, Pengfei Xia
  • Patent number: 10374683
    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: Grant
    Filed: October 27, 2017
    Date of Patent: August 6, 2019
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Patent number: 10368325
    Abstract: A method for beam adaptation in a beam-based communications system is provided. The beam-based communications system includes user equipment (UE) and a transmit-receive point (TRP). The method includes that UE determines a beamforming gain headroom (BHR) based on a UE maximum beamforming gain and a beamforming gain of a UE beam between the UE and the TRP, sends the BHR to the TRP, and receives a beam adaptation indication from the TRP.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: July 30, 2019
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Bin Liu, Pengfei Xia, Aimin Justin Sang, Richard Stirling-Gallacher
  • Patent number: 10356160
    Abstract: The present disclosure relates to a method for acquiring user information in a terminal device for acquiring user information and a terminal device thereof, and a method for acquiring user information in a server and a server thereof. The method includes: receiving acquisition information uploaded by a first wearable device bound. Herein the acquisition information comprises an identifier for identifying a second wearable device detected by the first wearable device; uploading the acquisition information to a server; receiving the user information pushed by the server. Herein the user information is obtained by the server according to the identifier and is associated with the acquisition information; and performing a processing operation according to the user information.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: July 16, 2019
    Assignee: XIAOMI INC.
    Inventors: Pengfei Zhang, Heng Qu, Yongfeng Xia, Yidong Wang
  • Patent number: 10334475
    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: Grant
    Filed: March 7, 2016
    Date of Patent: June 25, 2019
    Assignee: 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
  • Publication number: 20190182778
    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: Application
    Filed: February 13, 2019
    Publication date: June 13, 2019
    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: 10312950
    Abstract: Methods, systems, and apparatuses are disclosed for transmitting a plurality of bits to an access point (AP) and receiving constellation symbol from the AP. A constellation symbol may include a plurality of indications of bits. Each indication of the plurality of indications of bits may be associated with a respective wireless transmit/receive unit (WTRU) of a plurality of WTRUs. The plurality of indications of bits may include indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: June 4, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Yuan Sheng Jin, Pengfei Xia, Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Robert L. Olesen
  • Patent number: 10305550
    Abstract: A method and apparatus may be used in multi-AP and multi-wireless transmit/receive unit joint transmissions. The apparatus may be configured to transmit a joint transmission request on a first medium, and receive a joint transmission response on the first medium. In response, the apparatus my perform a joint transmission negotiation on a second medium and transmit data on the second medium based on the joint transmission negotiation. The apparatus may be configured to perform coordinated sectorized or beamformed transmissions through access point (AP)/PCP negotiations. The apparatus may provide an indication of support for joint transmission and coordinated sectorized or beamformed transmissions. The method and apparatus may also implement multi-AP/WTRU request-to-send (RTS)/clear-to-send (CTS) procedures. The apparatus may be configured to perform coordinated sectorized or beamforming grouping.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: May 28, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Guodong Zhang, Oghenekome Oteri, Pengfei Xia
  • Patent number: 10303135
    Abstract: A method and an apparatus are provided for controlling a smart home device. In the method, the apparatus acquires a target state of the smart home device, where the target state is a state determined according to visitor information within a predetermined range. The smart home device performs an operation corresponding to the target state. The smart home device flexibly performs different operations according to the actual visit situation so that working efficiency is improved. Especially when there are a large number of visitors within the predetermined range, the smart home device may automatically enter an unconventional working state, such that inconvenience caused by movement and noise to the visitors may be prevented, thereby improving overall performance of the smart home device.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: May 28, 2019
    Assignee: Xiaomi Inc.
    Inventors: Pengfei Zhang, Yongfeng Xia, Yidong Wang, Tiejun Liu
  • Publication number: 20190150010
    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: June 6, 2018
    Publication date: May 16, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20190141691
    Abstract: A method for operating a user equipment includes receiving a first frame on a first channel associated with a first beam identified during a beam failure recovery procedure, and determining that an assumed quasi-co-located relationship exists between the first channel and the first beam, and based thereon, decoding the first frame in accordance with a first reference signal on the first channel and using a first spatial domain receive filter that was used to decode the first beam.
    Type: Application
    Filed: May 23, 2018
    Publication date: May 9, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20190141712
    Abstract: A method for resource and power allocation indication in a beam-based access system is provided. In an embodiment, a method for signaling power allocation in a beam-based access system includes determining, by a transmit point (TP), a relative effective transmit power offset between a control beam and a data beam. The method also includes signaling, by the TP, the relative effective transmit power offset to a user equipment (UE). The UE performs automatic gain control (AGC) on a control channel and a data channel according to the relative effective transmit power offset signaled by the TP.
    Type: Application
    Filed: December 28, 2018
    Publication date: May 9, 2019
    Inventors: Bin Liu, Richard Stirling-Gallacher, Pengfei Xia
  • Publication number: 20190075573
    Abstract: According to one aspect of the present disclosure, there is provided a method that includes: transmitting, by a base station, scheduling information for a first uplink transmission to a user equipment with a first beam; receiving, by the base station, a first transmission of the first uplink transmission from the user equipment; and modifying, by the base station, transmission of an acknowledgment for the first uplink transmission in response to receiving an indication from the user equipment that the first beam has failed.
    Type: Application
    Filed: February 21, 2018
    Publication date: March 7, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20190075600
    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: Application
    Filed: May 25, 2018
    Publication date: March 7, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20190075599
    Abstract: A method for operating a user equipment (UE) includes detecting that a first request type of a first request is not a beam failure recovery request (BFRQ) and based thereon, selecting a first random access resource for transmitting the first request, wherein the first random access resource is selected from a first subset of one or more random access resources, and wherein random access resources in the first subset are associated with a communications beam serving the UE, and transmitting, by the UE to an access node, the first request in the first random access resource.
    Type: Application
    Filed: May 3, 2018
    Publication date: March 7, 2019
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu