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: 20220060240
    Abstract: A method includes receiving, from a second device, a signal using each beam of a first subset of beams of a beam set arranged in a layout, measuring a beam quality of the signal received using each beam of the first subset of beams, estimating a beam quality of the signal for each beam of a second subset of beams of the beam set, the first subset of beams and the second subset of beams comprising different beams, and the estimating being in accordance with the measured signal quality of the first subset of beams, selecting a beam from the beam set, selecting the beam being in accordance with the measured beam quality and the estimated beam quality, and communicating, with the second device, using the beam.
    Type: Application
    Filed: November 7, 2019
    Publication date: February 24, 2022
    Inventors: Pengfei Xia, Bin Liu, Young Hoon Kwon
  • Patent number: 11258482
    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: April 30, 2020
    Date of Patent: February 22, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Guodong Zhang, Oghenekome Oteri, Pengfei Xia
  • Patent number: 11252586
    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: Grant
    Filed: May 13, 2019
    Date of Patent: February 15, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Publication number: 20220046540
    Abstract: Embodiments of this disclosure provide techniques for signaling in power save mode. In particular, a UE may identify an association between a set of time durations for paging a downlink control indicator (DCI) transmission and a wake up signal (WUS) in a set of WUSs. Paging the DCI is transmitted in a beam sweeping manner and each beam used in each time duration in the set of time durations corresponds to a respective beam used for a WUS transmission in the set of WUSs. The UE monitors a radio link quality of WUSs in the set of WUSs and, based thereon, selects a first WUS in the set of WUSs. The UE identifies a first time duration for DCI page monitoring, the first time duration corresponding to the first WUS. The UE monitors the DCI page during the first time duration.
    Type: Application
    Filed: August 13, 2019
    Publication date: February 10, 2022
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Publication number: 20220045734
    Abstract: A computer-implemented method for operating a user equipment (UE) includes measuring beamformed reference signals, selecting one or more beams in accordance with the measured beamformed reference signals, and determining, by the UE, that an uplink transmit power of the UE on a subset of the one or more beams is limited by emission criteria, and based thereon, transmitting, by the UE, a beam report indicating the one or more beams and an uplink transmit power limitation.
    Type: Application
    Filed: April 29, 2019
    Publication date: February 10, 2022
    Inventors: Bin Liu, Pengfei Xia, Young Hoon Kwon
  • Patent number: 11245459
    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: August 14, 2020
    Date of Patent: February 8, 2022
    Assignee: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Publication number: 20220039019
    Abstract: A computer-implemented method for operating in a reduced power mode (RPM) of a user equipment (UE) in communications with a base station pursusant to a normal power mode (NPM). The NPM is characterized by one or more normal-power parameters comprising a normal sampling frequency and a normal signal bandwidth. The RPM is characterized by one or more reduced-power parameters comprising a reduced sampling frequency or a partial signal bandwidth. The UE determines whether to enter into the RPM for a duration. In response to determining to enter into the RPM for the duration, the UE powers down into the RPM by operating with the one or more reduced-power parameters for the duration of the RPM. Upon expiry of the duration of the RPM by the UE, the UE powers up into the NPM by resuming to the sampling frequency of the NPM and the signal bandwidth of the NPM.
    Type: Application
    Filed: June 19, 2019
    Publication date: February 3, 2022
    Inventors: Pengfei Xia, Bin Liu, Young Hoon Kwon
  • Publication number: 20220039166
    Abstract: A station may receive a frame transmitted to a plurality of STAs. The frame may indicate a first frequency resource allocated for the STA and a second frequency resource allocated for another STA of the plurality of STAs. The STA may transmit a data frame using the first frequency resource and receive an acknowledgement frame that acknowledges receipt of the data frame. The STA may receive a MU RTS frame transmitted to the plurality of STAs and may subsequently transmit a CTS frame in response to receipt of the MU RTS frame. The RTS/CTS transmissions may occur prior to transmission of the data frame.
    Type: Application
    Filed: October 19, 2021
    Publication date: February 3, 2022
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing LOU, Guodong ZHANG, Xiaofei WANG, Juan FANG, Oghenekome OTERI, Pengfei XIA, Monisha GHOSH, Robert L. OLESEN
  • Publication number: 20220039012
    Abstract: A method implemented by an access node includes transmitting, by the access node, a wake up signal (WUS) prior to a control channel occurring within an associated discontinuous reception (DRX) ON period, wherein the WUS is transmitted using a first beam, and transmitting, by the access node, the control channel during the associated DRX ON period, wherein the control channel is transmitted on a control resource set (CORESET) using a second beam, wherein the first and second beams share a common quasi-colocated (QCL) source.
    Type: Application
    Filed: May 22, 2019
    Publication date: February 3, 2022
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Patent number: 11228401
    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: Grant
    Filed: December 13, 2019
    Date of Patent: January 18, 2022
    Assignee: 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: 11218196
    Abstract: A mobile station may determine streams associated with a high efficiency (HE) wireless local area network (WLAN) communication. A number of symbols related to the streams may be utilized for HE long training field (LTF) communication.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: January 4, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Oghenekome Oteri, Pengfei Xia, Robert L Olesen
  • Publication number: 20210409969
    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: Application
    Filed: September 13, 2021
    Publication date: December 30, 2021
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hanqing Lou, Pengfei Xia, Monisha Ghosh, Oghenekome Oteri, Robert L. Olesen
  • Publication number: 20210399934
    Abstract: A computer-implemented method for operating a receiving device includes receiving a configuration for a first signal, wherein the first signal is configured for transmission in a first subcarrier spacing, wherein symbols of the first signal are each repeated an integer number of times, and wherein the integer number is equal to a ratio of a second subcarrier spacing to the first subcarrier spacing, and receiving the first signal in accordance with the second subcarrier spacing.
    Type: Application
    Filed: April 29, 2019
    Publication date: December 23, 2021
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu
  • Patent number: 11191104
    Abstract: Systems, methods, and instrumentalities are described to implement an interference management method in WLAN. An access point (AP) or an inter-BSS coordinator (IBC) may identify a station (STA) associated with a first basic service set (BSS) as an edge STA or a non-edge STA. The AP or the IBC may group the edge STA into an edge group and a non-edge STA into a non-edge group. The AP or the IBC may receive information associated with a second BSS. The AP or the IBC may coordinate access of the edge group and/or the non-edge group. The access may be coordinated to minimize interference of the edge STA. The access may be based at least on the received information associated with the second BSS. The AP or the IBC may adjust transmit power of a plurality of STAs identified as edge group STAs and non-edge group STAs.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: November 30, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Hanging Lou, Monisha Ghosh, Robert L. Olesen, Frank La Sita, Xiaofei Wang, Pengfei Xia, Nirav B. Shah
  • Patent number: 11177982
    Abstract: A method for transmitting feedback includes generating explicit channel feedback for a plurality of transmit beam-receive beam combinations (TRBCs) between the user device and a transmit-receive point (TRP), generating a modified resource in accordance with explicit feedback configuration information, the modified resource configured to convey the explicit channel feedback, wherein an explicit channel feedback associated with each TRBC is conveyed on a different data symbol of the modified resource, and transmitting the modified resource to the TRP using a single TRBC.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: November 16, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Richard Stirling-Gallacher, Bin Liu, Pengfei Xia, Nathan Edward Tenny, Hongcheng Zhuang
  • Patent number: 11171708
    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: February 25, 2020
    Date of Patent: November 9, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu, Nathan Edward Tenny
  • Publication number: 20210345376
    Abstract: Embodiments of this disclosure provide techniques for communicating in a wireless communications system. In particular, in an embodiment a base station receives a capability message from a user equipment (UE) indicating downlink scheduling delay. The base station transmits a downlink control frame to the UE in response to determining that transmitting a frame to the UE satisfies a scheduling delay condition. The downlink control frame indicates a scheduling delay of the frame equal to or greater than the downlink scheduling delay. The base station then transmits the frame to the UE in accordance with the downlink control frame.
    Type: Application
    Filed: April 29, 2019
    Publication date: November 4, 2021
    Inventors: Young Hoon Kwon, Pengfei Xia
  • Publication number: 20210336740
    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: Application
    Filed: July 6, 2021
    Publication date: October 28, 2021
    Inventors: Bin Liu, Pengfei Xia
  • Publication number: 20210337551
    Abstract: A method for operating an access node includes sending to a user equipment (UE) configuration information of a discontinuous reception (DRX) mode including DRX-ON periods for sending physical downlink control channels (PDCCHs) to the UE, and configuration information for an uplink transmission associated with a DRX-ON period, the uplink transmission is configured for beam quality confirmation of a PDCCH transmitted during the DRX-ON period associated with the uplink transmission, receiving the uplink transmission, wherein a receive beam used to receive the uplink transmission and a transmit beam used to transmit the PDCCH transmitted during the DRX-ON period are beam correspondent, and determining a beam quality measurement for a channel between the access node and the UE in accordance with the received uplink transmission.
    Type: Application
    Filed: September 19, 2018
    Publication date: October 28, 2021
    Inventors: Pengfei XIA, Young Hoon KWON, Bin LIU
  • Patent number: 11159218
    Abstract: A system and method for feeding back channel information are provided. A method for communications device operations includes generating feedback information, encoding the feedback information to produce a feedback payload, and transmitting the feedback payload to a communications server serving a communications device. The feedback information includes at least a first long term wideband channel statistics and a second long term wideband channel statistics.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: October 26, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Qiang Wu, David Jean-Marie Mazzarese, Yongxing Zhou, Yang Tang