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: 20190074891
    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: October 27, 2017
    Publication date: March 7, 2019
    Applicant: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Patent number: 10225806
    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: October 30, 2017
    Date of Patent: March 5, 2019
    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: 20190052337
    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: October 17, 2017
    Publication date: February 14, 2019
    Applicant: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Publication number: 20190053294
    Abstract: The disclosure relates to technology for beam failure recovery in user equipment, comprising detecting a beam failure event between the user equipment and a base station, sending a first beam failure recovery request (BFRQ) to the base station upon detection of the beam failure and searching for a beam failure recovery response (BFRP) within a first response window.
    Type: Application
    Filed: November 15, 2017
    Publication date: February 14, 2019
    Applicant: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu
  • Publication number: 20190053312
    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: Application
    Filed: December 8, 2017
    Publication date: February 14, 2019
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu
  • Publication number: 20190044792
    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: Application
    Filed: October 20, 2017
    Publication date: February 7, 2019
    Inventors: Younghoon Kwon, Pengfei Xia, Bin Liu
  • Publication number: 20190037596
    Abstract: According to some embodiments, a base station (BS) transmits a first allocation of a plurality of channel subsets to user equipments (UEs) for contention transmission of the UEs to the BS. The first allocation allocates one or more channel subsets to each UE so that each UE can only contend for channels within a channel subset allocated to the UE using a contention-based mechanism. In response to receipt of the first allocation, one or more UEs send requests to the BS requesting for access of channels for uplink transmissions determined by the one or more UEs. The BS determines, based on at least the requests sent by the UEs, channels to be allocated to the UEs for performing uplink transmissions, and sends a second allocation indicating the allocated channels. The UEs then perform uplink transmissions based on the second allocation.
    Type: Application
    Filed: July 26, 2017
    Publication date: January 31, 2019
    Inventors: Bin Liu, Pengfei Xia
  • Patent number: 10194445
    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: March 28, 2017
    Date of Patent: January 29, 2019
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Bin Liu, Richard Stirling-Gallacher, Pengfei Xia
  • Publication number: 20180368124
    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: Application
    Filed: January 25, 2018
    Publication date: December 20, 2018
    Inventors: Bin Liu, Pengfei Xia
  • Publication number: 20180367374
    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: Application
    Filed: November 16, 2017
    Publication date: December 20, 2018
    Applicant: Futurewei Technologies, Inc.
    Inventors: Bin Liu, Pengfei Xia, Richard Stirling-Gallacher
  • Publication number: 20180368104
    Abstract: A method for transmit in an uplink includes receiving from an access node, information associated with a scheduling grant for an uplink transmission, the information comprising position information of a network resource allocated for the uplink transmission and first beam information of a receive beam used by the access node to receive the uplink transmission, selecting a transmit beam used by a user equipment to transmit the uplink transmission, wherein the transmit beam is selected in accordance with the first beam information of the receive beam, and transmitting using the transmit beam, the uplink transmission in accordance with the position information.
    Type: Application
    Filed: June 14, 2017
    Publication date: December 20, 2018
    Inventors: Pengfei Xia, Richard Stirling-Gallacher, Bin Liu
  • Publication number: 20180368155
    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: Application
    Filed: June 16, 2017
    Publication date: December 20, 2018
    Inventors: Pengfei Xia, Xiaocui Li, Bin Liu, Kai Xu
  • Publication number: 20180368009
    Abstract: A method for operating a receiving device includes monitoring a transmission from transmitting device, deriving a reliability measure of the transmission, and detecting that a triggering condition comparing the reliability measure with a threshold is met, and based thereon, sending a triggering signal to the transmitting device to trigger a beam failure recovery procedure.
    Type: Application
    Filed: September 18, 2017
    Publication date: December 20, 2018
    Applicants: Futurewei Technologies, Inc., Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu
  • Publication number: 20180367191
    Abstract: A station may be used to implement non-linear coding based multiuser multiple-input multiple-output (MU-MIMO). The station may include a processor that may be configured to perform a number of actions. For example, the processor may receive a null packet from an access point (AP). Channel feedback may be generated using the null packet. The channel feedback may be sent to the AP. QR dependent information may be received from the AP. Data may be sent to the AP according to the QR dependent information.
    Type: Application
    Filed: August 27, 2018
    Publication date: December 20, 2018
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Pengfei Xia, Oghenekome Oteri, Nirav B. Shah, Monisha Ghosh, Hanqing Lou, Robert L. Olesen
  • Publication number: 20180367205
    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: Application
    Filed: November 22, 2017
    Publication date: December 20, 2018
    Inventors: Bin Liu, Pengfei Xia, Richard Stirling-Gallacher
  • Publication number: 20180331805
    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: Application
    Filed: December 27, 2017
    Publication date: November 15, 2018
    Inventors: Pengfei Xia, Bin Liu
  • Publication number: 20180331735
    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: Application
    Filed: September 28, 2017
    Publication date: November 15, 2018
    Inventors: Pengfei Xia, Bin Liu, Richard Stirling-Gallacher
  • Publication number: 20180324738
    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: Application
    Filed: May 5, 2017
    Publication date: November 8, 2018
    Inventors: Richard Stirling-Gallacher, Nathan Edward Tenny, Bin Liu, Pengfei Xia, Aimin Justin Sang, Jian Luo
  • Publication number: 20180310127
    Abstract: A method for user device position determination includes initiating a location determination process, receiving measurement reports originating from at least two user devices, the measurement reports include observed time difference of arrival (OTDOA) measurements associated with at least two access nodes, inter-device measurements (IDMs) among the at least two user devices, and angle information associated with the at least two access nodes, and determining positions of the at least two user devices in accordance with the OTDOA measurements associated with the at least two access nodes, the IDMs, and the angle information associated with the at least two access nodes.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 25, 2018
    Inventors: Pengfei Xia, Bin Liu, Nathan Edward Tenny, Richard Stirling-Gallacher
  • Publication number: 20180288755
    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: December 11, 2017
    Publication date: October 4, 2018
    Inventors: Bin Liu, Pengfei Xia